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INSTALLATION MANUAL - Advanced Wood Heat

1. gDSN3S NOI L d DNIdId X3d 3231298 ONT USDA JON 943 1109 Ni NOILVidva 3801 G ANNI4 DD 14 iNVvidva 3ZISdaN CIWIIdALD 3A WA AQAHD NIVad X3 UD IWNOLidO CWIIdAL YALAWOWASHL L BUILDING HEAT DISTRIBUTION SYSTEMS All piping pumps wiring and controls etc must be sized and installed by a qualified and licensed professional All items are to be installed in full compliance with all national state and local codes as well as the manufacturer s manuals and specific instructions For installations not covered in this manual contact your local GARN dealer or DECTRA CORPORATION for design assistance CONNECTION TO FORCED AIR FURNACE Water Air Coil A water air coil may be added to any forced air furnace or blower cabinet to serve as the primary source of heat When the room thermostat demands heat water from the GARN WHS unit is circulated through the coil and the blower moves air through the coil In a two fuel installation the thermostat will activate the auxiliary heating unit if there is insufficient heat from storage When adding a water air coil to any forced air furnace please note e DO NOT relocate modify or rest any of the safety controls in the original furnace installation e Blower pulleys and motor pulleys may be changed but the electrical current flowing through the motor is to be maintained within the nameplate rating Under some circumstances a larger motor may have to be i
2. 8 6 M JO pZ SLSIOF OLXZ CONSTRUCTION NOTES Drawings A 1 and A 2 represent one of many design options fora GARN Micro Energy Center building However the design and construction of any such facility must comply with all local state and national codes including wind uplift criteria windier areas will require stronger fastening methods to keep the roof and framing from being lifted off the foundation by strong winds It is the contractor s sole responsibility to ensure compliance with such codes All electrical wiring shall be in strict compliance with the National Electric Code NEC Installation of the GARN WHS unit shall be in strict compliance with the manuals provided with the unit The footing foundation may be constructed as a reinforced floating slab schematically shown or may utilize spread footings and a conventional slab Assuming reasonable soils bearing capacity of 2000 PSF or greater a 4 thick concrete slab with 6x6x10 10 wire mesh is sufficient to carry the weight of GARN unit In all cases standard good engineering practice dictates pouring the slab upon 6 to 8 of well compacted class 5 highway gravel Final foundation and slab design is the sole responsibility of the local engineer or contractor The exterior walls are constructed as follows siding tar paper or Tyvek 1 2 plywood or OSB sheathing 2 x 4 wood studs 24 on center 3 5 fiberglass insulation 6 mil vapor barrier and 1 2
3. or 5 8 sheetrock 3 4 exterior plywood is recommended as the exterior siding in the wood storage area to resist abrasive wear The 4 x 4 posts and the bottom plate of all walls must be pressure treated and anchored securely to the concrete slab The roof is constructed as follows shingles tarpaper 5 8 plywood or OSB 2 x 10 joists 24 on center and aligned with wall studs a maximum of 8 fiberglass insulation where appropriate 6 mil vapor barrier and 5 8 sheetrock Maintain a 1 air space over the insulation and install proper soffit and ridge vents The vaulted roof ceiling allows access to the manway on the top of the GARN unit The south facing portion of the roof may be sheathed with translucent fiberglass or tempered safety glass to enhance the drying of the firewood in the storage area The front wall at the GARN WHS unit is constructed as follows 5 8 sheetrock over 16 gauge metal studs Do not install sheetrock between the metal studs and the face of the GARN unit Do not use wood studs for framing the front wall The front wall is to be constructed to a height of 6 6 to allow access to the top of the GARN unit Set the GARN WHS unit on foam board according to the manual Insulate the GARN WHS unit in strict compliance with the manuals provided with the unit Install only DuraTech brand class A flue components this is a listing requirement including a wall shield at the rear of the GARN unit or appro
4. ATTACHED TO THE UNIT It is the sole responsibility of the owner to install maintain and test water treatment chemicals in order to minimize corrosion potential and damage Testing of the GARN water is required once every year with a copy of results forwarded to DECTRA CORPORATION A record of this compliance is required or warranty is VOID DECTRA shall not be liable for injury loss damage or any expense directly or indirectly arising from the use of the products it offers for sale or from any other cause This warranty does not cover any parts replacement due to shortage or damage in shipment exposure to weather improper installation operating the unit under abnormal conditions or other claims not agreed to in writing by DECTRA Replacement parts purchased from DECTRA are warranted for ninety 90 days from the date of installation No warranty is given in connection with second hand products and equipment or products and equipment altered or rebuilt without DECTRA s knowledge or written approval e No warranty is given regarding the predicted or actual performance of any product manufactured or supplied by DECTRA THIS WARRANTY IS EXPRESSLY MADE IN LIEU OF ANY amp ALL OTHER WARRANTIES EXPRESSED OR IMPLIED NO WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR PURPOSE SHALL APPLY NO WARRANTY OF LOCAL CODE ACCEPTANCE OR OF INSURANCE CARRIER ACCEPTANCE SHALL APPLY NO WARRANTY FOR INSTALLATION OR FOR HEATING SYSTEM PARTS OR PERFORMA
5. Ifall is well continue to burn until the water temperature is 190 to 200 degrees At this condition water level in manhole should be slightly below the overflow pipe If too much water was put in initially heat will cause it to expand and drain out the overflow CAUTION Take care when checking the water level at this temperature as the water vapor could cause burns 20 Check water level again after tank has cooled down to 100 degrees It should be a couple of inches below the overflow pipe During the first week or two the owner should check the water level at high and low water temperature levels Instruct the owner on this procedure It would be preferable for the dealer to make these checks GARN Installation Manual Rev11 Apr 2010 50 M SPECIFICATIONS WHS 1500 WHS 2000 SE 20 20 22 44 w o foam 24 w o foam 13 3 4 42 34 3 4 69 1 2 78 Fuel opening diameter 18 Overall Length 134 GARN Installation Manual Rev11 Apr 2010 51 WHS SPECIFICATIONS WHS 1500 Round 69 1 2 78 WHS 2000 Round 69 1 2 78 120 134 Diameter Height Tank Length Overall Length 110 Recommended wood length 24 to 32 24 to 32 Recommended wood diameter Weight emp Weight filled Nominal gallons of storage NPT Supply and return flanges 11 2 or 2 1 1 2 or 2 1 2 HP 3 4 HP 115 VAC 9 amps 115 VAC 11 amps 6 dia DuraTech Class A 6 dia Dur
6. amp upper cleanout l pkg plate with gasket Manhole cover with black self adhesive 1 4 x 1 gasket mounted in middle of door 1 AIR INTAKE amp EXHAUST FLUE ITEMS Galvanized combustion air inlet hood Air intake reducer 6 Class A flue 36 long Class A wall shield Adjustable SS elbow WATER TREATMENT ITEMS Water filter housing w replaceable 5 micron sediment cartridge 1 Water treatment chemicals 1 BLOWER ASSEMBLY 1 2 HP face mounted motor with cord in box box 4 socket head cap screws amp allen wrench 8 motor mount plate amp upper cleanout nuts 1 Motor mount spacer ring e Radial blade blower wheel 9 3 16 X 3 1 4 1 3 4 HP face mounted motor with cord in box 1 box 4 socket head cap screws amp allen wrench 8 motor mount plate amp upper cleanout nuts 1 Motor mount spacer ring Radial blade blower wheel 9 15 16 X 3 1 4 1 GARN Installation Manual Rev11 Apr 2010 55 PACKING LIST continued FACTORY INSTALLED ITEMS Secondary combustion chamber sections amp end gasket Installed Lower cleanout plates with gaskets amp left shield Installed Door latch bolt nut and lock washer Installed Magnesium anode rod s Installed Combustion Chamber Refractory Installed Secondary combustion chamber end plate Installed Firebrick 10 2 fireplace splits 4 1 2 x 2 x 9 Installed 18 1 fireplace splits 4 1 2 x 1 1 4 x 9 Installe
7. back of the combustion chamber Small chips in the liner are normal and will not affect the performance of the unit 3 Do not insulate unit until after start up procedure START UP OPERATION READ THE ENTIRE OPERATOR S MANUAL BEFORE STARTING THE FIRST FIRE Confirm that the water temperature is above 80 F before proceeding with the following steps 1 Open the fuel loading door 2 Place small kindling or a small amount of newspaper near front of combustion chamber Securely tuck the newspaper and or kindling under the first few log Paper can be sucked into the flues when the door is closed if not anchored down This step is eliminated when reloading the unit In some cases a few remaining coals and the hot bricks provide sufficient heat to ignite a fire even after sitting idle overnight 3 Place 50 to 85 lbs of one year dry cordwood 24 to 32 long and 3 to 10 in diameter into the combustion chamber Wood 10 in diameter and larger should be split once or twice Place the fuel toward the rear of the combustion chamber Load all wood carefully or damage to the reaction chamber may occur 4 DONOT OVERLOAD THE FIREBOX The wood fuel should not extend above the half way line of the loading opening Sufficient heat release volume must be maintained above the wood fuel for proper combustion 5 Turn WHS Timer on to confirm that the draft inducer is operative Shut Timer off 6 Light the paper and watch it for a few seconds
8. bring the water up to 80 F If neither of the above water warming techniques is workable start up will have to be accomplished with a wood fire Do this in compliance with the procedures set forth in the next sections however use only one year old dry cord wood 3 to 10 in diameter and build a full size fire Do not down size the fire in hopes of preventing condensation as a small fire will produce significant hazardous creosote as well as condensation GARN Installation Manual Rev11 Apr 2010 48 LEAK CHECK 1 Start at the unit and check for any obvious signs of water leakage particularly at the elements and sensor locations 2 Check supply and return pipes Make sure all threaded steel joints are doped and tight 3 Check dielectric fittings where steel pipe joins copper pipe check valves pumps gate and ball valves etc 4 Energize pumps circulate water and bleed air from all lines 5 Check water level after line bleed GARN UNIT CHECK If no leakage is evident and all items are installed and piped correctly make the following inspections before start up operations 1 Check door gasket and door latch adjustment Latch should be snug fitting If you need to force handle to get door closed adjust the door by rotating the inner disc until the latch closes snugly without excessive force 2 Is the ceramic reaction chamber with its end gasket in proper position Carefully slide it into the metal tube at the
9. clean water NOTE It is advisable to plumb the system so the entire distribution system can be isolated from the GARN unit This will aid in testing for leaks and any replacement of components FILLING WITH PROPER WATER TREATMENT CHEMICALS 9 10 11 Initial chemicals will be shipped to the new owner direct from the chemical supplier after they have tested your water sample Prior to filling the unit carefully read and follow the instructions provided with the chemicals Follow all safety procedures and retain the Material Safety Data Sheets Store all unused material in a locked and safe location away from children and animals but ALL the chemical should be added once the system becomes operational Fill the unit using the water filter to a water depth of 12 Add the initial quantity of treatment chemical according to the manufacturer s instructions and continue to add filtered clean water until the unit is full 4 below the crown at the top of the tank Check for and repair any pipe leaks Run all system pumps for at least four 4 hours to distribute the water and chemicals Inspect and add filtered clean water if the water level has dropped significantly PERIODIC TESTING IS A MUST After one week of operation obtain a treated water sample from the manway access Forward it to the water treatment supplier for an initial chemical test When drawing a sample always fully rinse the container twice with the water be
10. drained and flushed with a chemical cleaner before connecting it to the GARN unit Contact PrecisionChem for proper chemical and procedures WARNING Anti freeze used in distribution systems must be replaced after 3 5 years Anti freeze slowly degrades over a period of time and transforms into a very aggressive solution that readily attacks steel Thus any hydronic system that utilizes antifreeze MUST be periodically checked and the antifreeze replaced before it becomes aggressive WARNING Isolate GARN water from distribution system with a heat exchanger see below If the distribution system requires anti freeze the distribution system MUST be isolated from the GARN WHS heat storage water with a flat plate or equal heat exchanger WARNING The design and installation of your distribution system may cause the GARN tank to become sacrificial if proper procedures are not followed Connect only black steel pipe to GARN unit install dielectric couplings where copper pipe connects to steel pipe install the chemicals provided and test maintain your water chemistry twice per year Sacrificial anode rods further help reduce the potential for this type of corrosion Carefully follow all procedures specified in the Installation and Operators manuals CHECK VALVE EXISTING BOILER FROM GARN UNIT TO GARN UNIT a PUMP FLAT PLATE HEAT EXCHANGER GARN Installation Manual Rev11 Apr 2010 22 NEW BOILER SYSTEM FLUSHING AND RE
11. exchanger to interface with the GARN unit Refer to manufacturers manuals and data provided with the solar collectors regarding proper installation BACKUP HEATING If the GARN unit is being added to an existing building the existing heating system will normally be used as a backup system However off peak electric heating is available to serve as a backup to the wood heating Some utility companies offer discounted electric rates to installations using electric heat with heat storage equipment Contact your local utility about various programs Then contact your GARN dealer or DECTRA CORPORATION for electric backup heating options GARN Installation Manual Rev11 Apr 2010 47 M CHECK OUT AND START UP PROCEDURES REVIEW Before filling the GARN unit with water and chemicals review the following check list e Has the unit been assembled in strict compliance with the Unpacking amp Assembly section of this manual e Has the unit been installed in strict compliance with the Installation section of this manual as well as state and local codes Is all piping connected correctly Are shut off valves in place in correct open closed position and operable e Have all wiring and controls been installed by a Licensed Electrician and inspected by local code authorities e Has the unit been properly grounded electrically Are all unused electric element holes plugged inside of the element box e Have you thoroughly reviewed
