Lifebreath AH40BHW User's Manual
Contents
1. Bath Tub 1 2 full 21 Whirl Pool 60 tub cap from manufacturer Personal Use 3 Shampooing Hair 5 Clothes Washer hot warm warm warm warm cold Hand Dish Washing Automatic Dish Washer Food Preparation mK KL ML mK Other TOTAL min first hr rating transfer to C 2 27 PART D PROVING REQUIRED WATER FLOW D 1 Effective Length Calculation PUMP Fitting Total EL D 2 Water Flow Rate US GPM D 3 Max Head Press at Water Flow ft of head from specs D 4 Pressure Drop of Water Coil ft of head D 5 Available Head Press ft of head D 3 D 4 D 6 Total Effective Length eff ft from D 1 D 7 Head Loss 100 ft per 100 ft D 5 x 100 D 6 Measured Actual Length Pipe Diameter Total Effective Length Table D 2 TABLE D 1 EQUIVALENT LENGTHS FOR COPPER PIPE FITTINGS straight pipe in feet FITTING EQUIVALENT FITTING EQUIVALENT LENGTH LENGTH Gate Ball Valve open long sweep 90 elbow Globe Valve open 45 elbow Angle Valve open 180 close return Check Valve open standard tee straight through Balance Valve standard tee 90 turn Standard Elbow contraction or enlargement TABLE D 2 HEAD LOSS PER 100 FEET OF EQUIVALENT LENGTH 1 2 inside diameter 5 8 inside diameter 3 4 inside diameter 1 inside diameter FLOW HEAD LOSS HEAD LOSS HEAD LOSS HEAD LOSS US2. A 2 B 1 1 08 x B 3 B 13 Manufacturers Flow Rate Ton cfm ton Supply Air Temperature B 5 B 6 B 14 Cooling Air Flow Rate cfm Water Supply Rate B 15 Circulation Fan Speed Cooling speed from specs Part C EQUIPMENT SELECTION Water Heater DOMESTIC HOT WATER REQUIREMENTS SELECTED WATER HEATER Make Model Minimum Storage Capacity 27 Method A UTOR page SERI 4 Storage Capacity USG Or Note Complete C 5 and C 6 only if C 2 was completed C 5 Recovery USG Minimum First Hour Rating from page 27 Method B C 6 First Hour Rating USG 85 x C 4 C 5 min C 2 SPACE HEATING REQUIREMENTS C BRET C 8 Burner Input Minimum Effective Water C 9 Heater Output B 1 x 1 2 C 10 Recovery Efficiency Effective Water Heater Output Btu h C 8 x C 9 100 min C 3 26 METHOD A domestic hot water usage for C 1 No of Bathrooms No of Bedrooms Nominal Tank Size USG TABLE A 2 OIL No of Bathrooms 2 to 2 5 No of Bedrooms 2 3 3 Nominal Tank Size USG 32 32 32 32 Not suitable for luxury or high volume applications Iflaundry is ensuite for a one bedroom dwelling increase tank size to 40 USG Activity Average Volume per usage USG Times used in Peak Hour Peak hr Usage USG Shower Hi Flow old Low Flow new 5 min 15 4 10 min 30 7 15 min 43 11
3. Manual SMACNA or any other industry recognized manuals Note Combo units normally deliver air at approx 110 F 43 C and therefore may require larger than normal ductwork When installing the Air Handler as a replacement unit on a retrofit application always calcu late the size of duct that is there Any ductwork running through unconditioned space must be sealed properly and insulated to prevent heat loss All local codes must be followed in deter mining the amount of insulation needed Piping The hot water piping between the hot water tank and the Air Handler should be new copper type and should not be treated with chemicals sealant or any thing else that will interfere with the purity of the potable water Only non lead low temperature solder is permitted for sealing copper joints The copper sol dered pipe size for each model is Model AH40DHW 1 2 nominal AH60DHW 3 4 nominal AH40BHW 1 2 nominal AH60BHW 1 2 nominal AH80BHW 1 2 nominal Where possible the length of pipe should not exceed 200 total equivalent length Any piping running through unconditioned space must be insulated toprevent heat loss and possible freezing of the line Stickers indicating direction of flow Supply to fur nace and Return to water heater are labeled on the outside of the cabinet Do not reverse these lines as this wil cause the unit to malfunction For piping conventional water heaters or boilers con nections to and f
4. air temperature Air Handler air flow rate CFM The hot water inlet temperature is typically 140 F 60 C If this temperature must be increased to achieve higher outputs from the furnace an anti scald valve must be used to prevent domestic hot water temperatures above 140 F 60 C The manufacturer of the Hot Water Tank should be consulted for temperatures higher than 140 Hot Water Flow Rate The hot water entering the water coil is the source of heat to the air handler The effect of changing the amount of water entering the coil is the same as changing the water temperature As water flow is reduced the output of the air handler and the air temperature rise will both be lowered Air Handler Return Air Temperature The return air temperature entering the air handler is approx 60 F 33 C below the hot water inlet temperature If the return air temperature entering the air handler is reduced more heat transfer will occur and the output of the air handler will increase Air Handler Air Flow Rate The air entering the air handler can only be warmed by the temperature difference between the hot water and the cool air As the volume CFM L s of air is reduced the amount of heat which can be transferred is also reduced Air Handler Temperature Rise In a fuel fired furnace the combustion gases can be 1000 F 538 C above the return air temperature These units typically have a temperature rise from 50 F 10
