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Lifebreath 2500IFD User's Manual

1. Supply from outside 38 4 FRONT VIEW ENERGY SYSTEMS INC Exhaust from building BACK VIEW 511 McCormick Blvd London Ontario N5W 4C8 Ph 519 457 1904 Fx 519 457 1676 Email nutech lifebreath com Website www lifebreath com TI 911 0103 PERFORMANCE AIRFLOWS Each Air Stream 1316 2800 4 HIGH SPEED 1175 2500 1034 2200 MEDIUM SPEED S 893 1900 LOW SPEED 3 752 1600 3 611 1300 o 4 470 1000 iL fe 329 700 lt 188 400 47 100 25 50 75 100125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 EXTERNAL STATIC PRESSURE IN PASCALS in W C TEMPERATURE EFFECTIVENESS 70 o 3 60 EFFECTIVENESS 50 o 3 NOTE Exhaust Relative Humidity RH at 40 850 944 1039 1133 1228 1322 1416 1800 2000 2200 2400 2600 2800 3000 AIRFLOW IN L s CFM OPTIONS AND ACCESSORIES 99 101 CRANK TIMER Mechanical timer to activate high speed 99 116 DEHUMIDISTAT VENTILATION CONTROL DVC Turns unit on off via slider switch and high low via built in dehumidistat 99 130 DEHUMIDISTAT Roof Curb optional Activates high speed when indoor humidity Part No 53
2. The first step is to operate all mechanical systems on high speed which have an influence on the ventilation system i e the HRV itself and the forced air furnace or air handler if applicable This will provide the maxi mum pressure that the HRV will need to overcome and allow for a more accurate balance of the unit Drill a small hole in the duct about 3 16 three feet downstream of any elbows or bends and one foot upstream of any elbows or bends These are recommended distances but the actual installation may limit the amount of straight duct The Pitot tube should be connected to a magnehelic gauge or other manometer capable of reading from 0 to 0 25 in 0 62 Pa of water preferably to 3 digits of resolution The tube coming out of the top of the pitot is connected to the high pressure side of the gauge The tube coming out of the side of the pitot is con nected to the low pressure or reference side of the gauge Insert the Pitot tube into the duct pointing the tip into the airflow Magnehelic gauge For general balancing it is sufficient to move the pitot tube around in the duct and take an average or A typical reading Repeat this procedure in the other supply or return duct Determine which duct has the highest airflow highest reading on the gauge Then damper that airflow back to match the lower reading from the other duct The flows should now be balanced Actual airflow can be determined from the
3. air that is being exhausted 2500 n pe P TAT mount puis 2500 E ES p ee roof mount Deol Table of Contents latro JUCO sesion 2 Select OMA ici it 3 Specifications Model 2500IFD 4 Options 8 Accessories 5 Specifications Model 2500EFD 6 Options amp Accessories 7 Operation Instructions secas ita 8 Installation PS daa tad 8 Remote Controls ocioccconicncncnonoccncncncnnnnncnnncncnnoronannnoss 9 User Adjustable Defrost iii 9 a A A O A 9 A ria 10 localo esca ocre 10 Mounino iA A ee ee 10 VERO A ERA 13 A lea 13 Return and SUI is 14 Air Flow Balancing s 15 The Integrated HVAC System sssi 16 Electrical Connections sceseseseseeseeseeeeteeseseseseaeee 16 WINING CS sa A i a LA o 16 Wiring Diagram cosa ia 18 Warranty Selecting the Correct Size HRV Commercial and Institutional Requirements For outdoor air requirements ASHRAE has produced the Ventilation Standard 62 1989 that is used to determine acceptable ventilation rates This standard is referenced directly or used as Good Engineering Practice in most Code documents or design criteria Small restaurants Donut Shops and Fast food stores Seats 40 Employees Total 45 ASHRAE requirement Ventilation required Bar or Tavern Seats 50 Employees Total 57 ASHRAE requirement Ventilation requir
4. and or firestats in the HVAC or HRV ductwork Because an HRV is designed to bring fresh air into the building structures may require a supply voltage interrupt when smoke or flame sensors are triggered or central fire alarm system is activated Supply air grilles may be ceiling or high wall mounted Avoid locating incoming fresh air grilles that could cause a direct draft on the occupants as the incoming air may be below room temperature A reheat duct heater can be installed to improve occupant comfort Information on electric or hydronic heaters is available through Nutech The use of balancing dampers or adjustable grilles as supply air diffusers and air exhaust grilles are recom mended TECHGRILLES are round efficient sound absorbing devices available in 4 5 6 and 8 100 125 150 and 200mm AIR FLOW SUPPLY AIR FLOW TECHGRILLE EXHAUST optional schematic PITOT TUBE AIR FLOW BALANCING Commercial It is necessary to have balanced air flows in an HRV The volume of air brought in from the outside must equal the volume of air exhausted by the unit If the air flows are not properly balanced then The HRV may not operate at its maximum efficiency A negative or positive air pressure may occur in the house The unit may not defrost properly Failure to balance HRV properly may void warranty Excessive positive pressure may drive moist indoor air into the external walls of the building w