12. is chosen to save on installation cost however undersized piping can dramatically reduce how efficiently the heat is distributed Often the required heat cannot be delivered regardless of the selection and sizing of other systems components This is an error that can only be corrected by replacing the undersized pipe a very expensive option C PROPER SIZING OF PUMPS Many people do not understand how to select a pump that matches the requirements of the system Use the charts in this manual and those supplied by pump manufacturers to insure the selection of the proper size and model of pump Consideration must be given to both the head loss and gallons per minute required at the lowest expected temperature C PROPER SIZING OF HEAT EXCHANGE EQUIPMENT Equipment should always be selected based on the system water temperature available and other components in the system Be careful of rules of thumb that appear too good to be true Rev11 Apr 2010 Dectra Corp
13. result in severe and quick corrosion problems GARN Installation Manual Rev11 Apr 2010 20 CORROSION and WATER QUALITY CONCERNS BACTERIOLOGICAL CORROSION Only about 9 of GARN WHS and ETS owners have had a corrosion problem it appears that most of those have been bacteriological in nature Bacteriological corrosion is highly unpredictable however once active it can corrode through a tank in a few months As indicated in the past visual inspection periodic testing and periodic cleaning coupled with ongoing chemical treatment is one of the most effective programs for corrosion prevention WATER POLLUTION There exists a wide range of normal water available to GARN WHS and ETS owners Generally GARN equipment is filled with water from a local rural well The pH level and the amount of iron hardness suspended particulates dissolved chemicals organics etc vary greatly in normal water During the past 20 years national surveys have shown a significant increase in the number of polluted rural wells thus compounding the already complex corrosion problem As a result it has become obvious that corrosion is a complicated issue requiring professional attention and ongoing owner maintenance COMMON TYPES OF BOILER CORROSION General surface corrosion this is similar to the rust you would find on bare steel that has been outdoors for a period of time Surface rust without pits is not critical but should be monito
14. rubber based hose such as Heatway tubing low density polyethylene polybutylene or PVC plastic pipe as radiant floor tubing All of these involve significant and complex corrosion and durability issues for the tubing pumps and controls as well as GARN equipment The installation of rubber based hose such as Heatway tubing low density polyethylene polybutylene or PVC plastic pipe in a radiant floor system connected to a GARN unit will void the GARN warrantee In new construction install 2 of blue yellow green or pink foam board extruded polystyrene foam minimum of 1 6 PCF density per ASTM C 578 95 specification under the entire slab that is to be radiantly heated The foam should be placed immediately below the bottom of the slab upon 6 of well compacted granular fill This construction provides a proper structural bed compacted gravel yet minimizes downward heat loss When radiant heating is utilized with above grade floors the underside of the floor MUST be insulated to prevent significant downward heat loss and overheating of the rooms below A minimum insulation valve of R 13 is recommended The radiant floor manifolds supplied by the manufacturers listed provide for room by room control while using a single pump and mixing valve Therefore multiple pumps valves are generally not required GARNB Installation Manual Rev11 Apr 2010 43 e Install a3 way mixing valve to bend cooler radiant floor return w
15. shall be discharged a minimum of 36 inches above grade A horizontal flue shall NOT be installed and flue gas should NOT be discharged horizontally e Within 20 feet of a powered air inlet into any building or structure except for the GARN WHS combustion air inlet GARN Installation Manual 11 Apr 2010 11 e Within 20 feet horizontally of any door window inside corner or gravity air inlet into any building or structure Ifa window door or air inlet is located above the horizontal flue Less than 8 feet above grade when located adjacent to public walkways Into a confined space between two buildings or structures Into an area that naturally collects leaf paper or other air borne debris that is combustible Onto a parking lot or into an area where vehicles may park e Closer than 18 inches from building siding when the discharge is aimed away from the building When wood or vinyl is the siding material e Into the wind as sparks may blow back against the building during higher wind conditions Always locate the horizontal flue so that exhaust gases move away from the building in the downwind direction during the heating season In addition flue gas shall NOT be discharged vertically e Less than 2 feet above any building component within a 10 feet radius of the flue The vertical flue must extend at least 3 feet above the roof surface where it penetrates the roof From a building with wo
16. that enhances the CLT 551 s ability to quickly establish a solid and uniform oxygen barrier at the metal surface This is equivalent to scraping washing and PRIMING a surface before painting You will use less paint and it will last longer In this application the surface preparation will ensure better protection and the need for less replacement chemical over time This flushing procedure requires filling your system adding required amount of PreCln 775 flushing compound circulating your system fired is best and then completely draining the entire system followed by a short rinse of clean fresh water The system is then refilled and the CLT 551 product is added for ongoing corrosion and system treatment FILL WATER QUALITY Much discussion could be made in regards to fill water quality softened or unsoftened water etc The design of your GARN WHS requires minimal make up water if operated properly This results in very low scale deposition potential mineral deposits Customers with very hard water of 14 grains per gallon would see some benefit in softening the water supply Softened water does not mean proper treatment chemical can be excluded In fact softened water requires close attention to corrosion protection Chlorinated water should never be added to any heating system A water sample of the proposed fill water must be sent to PrecisionChem before they will ship the appropriate chemicals tailored to your system MONITORING T
17. the Water Treatment Chemical and Suggested Water Treatment Procedures sections As stated in the Insulation section the unit and related piping does not have to be insulated prior to check out and start up It is much easier to located and correct pipe leaks etc without insulation in place If everything checks OK then fill the unit with clean water according to the Suggested Water Treatment Procedures section Any combustion process produces water in the form of water vapor One year old dry firewood stabilizes at approximate 20 moisture content When such wood is burned 1 to 3 gallons of water will condense within the unit as the temperature of the water in the GARN unit increases from approximately 50 F to 90 F The bulk of this water vapor is blown out the flue with the other products of combustion however some can puddle in the flue tubes and blower housing Although not dangerous it can be messy Therefore if the unit is filled with cold well water or water that is less than 80 F it may be best to warm the GARN water to 80 F before executing an initial fire This can be accomplished by the following methods e Ifthe average daily outdoor temperature is above 70 F simply let the unit sit for a few days and the air will warm the water This warming will be accelerated by activating the induced draft blower without a fire Ifthe unit is outfitted with optional electric heating elements simple set the electric controls to
18. the air collar Fasten the sheetrock to the flange utilizing the predrilled air collar holes and short lengths of steel studs behind the sheetrock essentially forming a sandwich that will draw the sheetrock to the flange Maintain a minimum 3 4 clear dimension between the edge of the sheetrock and the barrel of the air collar and L clear around the draft inducer housing Install galvanized steel stud framing as necessary to safely support the sheetrock face Tuck ONLY UNFACED rock wool or non binder fiberglass insulation between the sheetrock face and the front of the GARN WHS unit Review the drawing on the next page Provide access to the two lower cleanout covers as access for flue cleaning will be required on a routine basis Simply construct a box from non perforated metal studs large enough to accommodate the cleanouts extending from the tank face to the rear surface of the sheetrock face Install as part of the framing however do not cover with sheetrock and do not insulate If the GARN WHS unit is positioned against a concrete or block wall with the block wall forming one portion of the insulation enclosure install a 6 mil poly vapor barrier against the concrete or block wall before installing any insulation The poly will prevent the insulation from absorbing water from the concrete or block wall GARN Installation Manual Rev11 Apr 2010 17 NEW DR EXISTING WALL LIGHT GAGE GALVANIZED METAL STUDS TYPICAL THER
19. the return side of the furnace as warm air will be flowing over the blower motor and may not provide sufficient motor cooling Hot Water Baseboard Heating HWBB output ratings are based upon a 1 gpm to 4 gpm flow rate and a 215F entering water temperature EWT for most and 1 standard sizes The following correction factors are to be applied to the 215F ratings when a lower EWT is utilized EWT 180F 160F 140F 120F FACTOR 69 33 KE 25 Normal temperature drop is 10F to 20F per HWBB run Many non wood systems today are based upon an EWT of 140F and a RWT of 120F to take advantage of condensing boilers Combining a radiant floor manifold and PEX tubing with HWBB can yield individual room control with wall mounted night set back thermostats Modern European flat panel wall mounted steel radiators such as Runtal etc are similar in flow requirements as HWBB DECTRA CORPORATION APRIL 2010 GARN Installation Manual Rev11 Apr 2010 27 K _PIPING and PUMPS TO DISTRIBUTE THE HEAT The GARN WHS unit is non pressurized As such the gasketed manway cover is simply set upon the top surface of the manway access ring DO NOT FASTEN OR OTHERWISE ADHERE the cover to the tank or access ring likewise do not add weight to the cover after the cover is in its final position An internal overflow vent will prevent the development of internal pressure that could result from the gentle expansion and contraction associat
20. to a minute to confirm that the paper has ignited 7 Turn the WHS TIMER past the 3 hour setting to activate the draft inducer 8 Close door 9 After 15 minutes open door check fire add more wood if necessary close door GARN Installation Manual Rev11 Apr 2010 49 10 Note the water temperature What is the rise in temperature from the start in 1 above It should be in the range described in the Operator s Manual 11 If you have experienced any problems up to this point turn the power off LEAVE THE DOOR CLOSED and call your dealer Discuss the problem before proceeding further 12 If there are no problems allow the unit to burn for an hour or more 13 The water should be approximately 120 F at this point If no problems have developed add additional fuel wood and shut the door Again do not load past the 1 2 full mark in order to allow for sufficient heat release volume above the woodpile 14 Ten minutes after loading open the door and observe if combustion is proceeding 15 During this first burn check for leaks and pump operation When the thermostat calls for heat the pump should operate 16 Check supply return water pipes at various locations to verify heating conditions 17 If air vents are installed and there is not heat being delivered bleed air from system 18 Note water temperature after completed second burn Did you get a similar but slightly less rise in water temperature 19
21. 0 14 GARN s Vertical Flue Connection The GARN WHS unit can also be purchased with a top vertical flue connection Utilize only DuraTech Class A 2100 F HT flue components installed in strict accordance with DuraTech installation instructions Installation will require the use of DuraTech Class A 2100 F HT components to pass through the ceiling attic and roof Connect and seal the flue connections as indicated above Vertical Flue Height The vertical flue must extend to a height not less than 2 feet above any building component within a 10 feet radius of the flue If the vertical portion of the flue penetrates the roof overhang a DuraTech Firestop radiation shield and adjustable roof flashing are required The vertical flue must extend at least 3 feet above the roof surface where it penetrates the roof DO NOT INSTALL A FLUE CAP as it will unduly restrict the flow of pressurized exhaust gases Check with your local building inspector some States may have minimum flue height requirements NOTE A vertical flue should not be used if the building has wood shingles or if the flue would have tree s branches above it Connection to a Masonry Chimney Only under limited circumstances may a GARN WHS unit be connected to a masonry chimney Masonry chimneys are designed for heating devices that burn continuously in cold weather Because the GARN WHS unit is only burned periodically the masonry chimney must have a continuous insulated mini
22. 000 480 000 720 000 Remember e Die electric couplings must be installed between any metallic pipe and the GARN WHS unit If using copper pipe see the next paragraph e When installing copper distribution pipe use ONLY long sweep elbows 95 5 solder or brazing and die electric couplings where copper pipe joins steel pipe DO NOT CONNECT copper pipe directly to the GARN WHS unit as electrolytic corrosion will occur Install 4 to 6 of black steel pipe between the copper pipe and the GARN WHS unit e If installing steel pipe use ONLY black steel pipe DO NOT USE galvanized pipe e NOT install polybutylene or PVC plastic pipe e Provide pipe support according to plumbing code guidelines e After installation flush all piping to remove threading oil solder flux debris etc e All check valves and ball valves shall match pipe size Ball valves shall be full port if possible DONOT install piping to produce a bull headed tee condition e Install accessible shut off valves on the supply and return pipes near the GARN WHS unit GARN Installation Manual Rev11 Apr 2010 29 Flow and heat capacity 6 of head loss per 100 of pipe length SIZE INSIDE DIA FLOW gpm BTU HR 20F delta T BTU HR 30F delta T Oxygen Barriered PEX Tubing 3 4 4 1 1 4 1 1 2 2 678 4 5 45 000 67 500 875 6 5 65 000 97 500 1 28 19 190 000 285 000 1 60 34 340 000 510 000 2 03 64 640 000 960 000 Type L Rigid Copper