5. current room temperature in order to energize the pump and commence the heating cycle If the pump does not start or the Air Handler is not producing heat refer to the Troubleshooting Section in this manual Set room thermostat at desired temperature setting 21 Operation Heating Cooling When the room thermostat calls for heat from the water heater it activates a circulation pump locat ed inside the Air Handler This pump delivers hot water through the furnace coil and back to the water tank boiler Simultaneously the furnace blower switches on to high speed and will start circulating air across the coil which picks up heat and delivers it to the rest of your home Once the thermostat s temperature is reached the pump will shut off and the blower will return to its pre set speed or off Note When the furnace blower is left running on low speed the air in the home circulates continuous ly When the heat is called for the blower will automatically switch to a higher speed After the required hot air has been delivered the blower will switch back to low speed When the thermostat calls for cooling optional A coil and condensing unit required the furnace blower activates to high speed and the outdoor condenser unit is energized After the thermostat temperature is reached the condensing unit will shut off and the blower will return to it s continu ous setting Continuous low speed can be selected by a qualified e
6. heated by a conventional furnace One reason for this is that LIFEBREATH s hydronically heated air is uniform and temperate no short blasts of hot air or hot and cold temperature spikes In this regard the air flowing from your hot air vents will not feel as hot to the touch as air from a conventional furnace With a high efficiency adequately sized hot water heater boiler you will always have plenty of hot water for showers and baths washing dishes and clothes and all other normal domestic hot water needs If there is an unusually high demand for hot water such as filling a large hot tub than all you need to do is allow more time for the task so the water heater boiler can keep up to its job of providing hot water for the heating system as well as other household uses Once it is correctly installed safety will never be an issue with your LIFEBREATH Air Handler No flames fumes or flue gases to be concerned about Your domestic hot water heater boiler now provides the heat source for your air handler This Operating and Installation Guide will help you learn about your LIFEBREATH Air Handler quickly and easily The table of contents will show you where to find information on every feature of this unit along with easy to understand operating instructions If however you do encounter a question that is not cov ered in this Guide you should call the LIFEBREATH dealer who installed your air handler Chances are that he will be able to give y
7. it is strongly recommended to use the top water tappings as indicated in Figure 1 to minimize thermal siphoning and related issues For further information please contact Technical Support 519 457 1904 18 Electrical The Air Handler operates at 120V singles phase Caution should be used if installing a setback and draws anywhere from 2 8 7 amps thermostat to control the system If the depending on fan speed thermostat is set back too far and for example is set to call for a lot of heat when you get out of The low voltage thermostat not provided bed at which time showering and general water connects to the amp W terminals for heating and Use is at its peak then the hot water heater may the R 8 Y amp C terminals when calling for cooling not keep up Air Handler Wiring Diagram R W Heat R G Fan Only optional dehumidistat G R Y C PUMP TIMER OPTIONAL I 1 JUMPER I 1 I TEMPERATURE 1 SENSOR NEUTRAL 24VAC THERMOSTAT CONNECTIONS Field Connection Wire Nut C 2 Select NOTE Units with an Optional Pump Timer do not get an Optional Temperature Sensor Speed MED HIGH blue ion Wire Nut U To change fan speed move bottom wires on the speed select terminal block to the high med hi or med location 1 2 3 4 8 I CAPACITORS il AH 02 Note Unit is shipped FAN MOTOR 0211 on
8. 0 Start Up Procedure In order for any appliance to work properly it must be set up and tested by a knowledgeable technician The following conditions must be met prior to start up 1 Ensure that connecting water lines are purged and free of debris Caution solder or other debris may cause the furnace pump or check valve to malfunction Blower wheel rotates freely inside its housing Wiring connections are tight All duct and pipe connections are sealed Check that all packaging is removed Front access door is on tight Fan speed selection Heating Cooling factory setting is at high speed and can be changed in the electrical box to medium high or medium if required Once all of the necessary connections have been made the Air Handler Start Up Procedure is as follows Close shut off valves separating the Air Handler from the water heater boiler Set up water heater boiler according to manufacturer s instructions Purge air from unit To do so open the supply shut off valve to the furnace Attach a garden hose to drain valve and drain water until you get a continuous flow Close the drain valve and purge the pump To purge the air from the pump turn the large screw on the face of the pump counterclockwise until water leaks out then tighten Open the supply shut off valve Turn on power supply to Air Handler Caution blower will start to operate Switch the room thermostat to heat The thermostat should be set higher than the
