Tradewins Furniture RNC15 User's Manual
Contents
1. Sensible Efficiency 13 F 25 C 59 Latent Efficiency 95 F 35 C 0 Total Efficiency 95 F 35 C 20 VAC 60HZ 120 WATTS High 3 W C 182 WATTS Low 3 W C 70 Sensible Efficiency thermal Latent Efficiency moisture Note Effectiveness based on temp differential between the 2 airstreams Efficiency includes parasitic losses from fan and defrosting 99 132 20 Minute Fan Timer 3 wire 20 gauge wire min 100 length max 99 186 Weather Hoods 2 6 150mm c w 1 4 6mm screen 99 116 Dehumidistat Ventilation Control Dehumidistat with ON OFF 99 130 Dehumidistat Control Dehumidistat All units conform to CSA and UL standards Dimensions RNC25 inches mm BLOWERS FRESH AIR STALE AIR FROM OUTSIDE FROM INSIDE NOTE Front clearance of 25 inches 635 mm is recommended 6 for servicing unit OS DAMPER N DEFROST PORT Y STALE AIR FRESH AIR i 23 5 i TO OUTSIDE TO INSIDE me gt CONDENSATE DRAINS 597 572 All Duct Connections 6 150mm FRONT VIEW TOP VIEW SIDE VIEW Warranty Two year parts Fifteen year aluminum core 3 0204 Clearances and Requirements WARNING Before installation careful consideration must be given to how this 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 A2. reassemble making sure ducting is reattached firmly and insulation and moisture barrier are sealed and taped Before attempting this task thought should be given to having a qualified service technician complete the service work
3. requires 3 wires Designed for a central location Ventilation control turns HRV system ON and OFF Dehumidistat increases ventilation when required High speed override switch Great for building code requirements Low voltage Connect one per HRV only Connects to red black and orange Part No 99 116 REMOTE DEHUMIDISTAT requires 2 wires anywhere humidity is a concern provides high speed ventilation when humidity level exceeds selected setting Connects to red and black Part No 99 130 White 20 MINUTE TIMER requires 3 wires provides high speed for 20 minutes maximum wire length 100 connect up to 4 connects to red black and green terminals Part No 99 132 Self Test The ventilator will automatically initiate a self test sequence when power is applied Fan motor is cycled and then damper motor is cycled Duration Approximately 1 5 mins How much ventilation do need During seasons when your windows and doors are closed winter and summer if air conditioned the HRV should operate continuously when the dwelling is occupied and either continuously or intermittently when not occupied Mode DIP Switch Settings For most installations the HRV will normally be set to oper ate continuously on low speed To suit various lifestyles the HRV offers a selection of operating modes Method of Operation Good intermittent operation at all times Better continuous operation during
4. 12V LOW VOLTAGE Furnace FIELD INSTALLED LOW VOLTAGE Dehumidistat Operation HRV only The optional HRV remote controls include a dehumidistat which controls humidity levels during the heating season The control has a selector knob with set points ranging from 2096 to 80 relative humidity RH Most people are comfortable when indoor relative humidity levels are in a range from 30 to 45 Defrost Operation The dehumidistat switches the ventilator to high speed when the moisture level in the building exceeds the desired setpoint The dehumidistat switches the HRV back to low speed ventilation when the humidity has been reduced below the setpoint The dehumdistat should only be used during the heating season It must be set to OFF position throughout the rest of the year A CAUTION Damper Defrost The damper defrost HRV has an electronically controlled damper defrost mechanism The defrost timer is activated when the outside temperature drops below 27 F 3 A motor driven damper door mechanism closes off the sup ply air from ouside allowing the exhaust air to recirculate through the unit After the defrost period the damper oper ates in the opposite direction to reopen the fresh air port Defrost cycle repeats until the temperature again rises above 27 F 3 C Lengthening the run time may result in ice buildup on the core Defrost Cycle DIP Switch Settings Defrost DIP Switch Settings located
5. 2 No separation requirements necessary between direct connection point and furnace 3 Weatherhood arrangement is for drawing purposes only 6 2 m minimum separation required 18 460 mm above grade minimum 4 Due to the differences in pressure between the HRV and the epuipment it is being Unit is normally balanced on HIGH speed connected to the HRV s airflow must be confirmed on site using the balancing with furnace blower ON procedure found in this manual DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN Return Air MS ee ER Pe EXHAUST AIR from various parts of home i e bathrooms kitchens Balancing damper Outdoors 4 57 3 min recommended i Balancing damper Cool Air Return Unit is normally balanced on HIGH speed d Forced Air with furnace blower ON Furnace NOTES 1 Furnace blower is required to operate when ventilation from HRV is require The furnace should be set to run continuously 2 A minimum separation of 40 inches 1 m is required between the two direct connections 3 The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air 4 Weatherhood arrangement is for drawing purposes only 6 2 m minimum separation required 18 460 mm above grade minimum 5 Due to the differences in pressure between the HRV and the epuipment it is bein
