Installation, Start--up, and Operating Instructions
Contents
1. A05347 Fig 16 ERV Ports on Side Bottom View reen 1 2 A 1 2 Y 4 Blower Speed Selection Three speed blowers are factory connected to electronic control board on HIGH and LOW speed taps of blowers Installer can easily change low speed tap to medium speed tap so electronic control will select between high and medium speed Connections can be changed at motor location See Table 6 and 7 To change low speed to medium speed proceed as follows 1 Unplug unit from 115vac 2 Locate blower assembly 3 Locate red wire anb lue wire coming from blower assembly 4 Unplug red wire from quick connect 5 Unplug protecting cap guick connection from blue wire and put on red wire coming from blower The cap is a safety insulator 6 Connect red wire of main harness to blue wire 7 Replace wires A05348 Fig 17 HRV Ports on Side Bottom View 11 ERV HRV Table 6 Temperature Ohm Relationship ERV HRV Temp deg C2. The ERV HRV wall control has 4 basic modes of operation OFF LOW HIGH and INTERMITTENT Be sure that all modes of operation are fully functional See Table 1 indicating standard control operation 1 With switch off ERV HRV is inoperative and the LED is out 2 With switch on LOW ERV HRV continuously exchanges air with outside If control is satisfied blower will run in low speed otherwise blower will run on high speed The LED is illuminated all the time 3 With switch on INTERMITTENT the ERV HRV exchanges air with outside on high speed blower and unit shuts down when control is satisfied The ON LED is illuminated all the time and AIR EXCHANGE LED is illuminated only when unit is running This mode is ideal for maintaining proper humidity levels when no one is home Step 4 Humidity Selector The humidity selector is a built in control designed to properly control the level of humidity in the house during the winter months This control helps avoid condensation problems in upper northern regions where indoor humidity is a problem during the winter season NOTE This control is not to be confused with a dehumidistat used during the summer months to control high relative indoor humidity Table 2 recommends humidity levels to avoid condensation Step 5 OneTouch Control The OneTouch control can be used as the primary wall control for the ERV HRV This control will step through the modes of operation with consecuti
3. K2 and K5 relays are de energized This keeps low speed contacts closed and high speed contacts open on K2 relay and opens outdoor air damper 120vac is applied between Red and Gray wires on Molex plug pins 1 and 4 and blower motor runs in low speed operation A WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Before installing or servicing system always turn off main power to system There may be more than 1 disconnect switch A CAUTION CUT HAZARD Failure to follow this caution may result in personal injury Sheet metal parts may have sharp edges or burrs Use care and wear appropriate protective clothing and gloves when handling parts CARE AND MAINTENANCE 1 Door ERV HRV door can be removed by unlatching brief case style latches then slide door to the right and remove it from hinges Door must be in place and secured shut for proper operation 2 Filter Filters in ERV HRV are washable and should be cleaned every 3 months Use a vacuum cleaner to remove heaviest portion of accumulated dust then wash in lukewarm water Allow filter to completely dry before reinstalling A dirty air filter will cause excessive strain on blower motor Never operate unit without a filter Vacuum out debris In addition regularly check and clean screens on exterior intake and exhaust hoods when necessary A CAUTION UNIT COMPONENT DAMAGE HAZARD Failure to fol