9. 1048 594 695 797 89 9 1001 110 3 e 1120 500 587 672 759 845 932 545 639 732 826 920 101 5 574 671 769 868 966 106 5 890 439 514 600 665 741 817 4691 549 629 70 9 790 87 1 487 569 653 735 818 67 8 382 707 373 62 8 692 v ES Temp 3 4 5 Dimensions amp Clearances Model AH60DHW Top A Side Front alba i ela Voltage 120 VAC 60 Hz Hp 1 2 19 17 25 Supply Air Amps total 8 7 Water 3 4 Copper Soldered Connections Connection A lt 22 32 5 Oy Airflow High ua 29 5 gt 25 in wg 14 Return Air Rower Secion 5 in wg 1180 CFM Net Weight 121 lbs ns Shipping 140 lbs i 29 5 i4 19 Weight Note Return plenum opening SERVICE CLEARANCE 1 SERVICE CLEARANCE 3 available off either side of cabinet All units conform to CSA and UL Standards Warranty Units carry a five year replacement parts warranty on all components 13 25 CFM 5 WG Specifications Model AH40BHW Filters 1 pleated in return plenum side Case Prepainted galvanized steel for superior corrosion resistance AH40BHW Output MBH 1075 1040 975 880 1280 1200 1000 1020 Temp 130 140 150 160 170 180 130 140 150 160 170 180 130 140 150
10. 160 170 180 3 GPM 4 5 Dimensions amp Clearances Model AHAOBHW 16 Side Font Voltage 120 VAC 60 Hz i i Hp 1 3 Amps total 7 19 17 25 Water 1 2 Copper Soldered Connections Connection Airflow High E LERRA 2 gt es 25 in de di 1280 CEM 29 5 gt 5 in wg 1075 CFM 14 Return Air Blower Section Net Weight 111 lbs Shipping 130 lbs tus Weight 14 29 5 le 19 gt Note Return plenum opening i available off either side of SERVICE CLEARANCE 1 SERVICE CLEARANCE 3 cabinet All units conform to CSA and UL Standards Warranty Units carry a five year replacement parts warranty on all components 14 Specifications Model AH60BHW Filters 1 pleated in return plenum side Case Prepainted galvanized steel for superior corrosion resistance AH60BHW Output MBH 25 WG CFMQG 5 WG ans A ee a 3 4 Dimensions amp Clearances 5 Model AH60BHW 120 VAC 60 Hz 1 2 8 7 1 2 Copper Soldered Connection 1402 CEM 1220 CFM 121 lbs Top ped el Side Front Sl E o Voltage 19 1725 Supply Air Amps total Water Connections Y ES 595 zx 32 5 sa Airflow High Di 29 5 44 Blower Section 25 Return Air 3 in
11. Air Handler Output at F 1 Condition Air Handler Operating CFM from specs Return Air Temperature measured Required Air Temperature Difference 2 x 1 08 Air Handler output 30 Supply Air temp Btu h Eff Water Heater output Fan speed Return Air temp Required Supply Air Temperature F4 ES Returned Water Temperature E measured Water Temperature Difference F min 20 F El E7 Actual Supply Air Temperature F measured Anti Scald Valve if present Outlet Temperature measured 31 511 McCormick Blvd 270 Regency Ridge Suite 210 London Ontario N5W 4C8 Dayton Ohio 45459 T 519 457 1904 T 937 439 6676 BRANDS INC F 519 457 1676 F 937 439 6685 9001 hi Email nutech lifebreath com Website www lifebreath com REGISTERED NU
12. C to 90 F 32 C and therefore delivers air at the diffuser at 120 F 49 C to 160 F 71 C With an Integrated Combo System the hot water temperature is approx 130 F 54 C which is 60 F 15 5 C above the return air temperature These units typically have a temperature rise of 35 F 2 C to 40 F 4 C and therefore would deliver air at the diffuser at approximately 105 F 40 5 C to 110 F 43 C Design vs Field Conditions The factors discussed above become very important to consumer comfort Even small differences between design parameters and actual field conditions can impact greatly on output capacity Therefore it is important to do a thorough and complete commissioning of the integrated combo system to ensure the design parameters are met Water System Pressures Within the water system of an Integrated Combo system there are three terms that the designer installer must understand These are head pressure water flow rate and pressure drop Head Pressure Head pressure is the pressure created by the circulation pump to push water through the piping system It is this pressure which is used to overcome the resistance to water flow friction caused by the water pipe and fittings It is similar in concept to the external static pressure in an air duct system Head pressure is measured in feet or water millimeters of water Note Although the water in the combo system is pressurized by the domestic water
13. GPM FT 100FT FT 100FT FT 100FT FT 100FT ja a N gt N ojl 28 COMMISSIONING OF INTEGRATED COMBO SYSTEM Training Courses and Forms are available from HRAI Skill Tech Academy 1 800 267 2231 Designer Signature Phone Submitted For Owner By Contractor Address Address City City Postal Code Postal Code Phone Phone INSTALLED EQUIPMENT Water Heater make amp model as designed Throttling Valve Air Handler make amp model as designed Anti scalding Valve Cooling Unit make amp model as designed Back Flow Prevention Valve Filter type and size as designed Expansion Tank 2 shut off valves for heating loop Off Season Circulation Controls Check Valve Other Drain Valve 29 Part E SYSTEM START UP Fill Water Heater with water Set Water Heater at designed temperature Fill Heating Loop with water Purge Circulation Pump Start Air Handler Check Circulation Pump Operation Check Circulation Fan Operation Label Water Heater Part F SYSTEM COMMISSIONING Design Information Information for this section can be found on the Worksheet for Integrated Combo System Design part B Total Heat Loss Btu h Air Handler ESP ins W C Air Flow rate Supply Water temp F Return Water temp Supply Water Temp measured