6. day or occupied conditions intermittent at night or unoccupied Best recommended continuous operation of both HRV and furnace air handler blower Figure 1 Factory DIP Switch Settings The factory setting of the DIP switches located on the cir cuit board provides continuous low speed ventilation Optional Remote Controls will initiate high speed ventila tion Remote controls with an ON OFF switch refer to Remote Control Devices in this manual will shut the entire sys tem down when the remote control is in the OFF position Changing the remote control from OFF to STANDBY can be achieved by Setting the DIP Switch as per Figure 2 Figure 1 ON Hs 1 REMOTE du DFR2 mm Increasing Low Speed to Medium Low Figure 2 DIP Switch Settings for Standby When using a Remote Control Device that has an ON OFF Switch This DIP Switch Setting can be adjusted when using a system control that has an ON OFF switch refer to Remote Control Devices in this manual STANDBY is achieved when the Remote Control Switch is in the OFF position The Dehumidistat and Timers will initiate high speed ventilation regardless of the ON OFF switch posi tion when this DIP switch configuration is used Figure 2 ON Hs REMOTE DFR2 mm 3 DFR3 A ATTENTION Figure 2 may not meet building code conformance in certain geographical areas Check wit
7. space where the temperature is maintained above the freezing point or freeze protection must be provided The HRV cabinet has prepunched holes for the drain see below Insert the drain spout through the hole in the drain pan Do not forget the O ring which seals each spout to the pan REMEMBER TO HAND TIGHTEN ONLY the washer and lock nut which hold the drain spout in place Construct a P Trap using the plastic tee connector Cut two lengths of hose and connect each piece to an end of the T fitting then connect the other ends to the two drain spouts Position the T fitting to point upward andconnect the drain line Tape or fasten base to avoid any kinks This creates a trap which will hold some condensate and pre vent odors from being drawn up the hose and into the fresh air supply of the HRV P Trap HRV only DRAIN HOSE PLUMBING DRAIN SPOUT SPOUT ZIP TIE 1 2 1D TEE CONNECTOR DRAIN HOSE 7 DRAIN HARD PIPE PLUMBING Note Secondary drain pan may be required to protect from condensate leakage Installation Diagrams HRV DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN EXHAUST AIR from various parts of home i e bathrooms kitchens Return Air recommended T Outdoors Qu Forced Air Furnace NOTES 1 Furnace blower is required to operate when HRV is ON to provide good air distribution
8. to be effective A CAUTION Do not mount exhaust grille within 4 1 2m horizontally from stove to prevent grease from entering HRV Balancing Dampers and Grilles Balancing dampers and or adjustable grilles should be used to balance the flow rates into and out of various rooms Grilles or diffusers should be positioned high on the wall or in the ceiling Kitchen exhaust grilles must never be con nected to a range hood They should be installed at least 4 feet 1 2m horizontally away from the stove A hinged 6 X10 150 X 250mm rectangular kitchen exhaust grille is available as part number This grille includes a remov able grease filter Canadian building codes require that kitchen grilles be equipped with washable filters Field supplied balancing dampers should be installed external to the unit to balance the amount of stale air being exhausted with the amount of fresh air being brought into the house Refer to Air flow Balancing sec tion Kitchen Grille REMOVABL FILTER The Round Diffuser is available in 4 100mm amp 5 125mm AIR FLOW 6 150mm J Sum 8 200mm A WZ Round ln AIR FLOW Diffusers Drain Connection HRV Only During a defrost cycle the HRV may produce some con densation This water should flow into a nearby drain or be taken away by a condensate pump A CAUTION The HRV and all condensate lines must be installed in a