4. HAZARD Failure to follow this caution may result in equipment damage or improper operation Do not install ERV HRV in a corrosive or contaminated atmosphere Step 1 Mount Unit The ERV HRV can be suspended from floor joists using chains and 4 springs Attach metal hanging bracket to all 4 sides of cabinet See Fig 4 The unit may be installed on a shelf if an isolation pad is provided to dampen vibration Unit should always be installed as level as possible Step 2 Independent System Application In the absence of a forced air system and a typical duct system layout the ERV HRV can be applied as an independent or stand alone unit To ensure comfort this type of application involves running both fresh air and return air registers or stale air pickup registers throughout the home Fresh air registers are normally located in bedrooms dining room living room and basement It is recommended that registers be placed 6 to 12 in from the ceiling on an interior wall and airflow directed toward ceiling If registers are floor installed airflow should be directed toward the wall A05331 Fig 4 Chain Spring Installation 4 WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow this warning could result in personal injury or death Do not install return air registers or stale air pickup registers in same room as gas furnace or water heater Return air or stale air pickup registers are normally loca
5. Rst k Ohms Temp deg C Rst k Ohms 50 329 5 45 4 911 49 310 9 46 4 749 48 293 5 47 4 593 47 277 2 48 4 443 46 262 0 49 4 299 45 247 7 50 4 160 44 234 3 51 4 026 438 221 7 52 3 896 a42 209 9 53 3771 4i 198 9 54 3 651 40 188 5 55 3 536 39 178 5 56 3 425 38 169 0 57 3 318 37 160 2 58 3 215 36 151 9 59 3 116 35 144 1 60 3 020 34 136 7 61 2 927 33 129 8 62 2 838 32 123 3 63 2 751 31 117 1 64 2 668 30 111 3 65 2 588 29 105 7 66 2511 28 100 5 67 2 436 27 95 52 68 2 364 26 90 84 69 2 295 25 86 43 70 2 228 24 82 26 71 2 163 3 78 33 72 2 100 22 74 61 73 2 039 71 10 74 1 980 20 67 77 75 1 924 19 64 57 76 1 869 18 61 54 77 1 816 247 58 68 78 1 765 16 55 97 79 T716 15 53 41 80 1 668 14 50 98 81 1 622 13 48 68 82 1 577 12 46 50 83 1 533 11 44 43 84 1 492 10 42 47 85 1451 9 40 57 86 1 412 8 38 77 87 1 373 F 37 06 88 1 336 6 35 44 89 1 301 5 33 90 90 1 266 4 32 44 91 1 232 3 31 05 92 1 200 2 29 73 93 1 168 f 28 48 94 1 137 0 27 28 95 1 108 1 26 13 96 1 079 2 25 03 97 1 051 3 23 99 98 1 024 4 23 00 99 0 9984 5 22 05 100 0 9731 6 21 15 101 0 9484 7 20 30 102 0 9246 8 19 48 103 0 9014 9 18 70 104 0 8789 10 17 96 105 0 8572 1i 17 24 12 16 56 13 15 90 14 15 28 15 14 69 Table 7 Temperature and Voltage 16 14 12 17 13 58 18 13 06 Voltage DC Volts J4 20 1209 c BEDS ur Best 20 12 09 22 11 20 23 10 78 EO RS 24 1
6. required Insulated flexible duct is required on both fresh air inlet and exhaust air outlet ducts connecting to exterior wall When using insulated flexible duct the vapor barrier of the flexible ducts must be taped very tight to prevent condensation problems To reduce pressure drop stretch the flex duct and support it in a proper manner to avoid reduced airflow When connecting the ERV HRV to a return air duct system insulated flexible duct can be used However when metal or rigid ducts are applied use approximately 18 in of flexible duct at ERV HRV ports for fresh air supply and stale air return When using metal duct from fresh air supply to system duct work the metal duct should be insulated See Fig 5 This can act as a silencer when connecting ducts to return air duct system This should eliminate transmission of noise or vibration from unit to main duct system FLEXIBLE DUCT FRESH AIR STALE AIR SUPPLY RETURN i eR DUCTS CONNECTING TO RETURN AIR DUCT SYSTEM A98382 Fig 5 Flexible Duct Fit Up Step 5 Locate and Install Exterior Hoods IMPORTANT To prevent condensation problems insulated flexible ducts are required on both fresh air inlet and exhaust air outlet ducts connecting between ERV HRV and exterior wall Fresh air intake and stale air exhaust must be separated by at least 6 ft Fresh air intake must be positioned at least 10 ft from nearest dryer vent furnace exhaust driveway gas me
7. the edges to see if they appear soft or slightly expanded This can be normal and due to moisture in the air DO NOT handle or service core until it is dry or air passages can become damaged and or closed 4 WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Before installing or servicing system always turn off main power to system There may be more than 1 disconnect switch A CAUTION CUT HAZARD Failure to follow this caution may result in personal injury Sheet metal parts may have sharp edges or burrs Use care and wear appropriate protective clothing and gloves when handling parts TROUBLESHOOTING NOTE Reference Table 3 Troubleshooting Chart This can be a quick guide in resolving unit problems It is also recommended to review and understand Wall Control Board Operation and Care and Maintenance sections before continuing There are 3 main parts to focus on when troubleshooting ERV HRV unit 1 Wall Control 2 Electronic control board 3 Blower motor 1 Wall Control Typically the wall control is either good or it is bad Use Table 1 to determine if wall control is operating correctly Use Fig 9 to check control wire connections NOTE The electronic control board and wall control operate on 12vdc 2 Control Board Electronic control board must have wall control attached before unit will function properly except for units equipped with