5. model and accessories referred to below to be free from manufacturing defects This Warranty is personal to NUTECH and is in effect from the date of the original pur chase for a period of two years save and except that a 15 YEAR WARRANTY is given to the LIFEBREATH core should it develop a condensation leak or become perforated due to corrosion caused by normal use Damage resulting from all other causes including but not limited to lighting hurricane tornado earthquake or any other acts of God improper installation modification alteration or misuse of the LIFEBREATH or its operation in a manner contrary to the instructions accompanying the unit at the time of sale accidental or intentional damage neglect improper care or other failure by the owner to provide reasonable and necessary maintenance of the product any attempt at repair by an unauthorized service representative or not in accordance with this warranty or any other causes beyond the control of NUTECHP are excluded from this warranty If you feel that the LIFEBREATH you purchased is not free from manufacturing defects please contact NUTECH ENERGY SYSTEMS INC 511 McCormick Blvd London Ontario NSW 4C8 519 457 1904 or fax 519 457 1676 to find the name of your nearest dealer in order to repair the product The labour required to install any replacement part s shall be dealt with at the option of the customer in either of the following ways a the customer ma
6. outs are provided One is to be used for line voltage and the other one for 24V control wires Maintenance As with any mechanical system a dedicated maintenance program will prolong the life of the equipment and maintain its optimum performance We recommend at least two 2 full inspections and cleanings per year under normal operating conditions and more if circumstances warrant it Service should include Cleaning of screens protecting outside hoods Cleaning of core To access core remove service panels and Slide core halfway out Wash core protruding from cabinet with water and or a mild cleaning solution Push core through to the other side of the cabinet and repeat procedure to clean the other side of the core In many cases only a vacuuming of the core surface is required Inspect filters and replace as necessary Wipe down drain pans and inside of cabinet using a mild disinfectant Ensure condensate drain has free flow of moisture Inspect blowers and electrical panel Confirm operation The Integrated HVAC System Check design static pressure of air handler to ensure it is ROOFTOP compatible with HRV HEAT COOL UNIT J SUPPLY DUCT z i FRESH AIR STALE AIR SUPPLY EXHAUST DAMPERS OR ADJUSTABLE GRILLES HRV UNIT i BALANCING O DAMPERS Figure 4 ROOFTOP HEAT COOL UNIT ROOF DECK CEILING RETURN AIR PLENUM A A N Y SUPPLY DUCTWORK AS FRESH AIR IN
7. 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 EXTERNAL STATIC PRESSURE IN PASCALS in W C TEMPERATURE EFFECTIVENESS a 3 60 EFFECTIVENESS 50 3 NOTE Exhaust Relative Humidity RH at 40 850 944 1039 1133 1228 1322 1416 1800 2000 2200 2400 2600 2800 3000 AIRFLOW IN L s CFM OPTIONS AND ACCESSORIES 99 101 CRANK TIMER Mechanical timer to activate high speed 99 116 DEHUMIDISTAT VENTILATION CONTROL DVC Turns unit on off via slider switch and high low via built in dehumidistat Roof Curb optional 99 130 DEHUMIDISTAT Activates high speed when indoor humidity Part No 53 2500 rises above set point on control Supply air 99 140 4 TECHGRILLE vet 99 141 5 TECHGRILLE Duct Gollar Supporte 99 142 6 TECHGRILLE 99 148 8 TECHGRILLE Round white step type diffusers 53 2500 OPTIONAL ROOF CURB Supports HRV on roof and connects HRV to ducting below WEIGHT 50lbs Return air x i Factory installed Information about design built electric make up heat Spong perimeter wooden coils available upon request nailer strip TI 91E 7 0103 Operation Instructions The LIFEBREATH 2500 series HRV is designed tobe operated continuously or intermittently to meet the requirements of th