9. CK INTERNAL DEHUMIDISTAT pice IF APPLICABLE BI DIRECTIONAL RED DAMPER MOTOR SPARE WALL MOUNTED DEHUMIDISTAT 20 MINUTE FAN TIMER DVC Remove factory installed jumper on circuit board Black to Black Dehumidistat Red to Red 12V Red to Red 12V Black to Black Dehumidistat Black to Black Dehumidistat Red to Red 12V Green to Green LED Drive Orange to Orange OBCS 98 RNC3 001 INSHRV 0104 12 Interlocking HRV Operation to an Airhandler Furnace Blower When using the Interface relay contacts to initiate blower operation on a fur nace certain thermostats will initiate the outdoor cooling condenser when R and G are closed Use this wiring configuration to prevent the Interface relay contacts from initializing the condenser unit This problem can occur at the thermostat because the Y termi nal 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 E rm T 1r 1r 1AUTO TR ej rs fe pm I po p L Ei T2 NEUTRAL SPARE LINE FAN Lr LL Jet Jos m INI ASNA v e VDR1 BLACK Og LN ow are E BLUE r3 LQ coms RED P3 THERMISTOR P2 DEHUMIDISTAT HIGH VOLTAGE
10. Free 5 Drain condensate Line Clean Once a Year Inspect drain line drain spout and P trap for blockage mold or kinks Flush with warm soapy water and replace if worn bent or unable to clean 6 Clean Duct System if Required The duct system running to and from the HRV may accu mulate dirt Wipe and vacuum the duct once every year You may wish to contact a Heating Ventilation company to do this 7 General Maintenance Twice a Year Wipe down the inside of the cabinet with a damp cloth to remove dirt bugs and debris that may be present 8 Cleaning the Fans Fans may accumulate dirt causing an imbalance and or excessive vibration of the HRV A reduction in the air flow may also occur In new construction this may result within the first year due to heavy dust and may occur periodically after that over time depending on the outdoor conditions unplug the HRV and open the service door remove the core remove ducting metal and or flexible insulated type from the red and or blue ports which are connected immediately inline with the fan assembly usea small brush such as a toothbrush or pipe cleaner and insert first a through the large opening of the fan assembly and then b through the smaller opening in the end of the fan assembly scrub individual fan blades until clean Avoid moving or damaging balancing flat weight clip is usually found on one or more of the fan blades vacuum and wipe
11. MODELS RNC15 RNC25 NDS HEAT RECOVERY VENTILATOR INSTALLATION INSTRUCTION FOR HEAT RECOVERY VENTILATOR HRV Shipping and Packing List Package 1 of 1 contains 1 Assembled ventilator 1 Bag assembly containing 2 Drain spout assemblies HRV units only 4 Hanging straps 1 Installation manual Required Tools Installation Tools tin snips e assorted screw drivers electric drill large zip ties fabric flexible duct class II rated hammer e mastic tape wire strippers e alum foil duct tape knife e zip ties e caulking gun e 1 2 D drain hose e smoke pencil Balancing Tools Pitot Tube Balancing Kit Case 8 ft vinyl tubing Pitot tube magnehelic gauge 0 0 25 and mounting plate e Pitot Tube with instructions and Digital Manometer with resolution of 0 0 25 must read to 1 100ths of an inch Optional Accessories e 20 Minute Fan Timer Wall Mounted Dehumidistat e Weather hood Kit e Round Diffuser 4 100mm 5 125mm 6 150mm 8 200mm Kitchen Grille may be required by code for kitchen applications contains removable grease filter o eG lt gt US 000 7 ENERGY STAR Conforms to UL Standards Application Heat Recovery Ventilators HRV are designed to provide fresh air while exhausting an equal amount of stale air The HRV is equipped with an aluminum core The device uses the stale air that is being exhau
12. RS Each air stream has one centrifugal blower driven by a common PSC motor FILTERS Washable air filters in exhaust and supply air streams MOUNTING THE HRV Four threaded inserts at corners of case designed to accept four PVC reinforced polyester straps that are supplied with the unit DEFROST Damper defrost system defrosts automatically as the outdoor temperature falls CASE Twenty gauge prepainted galvanized steel G60 for superior corrosion resistance Insulated to prevent exterior condensation Drain connections two 1 2 12mm OD WEIGHT 87 Ibs 39 5 kg SHIPPING WEIGHT 89 Ibs 40 5 kg CONTROLS HRV System Control HRV defaults to LOW SPEED when plugged in HIGH SPEED option is accessible by connecting remote controls to designated terminals inside electrical box of HRV Standard LOW SPEED SETTING can be increased by manipulating switches in electrical box OFF Standby LOW or OFF HIGH speed operation also available by manipulating switches OPTIONAL ACCESSORIES 99 132 20 Minute Fan Timer 3 wire 20 gauge wire min 100 length max 99 186 Weather Hoods 2 6 150mm c w 1 4 6mm screen 99 116 Dehumidistat Ventilation Control Dehumidistat with ON OFF 99 130 Dehumidistat Control Dehumidistat All units conform to CSA and UL standards Dimensions RNC15 inches mm Performance Net supply air flow in cfm L s against external static pressure E S P RNC15 external static pressure