8. the ventilator selects the speed based on indoor humidity and outdoor temperature It may cycle on off every 30 minutes depending on humidity and outside temperature LOW low speed all of the time HIGH high speed all of the time Ifthe fan speed is set to Auto and the ventilator wants to run the fan speed will run at High continuous speed Otherwise the fan willstay at the chosen continuous fan speed ERV HRV ERV HRV WALL CONTROL Q Q MODE A KA AIR EXCHANGE CHANGE D AIR MAINTENANCE HUM RELATIVE HUM EXT TEMP EXT 55 10C 50F 45 m 0C 32F 35 10C 14F 30 m 20C 4F D HUMIDITE RELATIVE HUMIDITY Terminal Connector CONTROL CONNECTOR 6 BLACK Ww 66 GREEN 66 RED qe XELLOW A05334 Fig 9 Control Connector Table 1 Basic Control or Crosedto outside or OW Air exchange with outside O pen to outside Ow Intermittent Om Air exchange with outside Open to outside Low High Air exchange with outside High Table 2 Recommended Humidity Levels OU D MPERATUR DOUB PANE WINDOW AIPLE PANE WINDOW 50 65 percent 3 90 spec 55 percent a KAA Sspecm T5 percent zF 25 percent 27 S5 percent ELECTRICAL CONNECTIONS 1 115 vac Wiring The ERV HRV operates on 115vac It comes with a power cord attached to unit and ready to plug into a fused outlet
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10. Drain With Loop Trap HRV Only ERV HRV ERV HRV B FURNACE N A B Not less than 10 feet ZZ I INSULATED DUCT CONNECTING FRESH AIR amp EXHAUST TO OUTSIDE NOTE Supply amp exhaust ducts have internal balancing dampers that must be adjusted lt a S fF y FE S lu ys N GSS Z Lm REAR c GROUND LEVEL ba A00111 A05358 Fig 7 Exhaust Ventilation WALL CONTROL Step 1 Location The ERV HRV wall control is unique to this unit The ERV HRV will not operate without it This control senses humidity not temperature It must be located in an area where it will continually monitor fresh air circulating within the home Install ERV HRV wall control as close as possible to main system thermostat and follow same guidelines as installing a thermostat locate approximately 5 ft above floor mount on an inside partitioning wall etc Step 2 Wiring Remove top cover assembly from wall control and pass thermostat wire through hole located on back of control before attaching to wall Connect Y R G and B yellow red green and black between wall control and ERV HRV connector following color code See Fig 8 and 9 Replace top cover assembly In Fig 9 item A shows a correctly inserted wire item B shows an incorrectly inserted wire NOTE ERV HRV wall control and circuit board operate on 12vdc A98383 Fig 8 Typical Wall Control Step 3 Operation
11. ERVCCSVA1100 ERVCCSHA1100 HRVCCSVA1100 HRVCCSHA1100 ENERGY HEAT RECOVERY VENTILATOR Turn to the Experts Installation Start up and Operating Instructions A05229 Fig 1 ERV HRV Unit Top Port CN c 1 0 nnn nnn A05330 Fig 2 ERV HRV Unit Side Port NOTE Read the entire instruction manual before starting the installation SAFETY CONSIDERATIONS Installation and servicing of this equipment can be hazardous due to mechanical and electrical components Only trained and qualified personnel should install repair or service this equipment Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters All other operations must be performed by trained service personnel When working on this equipment observe precautions in the literature on tags and on labels attached to or shipped with the unit and other safety precautions that may apply Follow all safety codes Installation must be in compliance with local and national building codes Wear safety glasses protective clothing and work gloves Have fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit Recognize safety information This is the safety alert symbol A When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Under