8. 2500 rises above set point on control Supply air 99 140 4 TECHGRILLE OR 99 141 5 TECHGRILLE Duct Gallas Supports 99 142 6 TECHGRILLE 99 148 8 TECHGRILLE Round white step type diffusers 53 2500 OPTIONAL ROOF CURB Supports HRV on roof and connects HRV to ducting below WEIGHT 50lbs i Z Return aif Factory installed Information about design built electric make up heat opening perimeter wooden coils available upon request nailer strip TI 911 0103 HEAT RECOVERY VENTILATORS HRVs SPECIFICATIONS AIR FLOW 2100 cfm 985 L s at 1 0 wg ESP PERFORMANCE 70 effective at 2500 cfm 1172 L s CORE Modular aluminum sensible heat recovery core Plate to plate type Slides out of either side of cabinet for service MOTORS Two single shaft PSC 3 speed 208 230V 5 1 amps 1 ph 1 hp BLOWERS Two direct drive centrifugal blowers one per air stream FILTERS Two 18 X 24 4 inch pleated filters in each air stream DUCT CONNECTIONS Hoods 2 c w Bug Screen Model 2500EFD ROOFTOP Exhaust Hoods Exhaust Duct 24 x16 Heat Exchange Core Supply to Duct 24 x16 Four 24 X 16 610mm X 406mm to and from the building under cabinet Four 28 X 18 711mm X 457mm hoods included on side of cabinet with screens CABINET 20 gauge powder coated galvanized steel G60 for superior corrosion resistance 16 gauge galvanized frame insulated with 1 5 fibreglass insulation to prevent con
9. LIF HEAT RECOVERY VENTILATORS HRVs OPERATION AND INSTALLATION MANUAL For Models 25001FD 2500EFD APPLICATION WARNING CAUTION Before installation careful consideration must be given to how the system will operate if connected to any other piece of mechanical equipment i e a forced air furnace or air handler operating at a higher static After installation the compatibility of the two pieces of equipment must be confirmed by measuring the airflow s of the Heat Recovery Ventilator HRV by using the balancing procedure in this manual It is always important to assess how the operation of any HRV may interact with vented combustion equipment NEVER install an HRV in a situation where its normal operation lack of operation or partial failure may result in the backdrafting or improper functioning of vented combustion equipment e Do Not Attempt Installing Unit Without First Reading Entire Manual TI 59 0201 INTRODUCTION These Heat Recovery Ventilators HRVs are designed for commercial and industrial applications to provide fresh air to a building while exhausting an equal amount of stale air During the winter months the incoming cold fresh air is warmed by utilizing the heat recovered from the stale air before it is exhausted to the outdoors During summer months when the indoor space is air conditioned the Heat Recovery Ventilator will help in cooling the incoming fresh air with the stale
10. TAKE HRV UNIT STALE AIR EXHAUST HRV FRESH STALE AIR AIR SUPPLY EXHAUST DUCT BALANCING f DAMPERS Figure 5 BALANCING DAMPERS A Fresh Air Supply B Stale Air Exhaust 17 2500 WIRING DIAGRAM BROWN BROWN CAP CAP SUPPLY EXHAUST MOTOR T x a amp E a amp gi s 3 e IES 3 ie e e a E O a g O SUPPLY N EXHAUST AN M N MS SMS MES M S HIGH S S S S SS A N A 33 S TIN x 5 By AN N ran Fani AN M Ri R2 RI R4 O O O O NO NC NO NC NO NC NO NC M gt TIMER COM COM gt com COM My Y gt O 0 O O ran ran MN NM IN mM SNAP DISK O T5 Foa 24V 240V T4 AN mM ON OFF gt a O Sila Bis MAX MAX HIGH LOW O _ HIGHILOW O 154 15A XFRM1 L1 L2 FEMMINE COMMON 240 VAC u 5 AMP 15 AMPS 24 VAC 24 VAC TI 109 07 97 18 ae CIAL LIFE ERY VE o Year Limited Warranty 15 Year Core Warra NUTECH ENERGY SYSTEMS INC NUTECH warrants to the purchaser of the Commercial LIFEBREATH
11. and Installed Provides high speed ventilation when humidity level LOW by Contractor ON OFF HIGH LOW S O O a O COMMON Defrost timer device Yellow see wiring diagram for location Yellow outer dial adjusts length of time between defrost cycles OFF cycle Orange Orange center dial adjusts time spent in defrost mode ON cycle Factory pre set dial positions DO NOT ADJUST EXAMPLES OF DEFROST CYCLES 32 F 0 C No defrost required 139F 119C 10 mins defrost ON 30 mins defrost OFF 40 F 40 C 15 mins defrost ON 30 mins defrost OFF Fan Defrost The Models 2500IFD and 2500EFD are equipped with an electronically controlled fan defrost system to remove frost that collects on the warm air side of the aluminum heat transfer surfaces of the heat exchanger core When the outside temperature drops below 27 F 3 C a defrost timer is activated which provides for an auto matic defrost cycle During the automatic defrost cycle the fresh air supply is shut off while the exhaust fan continues to operate Both the times between defrost cycles and the length of time spent in defrost are adjustable see pg 9 for details This allows warm inside air to flow over the heat exchanger core melting any frost accumulation After the defrost period the fresh air supply fan automatically returns to the normal speed and fresh outside air continues to be drawn into the building Wa