14. MATIC SYSTEM ni DIAGRAM Open System Note Plumbing components and system configuration may vary from diagram portrayed Refer to local codes local bylaws and installation manuals supplied with water heater before starting any installation work SUPPLY AIR COOLING COIL TTT OPTIONAL Therefore an expansion tank or equivalent device may be installed as part of any closed system The operations of the valve and expansion tank are discussed later in this section of this manual Note Water systems that incorporate a pressure tank well systems are normally open systems SCHEMATIC SYSTEM DIAGRAM Closed Loop System DOMESTIC HOT WATER ANTI SCALD VALVE SUPPLY AIR COOLING COIL WHEN REQUIRED OPTIONAL VALVE shut off y RETURN AIR O VALVE balancing check VALVE WATER HEATER HEATING COIL BLOWER Call for Space Heating Only Operation When the thermostat calls for heat the circulation pump is activated and hot water is drawn from the top of the water heater through the air handler and then returned to the water heater There should be at least a 20 F 11 C temperature drop between the hot water supplied to the air handler and the returning water temperature If the temperature drop is less then 20 F 11 C two things may happen 1 Mixing of warm return water with the hot water within the water heater no tank stratification which will result in a lower hot w
15. OPERATION SIZING AND INSTALLATION MANUAL NOW WITH FIVE YEAR WARRANTY ON PARTS AND ACCESSORIES For Models AH40DHW AH60DHW AH40BHW AH60BHW AH80BHW TO BE COMPLETED BY CONTRACTOR AFTER INSTALLATION Installing Contractor Telephone Contact Serial Number Installation Date ISO EN LEAVE FOR HOMEOWNER e FW NOTE D i h and product devel ifications 9001 27 W 0000 o eo ds ARAL AH 01 1203 Table of Contents gums M o 3 Description and Purpose nile 4 Combo System Basic Principle aaa 5 SpeciticatiON S sucus ned sida 12 16 INSIGNA eT E 17 is D E 18 Ed iii 19 Optional Dehumidistat sp iii 20 Start UD Procedure 21 A te CRP e eee eee ere A ete RENE eye ee ntee eee eee 22 Troubleshooting ala 23 System COMM SS ON N M 24 Work NS t A 25 30 Introduction Congratulations on your selection of the LIFEBREATH Air Handler This is a very advanced unit that combines the outstanding efficiency and economy of the water heater airhandler concept With the addition of LIFEBREATH Turbulent Flow Precipitator TFP Air Cleaner optional you will have the ultimate in comfort and healthy indoor air quality You will notice that the heated air in your home feels more comfortable than air
16. ater supply temperature 2 A water heater thermostat temperature differential between on and off is approximately 18 F 10 C Therefore if the return water is not cool enough it may not activate the water heater thermostat which causes the burner to operate All of the water in the water heater will be cooled before the burner begins to operate This may cause large swings in the delivered hot water temperature causing poor space heating performance fluctuating domestic water temperatures and effectively reducing the supply of domestic hot water Call for Domestic Hot Water and Space Heating Operation When both return water from the space heating loop and new cold water replacing domestic water being used enters the water heater the mixed entering water is cool enough to activate the thermostat quickly In this situation the water heater must be capable of satisfying the combined need for hot water domestic hot water and space heating at the same time Air System A circulation fan draws cool house air at approx 70 F 21 C from the return ductwork forces it through the water coil where it is heated and then distributes it to the various rooms of the house through the supply ductwork Water Piping The Piping and fittings used to connect the water heater and air handler must be sized to handle the volume of hot water required by the air handler within the pressure limitations of the circulation pump pip
17. high speed Optional Dehumidistat An optional dehumidistat can be connected to the furnace to help eliminate excessive moisture during the heating season When the dehumidistat senses moisture in excess of the control setpoint the blower will be overridden into high speed This will increase the ventilation airflow and create a dehumidification affect Typical settings are between 30 40 during the winter and OFF for all other seasons The dehumidistat will connect to R amp G terminals on the furnace Part 99 130W Note Do not use dehumidistat for hot southern climates When using a Dehumidistat or Interface Relay to initiate high speed blower operation on a furnace certain thermostats will initiate the outdoor cooling condenser when R and G are closed Use this wiring configuration to stop the Dehumidistat from initializing the condenser unit This problem can occur at the thermostat because the Y terminal is connected to the G terminal internal to the stat When R and G are closed at the furnace by dehumidistat or relay 24 Volts is sent to G at thermostat 24 Volts is then sent through Y which will initiate outdoor condenser The relay will isolate this problem NOTE This problem does not occur with all thermostats therefore it is important to fully commission the installation to determine if this relay configuration is required Interface Relay or Dehumidistat Furnace TB 102 1099 2