12. K OF PUSH BUTTON SWITCH A98386 Fig 12 Push Button Timer Wiring Layout Fresh air flow SEE DETAIL A Exhaust Air Flow A05333 Fig 13 Balancing ERV HRV CONTROL BOARD OPERATION 1 Defrost The ERV HRV continually monitors the outside air temperature If the outside air is at or below 23 F 5 C the ERV HRV will initiate a defrost cycle by closing the outside air damper and recirculating warm indoor air through the heat recovery core This happens every 32 min with 6 minute defrost cycle During this process core is defrosted without the use of electric strip heat At 5 F 15 C unit will defrost for 6 minutes every 32 min At 17 F 27 C the unit will sense a need to defrost every 20 minutes with a 6 minute cycle See the Troubleshooting section for a control logic explanation 2 Off and Intermittent Off Mode When ERV HRV is Off K1 relay is open and KS relay is energized which closes outside air damper 3 High Speed Air Exchange When high speed air exchange occurs K1 and K2 relays are energized and K5 relay is de energized This opens low speed contacts and closes high speed contact on K2 relay This also opens contact on K5 relay which opens outside air damper Then 115vac is applied between orange and gray wires on Molex plug pins 1 and 6 and blower motor runs in high speed operation 4 Low Speed Air Exchange When low speed air exchange occurs K1 Relay is energized which closes the contacts
13. Unit must be grounded for proper operation All electrical connections must comply with National and Local Electrical Codes or other ordinances that might apply A WARNING ELECTRICAL SHOCK FIRE HAZARD Failure to follow this warning could result in personal injury death and or property damage Do not use an extension cord as a power source for operating the ERV HRV 2 12 vde Wiring The ERV HRV circuit board wall control and accessories operate on 12vdc See Wall Control section item Wiring and Fig 8 and 9 for more information ACCESSORIES 1 20 Minute Timer A push button timer can be used to override the wall control and put the ERV HRV into high speed for 20 minutes Connect switches in parallel and connect leads to ERV HRV terminals I OC and OL See Fig 12 Push button locations are ideal in special activity areas such as bathroom or kitchen where high speed exhaust operation is needed for a short period of time NOTE The 20 minute timer will not function properly unless ERV HRV wall control is applied and working correctly Timing function is internal to electronic circuit board it is activated by a momentary contact between OC and OL The I connection is to illuminate the push button The maximum number of push button timers that can be applied is 5 2 60 Minute Adjustable Timer A 60 minute adjustable timer can also be used to override wall control and put HRV into high speed operation for a selec
14. can be used to evaluate the approximate ventilation needs ofa house Accuracy of calculations are dependent upon the information available and knowing critical measurements of the structure See Fig 15 METHOD 1 To calculate approximate ventilation The sum of rooms X 10 CFM per room plus 20 CFM for a master bedroom or basement Example 8 rooms X 10 CFM 20 CFM 100 CFM NOTE The master bedroom and basement are not included in first part of this equation but figured in at second part of equation METHOD 2 To calculate approximate ventilation Total cu ft X per hr total Take total and divide by 60 to get CFM Example 1220 sq ft X 8 ft in height 9760 cu ft per floor 9760 cu ft x 2 floors 19520 total cu ft in house 19520 cu ft X 3 air changes per hr 5856 cu ft 5856 cu ft 60 minimum per hr 98 CFM Conclusion The total amount of air flow needed is 98 CFM This falls within airflow range of a ERVCCSHA1100 size unit ERV HRV ERV HRV DETAIL A Port with integrated balancing damper Top View J ELECTRONIC CONTROL THE WIRES FROM THE SWITCH BOARD YELLOW INDICATOR J3 3 BLACK COMMON J3 4 RED SWITCH J3 5 OPTI e 60 MINUTE TIMER OPTIONAL PUSH BUTTON SWITCHES 5 SWITCHES MAXIMUM 00 BLACK J3 4 COMMON A TERMINAL STRIP Al YELLOW J3 3 INDICATOR TERMINAL STRIP e RED J3 5 SWITCH TERMINAL STRIP OL BAC