13. actor balance HRV air flow HRV and or Ducts Frosting up HRV air flow is improperly balanced malfunction of the HRV defrost system Note minimal frost build up is expected on cores before unit initiates defrost cycle functions have HVAC contractor balance the HRV ensure working properly Condensation or Ice Build Up in Insulated Duct to the Outside incomplete vapor barrier around insulated duct a hole or tear in outer duct covering tape and seal all joints tape any holes or tears made in the outer duct covering ensure that the vapor barrier is completely sealed Water in the bottom of the HRV drain pans plugged improper connection of HRV drain lines HRV is not level drain lines are obstructed HRV heat exchange core is not properly installed 17 ensure O Ring on drain nozzle sits properly look for kinks in line check water drain connections make sure water drains properly from pan Maintenance 1 Inspect Exterior Hoods at least once a month Make sure exhaust and fresh air supply hoods are not blocked or restricted by leaves grass or snow In winter it is especially important to make sure snow is not blocking the hoods or that frost has not built up on the wire mesh bird screen WARNING Blockage of hoods may cause an imbalance 2 Clean Air Filters Twice a Year The standard filters equipped with your HRV are remov able and washable a simply op
14. alancing Damper Damper optional Magnehelic Um gauge Troubleshooting Symptom Cause Solution Poor Air Flow 1 4 6mm mesh on the outside hoods is plugged clean exterior hoods or vents e filters plugged remove and clean filter core obstructed remove and clean core house grilles closed or blocked check and open grilles dampers are closed if installed open and adjust dampers poor power supply at site have electrician check supply voltage at house duct is restricting HRV e check duct installation improper speed control setting increase the speed of the HRV HRV air flow improperly balanced have contractor balance HRV Supply air feels cold poor location of supply grilles the air flow may irritate locate the grilles high on the walls or under the baseboards the occupant outdoor temperature extremely cold install ceiling mounted diffuser or grilles so as not to directly spill the supply air on the occupant eg over a sofa turn down the HRV supply speed A small duct heater 1kw could be used to temper the supply air placement of furniture or closed doors is restricting themove ment of air in the home if supply air is ducted into air handler return the air handler fan may need to run continuously to distribute ventilation air comfortably Dehumidistat is not Operating improper connection to ventilator external low voltage is shortened out by a staple or nail check dehumidistat s
15. cfm L s Q 0 1 25 Pa 177 83 0 2 50 Pa 164 77 Q 0 3 75 Pa 156 73 0 4 100 Pa 143 67 0 5 125 Pa 123 58 Max Sensible Effectiveness 7896 13 25 C outdoor air 72 F 22 C 40 RH indoor air Test Parameters 67cfm 32L s Sensible Effectiveness 32 F 0 C 76 Sensible Efficiency 32 F 0 C 66 Sensible Efficiency 13 F 25 C 60 Latent Efficiency 95 F 35 C 0 Total Efficiency 95 F 35 C 20 VAC 60HZ 120 WATTS High 3 W C 173 WATTS Low 3 W C 63 Sensible Efficiency thermal Latent Efficiency moisture Note Effectiveness based on temp differential between the 2 airstreams Efficiency includes parasitic losses from fan and defrosting BLOWERS FRESH AIR STALE AIR FROM OUTSIDE FROM INSIDE cep NOTE Front clearance of 25 inches 635 mm is recommended ioc for servicing unit 85 DAMPER N DEFROST PORT Y 9 4 a zi STALE AIR FRESH AIR i i 23 5 TO OUTSIDE TO INSIDE mm CONDENSATE DRAINS 597 i 572 i All Duct Connections 6 150mm FRONT VIEW TOP VIEW SIDE VIEW Warranty Two year parts Fifteen year aluminum core Engineering Data HRV RNC25 THERMALLY CONDUCTIVE PATENTED ALUMINUM CORE The cross flow heat recovery core transfers heat between the two air streams It is easily removed for cleaning or service MOTORS AND BLOWERS Each air stream has one cent
16. e air handler if applicable This will pro vide the maximum 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 down stream 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 digital manometer capable of reading from to 0 25 in 0 62 Pa of water preferably to 3 digits of resolution The tube coming out of the end of the Pitot is connected to the high pressure side of the gauge The tube coming out of the branch of the Pitot is connected to the low pressure or refer ence side of the gauge Insert the Pitot tube into the duct pointing the tip into the air flow For general balancing it is sufficient to move the Pitot tube around in the duct and take an average or typical reading Repeat this procedure in the other supply or return duct Determine which duct has the highest air flow highest read ing on the gauge Then damper that air flow back to match the lower reading from the other duct The flow should now be balanced Actual air flow can be determined from the 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 t