18. ing fittings solders and fluxes must be acceptable for use with domestic hot water Note Chemicals such as boiler system additives cannot be added to the system because water passing through the heating loop re enters the domestic water systems Circulation Pump The circulation pump is factory installed within the air handler The water flow rate will vary depending on the pumps performance and the head pressure resistance of the complete heating loop system Manual Valves There are a number of manual valves required for the system to operate properly and safely These valves are used as shut off valves drain valves and throttling valves They can be globe gate ball or balancing type valves The globe valve can be used as a shut off drain or throttling valve Even in the open position the valve is fairly restrictive to flow It has a much greater equivalent length resistance than the other types of valves The gate valve can be used as a shut off or drain valve When in the open position there is very little resistance to flow Gate valves have a greater susceptibility to chatter noise and a Balance Valve Ball Valve malfunction with age Gate valves tend to be less expensive than the other type of valves The ball valve can be used as a shut off or drain valve but not a throttling balancing valve When in the open position a full bore ball valve has very little resistance to flow and these val
19. inlet and outlet pipe connec tions are not reversed Ensure that there are no other restrictions in the water lines such as faulty valves or debris 23 Pump is noisy Pumps can become noisy when air remaining in the lines interfere with their operation If this occurs re purge the system as indicated in the Start Up Procedure During cooling cycle hot water cir culates through the coil If the check valve inside the cabinet is stuck in the open position hot water may infiltrate the heating coil This occurs when the hot pipes are not capped off during installation or service and for eign debris enters the piping This debris can set tle under the check valve seat and permit hot water to flow into the coil The problem can be cor rected by repeatedly flushing the heating loop until it is clean System Commissioning This section of the manual is designed to be used with the Commissioning of Integrated Combo System worksheet The worksheet is designed to guide you through the start up process in a logi cal step by step method which should minimize the work and time involved in having the system meet the designed parameters The following conditions are assumed Total Head in Feet The air filter is in place supply diffusers and return grilles are fully open and unrestricte Hot water is available to the furnace The drain valve for the heating loop is closed The shut off valves for the heating
20. ized steel for superior corrosion resistance gt 800 in e 790 740 660 o 1030 900 825 740 130 140 150 160 170 180 130 140 150 160 170 180 130 140 150 160 170 180 3 GPM 4 5 Dimensions amp Clearances Model AHAODHW 16 m Top Side Front uu Voltage 120 VAC 60 Hz i E Hp 1 3 Amps total 7 19 11 25 SUPPI AI Water 1 2 Copper Soldered Connections Connection Airflow High Moo 22 m 25 in a A 1030 CFM La 29 5 14 Blower Section a POM Return Air Net Weight 111 lbs Shipping 130 Ibs m Weight lt 29 5 gt le 19 gt Note Return plenum opening available off either side of cabinet All units conform to CSA and UL Standards Warranty SERVICE CLEARANCE 1 SERVICE CLEARANCE 3 Units carry a five year replacement parts warranty on all components 12 Specifications Filters Case 1 pleated in return plenum side AH60DHW OUTPUT MBH Prepainted galvanized steel for superior corrosion resistance Model AH60DHW g 1180 514 602 690 779 8681 958 563 659 756 853 950
21. lectrician 22 Optional Circulation Timer Models Some models are equipped with a circulation timer It is normal operation for these models to automatically run the circulation pump for a short period of time intermittently Continuous Low Speed Hook Up Continuous low speed can be selected by con necting the red wire from the blower to the N C contact on the relay as indicated on the wiring diagram Troubleshooting Lack of heat 1 Check that the room thermostat is set to the desired temperature Confirm the units have power and the shut off valves are open Ensure there is power to the unit and that the pump is working If the pump is not working properly it may be stuck Disconnect power and remove screw in center face of the pump Using a screwdriver turn the pump shaft sev eral times to free it from sticking Replace center screw and re connect power If pump still fails to start it may require replacement Confirm that the hot water heater is working and that hot water is entering the Air Handler Verify that the airflow in and out of the system matches designed specs If is low check for blockage in the filter or some other obstruction Make sure your water heater is sized large enough for heat load of house and for domes tic hot water use Air may still be in the water lines If so re purge the system according to the start procedure up Confirm that the