15. ith shipping company if shipment is damaged or incomplete Check to make sure ERV HRV unit matches Fig 1 or Fig 2 Step 2 Select Location The ERV HRV should be located in a conditioned space and in close proximity to a fused power source It should be easily accessible for routine maintenance If ERV HRV is installed independent of a forced air system unit should be located near the center of the air distribution system If ERV HRV is installed in conjunction with a forced air system unit should be located next to or close to the indoor equipment ERV HRV ERV ports on side bottom view A05263 Fig 3 Conventional Horizontal Unit COMPONENT DESCRIPTION The following listed items are components of HRVCCLHA See Fig 3 1 Stale air return from building connected to return air duct system Fresh air intake connected to outdoor air inlet hood Exhaust air connected to outdoor air exhaust hood Mechanical filters trap dust contained in the air nn FF U N Heat recovery core is a cross flow type The core transfers heat between the 2 air streams 6 Blowers bring in fresh air from outside and exhaust stale air to outside 7 Electronic control circuit ensures proper unit operation 8 Fresh air supply from HRV connected to return air duct of forced air system 9 See Fig 9 for terminal connector block for wiring wall and timer contorls UNIT INSTALLATION A CAUTION UNIT DAMAGE
16. low this caution may result in unit component damage DO NOT clean filters in a dishwasher and DO NOT dry them with a heating appliance or permanent damage will result 3 Blower Motor and Wheel ERV HRV blower motors are factory lubricated for life Lubricating bearings is not recommended However inspect and clean any accumulated dirt and grease from blower motor and wheel annually 4 Cleaning the Core ERV is equipped with a special energy recovery core which utilizes a special membrane and allows transfer of sensible and latent energy The core should always be vacuumed only every 3 months to remove dust and dirt that could prevent transfer of energy See Fig 16 and 17 NOTE The core should only be serviced when outdoor temperature is between 60 F and 75 F and it is dry FRESHAIR TO BUILDING STALE AIR FROM BUILDING A05346 Fig 14 ERV HRV Airflow During Air Exchange ERV HRV ERV HRV WASH WASH ROOM ROOM BEDROOM MASTER 1 2 3 BEDROOM BEDROOM 4 1220 sq ft 113 sq m WASHROOM 6 KITCHEN 7 LIVING ROOM 5 DINING ROOM 8 1220 sq ft 113 sq m A05359 Fig 15 Floor Plan Example A CAUTION UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation DO NOT use water to clean core or damage will result In addition before servicing or removing the core inspect
17. m mmama Suum Kote abeyoa moj z sse Burm uopey 26401 Bur 13 ERV HRV Copyright 2005 Carrier Corp e 7310 W Morris St e Indianapolis IN 46231 Printed in U S A edition date 11 05 Catalog No ERVHRV 1SI ppp LADO go a aa Yi Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces New 14
18. manual switch such as the new horizontal units Outside air thermistor must be connected to control board for it to operate properly See Table 6 Temperature vs Ohm Chart for valid temperature range 3 Blower Motor The ERV HRV blower motor operates on 115vac with 2 speed operation The easiest way to check blower speed operation is to use the wall control and initiate a low speed blower and high speed blower operation NOTE If there is a short circuit or an open circuit at thermistor CPU will go into a 5 minute defrost cycle every 20 minutes This feature is not there on older board versions with 3pin jumpers Table 3 Troubleshooting Chart z ontinuous exchange mode Use Intermittent Mode Air too humid A used in small houses Check humidity level settings Defrost condition is in effect Unit will operate when not in defrost mode Outdoor temperature is below 23 F Unit not responding to wall control Broken control wire est wall contro Check connections Check thermistor Unit stops momentarily ectrical supply interrupted eck units circuit breaker Air from distribution register too cold mproper calibration of air flow eck calibration of flow rates Unit makes annoying noise Ventilation wheel out of adjustment Hemove the motor and screw wheel on properly Noise level too high at distribution Air duct system too short nstall a duct silencer registers when in high speed 10 Defrost cycle is based on outdoor ambien