17. e balanced air flow in HRV ERV Excessive negative pressure may also cause the back drafting of vented combustion equipment Read the Application Warning in Clearances amp Requirements sec tion of this manual Prior to balancing ensure that 1 All sealing of the duct system has been completed 2 All of the HRV s components are in place and functioning properly Balancing dampers are fully open Unit is on HIGH speed 5 Air flow 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 Return unit to appropriate fan speed for normal operation 3 A A field supplied balancing damper for the stale air side is required for system balancing Balancing Procedure The following is a method of field balancing an HRV using a Pitot tube which is advantageous in situations when flow sta tions are not installed in the duct system Procedure should be performed with the HRV on high speed 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 th
18. en access door and slide core out b remove filter clips C once clips are removed filters can be taken off the core to be rinsed with water or a combination of mild soap and water Do not clean in the dishwasher d to re assemble place clean filter s wet or dry back into their positions against the core and return clips to their original position e slide core back into its original position 3 Clean Core Twice a Year open access door b carefully grip ends of core and pull evenly outward core may be snug but will slide out of the channel C once removed from the cabinet remove filters d wash core in warm soapy water do not use dishwasher e install the clean filters f install clean core Note Core installation label on the outer end of the core To install the clean core a first mount the bottom flange of the core guide into the bottom channel approximately 1 4 6mm b mount the left or right side flange of the core guide approximately 1 4 6mm followed by the other side c mount the top flange of the core guide into the top H channel approximately 1 4 6mm d with all four corners in place and the core straight and even push hard in the center of the core until the core stops on the back of the cabinet NOTE Core will appear to stick out from cabinet approxi mately 1 8 3mm This is designed this way so that the access door will fit tight against the core 4 Motors Maintenance
19. en the HRV and the floor joists is recommended Weatherhood Location and Installation Weatherhood kit includes two fixed cover hoods with a 1 4 6mm mesh screen Exhaust Weatherhood Requirements e Atleast 6 2 m from the ventilation air intake At least 18 457mm above ground or above the depth of expected snow accumulation Weatherhood Installation COLLAR IS SUPPLIED TO CAUTI SCREEN ENSURE VAPOUR BARRIER side view IS 100 SEALED TO Unit must be installed level to ensure proper condensate drainage Due the broad range installation and operational conditions consideration must be given for the possibility of condensation forming on the unit or connecting ducting Objects below the 12 galvanized pipe supplied installation may be exposed to condensate _ Atleast 3 1 m away from the corner of the building EXTERIOR 1 4 6 mm SCREEN WALL e Atleast away from gas meter electric meter or a front view 1 Thermal Collar slides over galvanized walkway where fog or ice could create a hazard sleeve of Weatherhood 2 Fasten Thermal Collar to Belt e Not into a garage workshop or other unheated space 3 Slide the Insulated Flexible Ducting over When installing the weatherhood its outside perimeter the Weatherhood s galvanized sleeve ang E fasten it to the Thermal Collar must be sealed with exterior caulking 4 Hood is hinged to allow for easy acces
20. es or 300mm of non metallic flexible insulated duct should be connected between the HRV and the supply exhaust duct system The main supply and return lines to from the HRV must be 6 inches 150mm minimum Branch lines to the individual rooms may be as small as 4 inches 100mm but 5 inch 125mm lines are preferred All ducts running through attics and unheated spaces must be sealed and insulated to code Fresh Air Ducting In applications that do not include an air handler fresh air should be supplied to all bedrooms and living areas excluding bathrooms kitchen and utility areas Grilles should be located high on a wall or in ceiling locations A WARNING Include short length of fabric flex duct other non metallic connector in the Fresh Air to Building hard ducted line in order to keep the HRV 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 Grilles that diffuse the air comfortably such as the Round Diffuser are recommended If the floor is the only option available then special care should be taken in locating grilles Areas such as under baseboard heaters will help to temper the air Also option al inline duct heaters are available for mounting in the supply duct work to add heat if required Direct Connection to Air Handler Duct System Should you wish to hard duct the fresh air f