12. assing through unheated areas in order to avoid condensation problems and energy losses from the air streams Consult local Codes To minimize pressure drop and noise galvanized metal ducts sized for 1200 fpm 6 09 m s maximum velocity are recommended Keep ducting as short as possible and use a minimum of elbows and tees Connecting sections and shorter runs may be flexible ducting one size larger than the metal duct Use flexible duct connectors at the HRV to avoid noise transmission All duct joints must be secured with screws rivets or duct sealant and sealed with aluminum duct tape to prevent leakage Outside Weatherhoods The 2500EFD is shipped with 2 weatherhoods inside the cabinet which attach to the outer ends of the cabi net using bolts provided The 2500IFD requires hoods to be built elsewhere and provided by the contractor The 2500EFD has built in screens to prevent foreign objects from entering into the ductwork through the out side hoods 13 NOTE It is extremely important to design and install the fresh air intake in an area where the hoods will gather the freshest air free from restriction Recommended no less than 10 ft 3 m apart from each other at least 18 in 46 cm above ground level away from sources of contaminants such as automobile exhaust fumes gas meters garbage containers cooling towers etc not exposed to prevailing winds whenever reasonably possible The outside perime
13. densation DRAIN Two stainless steel drain pans with 1 2 NPT drain spouts MOUNTING Rooftop mounted on optional roof curb Part No 53 2500 CONTROLS 24V terminal strip inside electrical box to connect optional Filter Service Panel Electrical Service Panel SIDE VIEW NOTE Removable service access panels on both sides of 2500EFD cabinet remote controls not included obtain on off and high low functions DEFROST Factory set defrost time user adjustable Supply motor is shut off while exhaust air defrosts core WARRANTY 15 year warranty on heat exchanger and 2 years on parts WEIGHT 700 lbs SHIPPING WEIGHT 1100 Ibs OPTIONAL CURB WEIGHT 50 lbs DATE PROJECT MECHANICAL CONTRACTOR 62 7 lt gt Bottom duct connections 1 16 X 24 38 4 og i her 15 2 12 5 Supply Return TOP VIEW Fxhaust All units conform to CSA and UL standards 511 McCormick Blvd London Ontario N5W 4C8 Ph 519 457 1904 Fx 519 457 1676 Email nutech lifebreath com Website www lifebreath com ENERGY SYSTEMS INC TI 91E 0103 PERFORMANCE AIRFLOWS Each Air Stream 1316 2800 a 1175 2500 LL 1034 2200 893 1900 752 1600 611 1300 9 8 7 470 1000 32 18 4 700 400 100 AIRFLOW L s CFM 25 50 75 100
14. e application CONTINUOUS OPERATION For continuous operation a simple jumper across the ON OFF and COMMON jumper terminals is needed HIGH LOW speed selection requires another jumper across HIGH LOW and COMMON select as required see below and wiring diagram ON OFF T2 High Low HIGH LOW T1 Common Low Voltage 24VAC INTERMITTENT OPERATION Due to variance in the times in which buildings are occupied and equipment or machinery operated intermittent ventilation may be the preferred method Dry contacts located inside the electrical panel enable this unit to turn ON and OFF and or jump between HIGH and LOW speeds when optional low voltage controls are connected see above and pg 9 OPTIONAL REMOTE CONTROLS Basic controls such as dehumidistats mechanical crank timers 24 hour timers or toggle switches can be used to control the unit see pg 9 Installation Tips 1 Whichever method is chosen to operate the 2500 keep in mind that Air to Air exchangers in general are not booster fans and are normally sized to ventilate at a steady rate To achieve optimum performance from the 2500 the desired ventilation rate speed of the system should be reached before the contaminant to be removed has reached its maximum EXAMPLE A bingo hall opening at 7 00PM that is sized for 5000 cfm should have at least this amount of air exchange by that time If the unit is not turned on or set to its designated speed unt