19. p 1 Balancing Dampers Balancing dampers sometimes called butterfly dampers are located in fresh air intake and stale air exhaust of the ERV HRV See Fig 13 Some field modification may be required to ensure proper installation of balancing dampers while located in flexible duct Insulating over these dampers is strongly recommended after balancing is complete to prevent condensation problems STANDARD FURNACE INTERLOCK WIRING THERMOSTAT QJ rns FOUR l WIRES TWO WIRES heating only c HOLO3NNOO JVNIAH3L LINN Za 9 S mE S 7 lt mE e EE FURNACE 24 VOLT TERMINAL BLOCK TWO WIRES LINN 9NISN3QNOO gt S a eo A A Fig 10 Interlock Relay Wiring Layout A98400 Fig 11 Magnehelic Gage VENTILATION EVALUATION A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in reduced unit efficiency capacity or unit life DO NOT use HRV during construction of a house or when sanding drywall This type of dust may damage system When ventilation requirement is determined use Product Data Sheets to reference unit airflow delivery and performance The ventilation capacity of an ERV HRV unit while at maximum speed is defined according to greatest total airflow required These methods are derived from the Canadian National Building Code 1995 version and the CSA F326 1 revision The following 2 methods
20. stand these signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation INTRODUCTION The Energy Heat Recovery Ventilator ERV HRV is used to exchange indoor stale air with outside fresh air The unit isequipped with a special energy heat recovery core which transfers both sensible and or latent heat between the fresh incoming air and stale exhaust air The cross flow design core allows entering and leaving air streams to transfer heat and or latent energy without mixing See Fig 14 The model operates at 2 airflows 50 CFM in low speed and 100 CFM in high speed This unit comes in two configurations vertical or horizontal Special attention should be given to duct application balancing the ERV HRV and locating unit for easy access and routine maintenance INSTALLATION CONSIDERATIONS Step 1 Inspect Equipment Move carton to final installation location Remove ERV HRV from carton taking care not to damage unit Remove all packaging and inspect unit for damage Remove parts bag from inside unit File claim w
21. t See Table 10 Table 4 Defrost Cycle Outside Temperature Celcius C Fahrenheit F 5 to 27 23 to 17 27 and less Outside Temperature Celcius C Fahrenheit F 5 to 27 27 and less HRV Defrost Cycles Operation time min Defrosting min between each defrost cycle 25 22 RV Defrost Cycles Operation time min Defrosting min between each defrost cycle ta 9 23 22 Table 5 System Wiring Colors and Connections ONTROL MODU Terminal Block No WALL CONTROL WIRE W A ONTRO rminal B i age 2 Sna S Color Terminal No Terminal Identification Identification 7 5 8 Be 7 3 731 9 T 8 e a 3 Override Test To use override test function a thermistor must be connected to the control board Unit must not be in defrost mode during an override test HIGH SPEED 1 Disconnect ERV HRV from 115vac 1 Unplug wall control wires at control module terminal block inside ERV HRV 2 Plug ERV HRV back to 115vac 3 Attach a wire across J3 8 and J3 9 B and G on control module terminal block 4 Push in door switch this will initiate a high speed exchange LOW SPEED 1 Unplug ERV HRV from 115vac 2 Disconnect wall control wires at control module terminal block inside ERV HRV 3 Plug ERV HRV back to 115vac 4 Connect a 3 0 K ohm resistor between B and G on control module terminal block 5 Push in door switch this will initiate a low speed exchange
22. t amount of time Connect timer in parallel with push button timers or to ERV HRV terminals OC and OL See Fig 12 The 60 minute timer will provide a minimum of 10 minutes and a maximum of 60 minutes of ventilation at high speed BALANCING ERV HRV Balancing intake and exhaust airflow is very important for proper System operation and optimum performance when applying an ERV HRV Unit balancing prevents a positive and or negative pressure within the home Balancing the ERV HRV is done by applying magnehelic gage and balancing dampers to the fresh air intake and stale air exhaust ducts See Fig 11 Airflow is temporarily determined by connecting a magnehelic gage to the pressure taps on ERV HRV See Fig 13 Balancing chart is located on unit door If supply air from outside is greater than exhaust air from the house an imbalance can result over pressurizing the home If exhaust air is greater than supply air combustion appliances may backdraft bringing exhaust fumes into the house A balanced condition will ensure optimum performance provide satisfied customers and avoid expensive callbacks Before proceeding with balancing all windows doors and fireplace flues should be tightly closed No exhaust systems such as range top exhausts dryer exhaust fume hoods bath or roof fans should be in operation The forced air furnace if used for circulation should be operating in continuous fan mode for normal operating speed Ste