21. etting it may be on OFF check that the correct terminals have been used check external wiring for a short set the dehumidistat at the desired setting Humidity Levels are too High in Winter Condensation is appearing on the windows dehumidistat is set too high lifestyle of the occupants moisture coming into the home from an unvented or unheated crawl space moisture is remaining in the washroom bathroom and kitchen areas condensation seems to form in the spring and fall HRV is set at too low a speed set dehumidistat lower avoid hanging clothes to dry storing wood and venting clothes dryer inside Heating wood may have to be moved outside vent crawl space and place a vapor barrier on the floor of the crawl space ducts from the washroom bathroom should be sized to remove moist air as effectively as possible use of a wash room bathroom fan for short periods will remove additional moisture timer or fan can be added to washroom bathroom exhaust on humid days as the seasons change some condensation may appear but the home s air quality will remain high with some HRV use increase speed of the HRV Humidity Levels are too Low dehumidistat control set too low blower speed of HRV is too high lifestyle of occupants HRV air flow may be improperly balanced set dehumidistat higher decrease HRV blower speed humidity may have to be added through the use of humidi fiers have a contr
22. fter installation the compatibility of the two pieces of equipment must be confirmed by measuring the air flows of the ventilator by using the balancing procedure found in this manual It is always important to assess how the operation of any HRV may interact with vented combustion equipment i e Gas Furnaces Oil Furnaces Wood Stoves etc NEVER install a ventilator 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 Installation Connecting Appliances to the HRV The following appliances should not be connected to the HRV e clothes dryer range top stovetop fan central vacuum system A CAUTION Lint dust or grease will collect in the HRV damaging the unit NOTE Connecting any of these to the HRV will invalidate your warranty A WARNING Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Installation and service must be performed by a qualified installer or service agency A WARNING Electric shock hazard Can cause injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect switch es Unit may have multiple power supplies Location Selection The HRV must be located in a heated space where it will be possible to conveniently
23. g connected to the HRV s airflow must be confirmed on site using the balancing procedure found in this manual The HRV unit should be plugged into a standard designat ed 120VAC electrical outlet with a ground The outlet should be serviced by a separate 15 amp 120V circuit An extension cord should not be used with this appliance A qualified service technician should make any required electrical connections Remote Control Connections Low voltage connections between the remote controls the dehumidistat or the fan timer should be made by a quali fied service technician Low voltage wires from the remote controls are connected to the HRV micro processor board WARNING In order to prevent electric shock when cleaning or servicing the HRV it is extremely important to confirm the polarity of the power line that is switched by the safety disconnect switch The hot line black is the proper line to be switched To confirm the proper polarity use a voltmeter or test lamp to ensure there is no power after the switch when the door is open Check between that point and ground on the cabinet Always make sure that the HRV is properly grounded Optional Controls Optional Remote Control Devices Low Voltage pEHUMIDISTAT TAT DEHUMIDIS DEHUMIDISTAT VENTILATION CONTROL D V C remove jumper on circuit board when using this control
24. h your local building authority The ventilator automatically operates on its lowest speed when plugged in or switched on This setting is factory supplied from an autotransformer with two selectable low speeds To switch to a continuous medium low speed an installing contractor must interchange the red and blue wires from the autotransformer inside the electrical box Whether or not this change is made the HRV will only be able to access a single selected low speed High speed is available with the use of optional remote controls connected to the appropriate terminals inside the electrical box Wiring Diagrams RNC3 WIRING DIAGRAM LEGEND HIGH VOLTAGE 12V LOW VOLTAGE AUTO TRANSFORMER INTERFACE RELAY CONTACTS FIELD INSTALLED 12V LOW VOLTAGE FAN MOTOR DETAILS POWER SUPPLY AUTO TRANS v E re v s Ls N C COMMON N O T 31 NEUTRAL SPARE LINE om mojm CAPACITOR m Jemm GA SEE o0 e 1 DEFROST DETAIL Lae eee E DIRECT MOUNTED CAPACITOR quam m FACTORY ra PER vorm o zd Fo azm DEFROST DETAILS Model RNC5 3SnddWvve PCB PLUG IN 12 0 CR1 NON FUNCTIONAL FUTURE USE TERMINALS PLUG IN CONNECTOR BLACK BLUE RED ORANGE BI DIRECTIONAL BLACK P3 DAMPER MOTOR SPARE THERMISTOR PCB PLUG IN PLUG IN CONNECTOR BLA