23. 3 19 25 31 38 Aa 53 61 69 78 86 95 1 0 The above table can be used to determine the difference between the BTU HR delivered by the existing system vs the BTU HR that can be delivered by the GARN system at a lower supply water temperature A standard of 215 degrees is used in the industry as the basis for rating If a baseboard is rated at 1000 BTU s linear foot at 215 degrees contact manufacturer for output ratings the table indicates that at 180 degrees the existing baseboard can deliver 69 of the rated BTU s or 690 BTU s linear ft A GARN system sized to use 140 degree water will yield 38 of the rated BTU s or 380 BTU s linear ft If the old system was sized twice as large as the actual heat loss a common occurrence then the sizing of the GARN system for 140 degree water is correct If more heat is required a larger storage system or more baseboard footage will be required GARNG Installation Manual Rev11 Apr 2010 42 The drawing below shows a simple multiple zone hot water baseboard system FROM GARN UNIT TO GARN UNIT MANUAL AIR BLEED CHECK SYSTEM PUMP Radiant floor guidelines Use only oxygen barriered cross linked high density polyethylene for radiant floor installation HeatLink Wirsbo Kitec and Roth are the preferred brands Any radiant floor system shall be installed in strict compliance with manufacturers specific instructions In addition DO NOT USE steel copper
24. DistbuteDiag 45 NPSHA AP SP HL VP where Atm ospheri c AP Job site atmospheric pressure in feet Pressure SP Static water pre ssure at the pump in feet HL Head losses at pump inlet in feet VP Vapor pressure at desired HWS temperature in feet AY Y Hot Supply Conne ction STATIC PRESSURE GARN Unit HEAD LOSS E IN PIPING Pump Doma Cerperaron 2008 GARN Installation Manual Rev11 Apr 2010 31 The NPSHA net positive suction head available is calculated thus NPSHA AP SP HL VP where AP Job site atmospheric pressure in feet SP Static water pressure at the pump in feet HL Head loss between GARN and pump inlet in feet VP Vapor pressure at desired HWS temperature in feet NPSHA must always be greater than the NPSH required for the pump at design GPM or cavitation and suction boiling will occur HL is the summation of pipe fitting and valve pressure losses between the GARN unit and the inlet of the pump All losses are to be calculated at maximum system design flow GPM Such losses are normally expressed in feet of head The shown tables list atmospheric pressure AP at various elevations and vapor pressure VP at various HWS temperatures TABLE 1 Elevation ft Atmospheric Boiling Point of Pressure ft Water Deg F 1000 32 8 u a 202 F The above numbers are rounded
25. FILL WITH CHEMICAL A GARN WHS purchase includes the price of CLT 551 that is sized appropriately to provide the initial dose of chemical required for start up However the system should always be filled heated flushed and re filled prior to the CLT 551 being added This will help remove any foreign materials within the GARN unit or piping system that result from the manufacturing transportation and installation process Remove any internal accumulated dirt from manufacturing trucking or on site construction and thoroughly flush wash the entire inside of the tank as noted below PREFERRED CLEANING Dectra encourages GARN owners to use a pre wash to clean and prime the steel for the regular water treatment chemicals This may be purchased with the GARN unit or directly from PrecisionChem after the unit is received It is recommended for the flushing of new GARN WHS installations The PreCln 775 flush process can also be done at a time after initial start up with the same excellent results It is safe for all system components and should be circulated The product is biodegradable and safe to add to a municipal waste sewer or drained onto an appropriate ground surface Do not add to a septic system Using PreCln 775 will remove all manufacturing by products grease mill scale etc that may contribute to a dirty system and sludge formation In addition the mild steel interior surfaces are passivated or primed by the flushing chemical
26. HE STEEL TANK DO NOT INSTALL INSULATION WITHIN THE ELECTRIC ELEMENT BOX 8 Fill the insulation enclosure to a level about 6 above the tank portion of the GARN WHS unit Steel studs may be extended across the top of the tank to fasten opposite enclosure walls together Prevent loose insulation from falling into the manway opening The manway cover does not need to be insulated as the heat loss through it is minimal 9 In an industrial setting the GARN WHS unit may be wrapped with pre formed high density non combustible fibrous insulation covered with a fireproof canvas and plaster overcoat This would eliminate the construction of an insulation enclosure and allow ongoing easy access to all sides of the unit CAUTION The GARN WHS unit is non pressurized As such the manway cover should just rest on the manway opening In a case of rapid boiling the manway cover is designed to allow for the rapid escape of water vapor Therefore DO NOT FASTEN BRACE OR ADD WEIGHT TO THE MANWAY COVER SO THAT IS UNABLE TO FUNCTION PROPERLY GARN Installation Manual Rev11 Apr 2010 19 L_WATER TREATMENT CHEMICALS GARN WHS WATER TREATMENT PROGRAM CORROSION PROTECTION IS THE SOLE RESPONSIBILITY OF THE OWNER GARN equipment has always been fabricated from quality materials utilizing quality methods that inherently reduce corrosion potential Once delivered the manufacturer is not able to control the installation the quality of the fill wate
27. INSTALLATION MANUAL FOR GARN MODELS WHS 1350 1450 1500 1900 2000 amp 3200 yatEeRTe wan Innovators in affordable energy systems US yett fnock INSTALLATION INSTRUCTIONS GARN MODELS WHS 1350 1450 1500 1900 2000 amp 3200 The GARN unit all related heating equipment including pumps piping fan coils hot water baseboard radiant floor heating systems etc and all electrical equipment including power wiring controls control wiring back up electric heating etc must be installed by a qualified installer or competent licensed personnel in strict compliance with all Federal State and local codes All electrical equipment devices and wiring installed with the GARN unit must be UL listed Installer to supply and install all code required electrical over current and disconnect devices See the WHS 3200 Addendum for specifics that apply only to the WHS 3200 TABLE OF CONTENTS Codes and Insurance pg s 3 Unit Placement pg s 3 8 Plans for a typical GARN BARN Energy Center Combustion Air Inlet Installation pg s 9 10 Exhaust Flue Selection pg s 11 Exhaust Flue Installation Horizontal amp Vertical Clearances pg s 11 15 Flue Caps pg s 15 Additional Comments pg s 16 Insulation of the Unit pg s 17 19 Water Treatment Chemicals pg s 20 25 Rules of Thumb for Estimating pg s 26 27 Piping and Pumps to Distribute the Heat pg s 28 38 Building Heat Distr
28. LIFTING LUG NPT FLANGED PIPE CONNECTION 6 CLASS A O CONNECTION COMBUSTION AIR CONNECTION O SHIPPING TIE be HOLE NPT FLANGED O O O PIPE CONNECTION Air Inlet Installation Models WHS 1350 1450 1500 2000 AND 2100 Combustion air for the GARN WHS unit is brought in from the outdoors through a 7 diameter single walled duct The unit is to be operated ONLY when connected to an outside air source The air duct may have no more than two 2 90 degree bends and its total length cannot exceed 12 feet when using 7 diameter duct It is connected to the lower 6 diameter pipe extending from the back of the GARN WHS unit with a 7 x 6 reducer fitting and a collar clamp The combustion air inlet duct does not require a wall thimble The air inlet should extend above any obstructions and possible snow drifts The outdoor portion of the inlet duct must consist of a 7 diameter fresh air intake hood similar to a dryer vent without a back draft damper with a galvanized 1 4 or 1 2 inch mesh screen The hood is provided as part of your GARN WHS unit the other items are available from your local hardware store or heating contractor GARN Installation Manual Rev11 Apr 2010 9 The total air pressure drop through the air intake duct must not exceed 0 10 inches of water at 70 degrees air temperature at a flow rate of 300 CFM Inlet screens must be checked for freeze over during cold weat
29. MOMETER WW E lt ER Se e LOWER CLEAN QUTS PERIODIC ACCESS REQUIRED 5 DONOT INSTALL any electrical wiring fixtures switches etc within the enclosure as such wiring may overheat creating a fire hazard Rather install all electrical wiring in light gauge metal conduit run on the exposed exterior surface of the enclosure Install and fasten in place according to the National Electrical Code Wiring is to be only installed by a Licensed Electrician 6 Properly ground the GARN WHS unit to help avoid corrosion due to a floating ground DO NOT USE THE STEEL CONDUIT AS A GROUND CONDUCTOR Provide a dedicated driven ground rod and wire in addition to the normal ground that is connected to the electrical service panel GARNG Installation Manual Rev11 Apr 2010 18 7 Itis essential that insulation completely surround the GARN WHS unit Use ONLY the following types of NON COMBUSTIBLE INSULATION Vermiculite Dense pack blown in non binder fiberglass or rock wool Unfaced glass fiber batts Unfaced rock wool batts Vermiculite insulation will naturally flow beneath the unit However if blown in or batt insulation is used be sure to slide unfaced batt insulation beneath the GARN unit between the skids and within the skids CAUTION DONOT USE FOAM BOARD OR FOAM BEADS AS BOTH WILL MELT AND ARE A FIRE HAZARD DO NOT USE CELLULOSE INSULATION AS THE ACID TREATMENT OF THE CELLULOSE INSULATION WILL CORRODE T
30. NCE SHALL APPLY The foregoing warranty periods shall each commence on the date of shipment to user of the products or parts and the obligation of DECTRA with respect to such products or parts shall be limited to replacement or repair FOB point of origin and in no event shall DECTRA be liable for consequential or special damages or for transportation installation adjustment or other expenses which may arise in connection with such products or parts Determination of what is a defective part assembly or product is the sole responsibility of DECTRA CORPORATION personnel The obligation of DECTRA hereunder with respect to any products or parts shall be to replace or at its option to repair parts determined to be defective in materials or workmanship Correction of any such defects by repair or replacement shall constitute fulfillment of all obligations of DECTRA to the Purchaser hereunder DECTRA assumes no liability for labor or any other expenses incurred by anyone without DECTRA s express written consent No person agent or representative is authorized to give any additional warranty on behalf of DECTRA or assume for DECTRA any other liability in connection with any GARN products DECTRA CORPORATION 3425 33 Avenue Northeast St Anthony Minnesota 55418 Phone 612 781 3585 Fax 612 781 4236 Web Site www garn com Copyright April 2010 by DECTRA CORPORATION All rights reserved No part of the contents of this manual may
31. ONAL 6 MIL POLY BAG CONTINUOUS OVERLAP TOP 18 AND TAPE CONTINUOUS TO BE USED IN WET LOCATIONS OXYGEN BARRIERED PEX FLEXIBLE CORREGATED HOT WATER SUPPLY AND RETURN PIPES POLYETHYLENE PROTECTION PIPE 3 4 WALL POLYOLEFIN CLOSED CELL PIPE INSULATION TAPE BUTTED JOINTS NOTE MICROFLEX PRE INSULATED PEX PIPE MAY BE SUBSTITUTED FOR THE HOT WATER PIPES INSULATION AND PROTECTION PIPE MOUND SOIL TO OFFSET SETTLING 12 TO 18 CLAY CAP SIDE OF TRENCH EXCAVATED UTILIZING CONTINUOUS TRENCHING EQUIPMENT BACKFILL WITH SITE MATERIALS FROST DEPTH MINIMUM H GREATER PREFERRED BACKFILL WITH CLEAN DRY SOIL OR SAND COMPACTED FIRMLY OXYGEN BARRIERED PEX HOT WATER RETURN PIPE OXYGEN BARRIERED PEX FLEXIBLE CORREGATED HOT WATER SUPPLY PIPE POLYETHYLENE PROTECTION PIPE 3 4 WALL POLYOLEFIN CLOSED CELL PIPE INSULATION TAPE BUTTED JOINTS 4 PERFORATED DRAIN LINE TO DAYLIGHT IN WET LOCATIONS UAKING LIStallduonl ividludl 7 UREVIL ADI Zulu OF Pump Selection and Installation Guidelines All pumps must be selected based on a calculated total static and frictional head loss of the piping connected to the pump as well as the calculated required system flow Preferred pump brands include Wilo Taco Bell amp Gossett and Grundfos Select a pump that delivers a flow rate that does not violate the above listed General Piping Guideline for head loss and fluid velocity Size t
32. Tube max vel 6 sec for noise max vel 10 sec for erosion 3 4 1 1 1 4 1 1 2 2 785 4 2 42 000 63 000 1 025 8 5 85 000 127 000 1 265 15 120 000 180 000 1 505 23 230 000 345 000 1 985 48 480 000 720 000 Schedule 40 Black Steel Pipe 3 1 1 1 4 1 1 2 2 824 5 5 55 000 82 000 1 049 9 5 95 000 142 000 1 380 19 190 000 285 000 1 610 30 300 000 450 000 2 067 60 600 000 900 000 Install a separate boiler drain at the designated fitting on the front head of the unit Install drain valves where appropriate and required to allow future maintenance and equipment repair replacement DO NOT Install automatic air bleeds in a non pressurized system Install only manual air bleeds at all system high points In new installations a floor drain should be provided to accommodate the over flow pipe and drain valve Install a domestic water sill cock for adding water near the GARN WHS unit A filter housing and filter is provided and should be mounted in series with and adjacent to the sill cock Use a hose to fill the unit through the manway opening DO NOT permanently connect the GARN WHS unit to a domestic water source Insulate all above grade piping with 4 to 2 wall polyolefin pipe or fiberglass insulation rated to 212 degrees Thermocel Imcolock Imcoshield are preferred brands Retrofitting a GARN WHS unit to an existing pressurized heating system will require the installation of a pre
33. UM TO ACCEPT HOTWATER COIL USE FULL FACE HOTUATER COIL AREA SUPPLY WATER PIPE COIL FOR COUNTERFLOW RETURN WATER APPLICATION t NOTE WIRE DUCTSTAT TO DE ENERGIZE PUMP ON TEMP RISE PETERIN ALR TO SET POINT Lag F AS PER CODE Forced air furnace coil on discharge side of furnace CAM STAT TT 125L2 5 DUCTSTAT 125 F OPEN 100 F CLOSED SUPPLY AIR RETURN AIR 4 RETURN WATER _ PIPE COIL COUNTERFLOW AS SHOWN SUPPLY WATER HOTWATER COIL Forced air furnace coil on return side of furnace GARNB Installation Manual Rev11 Apr 2010 41 CONNECTION TO HOT WATER BASEBOARD SYSTEM Hot water baseboard guidelines Install good quality even commercial grade hot water baseboard Sterling is a preferred brand Cheaper grades produce few BTU S per linear foot of baseboard thus require significantly more footage for a given heat loss Look for copper tube aluminum finned elements full back plates and die formed hangers with nylon or roller slides to eliminate noise In addition e Size the baseboard for 140 F supply water temperature and a 20 F temperature drop e Circuit baseboards in a parallel configuration so that all elements receive the same 140 F supply water e Utilize either copper or oxygen barriered cross linked high density polyethylene for supply and return piping e DO NOT mount the baseboard closer than 4 above the floor Size the pump to provid