22. loop are fully open The throttling valve for the heating loop if applicable is fully opened Electrical power is available at the furnace The return air temperature from the house is approximately 70 F 21 C Water Pump Performance Specifications 2 Capacity on U S gpm Total Head in Feet 24 Model 60 16 WORKSHEET FOR INTEGRATED COMBO SYSTEM DESIGN Training Courses and Forms are available from HRAI Skill Tech Academy 1 800 267 2231 Designer Signature Phone Submitted For Owner By Contractor Address Address City S City Postal Code Postal Code Phone Phone DESIGNED EQUIPMENT DESIGNED EQUIPMENT Cooling Back Flow Prevention Valve Central Air Conditioner Expansion Tank Heat Pump Anti scald Valve VENTILATION SYSTEM Throttle Valve Off Season Circulation Controls Other 25 Part A DESIGN LOAD SPECIFICATIONS A 1 Total Heat Loss A 2 Total Heat Gain Part B EQUIPMENT SELECTION Air Handler and Cooling AIR HANDLER Make LIFEBREATH Model Heating Output 9 Water Supply Temperature F 110 140 of A 1 Water Temperature Drop F min 20 F Equipment External Static Pressure B 1 500 4 x B 8 from specs Water Return Temperature Heating Air Flow Rate B 9 B 10 Circulation Fan Speed Heating COOLING EQUIPMENT Return Air Temperature B 12 Cooling Output Btu h Air Handler Temperature Rise 8096 12596 of
23. oper design installation and commissioning of these systems is critical if these advantages are to be realized This manual provides a guideline of good engi neering practice in the design installation and commissioning of Integrated Combo Systems The guidelines in the manual are designed for res idential forced warm air Integrated Combo Systems which utilize domestic water heaters or boilers and the LIFEBREATH furnace Heating and cooling loads shall be calculated in accor dance with recognized Residential Heat Loss and Heat Gain Calculation methods Duct design shall com ply with recognized Residential Air System Design methods This manual provides worksheets to be used for the purpose of sizing residential water heaters and the combo furnace Combo System Basic Principles Closed Open Combo System From the aspect of delivery of domestic hot water and space heating the Open and Closed systems operate the same A system becomes closed when a backflow prevention valve or check valve is installed in the cold water piping upstream of the water heater A backflow prevention valve will prevent the pressure created when water is heated in the water heater from being relieved into the cold water system COLD WATER INLET DOMESTIC HOT WATER CHECK ANTI SCALD VALVE WHEN REQUIRED EXPANSION TANK VALVE OR OTHER MEANS shut off WHEN REQUIRED i O VALVE shut off balancing WATER HEATER COLD WATER INLET SCHE
24. ou a satisfactory answer but if he is unable to do so then we invite you to contact us directly Nutech Brands Inc Description and Purpose IMPORTANT NOTE The purpose of this manual is to act as an instal lation guide only for the LIFEBREATH Air Handler Manufacturers instructions for other components such as the waterheater boiler must be followed All national and local code requirements must be met when installing a LIFEBREATH Air Handler Be sure to consult the proper authorities Note Temperatures greater than 130 54 C pose a serious risk of scalding individuals running domestic hot water for potable use This appliance complies with IAS Canada Inc Requirement CR95 003 Additional Requirements for Fan Coil Units for use with Potable Water Heaters All piping and components connected to this appli ance shall be suitable for use with potable water Toxic chemicals such as used for boiler treat ment shall not be introduced into the potable water heater system When using this system and water for space heating is required to be at a higher temperature than for other uses an anti scald valve shall be used to ensure water for other uses is reduced in temperature to minimize a scald hazard potential Combining two or more end uses such as space heating and the heating of domestic hot water in a single system has the potential to increase effi ciency and reduce overall capital costs However the pr