25. he gauge This velocity will be in either feet per minute or meters per second To determine the actual air flow the velocity is multiplied by the cross sectional area of the duct being mea sured This is an example for determining the air flow 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 air flow is then 640 ft min x 0 2 square feet 128 cfm For your convenience the cross sectional area of some com mon round duct is listed below DUCT DIAM inches CROSS SECTION AREA sq ft 5 0 14 6 0 20 7 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 with magnehelic gauge Pitot tube hose and carry case Pitot tube High Pressure Side Low Pressure Side Placement of Pitot Tube HRV NOTE Graphic is for illustrative purposes only Duct connection ports may vary lt lt lt lt lt lt V4 Place pitot tube a minimum of 18 from blower or elbows gt a A Note Duct connections may vary depending on model Outdoors Field supplied Balancing Magnehelic B
26. nd the appropriate port on the HRV It is very important that the fresh air intake line be given special attention to make sure it is well sealed A good bead of high quality caulking preferably silicone sealant will seal the inner flexible duct to both the HRV port and the weather hood prior to clamping with a large zip tie To minimize air flow restriction the flexible insulated duct that connects the two outside weather hoods to the HRV should be stretched tightly and be as short as possible Twisting or folding the duct will severely restrict air flow See below for the recommended connection of flexible insulated ducts to the the outside weather hoods and the HRV Installing the Ducting Between the HRV amp Living Areas in the House To maximize airflow in the duct system all ducts should be kept short and have as few bends or elbows as possi ble Forty five degree elbows are preferred to 90 elbows Use Y tees instead of 90 elbows whenever possible All duct joints must be fastened with screws rivets or duct sealant and wrapped with mastic or a quality duct tape to prevent leakage Mastic is preferred but if duct tape is used we recommend aluminum foil duct tape Galvanized ducting from the HRV to the living areas in the house is recommended whenever possible although flexi ble duct can be used in moderation if necessary To avoid possible noise transfer through the duct system a short length approximately 12 inch
27. on the circuit board can be adjusted to increase the unit s run ventilation time The three minute defrost time cannot change Factory Setting 3 minute defrost time 17 minute run time Option 1 3 minute defrost time 25 minute run time Option 2 3 minute defrost time 30 minute run time gt ON gt ON gt ON HS HS HS REMOTE Cm REMOTE Com DFR3 OFF ON DFR3 on CT CWT SW1 SW1 SW1 Lengthening the run time may result in ice build up on the core Air Flow Balancing It is necessary to have balanced air flow in an HRV The vol ume of air brought in from the outside must equal the volume of air exhausted by the unit If the air flow is not properly bal anced 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 A CAUTION Ensure balanced air flow in HRV Excessive positive pressure may drive moist indoor air into the external walls of the building where it may condense in cold weather and degrade structural components May also cause key holes to freeze 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 A WARNING Ensur
28. rifugal blower driven by a common PSC motor FILTERS Washable air filters in exhaust and supply air streams MOUNTING THE HRV Four threaded inserts at corners of case designed to accept four PVC reinforced polyester straps that are supplied with the unit DEFROST Damper defrost system defrosts automatically as the outdoor temperature falls CASE Twenty gauge prepainted galvanized steel G60 for superior corrosion resistance Insulated to prevent exterior condensation Drain connections two 1 2 12mm OD WEIGHT 63 Ibs 28 7 kg SHIPPING WEIGHT 67 Ibs 30 4 kg CONTROLS HRV System Control HRV defaults to LOW SPEED when plugged in HIGH SPEED option is accessible by connecting remote controls to designated terminals inside electrical box of HRV Standard LOW SPEED SETTING can be increased by manipulating switches in electrical box OFF Standby LOW or OFF HIGH speed operation also available by manipulating switches OPTIONAL ACCESSORIES Performance Net supply air flow in cfm L s against external static pressure E S P RNC25 external static pressure cfm L s Q 0 1 25 Pa 214 101 0 2 50 Pa 206 97 0 3 75 Pa 193 91 0 4 100 Pa 184 87 0 5 125 Pa 170 80 Max Sensible Effectiveness 69 13 F 25 C outdoor air 72 F 22 C 40 RH indoor air Test Parameters 127cfm 60L s Sensible Effectiveness 32 F 0 C 67 Sensible Efficiency 32 F 0 C 60