15. ed 20 cfm 10L s per person 45 x 20 900 cfm 450 L s 30 cfm 15L s per person 57 x 30 855 cfm 403 L s Classroom and School Portables Seats 29 Teacher 1 Total 30 ASHRAE requirement Ventilation required Beauty Salon Customers 12 Employees 6 Total 18 ASHRAE requirement Ventilation required Outdoor Temp Cc F 15 cfm 7 5L s per person 30 x 15 450 cfm 255 L s 25 cfm 12 5L s per person 18x 25 450 cfm 255 L s Bank Customers Staff 9 Total 34 ASHRAE requirement Ventilation required Bingo Hall Customers Staff 20 Total 200 ASHRAE requirement Ventilation required Print Shop Duplicating Square footage of shop ASHRAE requirement Ventilation required Swimming Pools 20 cfm 10L s per person 34 x 20 680 cfm 320 L s 30 cfm 15L s per person 200 x 30 6000 cfm 3000 L s 2000 square ft m 0 5 cfm ft2 2 5L s m2 per person 2000 x 0 5 1000 cfm 500 L s Refer to Pool Models Installation Manuals MAKE UP HEAT REQUIREMENT at 1200 CFM 566L s Nominal kW Req for 20 C 68 F Air Delivery Nominal kW Req for 25 C 77 F Air Delivery Nominal kW Req for 30 C 86 F Air Delivery HEAT RECOVERY VENTILATORS HRVs SPECIFICATIONS AIR FLOW 2100 cfm 985 L s at 1 0 wg ESP Exhaust to Outside PERFORMANCE 70 effective at 2500 cfm 1172 L s CORE Modular aluminum sensible heat recovery core Plate to plate type Slides out
16. gauge reading The value read on the gauge is called the velocity pressure The Pitot tube comes with a chart that will give the air flow velocity based on the velocity pressure indicated by the gauge This velocity will be in either feet per minute or metres per second To determine the actual airflow the velocity is multi plied by the cross sectional area of the duct being measured This is an example for determining the airflow in a 6 duct The Pitot tube reading was 0 025 inches of water From the chart this is 640 feet per minute The 6 duct has a cross sectional area of 3 14 x 6 12 4 0 2 square feet The airflow is then 640 ft min X 0 2 square feet 128 cfm For your convenience the cross sectional area of some common round duct is listed below DUCT DIAM inches CROSS SECTION AREA sq ft 5 0 14 6 0 20 ii 0 27 The accuracy of the air flow reading will be affected by how close to any elbows or bends the readings are taken Accuracy can be increased by taking an average of multiple readings as outlined in the literature supplied with the Pitot tube Pitot tube and gauge Pitot Tube Air Flow Balancing Kit c w magnehelic gauge Pitot tube hose and carry case PART NO 99 167 Outdoors Note Duct connections may vary depending on model Place pitot tube a minimum of 18 from blower or elbows The Integrated HVAC System The 2500 is a quiet efficien
17. here it may condense in cold weather and degrade structural components May also cause key holes to freeze up Excessive negative pressure may have several undesirable effects In some geographic locations soil gases such as methane and radon gas may be drawn into the home through basement ground contact areas Excessive negative pressure may also cause the backdrafting of vented combustion equipment Read the Application Warning on the front of this manual Prior to balancing ensure that 1 All sealing of the ductwork system has been completed 2 All of the HRV s components are in place and functioning properly 3 Balancing dampers are fully open 4 Unit is on HIGH speed 5 Air flows in branch lines to specific areas of the house should be adjusted first prior to balancing the unit A smoke pencil used at the grilles is a good indicator of each branch line s relative air flow 6 After taking readings of both the stale air to the HRV duct and fresh air to the house duct the duct with the lower CFM L s velocity reading should be left alone while the duct with the higher reading should be dampered back to match the lower reading 7 Return unit to appropriate fan speed for normal operation BALANCING PROCEDURE The following is a method of field balancing an HRV using a Pitot tube advantageous in situations when flow stations are not installed in the duct work Procedure should be performed with the HRV on high speed
18. il after the contaminant has reached an uncomfortable level then it may result in a number of hours passing before the system could catch up 2 It is highly recommended that back draft dampers be installed in the supply and exhaust duct work to the outside to prevent air from entering in through the HRV when the unit is off Failure to install back draft dampers may result in damage to HVAC equipment and or other building components Optional Remote Controls INDE DE VENTILATION A DESHUMI exceeds selected setting PART NO 99 130 CRANK TIMER Crank Timer 60 minute PART NO 99 101 User Adjustable Defrost OPERATION Once the snap disk senses temperatures below 3 C 27 F it will activate the defrost mode which begins with the Defrost OFF cycle and then continues into the Defrost ON cycle Factory pre set defrost cycle and time are DEFROST ON 15 HR 10 mins DEFROST OFF 50 HR 30 mins e Provides high speed ventilation as required DEHUMIDISTAT VENTILATION CONTROL O Bi LOCATION Spa or pool area anywhere that humidity ON Bess Vomano Gowo is a concern connect 1 unit only Ventilation control turns HRV system OFF and ON Dehumidistat increases ventilation when required Red common Black hi low Orange on off PART NO 99 116 c w 3 wire cable 60 18m OEE HIGH REMOTE DEHUMIDISTAT LOCATION Spa or pool area anywhere that humidity Supplied is a concern