34. aTech Class A Flue collar and flue 2100F HT 2100F HT Air intake fitting 7 dia screened hood Combustion chamber length 42 Nominal Combustion chamber diameter Height to chamber opening Average BTH HR into storage Approx BTU s degree of water temperature change MATERIAL SPECIFICATIONS Tank shell mild steel MS 7GA Front and back heads MS 3 16 MS 3 16 MS 3 16 Door spinnings 3 to 10 3 900 lbs 20 600 Ibs 1 870 gallons 3 to 10 3 000 lbs 15 500 lbs 1 496 gallons Draft inducer motor Electrical requirements 7 dia screened hood 42 25 firebrick lined 25 firebrick lined 39 350 000 fuel dependent 425 000 fuel dependent LA 12 476 15 270 7 GA 3 16 3 16 3 16 12 GA 16 GA 16 GA 3 16 10 GA Welded Steel Boiler Tube NOTE All welding conforms to AWS specs All seams joints etc exposed to water are welded to prevent crevice corrosion Figures based on split 24 oak with 17 moisture and reloading once hour 12 GA 16GA 16GA 3 16 10 GA Welded Steel Boiler Tube GARN Installation Manual Rev11 Apr 2010 52 DIMENSION WHS 3200 46 15 72 146 20 30 4 43 94 Fuel opening diameter 25 5 Overall Length 162 GARN Installation Manual Rev11 Apr 2010 53 46 w o foam 25 w o foam WHS SPECIFICATIONS EE WHS 3200 Round 93 Tank Length 146 Overall Lengt
35. ach unit by model WHS 1450 1710 psf WHS 1500 1755 psf WHS 2000 1810 psf WHS 2100 1705 psf Various soil types and their allowable bearing capacities Rock 8000 psf Gravel 4000 psf Sand 2000 psf Loose sand clay 1000 psf For most average soils with an allowable bearing capacity equal to or greater than 2000 psf use a 4 thick 3000 psi concrete slab with 6 x 6 x 10 10 welded wire mesh reinforcement For soils with an allowable bearing capacity less than 2000 psf use a 5 1 2 thick 3000 psi concrete slab with 6 x 6 x 10 10 welded wire mesh reinforcement e The slab width and length should at least equal the enclosure size and have reinforced edges Consider trenching for and location of pipes depth direction and other underground utilities Setting of the Unit Once the location is determined set and center each skid on 1 1 2 thick x 16 wide blue yellow green or pink foam board extruded polystyrene foam minimum of 1 6 PCF density per ASTM C 578 95 specification DO NOT USE WHITE BEAD BOARD The foam should be cut to the length of the skids plus 2 Lever each side of the tank off the ground and slide the foam under the skids The compressive strength of this type of foam board is approximately 3 100 psf The concrete slab that supports the GARN unit must be relatively FLAT The entire flat surface may slope slightly but skids under the unit must be fully supported over their entire area GARN I
36. air discharged from the coil reaches 120F degrees the switch stops the fluid flow through the coil No additional heat will be available from the coil and the blower motor will not be subjected to excessive air temperature If the coil is placed on the supply airside the high limit switch located on the downstream side of the coil provides overheating protection for the space being heated If the temperature of air discharged from the coil reaches 140 degrees the switch stops the fluid flow through the coil GARN Installation Manual Rev11 Apr 2010 39 Blower Adjustment It is very important that the proper air volume is supplied to the heated space across the furnace s heat exchanger and across the coil These air volumes are to be determined by design specifications A draft gauge reading of pressure drop across the furnace is taken before the coil is installed This yields the initial system air volume After the coil is installed a pressure drop across the coil should be taken to indicate the new system air volume This new system air volume must be adjusted to supply 1 the minimum air volume across the furnace s heat exchanger as specified in the manufacturer s engineering data 2 the proper air volume across the coil to yield the required output 3 the proper air volume to heat the space gt A minimum of three 1 4 air test holes must be drilled One in the ductwork on both sides of the furnace and one on b
37. ally to minimize the potential of a creosote fire EXTERIOR WALL OF BUILDING WALL THIMBLE CLASS A FLUE METAL BARREL SAND ON BOTTOM Vertical Flue From A Horizontal Connector Using An Exterior T SCREEN ON TOP If the GARN unit has a horizontal flue connection and a vertical flue is required or desired utilize only DuraTech Class A 2100 F HT flue components installed in strict accordance with DuraTech installation instructions Mount the vertical flue on the exterior of the building DO NOT install a vertical flue within a building unless approved by your local building inspector Installation will require the use of the following additional DuraTech Class A 2100 F HT components e Tee with bottom clean out cap e Adjustable tee support bracket Wall thimble e Adjustable wall supports GARN Installation Manual Rev11 Apr 2010 13 Diagram Showing Vertical Flue Using An Exterior T From DuraTech a EXTERIDR WALL E es BUILDING FY 1 CLASS A FLUE W CAP PROVIDE ADJUSTABLE 4 TEE SUPPORT BRACKET WALL THIMBLE a AIR INLET HOOD Diagram Showing The GARN Unit With The Factory Vertical Flue Connection INSTALL FLUE MANUFACTURER S ROGE RECOMMENDED COMPONENTS WHERE THE FLUE PASSES DO TT THROUGH CEILING ATTIC amp ROOF t CLASS A FLUE EXTERIOR WALL OF BUILDING AIR INLET HOOD GARN Installation Manual Rev11 Apr 201
38. ass A chimney DO NOT connect this unit to a chimney flue serving another appliance Place only on a non combustible floor and maintain the following minimum clearance to combustibles Sides top and rear 2 in Front 60in Class A flue 2 This equipment may only be installed by qualified personne This appliance may be connected to an existing boiler system by utilizing a water to water heat exchanger Refer to the Installation Manual for additional specific information REQUIRED CONTROL Use only wih GARN WHS ETS CONTROLLER and GARNES sensor stems or float switch OPTIONAL CONTROLS f supplemental clectric heating is desired use only GARNZ ETS components and controls or UL listed components and controls Refer to the GARN ETS Manual for sizing installation operation cte OPERATION Refer to and review the Controller label and the Operator s Manual supplied with this appliance Burn only wood densified wood briquettes or corn on the cob DO NOT LOAD fuc above the mid point of the fuel loading door Load fuel carefully or damage may result DANGER DO NOT OPEN THE LOADING DOOR in the event of a power failure Hot surfaces Keep children away Do not touch during operation ee WHS1350 WHS 1900 Se WHS1450 O WHS 2000 See us O WHS 1500 ETS Package WIN 0488 SERIAL NUMBER XXXXXX This non pressurized wood fired hydronic heater is covered by one or more of the following United States and Foreign Pa
39. ater with hot supply water from the GARN unit in order to maintain the moderate supply water temperatures between 95 F and 130 F required for radiant floor heating Mixing valve brands are Paxton ESBE Honeywell Sparco and Watts Install mixing valve between the GARN unit and pump so that the pump draws through the valve from the GARN Note the position of the pump in the drawing below MIXING VALVE SET TO MAINTAIN MIXED CHECK VALVE WATER OF 95 F TO 130 F SUPPLY MANIFOLD FROM GARN UNIT UNDERFLOOR RADIANT TUBING TO GARN UNIT RETURN MANIFOLD CONNECTION TO AN EXISTING PRESSURIZED SYSTEM C CC s CC C In some instances the backup system will be an existing pressurized boiler Retrofitting a GARN WHS unit to an existing pressurized heating system will require the installation of a pressure rated flat plate heat exchanger Contact your local GARN dealer or DECTRA CORPORATION for sizing availability and pricing of FlatPlate heat exchangers Note the following and review the drawing below DO NOT connect any GARN unit to a steam boiler or steam heating system The water to water heat exchanger must have a pressure rating that is equal to or greater than the pressure rating of the existing boiler The heat exchanger shall be positioned on the return side of the existing boiler The GARN WHS unit and the heat exchanger shall NOT be installed so as to interfere with the normal delivery of heated water fr
40. be reproduced or transmitted in any form or by any means without the written permission of DECTRA CORPORATION GARN Installation Manual Rev11 Apr 2010 58 Important GARN Installation Guidelines Congratulations on your purchase of a GARN hydronic wood heating unit While the design and operation of the unit is very simple it contains several innovative and novel design elements that will impact how your system is designed SPECIAL DESIGN CONSIDERATIONS Before you finalize the design of your system be sure to read this manual and pay specific attention to the following items C NON PRESSURIZED WATER STORAGE This is a non pressurized water storage system and as such requires careful attention to o how pumps are sized where pumps are located in relation to the storage tank where pumps are located within the distribution system how pumps are controlled connection to an existing system Warning Do not directly connect to a system with glycol in it O O O O O PRESSURIZED EXHAUST FLUE The GARN unit uses a blower to provide efficient combustion and heat exchange This requires all flue connections to be sealed to prevent exhaust gases from entering an interior space C STORED HEAT The temperature of the water in the storage tank will vary depending on frequency of burning and the rate heat is removed from storage Your system should be sized for the LOWEST expected system water temperature The lower the system water t
41. concerning the installation of wood heating equipment Notice Follow all local and national codes The installation must comply with applicable sections of Canadian CSA Standard B365 or U S NFPA Standard 211 The design of the GARN Wood Fired Heat Storage Device is unique and is covered by one or more of the following patents United States Patents 4 401 101 and 4 549 526 Canadian Patents 1 163 880 and 1 220 686 B UNIT PLACEMENT All GARN WHS equipment must be placed in a sheltered enclosed space however it is not necessary for it to be a heated space When locating the GARN WHS unit consider the following carefully e Clearance to all combustibles must be in compliance with the listing and labeling A full 24 clearance is required between the left side of the door and nearest wall to the left of the unit in order to allow the fuel loading door to fully open s Traffic patterns past unit i e service door any overhead door pump locations etc Source of electrical power and location of electrical panel e The routing and insulation of piping to the heating system The vertical space requirements for access to the manway cover and anode rods on top of the unit Location of the wood fuel storage Unit position with regard to where heat is to be delivered i e distance to other buildings etc Sufficient space for heating system pumps and controls Position and type of flue horizontal o
42. ction against ground water inquisitive small animals and abrasion Extend the encasement pipe to a point about 6 above grade to prevent the intrusion of unwanted surface water In very cold climates place a sheet of 2 thick x 24 wide foam insulation blue pink yellow or green board immediately above the pipe centered on the pipe before back filling the trench Trench depth in cold climates should be 4 feet grade to top of pipe if possible Deeper burial and additional insulation is required when below grade piping extends beneath a parking lot or roadway frost will normally penetrate the soil to a greater depth in such areas Pressure test for water leaks before back filling the trench If the piping can only be positioned above frost depth provide a pump timer to circulate water for ten minutes every hour On the following page is a drawing of a typical underground pipe installation with pertinent details Note that the poly bag wrap is required only in location of continuously wet soils However it is always best to avoid such soil conditions if at all possible GARN Installation Manual Rev11 Apr 2010 33 MOUND SOIL TO OFFSET SETTLING CLAY CAP 50 x H gt 1 SIDE OF TRENCH i Q to BACKFILL WITH SITE MATERIALS eh LO 3 d u 2 THICK x 24 WIDE STYROFOAM SM BLUE BOARD OR EQUAL BACKFILL WITH CLEAN DRY SOIL OR SAND COMPACTED FIRMLY OPTI
43. d 3 550K firebrick pad 1 4 x 10 x 40 5 Installed Steel heat shield for lower nozzle with 1 4 insulation Installed VERTICAL EXHAUST rear cleanout cover insulation amp shield Installed OPTIONAL ITEMS as per Order ELECTRIC HEAT STORAGE ITEMS Electric Tank Fittings 9 Electric element box and cover 1 Electric element box gasket 1 Electric element box labels 2 240 vac single phase 5 5 KW immersion elements with O rings 9 maximum FLUE COMPONENTS 6 Class A flue 6 long 6 Class A flue 12 long 6 Class A flue 18 long 6 Class A flue 24 long 6 Class A flue 36 long Clamp rings Class A insulated Tee with bottom cap Wall support for Tee Roof flashing and storm collar Roof support 30 degree elbow Class A flue install manual ADDITIONAL ITEMS 4 flue cleaning brush 5 flue cleaning brush 36 long fiberglass cleaning rods Spare set of four 4 flat gaskets WARNING Non combustible steel supports must be provided to support the weight of the flue and tee for any horizontal flue that utilizes a tee GARN Installation Manual Rev11 Apr 2010 56 GARN WHS ETS MODELS 1350 1450 1500 1900 and 2000 NON PRESSURIZED WOOD FIRED HYDRONIC HEATER TESTED TO ANSIUL 391 UL 726 and CSA B366 1 M91 CAN CSA REPORT No 632 600901 April 17 1986 Electrical rating 120 VAC 15 Amps 60 Hertz 1 phase INSTALLATION Use only a solid fuel Cl
44. e to 1 5 gpm of flow at a maximum velocity of 4 per second through each baseboard e Individual room by room control is best If this is not possible try to zone the system so that rooms with similar heat loss characteristics are on the same circuit Whenever a zone thermostat calls for heat the pump serving that zone is to be activated New construction Determine the lineal footage of wall that is available for the placement of the hot water Divide the BTU HR heat loss of the building by the available footage Select the baseboard units that can supply the BTU s per foot required to meet the building s heat loss Select the baseboard based on a supply water temperature of 140 F Adding more baseboard selecting a more efficient baseboard or selecting a larger GARN unit maybe required it the available liner wall footage is not sufficient Converting an existing baseboard system Most installers select a GARN system that will supply 130 to 140 degree F water to a baseboard system If the existing system was supplying water at a higher temperature say 180 degrees an analysis must be done to determine whether a lower supply water temperature will meet the needs of the building The following table can be used for this purpose Water Temperature Correction Factors based on an entering air temperature of 65 F Average supply water temperature in degrees F 100 110 120 130 140 150 160 170 180 190 200 210 215 Correction factor 1