23. ted to draw from kitchen bathroom basement or other rooms where stale air can exist Proper size and type of registers must be used to minimize pressure drop The velocity of airflow through register should not be above 400 ft minute Maximum length of duct for the system should be designed according to the highest speed of the unit Refer to specifications listed in unit Product Data Digest for ventilation capacities Step 3 Forced Air Application Most ERV HRV applications will be installed in conjunction with new or existing forced air system To operate properly the fresh air supply and stale air return from ERV HRV connect directly to return air duct system This is how the ERV HRV distributes fresh air and removes stale air from inside of building See Fig 7 For these installations furnace or fan coil blower must be interlocked and operate continuously whenever ERV HRV is energized NOTE The fresh air from ERV HRV is introduced into return air duct at a point no less than 10 ft upstream of furnace or fan coil This connection should be direct See Fig 7 This is to allow incoming fresh air to mix before entering indoor equipment Step 4 Connect Ducts to ERV HRV A CAUTION PROPERTY DAMAGE HAZARD Failure to follow this caution may result in minor property damage from sweating duct or loss of unit efficiency and capacity If ERV HRV duct work is installed in an unconditioned space insulated flexible duct is
24. ter or oil fill pipe Fresh air intake must be positioned as far as possible from garbage containers and potential chemical fumes When possible it is advised to locate the intake and exhaust hoods on same side of house or building The intake and exhaust hoods should never be located on interior corners or in dead air pockets See Fig 7 Both intake and exhaust hoods must be 18 in from ground and at least 12 in above anticipated snow level After selecting proper hood locations make appropriate size hole through exterior wall pass flexible duct through hole and insert hood tube into duct Tape duct vapor barrier tightly around hood tube and insert assembly back into wall and fasten securely Step 6 Condensate Drain For ERV skip Step 6 and continue to Step 7 To connect condensate drain proceed as follows 1 Punch out holes in foam insulation and door then insert sleeved grommets into bottom of unit using the gasket washer and nut See Fig 6 2 Cut two sections of plastic tubing about 12 long and attach them to each drain 3 Join the two short sections of plastic tubing to the T connector and the main tube as shown 4 Make a loop in the tubing below the T connector to create a trap to prevent sewer gases from entering the ventilation system See Fig 6 5 Connect unit drain to building s main drain Provide slight slope from unit for run off A99268 Fig 6 Condensate
25. ve presses of the button The LED indicates which mode is currently selected Off Intermittent Low or High Step 6 Latent Control NOTE To ensure highest degree of humidity control in cooling season the INTERMITTENT mode should be used See Table 1 and reference LOW and INTERMITTENT control operation listed above NOTE The ERV HRV may becontrolled using the Infinity system control The ERV HRV may be connected using either a NIM ora 4 Zone Damper Module See the appropriate instructions if using the NIM of a 4 Zone Damper Module for connection instructions The Infinity system control will simultaneously control the ERV HRV and the indoor blower Push Button Timers may be used and are connected to the ERV HRV However the Infinity system should be set to continuous fan to ensure that the fresh air is circulated in the home In a Zoned System at least one zone should be set to continuous fan OPERATING THE ERV HRV WITH THE INFINITY CONTROL The ventilator has four settings in heating mode and three settings in cooling mode Heating AUTO the ventilator selects the speed based on indoor humidity and outdoor temperature It may cycle on off every 30 minutes depending on humidity and outside temperature LOW low speed all of the time HIGH high speed all of the time DEHUM will only turn on if humidity is 3 over set point The speed is determined by indoor humidity and outdoor temperature Cooling AUTO
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