19. m while effectively removing contaminants from the space In designing the exhaust portion of the system the exhaust grilles are placed so as to remove the contaminants while not allowing them to enter the breathing zone of the occupants For contaminants that are lighter than air grilles should be located high on the wall If contaminants are heavier than air a lower placement of the grilles will be required Information on a contaminants specific gravity and toxicity should be available from the chemical data sheets 14 Fresh Air Supply System The fresh air supply ductwork from the HRV may be directly connected to the return air duct of the forced air system When directly connected it is recommend ed that the air handler blower be in constant operation to move the fresh air about the building see Installation Warning under The Integrated HVAC System on page 16 Also it is advisable to include a short length of fabric flex duct or other non metallic connector in this hard ducted line in order to keep the HRV acoustically isolated and separately grounded electrically from the air handler This will avoid a possible shock hazard to service people if a short to ground develops in one of the devices It may be nec essary to install a separate fresh air supply ductwork system if the heating is other than forced air When installing an HRV the designer and installer should be aware of local codes that may require smoke detectors
20. of either side of cabinet for service Motors 2 MOTORS Two single shaft PSC 3 speed 208 230V 5 1 amps 1 ph 1 hp BLOWERS Two direct drive centrifugal blowers one per air stream FILTERS Two 18 X 24 4 inch pleated filters in each air stream DUCT CONNECTIONS Four 24 X 16 610mm X 406mm CABINET 20 gauge powder coated galvanized steel G60 for superior corrosion resistance 16 gauge galvanized frame insulated with 1 5 fibreglass insulation to prevent condensation DRAIN Two stainless steel drain pans with 1 2 NPT drain spouts MOUNTING Unit to be set on support brackets hung by threaded rod type apparatus Brackets and rod not provided CONTROLS 24V terminal strip inside electrical box to connect optional remote controls not included obtain on off and high low functions DEFROST Factory set defrost time user adjustable Supply motor is shut off while exhaust air defrosts core WARRANTY 15 year warranty on heat exchanger and 2 years on parts WEIGHT 700 lbs SHIPPING WEIGHT 1100 Ibs All units conform to CSA and UL standards DATE PROJECT MECHANICAL CONTRACTOR Supply to Building Model 25001FD Heat Exchange Core Drain Pans 2 89 9 Filter Service Panel SIDE VIEW NOTE Removable service access panels on both sides of 2500IFD cabinet Exhaust to outside Supply to building lt 38 4 gt
21. ough the roof will be required It is also important to ensure that the perimeter of the curb is insulated but the interior of the curb is not This allows heat from the building to prevent freezing of the drain lines and pans The 2500IFD should be hung by a threaded rod type assembly which provides a cradle for the unit see pg 11 Note that 2X4 s should sit under the unit to avoid damage to the lip of the cabinet The HRV may also be mounted on an equipment platform provided that the drain hoses are clear and there is sufficient space for service access BLOWER STALE AIR Y TA TO OUTSIDE MOTORS gt FRESH AIR TO INSIDE BLOWER Mounting the 2500 2500IFD Saddle mount not provided Threaded rods NOTE When installing your Lifebreath HRV flexible duct connectors should be installed between the HRV and the galvanized ductwork 2500IFD Platform mount not provided l ee 2 X 4 under unit and on top of hanging bracket to prevent weight of unit from being put on lip of cabinet U channels Lip Hang unit with threaded rods and U channel members 2500EFD Roof mount Vibration isolators May be anchored to floor leaving space for drain connections Mount unit on wooden or metal support assembly Unit must be raised an adequate height for installation and slope of drain lines Roof curb NOTE Roof curb is one inch smaller than out