45. ectrician for additional grounding and stray voltage information 6 Every three 3 to five 5 years drain your GARN unit and heating system Check with local officials to ascertain the safety of draining the treated water onto the ground or into a city sewer system DO NOT DRAIN hot water allow it to cool to 75 F or lower water recently treated with biocide wait 4 to 6 months GARN water into a septic system it will overload the system and possibly destroy it Prevent animals from drinking the water simply allow it to be absorbed by the soil Before draining the unit draw a treated water sample and set it aside for testing if required Flush the tank with clean water Like the cooling system of a car all chemical suppliers recommend a periodic flushing of the system Hose down the entire inside of the tank Flush out any and all sludge that has accumulated in the bottom of the tank All dirt and sludge must be removed Inspect the cleaned tank This simple visual inspection is more informative than hundreds of lab tests Look for and identify any type of corrosion Save samples of any sludge and corrosion residuals Forward the water sample sludge sample and corrosion residual sample to your water treatment company Upon receipt of the test results adjust the chemical concentration as advised during refilling Depending upon the type of corrosion found check the tank ground building electrical ground and anode rods Clean all corro
46. ed with the varying temperature of water storage In cases when accidental over firing results in rapid boiling the manway cover is designed to rise slightly to relieve internal pressure and vent water vapor Correctly sized piping and pumps are necessary for the efficient and safe transport of heated water from the GARN WHS unit to the building heating system All piping pumps wiring and controls etc must be sized and installed by a qualified and licensed professional All items are to be installed in full compliance with all national state and local codes For installations not covered in this manual contact your local GARN dealer or DECTRA CORPORATION for design assistance General Piping Guidelines Size all above grade and underground piping per standard industry guidelines 1 Maximum head loss of 4 to 6 per 100 of pipe for energy conservation 2 Maximum velocity of 8 per second to minimize surface erosion potential in most pipes 3 Maximum velocity of 6 per second to limit noise Incorrect pipe sizing will adversely affect the heating system performance efficiency and cost of operation Undersized piping may cost less to install however the pump size must be increased adding significantly to the pump cost and the cost of operation Head loss data for a specific pipe or tubing and for various fittings is tabulated in manufacturer literature plumbing manuals state plumbing codes and local building codes A
47. emperature the more effective your storage becomes Many conventional heating components are marketed based on 180 F water temperatures Make sure your components are selected based on their performance with lower water temperatures C METHOD OF HEAT DISTRIBUTION Water based heat storage systems work well with all heat distribution options However the specific need for heat will suggest one type of distribution over another Properly sized radiant floor heating works exceptionally well with water based storage systems however the requirement for air filtration or conditioning may dictate the use of hot water coils in an air circulating system NOTE Heating coils should NOT be added to forced air systems that use a high efficiency furnace with plastic flue pipe Other design considerations may point to some form of radiator that uses the hot water directly Several different methods can be combined but care must be taken so they all work equally well with the temperature of water available C METHOD OF CONTROLS There are certain control designs that work best with a water based heat storage system Carefully read the entire manual for options that will work best for your application GOOD ENGINEERING PRACTICES Any heating system that circulates heated water from a heating device to its point of use can benefit from incorporating the following good design practices LC PROPER SIZING OF DISTRIBUTION PIPING Many times a smaller size pipe
48. equipment other than a conventional water heater The valve shall be set to deliver hot water at a temperature of 120 F maximum Install a differential thermostat to control the small 1 25 hp system pump The domestic water within the water heater should be heated to 145 F in order to kill water borne Legionelle bacteria The hot sensor of the control should measure the GARN water temperature the cold sensor should measure the domestic water temperature at the inlet of the heat exchanger The sensors may be strapped to the pipe and covered with insulation in order to provide accurate temperature readings to the differential controller GARN Installation Manual Rev11 Apr 2010 46 TO PLUMBING FIXTURES s COLD WATER ANTI SCALD VALVE SUPPI Y SET AT 120 F MAXIMUM HEAT EXCHANGER DOMESTIC WATER HEATER HEAT DISTRIBUTION All GARN WHS equipment is factory ready to connect to solar collectors The collector with the simplest interface is the drain back solar collector Water is pumped from the GARN unit to the collector is circulated through the collector then drained back into GARN unit via gravity An NPT flanged fitting on the left side of the manway collar is the drain back fitting where the return line from the collectors is to be connected Some solar collector designs utilize a collector non water based medium in lieu of water Such collectors require a heat
49. es 8 to 15 BTUH sq ft of above grade floor area Insulated heated basements 8 to 12 BTUH sq ft of below grade floor area Residential Ventilation In newer tighter energy efficient houses mechanical ventilation is required at a generally accepted rate of 15 cfm per person This calculates to about 6 800 BTUH if an energy recovery device is NOT used and 3 000 BTUH if an energy recovery device is installed This should be added to the heat loss figure for newer houses but not added to the heat loss figures of older houses Residential Domestic Water Heating For a normal family of 4 in a modest house generally 40 000 BTUH of heating will provide a reasonable recovery rate when used with a 50 to 75 gallon water heater For a larger family in a larger house it is recommended that a recovery rate of 75 000 BTUH be used coupled with a larger 100 to 120 gallon water heater Maximum delivered water temperature must be 120 F or less thus an anti scald valve is required by most codes on the discharge of the water heater Maintain the water heater at 140 F or higher to kill bacteria and virus Hot Tub Heating Small 7 to 10 square x 4 deep insulated outdoor hot tubes with an insulated cover generally require only 2 000 to 2 500 BTUH maintain temperature when the tub is covered at OD temperatures of 20F It is assumed that the hot tub is used for brief periods say 1 to 2 hours per day during which time the evaporative co
50. g both system performance and corrosion DO NOT use automatic air bleeds in the heat delivery system Install only manual air bleeds Select pump to overcome total head i e pipe friction and vertical elevation Pump sizing is very critical in this application e Install a solenoid valve that is energized to open when the pump is powered This valve is to close whenever the pump is not powered The valve locks the water in vertical loop when the pump is not operating Install a reliable full port spring check valve down stream of the pump a MANUAL AIR BLEED CHECK SYSTEM PUMP FROM GARN UNIT IST LEVEL TO GARN UNIT SOLENOID VALVE GARN Installation Manual Rev11 Apr 2010 45 DOMESTIC HOT WATER CONNECTION The preheating or heating of domestic water is easily accomplished with GARN equipment However in tank copper water heating coils are NOT provided within the GARN tank for several reasons A copper coil within any steel boiler induces electrolytic corrosion leading to early tank failures With a coil inside a remote boiler two additional below grade insulated domestic water lines are required a supply and return line that connects the coil to the water heater This adds significant cost to the project Because of non turbulent flow conditions the tank mounted heat exchanger is significantly larger more expensive that a heat excha
51. g self tapping SS screws are to be driven thru the flue flange into the tank mounted receiving flange to prevent separation of the flue Strictly follow DuraTech s installation instructions A 2 inch clearance must be maintained between the Class A flue and any combustible material however non combustible insulation may be in direct contact with the outside surface of the flue if passing through a non combustible material Once outside the building the flue may be terminated either horizontally or vertically see below GARN WHS 1350 1450 1500 1900 and 2000 models utilize a 6 diameter flue Shown below is the Flue Warning label that is placed on every GARN WHS unit near the DuraTech brand Class A flue exhaust connection FLUE WARNING Use only DuraTech brand Class A 2100 F HT flue and accessories All other brands or types of flue will not safely connect to the GARN unit and will void the 1TS Warnock Hersey listing Refer to the Installation Manual and flue manufacturer s instructions for flue installation details E EXHAUST FLUE INSTALLATION Flue Gas Discharge Clearances As with any wood heating device sparks may be occasionally expelled from the flue of GARN WHS equipment therefore it is important to comply with the following requirements Flue gas discharge clearances are defined in NFPA 211 national and state codes The following is a partial summary of those codes as they apply to GARN WHS equipment Flue gas
52. h 162 Recommended wood diameter 4 to 10 34 000 Ibs 3 200 gallons 3 4 HP 115 VAC 12 amps 10 dia DuraTech Class A 8 dia screened hood 49 firebrick bottom 40 32 5 950 000 fuel dependent Approx BTU s degree of water temperature change 26 700 Figures based on split 24 oak with 15 moisture and reloading once hour MATERIAL SPECIFICATIONS Tank shell mild steel MS Minimum 3 16 Front and back heads MS 1 4 t Recommended wood length 24 to 32 6 500 Ibs 1 4 3 16 12 GA 16 GA Inner 304 Stainless Steel 16 GA Element box MS 3 16 Skids MS 3 16 Welded Steel Boiler Tube All welding conforms to AWS specifications All seams joints etc exposed to water are welded to prevent crevice corrosion GARN Installation Manual Rev11 Apr 2010 54 GARN PACKING LIST FOR MODEL WHS 1500 2000 ORDER NUMBER SHIP DATE SERIAL NUMBER CPW LISTING NUMBER SHIP TO STREET ADDRESS CITY STATE ZIP PACKAGED IN COMBUSTION CHAMBER GARN Unpacking Manual w shipping list GARNg Installation Manual GARN Operation amp Maintenance Manual GARN WHS ETS Controller Water temperature thermometer 50 F to 300 F Exhaust temperature thermometer 100 F to 800 F GARN WHS Standard Sensor stem float switch only with plastic fitting and nut GARN W ETS Upgrade Sensor stem float switch and stats 1 with plastic fitting and nut Motor mounting plate with gasket
53. he chemical program will closely monitor the dissolved solid concentration that can have potential harmful effects to the GARN WHS unit and system components Dispersant additives or WHS draining may be necessary to keep the system clean efficient and corrosion free PrecisionChem Water Treatment W7231 State Road 49 Waupun WI 53963 Phone 1 920 382 6498 WATER FILTER INSTRUCTIONS Connect the water filter to a standard garden hose with a brass fitting MPT to hose thread Use the filter and hose to fill the unit to a water depth of approximately 12 Add the water treatment chemicals and then continue to add filtered clean water until the GARN unit is full water surface is 4 below the crown at the top of the tank The above procedures are most easily accomplished through the manway on top of the tank Whenever additional water is added to the unit utilize this filter so that sediment is not carried into the system Replacement 5 micron filter elements are available from DECTRA 1 612 781 3585 GARN Installation Manual Rev11 Apr 2010 23 INITIAL WATER TREATMENT INSTALLATION PROCEDURES 1 Upon delivery of a GARN WHS unit cover the manway access to prevent the unwanted entrance of dirt debris and water Inspect the unit and notify the delivery driver and your GARN dealer of any problems Install the unit in full compliance with all federal state and local codes and this Installation Manual Do not insu
54. he pump based upon a calculated system head loss and system flow requirement do NOT guess All pumps shall be installed in strict compliance with manufacturers instructions with particular attention to shaft orientation and the length of straight run of inlet and discharge pipe required to produce stated performance In most cases install pumps to discharge vertically up or horizontally Provide isolation full port ball valves and flanges on the inlet and discharge of the pump Pumps should be located adjacent to the GARN WHS unit if at all possible Mount pumps at least 3 below the surface of the GARN WHS water level in order to prevent suction boiling at the pump inlet at higher water temperatures See previous section Calculation of Net Positive Suction Head For Pumps A heating system may use several zones within a building Likewise one GARN WHS unit may supply heat to several buildings Use individual pumps with check values for each zone or building and develop a common supply manifold to feed the pumps Likewise provide a common return manifold DO NOT install manifold piping to produce a bull headed tee condition In a remote location zone pumps may be mounted adjacent to the heating system PROVIDED the total head loss static and frictional of the supply pipe is equal to or less than 3 feet and the pump is mounted at least 6 below the surface of the GARN WHS water level Again this is necessary to prevent suction bo
55. her NOTICE The air intake should be at least 12 inches lower than the exhaust vent if both terminate on the same surface or 24 inches lower than the exhaust vent if exhaust is not terminated on the same surface Nir Intake L Vi Metal Container With Sand N r Je SL E EE Maximum of 2 90 deg Elbows on Air Intake Operating the GARN WHS unit without an inlet hood or without the specified inlet hood will significantly decrease airflow into the unit resulting in inefficiency and the creation of creosote GARN Installation Manual Rev11 Apr 2010 10 D EXHAUST FLUE SELECTION DO NOT CONNECT THE GARN WHS PRESSURIZED FLUE TO A CHIMNEY FLUE THAT SERVES ANOTHER APPLIANCE The GARN WHS unit can be purchased with either a rear horizontal flue connection or a top vertical flue connection Both come with a DuraTech brand Class A flue connector DuraTech Class A 2100 F HT stainless steel flue sections are affixed to this connector to carry away the flue gases NO other flue _ brand size or material is to be connected to GARN WHS unit The flue gases coming from the Draft Inducer are pressurized This means that all joints both inside and outside of the building must be caulked with silicone caulk and or sealed with self adhesive aluminum tape The first section connected to the back of the GARN WHS unit MUST BE SILICON SEALED TO THE CONNECTOR and TANK In addition three 10 x 3 2 long self drillin