25. rom the Air Handler to the heater should be made at the point where the pipes leave the heater vertically A T fitting used in each vertical line with the Air Handler piping connected to the hor izontal side of this fitting will work best in avoiding air locks in the circulation pump of the furnace Note Remove all shipping packaging and discard Plumbing In order to improve serviceability of our products the check valve is included with our manual kit for field installation between the air handler and hot water source The check valve should be installed in a vertical run of pipe with the flow of water in an upward direction An arrow on the check valve indicates its correct orientation and must match the direction of water flow Figure 1 Water Heater Figure 2 This will allow for ease of service to remove any installation debris or service required due to extended hard water conditions Note Take care during soldering to avoid debris or solder from lodging in the check valve Note It is critical to follow the piping configuration shown Maintain a minimum distance of 12 above the CAFIAH This will minimize thermal siphoning in the combo system Min 12 above top of CAF AH Min 12 above top of CAF AH Water Heater It should be noted that problems have been observed when using the side tappings on certain water heaters therefore
26. system the pump is required to create water flow in the heating loop The domestic water system applies the same pressure to the supply and return sides of heating loop Note The vertical height of the heating loop does not impact on the head pressure as the pressure required to push the water up the vertical height is offset by the weight of the water in the vertical drop on the other side of the heating loop Flow Rate Flow rate is the amount of water flowing in the system It is directly related to the head pres sure and the resistance to flow Flow rate is measured in gallons per minute liters per minute Pressure Drop PD Pressure drop PD is the reduction in total pressure caused by components added to a piping system such as coils valves and fittings The measurement of pressure drop is the difference in pressure on the inlet side of the component and the outlet side Pressure drop is measured in feet of water millimeters of water When connecting the water lines for heating loop air handler to the domestic water system the pipes should be connected with a tee to the side of a vertical domestic water pipe or the bottom of a horizontal domestic water pipe This is to help prevent air from entering the heating loop The connections should be as near as practical to the water heater Specifications Filters Case 1 pleated in return plenum side AH40DHW OUTPUT MBH Model AH40DHW Prepainted galvan
27. thermostat controlling the room air temperature Water Heater Thermostat The water heater thermostat is set by the installing contractor to provide the required temperature at the hot water outlet of the water heater It is important that a warning label be place near the water heater thermostat telling the homeowner not to change the thermostat setting The label is included with the furnace Room Thermostat The room thermostat controls both the water circulation pump and the air circulation fan It should be on a centrally located inside wall away from any source of heat such as diffusers appliances and direct sunlight Energy Saving Room Thermostat A set back thermostat or smart stat can be used with a combo system but care must be taken in the timing of the temperature changes The timing of morning warm up should be early enough that the desired air temperature has been reached before the people begin to use domestic hot water The highest demand for space heating is during the morning warm up and the highest demand for domestic hot water is during morning showers Even if the water heater is properly sized it may not be able to meet this combined load Therefore large set backs should be avoided Air Handler Output Capacity There are four factors that will significantly affect the heating output of the air handler They are Hot water supply temperature EWT e Hot water flow rate GPM e Air Handler return
28. ts warranty on all components 16 Installation The purpose of this manual is to give the contractor guidelines for installing the LIFEBREATH Air Handler All national and local codes relating to this type of equipment must be followed Locating The Unit The Air Handler is designed to be installed vertically in a conditioned space where the surrounding temperature does not fall below 50 F 10 C Attic installations are not recommended Typically the unit is installed in a mechanical area of the basement or other partitioned mechanical room elsewhere in the home Sufficient clearance around the unit is required for service of the filter and components As a rule this unit should be installed adjacent to the hot water heater If this is not possible or if the piping layout is complex the total head pressure on the pump should be calculated Duct Connections To accommodate various installations the Air Handler has knockouts for the return air plenum on both sides of the cabinet Special care and attention should be given to determining which knockouts are to be removed Penetrations from sheet metal screws used to fasten the ductwork to the cabinet of the unit should only be placed into the duct flange provided This is to avoid contact and damage of the heating air conditioning coils and internal wiring Ducting The duct sizing for the furnace section can be deter mined using HRAI Residential Air System Design