22. rame has been squared straightened and shimmed weld or attach frame securely to roof MAX SLOPE TOLERANCE 1 16 per linear foot in any direction Note specification of duct location on bottom of HRV when positioning cross members duct cavity 12 Roof Curb Assembly Figure 1 slot for tab locking tab Figure 2 a strip Q 0 Q 0 end piece locking tab wood nailer strip side piece slot for tab Figure 3 wood nailer strips _ spike tabs through slots Drains Connect the stainless steel drain pans in the bottom of the HRV to a drain line fastened to the holes provided See pg 10 for location of the drain pans and the drain connections Create a P trap to prevent odours from being drawn through Make sure the drain line slopes down to drain properly and if this is not possible a con densate pump will be required for removal of the water Note that stagnant water is a leading cause of indoor air quality problems confirm drainage after installation by pouring water into trays Drain line must be installed where it will not freeze The Ductwork System A well designed ducting system will allow the HRV to operate at its maximum efficiency Avoid the use of undersized ducting and sharp radius bends and tees which can significantly increase the system pressure drop and reduce the air flows NOTE Fully insulated ducting with an integral vapour barrier must be used on all runs p
23. side dimensions of cabinet 11 Roof Curb Assembly Instructions FRAME ASSEMBLY 1 Take one end piece locking tabs and one side piece slots Stand both pieces vertically on the floor or roof See Figure 1 2 Raise slightly the corner of the end piece locking tabs and mate with side piece slots ensuring that lower locking tab with leading edge is through slot opening See Figure 2 3 Push down on top edge of end piece Ensure that all 3 of the locking tabs are feeding into each correspond ing slot Once both pieces are flush the process is complete See Figure 3 4 Drive one spike provided into wood nailer strips at each corner See Figure 3 FRAME APPLICATION AND LOCATION This roof mounting frame provides necessary support when the unit is installed The frame can be installed directly on deck having adequate structural strength or on roof supports under deck SECURING THE FRAME To ensure proper mating with unit it is critical that mounting frame be squared to the roof as follows 1 With frame situated level in desired location on roof trusses tack weld one corner of frame 2 Measure frame diagonally from one corner to the opposite corner Repeat with the remaining two cor ners These dimensions must be equal for the frame to be square 3 It is extremely important to sight frame from all cor ners to ensure that the frame is not twisted across top side Shim frame under any low sides 4 After f
24. t low pressure system Special care and attention should be given if connecting this unit to any other air handler that may draw more air than the 2500 is designed to accommodate The HRV has become an integral component of the HVAC system Figure 4 shows an HRV unit provid ing fresh air directly to the return air plenum of a Rooftop heat cool unit Many buildings have a ceiling return air plenum as in Figure 5 Fresh air from the HRV can be intro duced directly into the ceiling space near the air handler s intake In installations where it is satisfactory to provide general exhaust from the space the air to be exhausted may be taken directly from the return air plenum to the HRV as it is drawn back to the air handler Fresh air supplied by the HRV is then introduced directly into the return air plenum but at a location closer to the air handler The air handler would have a constant running blower to effectively distribute the fresh air and remove the stale air Balancing dampers would be located in both the HRV supply and exhaust ducts between the return air plenum and the HRV Electrical Connections System is 208 230V 1 phase 60 Hz This unit meets all local codes and requirements It is STRONGLY recommended that an electrical disconnect be installed prior to the HRV and that it is turned off and locked out before servicing the unit All electrical connections should be made by a qualified electrician Two 2 knock
25. ter from the melted frost collects in the bottom drip pans and drains out through the bottom drain connections The defrost cycle repeats automati cally until the air temperature rises above 27 F 3 C Location The 2500EFD is designed to be mounted outdoors usual ly fastened to a roof curb assembly Special care and attention should be given to positioning the cross mem bers of the roof curb so that they line up exactly with the duct openings on the HRV see pg 7 The 2500IFD must be located in a heated space where the surrounding air temperature does not fall below freezing point The exhaust air temperature must be above 60 F 16 C for proper defrost operation FRESH AIR FROM OUTSIDE FILTERS STALE AIR FROM INSIDE If the air temperature is too low the defrost time may need to be increased The unit must be mounted level horizontal to obtain proper drainage of water from the heat exchange cores and drip pans The warranty will be void if these conditions are not met Typically the HRV is positioned close to an outside wall or the roof to simplify the connections and keep the length of insulated ducting to a minimum A minimum clearance of 40 in 1 m on one side of the HRV is recommended to service the heat exchanger cores and the filters Mounting The 2500EFD is designed to be mounted on a roof curb When assembling the curb note position of cross members which provide duct support Note access thr