56. ibution Systems pg s 39 47 Check out and start up procedures pg s 48 50 Specifications pg s 51 54 Packing Slip pg s 55 56 Copy of the Listing Label pg s 57 eg es Sp m P Bo PRS o Terms and Conditions with Warrantee Information pg s 58 SAVE THIS MANUAL FOR FUTURE REFERENCE DECTRA CORPORATION 3425 33 Avenue Northeast St Anthony Minnesota 55418 Phone 612 781 3585 Fax 612 781 4236 Web Site www garn com Copyright 2002 2010 by DECTRA CORPORATION rights reserved No part of the contents of this manual may be reproduced or transmitted in any form or by any means without the written permission of DECTRA CORPORATION GARNg Installation Manual Rev11 Apr 2010 2 A CODES AND INSURANCE The GARN WHS Wood Heat Storage system is a direct vented wood burning appliance that stores heat in a NON PRESSURIZED vessel It is listed by ITS Warnock Hersey Testing Laboratory Madison Wisconsin according to CSA standard B366 1 M91 and ETML 78 1 It is to be installed according to this manual the Unpacking and Assembly Manual Federal State and local codes and your insurance underwriter s guidelines Local building and fire inspectors are given discretion to determine if construction and heating installations are safe They use recommended guidelines developed by various national organizations such as NFPA National Fire Protection Association Your insurance company may also have specific guidelines
57. iling at the pump inlet See previous section Calculation of Net Positive Suction Head For Pumps Do not select a pump to operate near the top of its pump curve as cycling flow may occur with resultant damage to the pump and substandard system heating performance In an existing system the pump size must be confirmed as adequate for the modified system Under sizing a pump will significantly reduce the performance of the heating system and may allow system piping to freeze Refer to the drawings on the next page for general schematics associated with a single GARN WHS unit heating a single building containing either a single zone system or a multiple zone system GARN Installation Manual Rev11 Apr 2010 35 Typical Single Zone System L GN SHUT OFF VALVE TYPICAL FROM HEATING SYSTEM o SUPPLY TN HEATING SYSTEM O 7 l 4 RETURN O DIELECTRIC FITTING TYPICAL Typical Multiple Zone System SUPPLY FROM GARN UNIT DO NOT USE A BULL HEADED TEE WHERE THE LOAD RETURNS RETURN TO GARN UNIT GARN Installation Manual Rev11 Apr 2010 36 Another pump piping strategy that can allow for a better control smaller pumps and fewer design calculations is as follows refer to the drawing on the following page This drawing details a single GARN WHS unit providing heat to two separate buildings a home and a shop This type of system is termed a primary secondary pip
58. ing loop One could further increase the energy efficiency of this system by utilizing variable speed pumps for P1 and P3 The speed of the pumps would be controlled by an optional temperature sensor or even an indoor outdoor reset temperature controller Thus whenever the GARN WHS unit was hot say 195F P1 and P2 would run very slowly as only a small volume of hot GARN WHS water would be required to warm the water within the secondary piping loop When the GARN WHS unit was cool say 125F the pumps would provide a greater flow to warm the water within the secondary piping loop Some specifics about the closely spaced tees e The tees should be no more than 12 apart and the pipe section between the two tees should be fabricated from pipe one to two sizes larger than the secondary system pipe e The tees should be located on the return side of any hot water heating system Flow between the tees may reverse direction when the secondary system pumps P2 and P4 are activated The piping reducers are beyond the 12 of pipe and the two tees e Activation of P1 and P3 may be interlocked with P2 and P4 except when there is a possibility of the underground piping freezing GARN Installation Manual Rev 1 Apr 2010 37 gDSN3S VNDI LaD CIVIIdA 1 Lige 81 u rel 039Yd S331 913 WOO Mi NQILYIGY 3801 G ANNI4 J003 LNvidva CHECK d77m0 28 DNIdId X3d 3331I 33 8 N3DAXD ND10D5330N0D
59. ing sampled before collecting the final sample to be submitted Every water treatment sample must be tested for at least the following residual chemical concentration for each chemical additive conductivity pH total dissolved solids total iron copper as Cu and the concentration of bacteria including both iron reducing and sulfur reducing strains if bacteria tests positive in the sample Upon receipt of the test results adjust the chemical concentration as advised by the water treatment supplier GARN Installation Manual Rev11 Apr 2010 24 MAINTENANCE PROCEDURES TO MINIMIZE CORROSION POTENTIAL Water treatment chemicals are consumed in the process of providing corrosion protection The bottom of the GARN unit should be visible through the full water depth in the tank One of the major features of GARN WHS and ETS product is the manway access on the top of the tank Its benefit is the ease with which GARN products can be inspected and repaired if necessary 1 Examine the water in the GARN unit several times per year If clarity changes deposits or corrosion is noticed immediately take a sample and forward it to the water treatment company Upon receipt of the test results adjust the chemical concentration as advised by the water treatment company 2 At the end of each heating season top the tank off Whenever additional water is added to the unit utilize the water filter provided so that sediment is not carried into
60. ing system Note the following Pumps Pl and P3 circulate water from the GARN WHS unit to a pair of closely spaced tees within each building and then back to the GARN WHS unit The two pumps are sized based upon the head loss of the underground piping and the manifolds at the GARN WHS unit The head loss for the piping within either building is NOT taken into account This makes for simpler piping head loss calculations when interfacing with an existing system The underground piping and the GARN manifold are considered the primary piping loop Pumps P2 and P4 simply circulate warm water a mixture of cool system return water and hot GARN WHS water to the heat delivery system within the building The two pumps are sized based upon the piping and equipment head losses within the building without taking into account the head loss of the underground piping or the manifold at the GARN WHS unit This allows a good match between pumps P2 and P4 and the heat delivery equipment air coil hot water baseboard radiant floor or any combination thereof In fact multiple small pumps may be used to split the building into independently controlled heating zones Again this makes for simpler piping head loss calculations when interfacing with an existing system because the existing pump generally does not have to be replaced as it experiences no net change in its resistance to flow This piping within the building is considered the secondary pip
61. l unduly restrict the flow of exhaust gas due to increased back pressure Restricted exhaust gas flow will decrease overall efficiency and may create a creosote condition within the GARN unit GARNB Installation Manual Rev11 Apr 2010 15 G ADDITIONAL COMMENTS If burned correctly wood is a wonderful rural fuel that unlike coal or fuel oil is carbon neutral Carbon neutral means that if wood is combusted properly it produces the exact amount of carbon dioxide required to grow another tree equal to the tree that was either burned or allowed to rot on the forest floor Wood is generally not recommended as a primary fuel for housing In most suburban locations In most city locations To heat an outdoor swimming pool during the summer months To heat domestic water Solar heating is a better as a primary heat source Improperly combusted wood fuel produces emissions that are toxic to humans and animals These emissions include but are not limited to finely atomized liquid oils creosote very fine particulates aromatic hydrocarbons polycyclic organic matter carbon dioxide carbon monoxide etc Most of these are easily drawn into one s lungs during normal breathing However complete combustion can reduce these by products significantly as most of these chemicals are fuels Population densities in suburban and urban locations create significant local air shed pollution issues that essentially and reasonably
62. late the unit until it has operated successfully for a few days PROPER CONNECTIONS AND GROUNDING 3 Properly ground the GARN WHS unit to help avoid electrolytic corrosion due to a floating ground DO NOT USE THE STEEL CONDUIT AS A GROUND CONDUCTOR The National Electric Code requires the utilization of a dedicated green electrical ground wire when connecting the unit to the service panel ground An additional driven ground rod may be required to help establish proper grounding your licensed electrician can advise you on this Do not install a copper domestic water heating coil within the tank as this may cause corrosion of the steel shell Attach only non galvanized black steel pipe to the GARN unit If copper pipe is being used please refer to item 6 below Maintain 4 to 6 of non galvanized black steel pipe between the GARN unit and any copper pipe install dielectric couplings where copper pipe connects to steel pipe All piping should be flushed with the GARN unit when the pre flush is being done PROPER CLEANING AND FLUSHING de bug leaks with plain water 7 Remove any internal accumulated dirt from manufacturing trucking or on site construction and thoroughly flush wash the entire inside of the tank with PreCln 775 and clean filtered water Drain all water and dirt Visually inspect the interior of the tank from the manway without climbing into the tank to ascertain that the unit is OK to be filled with
63. metal for all wall surfaces DO NOT USE WOOD PLYWOOD PARTICLE BOARD ORIENTED STRAND BOARD ETC Minimum clearances between any surface and the GARN WHS unit are Rear 2 8 recommended for pipe clearance Sides and top 2 Draft inducer housing 2 Front 60 allows for door swing and loading Class A flue 2 MAINTAIN A CLEAR AND CLEAN 60 MINIMUM DISTANCE THE FULL WIDTH OF THE GARN UNIT IN FRONT OF THE GARN UNIT DO NOT STORE COMBUSTIBLE MATERIALS INCLUDING MATCHES PAPER KINDLING WOOD OIL GASOLINE RAGS CLOTHING ETC WITHIN THIS AREA OR ABOVE THE GARN UNIT DO NOT ALLOW THE ACCUMULATION OF BARK SAWDUST SHAVINGS KINDLING ETC WITHIN THIS AREA Construct the insulation enclosure around the GARN WHS unit utilizing 3 x 1 5 8 x 18 gauge galvanized steel studs and 5 8 sheetrock Install per stud manufacturer s directions Tape all joints after the sheetrock is securely fastened into final position 1 Utilize a layer of tarpaper between the concrete floor and the bottom steel stud plate to minimize possible corrosion of the bottom plate Use power driven fasteners to attach the plate to the floor At the front of the unit the sheetrock is to be cut around the air collar draft inducer housing and electric element box Maintain a dimension of 4 from the surface of the tank to the exposed exterior surface of the sheetrock This will allow the sheetrock to slip behind the 2 steel flange that surrounds
64. mum 6 diameter stainless steel liner It must be surrounded with fireproof insulation and it must be no taller than 24 feet The maximum total static pressure loss in the vertical portion of the existing flue must not exceed 10 of water column at a flow rate of 375 CFM ONLY STAINLESS STEEL LINER COMPONENTS ARE TO BE USED The performance of the GARN WHS unit can be seriously hampered by an improper connection to a or an improperly constructed masonry chimney and a DEADLY condition may result Existing chimneys must be inspected and certified safe for use as a pressurized chimney by a licensed Professional Engineer or licensed chimney specialist In addition the installation must comply with all state and local codes If the GARN WHS unit is located within a recessed area such as a basement a carbon monoxide detector mounted close to the floor is required CAUTION In any flue configuration failure to seal ALL flue joints inside a building WILL result in harmful levels of carbon monoxide and carbon dioxide being introduced into the space If strong smell of wood smoke is noticed LEAVE THE ROOM AND VENTILATE THE SPACE IMMEDIATELY Support all flue components to ensure structural integrity during the life of the flue Use only non combustible i e steel aluminum etc materials for such supports and generally follow flue manufacturer s recommendation F FLUE CAPS DO NOT INSTALL A FLUE CAP on a vertical chimney as the cap wil
65. nger mounted close to the water heater The two methods of preheating domestic water include an external saddle mounted heat exchanger and a stand alone indirect fired tank heat exchanger A double walled leak detected tube within a tube all copper water to water heat exchanger is the recommended saddle type heat exchanger This heat exchanger is to be mounted external of close to and slightly below the level of the top of the existing water heater Saddle heat exchangers can be installed to thermo siphon or use a pump on the domestic waterside Indirect fired tank heat exchangers generally include a stainless steel internal coil within an insulated stainless steel tank This unit is then connected in series upstream of the existing water heater Contact your local GARN dealer or DECTRA CORPORATION for sizing availability and pricing of either preheat unit Please carefully review the following as it applies to ANY domestic water heating system All domestic water piping valves fittings pumps controls and the overall installation must meet all national and state plumbing sanitation and health codes After installation is complete the entire domestic waterside of the system must be pressure tested flushed and then sanitized according to local health department requirements In all cases a NSF or Board Certified anti scald mixing valve is required by national and state codes when preheating or heating domestic water with