29. valve may be required for all installations by the authority having jurisdiction The valve is placed in the hot water supply pip ing from the water heater downstream of the heating loop connection and upstream of any domestic hot water connection The purpose of the valve is to limit the maximum temperature available for domestic hot water by mixing hot water from the water heater with cold water from the municipal supply The Anti Scald valve must be thermostatically controlled and approved to the ASSE standard No 1016 and 1017 for use as an anti scald device Note There are a number of pressure balancing valves and mixing valves on the market which are not certified as a anti scalding device Time to Scald 1st degree burns Off Season Circulation Controls Models with a T in the model number Although the UCG Unified Canadian Guideline does not require these controls a few building codes and municipal by laws do They are used to provide periodic circulation of water through the space heating loop during the summer and other periods of infrequent use The concern is that water which remains stationary in the heating loop during the summer may be less than desirable as domestic hot water when it is returned to the water heater at system startup in the fall Thermostats There are two thermostats controlling every combo system the water heater thermostat controlling the hot water temperature and the room
30. ve and is preferred to be near the water heater Throttling Valve The throttling balancing valve is used to reduce the water flow rate and thereby increase the water temperature drop This is done to ensure proper activation of the water heater thermostat This valve should be a globe or balancing valve Check Valves A spring loaded check valve is required in the heating loop to help minimize thermo siphoning of hot water throughout the heating loop when heating is not called for and cold water back flowing through the heating loop when domestic hot water is used The valve will have a water flow direction arrow marked it s exterior surface and must be installed with that arrow pointing downstream CHECK VALVE Check valves should always be installed in a vertical rise with the flow of water shown Expansion Tanks Expansion tanks are only required for Closed Systems The expansion tank has an air bladder which will contract to relieve pressure in the system Pressure is created in the closed system when water is heated in the water heater Expansion tanks should always be connected to the cold water piping between the water heater shut off valve and the cold water inlet to the water heater Follow manufacturers instructions for sizing and installation air cushion EXPANSION TANKS Anti Scald Valve An anti scald valve is required when the water heater thermostat is set above 140 F 60 C Also an anti scald
31. ves tend to be both the least expensive and the least susceptible to seizing over time Do not use reduced bore ball valves as they are very restrictive to water flow The balancing valve can be used as a throttling valve It can make small flow changes easily and has lower resistance than a globe valve This valve will be considerable more expensive Globe Valve Gate Valve n Shut Off Valves There are 3 shut off valves required for integrated combo system as follows One valve a on the cold water side of the water heater upstream of the heating loop con nection This valve has the ability to isolate the hot water domestic and space heating from the household cold water supply This valve is required on every waterheater whether or not the water heater is used for space heating One valve b on the hot water supply side of the heating loop downstream of its connection to the domestic water One valve c on the return side of the heating loop upstream of its connection to the domes tic cold water The two valves in the heating loop allow the heating loop to be isolated for service or repair c Return SHUT OFF VALVES Drain Valve A drain valve is required to allow the heating loop to be drained for service or repair and to remove air from the heating loop when commissioning a system The drain valve should be near the low point of the return piping system upstream of the shut off val
32. wg Net Weight l s Shipping i 29 5 gt ie 19 gt Weight Note Return plenum opening SERVICE CLEARANCE 1 SERVICE CLEARANCE 3 available off either side of cabinet All units conform to CSA and UL Standards Warranty Units carry a five year replacement parts warranty on all components 15 140 lbs CFMO 25 WG 5 WG Specifications Model AH80BHW Filters 1 pleated in return plenum side Case Prepainted galvanized steel for superior corrosion resistance AH80BHW Output MBH 1639 69 7 40 7 75 5 42 8 1618 40 4 75 0 425 1575 39 9 740 419 1967 1868 1728 Water 130 140 150 160 170 180 1 130 140 150 160 170 180 130 140 150 160 170 180 emp 3 4GPM 5 Dimensions amp Clearances Top 7 Side Front Model AHBOBHW E EET o o FE Voltage 120 VAC 60 Hz 19 1725 Supply Air Hp 1 2 Amps total 8 7 seas Water 1 2 Copper Soldered l 22 36 5 Connections Connection ra 29 5 gt i Airflow High 18 Return Air Blower Section 197 CEN Net Weight 135 Ibs Y ua Eu Sh 155 lbs i 29 5 gt ie 19 Weight Note Return plenum opening SERVICE CLEARANCE 1 SERVICE CLEARANCE 3 available off either side of cabinet All units conform to CSA and UL Standards Warranty Units carry a five year replacement par
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