26. ter of the weatherhood must be caulked to prevent leakage into the building The design and size of the weatherhoods or louvers chosen by the installer must allow for adequate free area Water and snow penetration of the system is min imized when the airflow does not exceed 750 FPM 3 81m s free area velocity Ducting from the Weatherhoods Galvanized sheet metal ducting with sufficient cross section with an integral single piece vapour barrier should be used to connect the HRV to the weather hoods All ducting must meet ULC Class 1 Fire Rating A minimum R value of insulation should be equal to 4 RSI 0 75 or as stated in local codes A good bead of high quality caulking preferably acoustical sealant and taping with a high quality alu minum foil tape is recommended to seal the duct to both the HRV and the weatherhood Warmside Ducting General Ducting from the HRV to different areas within the building should be galvanized metal whenever possible To minimize airflow losses in the ductwork system all ducts should be as short as possible and with as few bends or elbows as possible 45 elbows are preferred to 90 elbows whenever possible Use Y tees instead of 90 tees whenever possible All duct joints must be fastened securely and wrapped with a quality duct tape to prevent leakage We recom mend aluminum foil tape Stale Air Return System The stale air return system is used to draw air from the points in
27. the building where the worst air quality prob lems occur Balancing dampers and or adjustable grilles are recommended on all return air lines which are used during installation to help balance the draw from different areas of the building Note that the installation schematics show balancing dampers and or adjustable grilles on all return air lines coming back to the unit Alternately the stale air may be drawn directly from the return air duct When this system is used the air handler s blower will need to operate constantly when ventilation is required The exhaust takeoff connection must be at least a meter from a directly connected HRV supply duct if both are connected to the same duct run NOTE See the INSTALLATION WARNING under The Integrated HVAC System on page 16 A damper located just prior to the HRV is required to balance the stale air exhausted with the fresh air supply entering the building Return air suction points should be located at the opposite side of the room to the fresh air inlet The inlets may be located in the ceiling or high on the walls and fitted with inlet grilles Many commercial activities produce air contaminants in the form of dusts fumes mists vapours and gases Contaminants should be controlled at the source so that they are not dispersed through the building nor allowed to increase to toxic concentration levels The heat recovery ventilator allows for economical opera tion of the HVAC syste
28. y supply labour at their own expense or b if the product was purchased from a dealer then the dealer will supply labour at cost to the customer NUTECH reserves the right to replace the entire unit or to refund the original purchase price in lieu of repair NUTECH MAKES NO EXPRESS WARRANTIES EXCEPT FOR THOSE THAT ARE SET FORTH HEREIN AND SHALL NOT BE LIABLE FOR ANY INCIDENTAL SPECIAL OR CONSEQUENTIAL DAMAGES WITH RESPECT TO LIFEBREATH COVERED BY THIS WARRANTY NUTECH S COMPLETE LIABILITY AND THE OWNER S EXCLUSIVE REMEDY BEING LIMITED TO REPAIR OR REPLACEMENT ON THE TERMS STATED HEREIN ANY IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY AND OF FITNESS FOR ANY PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED NO PERSON IS AUTHORIZED TO CHANGE THE WARRANTY IN ANY WAY OR GRANT ANY OTHER WARRANTY UNLESS SUCH CHANGES ARE MADE IN WRITING AND SIGNED BY AN OFFICER OF NUTECH MODEL NO ae 511 McCormick Blvd London Ontario N5W 4C8 Ph 519 457 1904 Fx 519 457 1676 Email nutech lifebreath com ENERGY SYSTEMS INC Website www lifebreath com

Lifebreath 2500IFD User's Manual

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