66. nstallation Manual Rev11 Apr 2010 5 NOILVeOdY0D a oe MOOG WR AOINE iT TN jem ot SEIT YJLNJ2 A933N3 L V SHM 61 0 9 X004 SALON NOILONYLSNOO gO4 Ce 133HS 33S A HLOIM Oe ONIdid SMH 8 f SSV19 HUT JI M dOOO GILAINSNI 0 La WWOldAL Wei ONY vie OL Ess A138n23S AZYOHONV 1504 Q3LV3YL 3JYNSS3Yd Xr SQYOD JOVYOLS GOOM JX HNVW JOOV WOIdAL 1004 Nad 241 1Y a HINOS OL AVIS jo NOIWLYOd YOIW3LX3 H lld JQVYD 3408Y 0 Q31V901 GQOOH YSHLVIM Q3JN3JJY S E ONY ZV LV QOOH IJIN ag aJ 1VL30 SV SNIQ108 3LOW3Y NOILSNEWNOD VIC TWWS V NIHLIM YO 307134 WOLY3SA YO WILINOZIYOH V SSV19 HOILVYNG VIC 9 Q3LV3H 38 OL ONIQUAG JHL NIHLIM Q31V901 38 AVA SHM Nav JHL GARN Installation Manual Rev11 Apr 2010 6 NOILYNOdNO WET artit TEE e aarne Aer OWT C YSJLNSO A933N3 SHM OO6L OSPL NYVD NOILVAS13 15 3 DIS JO dOl GOOH aw A NOILSNENOD VIC 3M4 YOXA YO IWLNOZINDH v Sei Jr HOBWHNG YIO 9 Q13IHS WM MOGNIM ONIYV38 1 8 JOOX HOLId L 8 S3LON NOILONYLSNOD CY 133HS 33S LN3A 14405 SNONNILNOD 3230 JOON 20 2014 70NT ONY ONIHIVSHS N33A138 dV9 ag 1 SNONNILNOD NIVLINIVW NOIVINSNI LIVE 9 22018 SNONNILNOD 5 1Y YVTIOD JIL 8xz ca X930 2008 GOOMAId
67. nstalled e Any water air coil added to the system must be installed in accordance with the instructions of the manufacturer and in a manner acceptable to the regulatory authority by mechanics experienced in such services Coil Selection Check the nameplate on existing heating system for BTU HR output blower CFM and allowable external static pressure Measure the external static pressure with a clean filter in position e Choose coil based upon desired BTU HR output and LOWEST entering water temperature usually 110 130 degree STORAGE water temperature e Choose circulating pump based upon required water flow and total system pressure drop Determine if EXISTING furnace blower is adequate If NOT adequate and furnace is in GOOD condition replace blower assembly or blower motor and outlays to yield proper flows It NOT adequate and furnace is in POOR condition replace the furnace with a new furnace of proper blower capacity Or replace the furnace with a package fan coil unit If the furnace is adequate and in good condition install the coil DONOT INSTALL A COIL IN A SYSTEM THAT UTILIZES A HIGH EFFICIENCY OR CONDENSING FURNACE Call your local GARN dealer or DECTRA CORPORATION if you do not have a source for coils High Limit Switch If the coil is placed on the return airside a high limit switch located on the downstream side of the coil provides overheating protection for the blower motor If the temperature of
68. od shingles cedar shakes etc due to fire hazard If chimney is under a large tree due to fire potential in fall power exhaust with dried leaves Horizontal Sidewall Flue The flue extends horizontally through the wall using the DuraTech brand Wall Radiation Shield to maintain safe clearances to combustibles The end of the flue should terminate no closer than 18 from building siding A single wall 6 diameter adjustable stainless steel elbow is fitted onto the end of the flue The elbow is screwed onto the class A flue and diverts the flue gases downward at an approximate angle of 45 90 degrees Run a bead of Hi Temp Silicon around the elbow where it contacts the Class A flue to prevent separation A mesh screen is to be installed on the end of the elbow as a spark arrester and animal barrier This exhaust screen is to be checked prior to start up each season and for freeze over periodically during cold weather A METAL CONTAINER partially filled with sand should be placed below the angled stainless steel elbow to catch any fly ash or sparks that may exit the exhaust The container should be at least 2 feet laterally from any combustible surface and 6 feet from any combustible surface above it DO NOT USE A PLASTIC CONTAINER Fasten a 1 2 to mesh wire screen over the top of the container to prevent the entrance of dry leaves animals birds etc into the container Delete the screen where the flue enters the con
69. oling of the waters surface is the primary heat loss and may equal 6 000 to 9 000 BTUH Hence any heat exchanger used to heat a hot tub should be sized for this larger value GARN Installation Manual Rev11 Apr 2010 26 Radiant Floor Heating Maximum flow for 4 PEX tubing is 5 8 gpm maximum length of individual tube is 300 and maximum number of tubes per mini manifold is 8 assumes 100 water Maximum flow for 5 8 PEX tubing is 1 gpm maximum length of individual tube is 450 and maximum number of tubes per standard manifold is 12 assumes 100 water Normal temperature drop is 10F to 20F per tube length and try not to exceed a floor surface temperature of 85F comfort and finish materials limitations Always insulate beneath a radiant floor system whether on or above grade Forced Air Heating Size a coil that increases the air side pressure drop by only 25 to 33 WC Increase blower RPM to offset this increased static pressure and maintain CFM Also select a coil that will provide a supply air temperature of 110F or slightly greater Code limit is 140F Pipe all coils in a counter flow pattern The normal range of water temperature drop through a coil is 8 F to 20F In almost all cases the coil will be physically larger than the existing supply air plenum thus the plenum size will have to be increased Unless specifically approved by the furnace manufacturer do not mount a hot water coil on
70. om the existing boiler The GARN WHS unit and the heat exchanger SHALL BE installed without changing the function of the controls or rewiring the existing boiler A control wiring connection is permitted only if required to obtain proper operation For instance when a thermostat calls for heat both the GARN pump and the existing pump are to be powered The electrical system of the existing boiler and GARN unit shall be powered from a single branch circuit without exception The drawing on the next page is a schematic representation of connection to an existing pressurized system GARNB Installation Manual Rev11 Apr 2010 44 CHECK VALVE EXISTING BOILER FROM GARN UNIT TO GARN UNIT PUMP FLAT PLATE HEAT EXCHANGER Even though the GARN WHS unit is non pressurized it is adaptable to heating systems that are elevated up to 24 above the level of the slab on which the GARN unit sets If the vertical distance is greater than this a flat plate water to water heat exchanger must be installed refer to Connection to an Existing Pressure System Note the following and review the drawing below This type of system is found mostly in warehouses with high ceilings and in multiple floor residences or small commercial facilities All piping and flanges MUST be airtight or this type of installation will not function properly Air leaks will constantly bleed air into the system negatively affectin
71. or to ceiling and for the full length of the addition There must be NO DIRECT CONNECTION OR PASSAGEWAY i e no window or personnel door between the garage and the lean to One possible floor plan is shown below ONE HOUR FIRE RATEO WALL DIMENSIONS WHS 1460 16 2 TS __ whs 4500 j G ___ 9 3 WHS 200 ggf mat O O WHS 2100 TI ag TU 1 O EXISTING HOUSE EXISTING GARAGE GARN Installation Manual Rev11 Apr 2010 4 Remote Building Location Units may be installed in either heated or unheated buildings such as pole barns sheds or shops The unit must be completely sheltered with enough room in front of it for fuel loading periodic maintenance and clearance to combustibles Schematic plans for a stand alone remote GARN BARN Energy Center have been included on the next two pages The plans are one suggestion as to how to enclose your unit The GARN BARN provides an attractive shelter that allows one to correctly store 4 full cords of fuel wood under a protective roof facing south to allow solar drying of the wood fuel It also allows the unit to be fueled without being exposed to bitterly cold winter weather and provides a safe location for pumps and controls Slab Recommendations The GARN WHS unit must be set on a concrete slab on grade The tables below provide data regarding skid pressures and standard allowable soil bearing capacities Skid pressure applied by e
72. oth sides of the coil Refer to following three 3 diagrams Connect draft gauge The zero end of the draft gauge scale connects to the air entering side Insert the hoses so about 1 4 extends inside the plenum Seal around holes with permagum Start furnace blower motor by placing thermostat fan switch in continuous position with no heating or cooling demand Turn on power Refer to the manufacturer s literature for the list of air volumes and equivalent draft gauge readings Observe draft gauge reading if reading is below required air volume increase blower speed however if reading is above required air volume decrease blower speed Refer to furnace wiring diagram for changing direct drive blower speed On belt drive blowers check amperage draw on motor by connecting an ammeter to one leg of the motor supply line and comparing this reading with the full load amps listed on the motor nameplate The motor pulley must be adjusted not to exceed the motor nameplate full load amps for motor installed After required draft gauge readings are obtained remove draft lines and insert snap hole plugs in air test holes Pa lt Supply Duoctstat s Sos S Filter MERR A Air Test pS Holes 4 Coil on return side of furnace Coil on the discharge side of the furnace GARNg Installation Manual Rev11 Apr 2010 40 CAM STATE UHC 140L4 DUCTSTAT 140 F OPEN 100 F CLOSED ADAPT PLEN
73. preclude the use of coal wood and even some oil fuels even if combustion is mostly complete Housing in such locations must do the following in order to help curb the concentration of unwanted emissions Conserve energy by installing good insulation and caulking Install only double glazed argon filled energy efficient windows Install insulated thermally efficient doors and storm doors with good quality weather stripping Install an air to air heat exchanger to provide ventilation This uses the building s exhaust air to pre heat the in coming ventilation air Insulate and caulk all rims joists Insulate basements walls from floor to ceiling with methods that prevent the formation of mold and mildew e Utilize passive solar techniques whenever possible Install water saving toilets showers and faucets through out the residence e Utilize a high efficiency natural gas condensing furnace or boiler to provide space and domestic water heating Install only high SEER air conditioning equipment with variable speed fans to effectively control indoor relative humidity The above items alone or as a group will reduce fuel usage and yearly fuel costs At the same time they create a very comfortable healthy housing unit for the occupants as well as a healthier local air shed And the above items will provide the user a reasonably quick return on his her energy investment dollar Not only because of the fuel savings but al
74. priate ceiling and roof shield on vertical installations Install all flue components in strict compliance with manufacturer s manual Because the GARN WHS unit utilizes an induced draft combustion blower a vacuum relief duct is required Thus a vertical 4 x 14 sheet metal duct is installed along the north wall refer to drawing A 1 within the insulation The outdoor portion consists of a screened weather hood positioned 36 above grade The top of the duct is open ended and terminates above the insulation that surrounds the GARN unit The upper end may also be screened No damper is required GARN Installation Manual Rev11 Apr 2010 8 2 lt x mx Q Dectra 3425 JMO AC ME SI ANTHONY 55418 612 781 3585 __ GARN WHS ENERGY CENTER Dectra Corporation C COMBUSTION AIR INLET INSTALLATION As a direct vented appliance the GARN WHS unit complies with NFPA 211 that states in section 6 6 1 1 Direct vent appliances shall be listed and shall be installed in accordance with their listing and the manufacturer s instructions Refer to NFPA sections 6 3 5 and 6 6 1 2 Venting recommendations are discussed in section E The drawing below shows the location of the various fittings on the rear head of the unit Specifically note the location of the combustion air inlet connection and the Class A flue connection as these will be discussed in the following paragraphs
75. r the chemicals added to reduce corrosion potential nor the level or frequency of ongoing chemical testing and maintenance Therefore corrosion protection is the_sole responsibility of the owner To this end it is strongly suggested that every owner become a proactive participant in the protection of their investment and fully use this program There is no warrantee regarding corrosion or corrosion induced failures of any component of GARN WHS ETS or WHS ETS equipment or any components attached to the GARN equipment Dectra Corporation is recommending the program offered by PrecisionChem Water Treatment of Waupun WI They provide a comprehensive product line and individualized services for GARN WHS ETS customers Initial chemicals will be shipped to the new owner from the chemical supplier after they have tested the fill water sample you have mailed in The PrecisionChem Water Treatment products and services are fully compatible with previously Dectra Corporation approved products and services ONGOING WATER TREATMENT PROGRAM Be sure use and maintain the supplied water filter when filling or adding water The GARN WHS water will be professionally tested biannually by PrecisionChem Water Treatment to ensure proper and appropriate monitoring Full participation is vital to the system s protection Twice a year you will receive a card reminding you to send a water sample in with the sample bottle shipped with your last chemicals or test
76. r vertical with reference to other nearby buildings CAUTION If unit is located within 10 feet all models of an 8 foot deep basement wall this wall will need to be reinforced in order to prevent collapse of wall due to total weight of the GARN WHS unit plus water Check with your local code official if you have any questions concerning proper placement of the unit Clearance to Combustibles Unit must be placed on a non combustible floor Clearances to combustibles are listed below The clearances shown are minimum clearances and must be adhered to during installation GARN Installation Manual Rev11 Apr 2010 3 Rear 2 6 to 8 recommended for pipe clearance Sides and top 2 Draft inducer housing A Front 60 allows for door swing and loading Class A flue 2 Garage Location State and local codes do not allow propane oil or solid fuel appliances to be located in a garage Propane and gasoline fumes are heavier than air thus settle on the floor of any garage and mix with the oxygen in the garage One spark from an electronic igniter or one hot ash from any wood unit could explosively ignite the fumes causing extensive property damage personal injury or death Therefore locate the GARN WHS unit outside the garage within a lean to type of addition to the garage Provide a fully sealed 1 hour fire rated 5 8 sheetrock wall between the lean to and the garage Firewall must extend from flo