29. rom the HRV directly into the cold air return of the air handler remem ber to check the air flow balance of the HRV with the air handler fan both ON and OFF to determine that it does not imbalance the unit more than 10 Indirect Connection to Air Handler Duct System If permitted by local codes an indirect connection may be made between the HRV fresh air duct and the air handler return plenum The fresh air from the unit may be directed at a grille installed in the cold air return duct of the air han dler The fresh air outlet from the HRV should be no closer than 4 inches 100mm and no more than 12 inches 300mm from the grille FRESH AIR FROM HRV bw Eu RETURN AIR DUCT FOR AIR HANDLER Stale Air Exhaust System The stale air exhaust system draws air from the points in the house where the worst air quality problems occur Stale air ducts should be installed in the bathroom kitchen and laundry room Applications such as green houses atriums swimming pools saunas etc have unique ventilation requirements which should be addressed with an isolated ventilation system Also the air handler return duct may be used to exhaust from In this method the exhaust air is not ducted back to the HRV with dedicated lines from bathrooms kitchens etc Instead the exhaust air is drawn out of the cold air return of the air handler The air handler blower must be run ning when the unit is operating for this system
30. s for cleaning of bird screen Local code may require greater distances Intake Weatherhood Requirements Should be located upstream if there are prevailing winds from the exhaust outlet At least 6 2 m from the exhaust weatherhood At least 6 2 m away from dryer vents and air handler exhaust medium or high efficiency furnaces A minimum of at least 6 2 m from driveways oil fill pipes gas meters or garbage containers swimming pools At least 18 457mm above the ground or above the depth of expected snow accumulation At least 3 1 m from the inside outside corner of the building Do not locate in a garage attic or crawl space Local code may require greater distances Weatherhood Clearances OUTSIDE CORNER 36 1m 36 1m INSIDE CORNER recommended min recommended min A CAUTION Weatherhood arrangement requires a minimum of 6 2m separation and a minimum of 18 460mm clearance above the higher of the grade or anticipated snow level x 18 460mm min Air Duct Design and Installation A well designed and installed ducting system will allow the HRV to operate at its maximum efficiency Always try to keep duct runs as short and straight as pos sible See Installation Diagrams for various installation options The inner and outer liners of the flexible insulated duct must be clamped to the sleeve of the weather hoods as close to the outside as possible a
31. service the unit Typically the HRV would be located in the mechanical room or an area close to the outside wall where the weather hoods will be mounted If a basement area is not convenient or does not exist a utility or laundry room may be used Attic installations are not normally recommended due to A the complexity of work to install B freezing conditions in the attic C difficulty of access for service and cleaning The HRV unit must be installed in a horizontal position as shown in the illustration below The unit should be sus pended using the provided hanging straps If necessary the unit may be installed on a platform however the cabi net should be isolated from the platform to prevent vibration transmission The unit must be level Sufficient clearance at the front of the access door is required for servicing the air filters and core A minimum of 25 635mm clearance is recommended so the door can be opened Four PVC reinforced polyester hanging straps are provided for hanging the HRV from the basement floor joists Suspending the Unit The hanging straps should be attached to the unit at the top end corners mounting screws are already located on the HRV case Securely fasten the other end of the straps to the floor joists with wide head nails not supplied mak ing sure the UNIT IS LEVEL The straps are designed to reduce the possibility of noise resonance or harmonics therefore using the full length of the strap betwe
32. sted to condition the fresh air as it is being brought in These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities who have jurisdiction before installation Table of Contents Shipping and Packaging 1 Required M oro HA 1 Deci 1 erc reee tr ree 1 Engineering Data sse 2 3 Clearances amp 4 4 7 Installation Diagrams osiinsa 8 Electrical e 9 Optional Controls e at eet 10 Op ration t ea fe e renada ERARE eas 11 Wiring Diagrams ee 12 Interlocking HRV to Furnace 13 Air Flow Balancing eicit 15 16 Troubleshooting s cde teenies tied t tee cin 17 Maintenatiee s oce ree ae d 18 LEAVE FOR HOMEOWNER NOTE Due to ongoing research and product development specifications ratings and dimensions are subject to change without notice TW 25 1206 Engineering Data HRV RNC15 THERMALLY CONDUCTIVE PATENTED ALUMINUM CORE The cross flow heat recovery core transfers heat between the two air streams It is easily removed for cleaning or service MOTORS AND BLOWE
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