77. ram can prevent this form of corrosion Connect only non galvanized steel pipe to GARN WHS and ETS units and install dielectric couplings where copper pipe connects to steel pipe Sacrificial anode rods further help reduce the potential for this type of corrosion refer to Appearance section below Appearance of corrosion blisters formed by bacteriological action will have either a shiny dime color or charcoal color underneath with a slimy substance within the blister Oxygen pits are characterized by a black powder inside a blister Corrosion underneath sludge may be of either type Shiny dime colored pitting especially in the vicinity of a tank discontinuity or pipe fitting is generally electrolysis GARN Installation Manual Rev11 Apr 2010 21 WARNING CONNECTING TO AN EXISTING OR GLYCOL TREATED DISTRIBUTION SYSTEM WARNING Do NOT connect your GARN WHS or ETS unit to an old dirty or glycol treated existing hydronic system until the existing system has be thoroughly cleaned and flushed Conventional hydronic distribution systems with a steel or cast iron boiler cast iron radiators copper hot water baseboard or water to air coils may contain a sludge or solution that can attack the steel in your GARN heat storage system Over time bacteria debris and or glycol can transform into this very corrosive sludge solution This liquid SHOULD NOT BE MIXED with the GARN storage water Rather the existing system MUST be completely
78. red on a regular basis to detect any changes Under deposit corrosion occurs under any material that prevents water treatment chemicals from plating a bare steel surface This will occur under sludge that may form on the floor of the tank or other horizontal surfaces Note any corrosion refer to Appearance section below and wire brush or sand blast to bare steel Recently manufactured equipment has an epoxy coated floor to help minimize this problem Bacteriological corrosion discussed in detail above Refer to Appearance section below Blisters over pits is pitting type corrosion and it is not always apparent what causes this to occur at a particular location Note any corrosion refer to Appearance section below and wire brush or sand blast to bare steel Crevice corrosion essentially a form of under deposit corrosion Occurs where two pieces of steel lie against each other but are not welded together effectively preventing water treatment chemicals from plating the adjacent bare steel surfaces Does not occur in GARN equipment as all internal joints are seal welded This condition cannot be visually inspected as the steel surfaces lie very close together Electrolysis results from a noble metal i e copper bronze brass etc in close proximity to steel a sacrificial material It can also result from improperly grounded equipment and or an improperly grounded electrical service to a building No known water treatment prog
79. representative sample of the head loss associated with various fittings for copper or steel is listed below Recommended flow rates for various pipe materials are tabulated on the next two pages EQUIVALENT FEET OF PIPE FOR FITTINGS AND VALVES Nominal pipe size inches 1 2 3 4 1 0 114 112 2 0 45 Degree Elbow 0 8 0 9 1 3 1 7 2 2 2 5 90 Degree Elbow Long 1 0 1 4 1 7 2 3 2 71 3 5 Gate Vale Open 0 7 0 7 0 9 1 0 1 5 1 8 2 3 Full port ball valve 0 3 0 4 0 5 0 7 0 8 1 0 Tee Side Flow 3 0 4 0 5 0 7 0 9 0 12 0 Swing Check Valve 6 0 8 0 10 0 14 0 16 0 20 0 GARN Installation Manual Rev11 Apr 2010 28 Flow and heat capacity 4 of head loss per 100 of pipe length SIZE INSIDE DIA FLOW gpm BTU HR BTU HR BTU HR 10F delta T 20F delta T 30F delta T Oxygen Barriered PEX Tubing 3 4 678 3 15 000 30 000 45 000 1 875 5 5 27 500 55 000 82 500 1 1 4 1 28 15 75 000 150 000 225 000 1 1 2 1 60 27 135 000 270 000 405 000 2 2 03 52 260 000 520 000 780 000 Type L Rigid Copper Tube max vel 6 sec for noise max vel 10 sec for erosion 3 4 785 3 5 17 500 35 000 52 000 4 1 025 6 5 32 500 65 000 97 000 1 1 4 1 265 12 60 000 120 000 180 000 1 1 2 1 505 18 90 000 180 000 270 000 2 1 985 39 195 000 390 000 585 000 Schedule 40 Black Steel Pipe 3 4 824 4 2 21 000 42 000 63 000 1 1 049 8 40 000 80 000 120 000 1 1 4 1 380 17 85 000 170 000 255 000 1 1 2 1 610 25 125 000 250 000 375 000 2 2 067 48 240
80. results The sample bottle needs to be filled and returned per the instructions a PrecisionChem Water Treatment will complete a full analysis of the sample Results and recommendations will be shipped to the owner Large amounts of sludge or dirty water should be noted when the water samples are sent in Chemical level corrosion potential scale sludge potential and biological fouling bacteria and fungus are examples of things that will professionally monitored Recommendations are to be followed and necessary actions taken to ensure positive results This program supports only PrecisionChem Water Treatment products and services Periodic dosing of additional CLT 551 chemical is to be expected It may also be required to add other chemicals to remedy specific conditions or problems ex Biocide to kill bacteria following a positive test result for presence of bacteria These chemical additions will be based on viable testing and require appropriate and prudent action DO NOT add oxygen scavenging chemical compounds i e sodium sulfite sulfite meta sulfite bisulfite These materials are inappropriate for GARN WHS equipment and will result in corrosive conditions and early tank failure GARN WHS units are not an open system such as a steam boiler and should not be chemically treated as such DO NOT add bleach or any chlorine bromine based products to the system to act as a Biocide The addition of these products will
81. sion spots thoroughly by wire brushing and flushing with clean water 7 Refill the GARN unit in compliance with Initial Water Treatment Installation Procedures above Obtain a treated water sample from the manway access and forward it to the water treatment company for an initial chemical test Use standard sampling procedures in obtaining the sample Upon receipt of the test results adjust the chemical concentration as advised GARNg Installation Manual Rev11 Apr 2010 25 J RULES OF THUMB FOR AN INITIAL ESTIMATE OF EQUIPMENT SIZE The following rules of thumb are just that approximate values that may be used to estimate the size of the primary wood heating equipment Once a project is given the go ahead an exact heat loss should be calculated according to ASHRAE methods to ensure the correct sizing of the various components Over sizing equipment leads to excessive first cost and inefficient operation Under sizing yields a system that may be excessively noisy and not maintain proper indoor temperatures during winter operation Residential Heat Loss excluding ventilation Old houses or poorly insulated houses 20 to 35 BTUH sq ft of above grade floor area Uninsulated but heated basements 18 to 30 BTUH sq ft of below grade floor area Newer houses 13 to 22 BTUH sq ft of above grade floor area Insulated heated basements 10 to 20 BTUH sq ft of below grade floor area Energy efficient hous
82. so because of less expensive heating ventilation and air conditioning systems due to reduce heating and cooling loads So what about swimming pool heating This is best accomplished utilizing solar heating and or an evaporation prevention blanket Solar heating has proven cost effective dependable and efficient for many years in many countries Solar heating is not an outside the mainstream idea In fact it is efficient in almost every area of the US Most people do not realize that a swimming pool requires a heater that may be several times the size and capacity of their residential space heater However during the spring summer and fall the amount of energy required to heat a pool is easily provided by solar panels All without emissions that exacerbate the local air shed pollution problem Remember this Eliminating fuel usage is the same as burning fuel with absolutely zero emissions impossible for any fuel even natural gas A well designed and constructed energy efficient building can reduce heating demand thus fuel usage by at least half and sometimes by two thirds when compared to a present day code built house This is critical in urban or suburban location GARN Installation Manual Rev11 Apr 2010 16 H INSULATION OF GARN WHS EQUIPMENT CAUTION Construction of the insulation enclosure around the GARN WHS unit shall utilize ONLY NON COMBUSTIBLE MATERIALS such as sheetrock galvanized metal studs and sheet
83. ssure rated flat plate heat exchanger Contact your local GARN dealer or DECTRA CORPORATION for sizing availability and pricing GARN Installation Manual Rev11 Apr 2010 30 Calculation of Net Positive Suction Head For Pumps All GARN WHS wood heating units are zero pressure closed systems as opposed to Open system replaces the vast majority of its contained water daily A good example of this is a domestic water heater Pressurized closed system replaces little if any of its contained water on a yearly basis and operates with an internal pressure of 15 to 30 PSIG A good example is a standard hot water boiler that is used for space heating A zero pressure closed system does not develop internal pressure due to its unique open vent system Such systems do replace a minor volume of contained water on a yearly basis The designer must take into account net positive suction head NPSH when selecting pumps for such systems Proper selection will prevent cavitation and suction boiling that can destroy the pump prevent the system from attaining its rated heating capacity or air lock the hydronic system totally Graphs of pump performance and net positive suction head requirements are available from pump manufacturers In all cases the NPSHA available must be greater than the required NPSH for a specific pump Generally lower RPM pumps have lower NPSH requirements Calculation of Net Positive Suction Head For Pumps
84. tainer GARN Installation Manual Rev11 Apr 2010 12 CAUTION When the sidewall discharge is used care should be taken that the hot surfaces and gases do not present a hazard to any person who might frequent the area Support all flue components to ensure structural integrity during the life of the flue Use only non combustible i e steel aluminum etc materials for such supports and generally follow flue manufacturers recommendation Depending on the fuel used and frequency of firing the volume of initial smoke coming from a horizontal sidewall flue may be a nuisance If windows or doors are in or near the smoke path a vertical flue should be used Likewise if the horizontal sidewall flue discharges into a confined space between two buildings a vertical flue must be used Refer to the accompanying chart for minimum specified clearances to various architectural features such as windows or materials WARNING Maintain a clean area free of any combustible debris such as leaves trees plants grasses paper wood tires oil etc for a distance approximated by a circle with a radius of at least 15 centered on the flue elbow discharge This is especially important during dry weather in the Spring and Fall CAUTION Depending on your firing rate and fuel type the cool surfaces of the metal container may become lightly coated with ash and creosote The accumulated ash and creosote should be removed periodic
85. tents United States Patent 4 401 101 and 4 549 526 Canadian Patent 1 163 890 and 1 220 636 Other patents pending in the United States and Canada GARNES is a registered trademark of DECTRA CORPORATION DECTRA CORPORATION 3425 33 Avenue Northeast Saint Anthony Minnesota 55418 Phone 612 781 3585 Fax 612 781 4236 Web Site www garn com GARN Installation Manual Rev11 Apr 2010 57 WARRANTY WARRANTY ON GARN PRODUCTS GARN products are warranted by the manufacturer to be free of defects in material and workmanship as follows with the below enumerated exclusions With respect to the blower motor controls and miscellaneous parts furnished as part of the basic unit a one year warranty shall apply With respect to the storage tank combustion chamber flue tube heat exchanger outer door middle door and blower housing a five year warranty shall apply with regard to materials and workmanship e With respect to wear items such as gaskets firebrick reaction chambers door latch and latch pin door hinge and hinge pin etc a one year warranty shall apply regarding materials and workmanship excluding normal wear and tear Proper use and periodic maintenance will extend the life of these items No warranty with regard to either anode rods or chemicals NO WARRANTY SHALL APPLY WITH REGARD TO EPOXY COATINGS PAINT CORROSION OR CORROSION INDUCED FAILURES OF ANY COMPONENT OF THE UNIT OR COMPONENTS
86. the system Add water treatment chemicals based upon the volume of water added 3 Add the recommended biocide at the following times whenever makeup water is added to the unit a few days before the end of the heating season and at the beginning and or middle of the heating season Dusty or dirty locations require more frequent biocide additions to minimize sludge build up and under deposit corrosion potential 4 Draw two samples of the treated water per year and send them to the water treatment company for testing and analysis Upon receipt of the test results adjust the chemical concentration as advised by the water treatment company 5 Once per year unscrew one of the magnesium anode rods remove it and examine it for degradation anode rods are also consumed while providing protection If the rod is in poor condition contact DECTRA to order replacement rods Install new magnesium anode rods without thread compound or Teflon thread tape The rod thread must develop a good electrical contact with the tank fitting into which it is screwed Do not install aluminum anode rods Accelerated magnesium anode rod degradation may be a sign of electrolysis Accelerated anode rod degradation may indicate the presence of a poor ground connection a floating ground condition or stray voltage within the building wiring or electrical service to the building Installation of a proper ground will help to minimize this condition Contact a local el
87. to the nearest tenth TABLE 2 System Type HWS temperature F Vapor Pressure ft Radiant floor heat Radiant floor heat 104 F Radiant floor heat 113 F Radiant floor heat 125 F Air coil 125 F European wall radiator 140 F Hot water baseboard 150 F Se aa Hot water baseboard can be sized to utilize 140 F HWS GARN Installation Manual Rev11 Apr 2010 32 Underground Piping Use only oxygen barriered cross linked high density polyethylene for underground installation HeatLink Wirsbo and pre insulated Ecoflex are the preferred brands Underground piping must be designed to allow for expansion and installed in strict compliance with the manufacturer s specific instructions In addition DO NOT install copper steel polybutylene or PVC pipe underground DO NOT join pipe underground unless absolutely necessary If required use ONLY materials provided by the pipe manufacturer and installed according to their specific directions Insulate all underground pipe with at least 2 wall polyolefin pipe insulation rated to 212 degrees Thermocel Imcolock Imcoshield are the preferred brands DO NOT USE rubber based insulation such as Rubatex as it will absorb water and destroy the insulation value Encase the pipe insulation within flexible black corrugated seamless non perforated polyethylene drainage tubing This is low cost and locally available in 4 to 8 diameters This provides prote

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