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MODELS RNC15/RNC25
TM
HEA HEAT RECO T RECOVER VERY Y VENTILA VENTILAT TO OR R
INSTALLATION INSTRUCTION FOR HEAT RECOVERY VENTILATOR (HRV)
Shipping and Packing List Application
Package 1 of 1 contains: Heat Recovery Ventilators (HRV) are designed to provide
fresh air while exhausting an equal amount of stale air.
1 - Assembled ventilator
1 - Bag assembly containing:
The HRV is equipped with an aluminum core. The device
2 - Drain spout assemblies (HRV units only) uses the stale air that is being e
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Engineering Data - HRV RNC15 THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE Performance The cross-flow heat recovery core transfers heat between the two air streams. Net supply air flow in cfm (L/s) against external static pressure It is easily removed for cleaning or service. E.S.P RNC15 MOTORS AND BLOWERS (external static pressure) [cfm (L/s)] Each air stream has one centrifugal blower driven by a common PSC motor. FILTERS @ 0.1" (25 Pa) 177 (83) Washable air filters in exhaust and supply air st
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Engineering Data - HRV RNC25 THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE Performance The cross-flow heat recovery core transfers heat between the two air streams. Net supply air flow in cfm (L/s) against external static pressure It is easily removed for cleaning or service. MOTORS AND BLOWERS E.S.P RNC25 (external static pressure) [cfm (L/s)] Each air stream has one centrifugal blower driven by a common PSC motor. FILTERS @ 0.1" (25 Pa) 214 (101) @ 0.2" (50 Pa) 206 (97) Washable air filters in
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Clearances and Requirements Connecting Appliances to the HRV The following appliances should not be connected to the WARNING HRV: Before installation, careful consideration must • clothes dryer be given to how this system will operate if connected to any other piece of mechanical • range top equipment, i.e. a forced air furnace or air handler, • stovetop fan operating at a higher static. After installation, the • central vacuum system compatibility of the two pieces of equipment must be confirme
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Weatherhood Installation COLLARISSUPPLIEDTO ENSUREVAPOURBARRIER SCREEN CAUTION IS100%SEALEDTO (sideview) WALLPLATE Unit must be installed level to ensure proper condensate drainage. Due to the broad range of installation and operational conditions, 12"galvanized consideration must be given for the possibility pipesupplied of condensation forming on the unit or connecting ducting. Objects below the installation may be exposed to condensate. EXTERIOR • At least 3' (1 m) awa
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Air Duct Design and Installation A well designed and installed ducting system will allow the WARNING HRV to operate at its maximum efficiency. Include a short length of fabric, flex duct or Always try to keep duct runs as short and straight as pos- other non-metallic connector in the “Fresh Air to sible. See Installation Diagrams for various installation Building” hard ducted line in order to keep the options. HRV separately grounded (electrically) from the The inner and outer liners of the
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Stale Air Exhaust System Drain Connection (HRV Only) The stale air exhaust system draws air from the points in During a defrost cycle, the HRV may produce some con- the house where the worst air quality problems occur. densation. This water should flow into a nearby drain, or Stale air ducts should be installed in the bathroom, be taken away by a condensate pump. kitchen, and laundry room. Applications such as green- houses, atriums, swimming pools, saunas, etc. have unique ventilation requireme
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Installation Diagrams HRV DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN EXHAUST AIR from various parts of Return Air home. (i.e. bathrooms, kitchens) 3’ min. recommended Outdoors Cool Air Return Forced Air Furnace NOTES: 1. Furnace blower is required to operate when HRV is ON to provide good air distribution. 2. No separation requirements necessary between direct connection point and furnace. 3. Weatherhood arrangement is for drawing purposes only. 6' (2 m) minimum
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Electrical The HRV unit should be plugged into a standard designat- WARNING ed (120VAC) electrical outlet with a ground. The outlet should be serviced by a separate 15 amp/120V circuit. An In order to prevent electric shock when cleaning extension cord should not be used with this appliance. A or servicing the HRV, it is extremely important to qualified service technician should make any required confirm the polarity of the power line that is electrical connections. switched by the safety (di
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Optional Controls Optional Remote Control Devices Low Voltage DEHUMIDISTAT VENTILATION CONTROL (D.V.C.) * remove jumper on circuit board when using this control ** 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 *r
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Operation For most installations the HRV will normally be set to oper- Self Test ate continuously on low speed. To suit various lifestyles, The ventilator will automatically initiate a self test the HRV offers a selection of operating modes. sequence when power is applied. Fan motor is cycled and then damper motor is cycled. Duration: Approximately 1.5 Method of Operation mins. Good - intermittent operation at all times How much ventilation do I need? Better- continuous operation during day or o
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3/4AMPFUSE Wiring Diagrams RNC3WIRINGDIAGRAM LEGEND HIGHVOLTAGE 12VLOWVOLTAGE AUTO FIELDINSTALLED TRANSFORMER INTERFACE 12VLOWVOLTAGE RELAYCONTACTS BLACK 120V FANMOTORDETAILS POWER WHITE SUPPLY TO GREEN MOTOR GREEN AUTOTRANS T2 T3 T4 T5 T6 T7 T8 T9 N/C COMMON N/O CAPACITOR NEUTRAL SPARE LINE FAN O/P T10 T11 T12 T1 C4 C5 SEE GROUND DEFROST DETAIL P1 VDR2 DIRECTMOUNTEDCAPACITOR VDR3 K1 K2 K3 K4 8 RED FACTORY +12V INSTALLED ORANGE JUMPER OBCS DEFROSTDETAILS BLACK VDR1 DEHUMI
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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 (
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Dehumidistat Operation (HRV only) The optional HRV remote controls include a dehumidistat The dehumidistat switches the ventilator to high speed which controls humidity levels during the heating season. when the moisture level in the building exceeds the The control has a selector knob with set points ranging desired setpoint. The dehumidistat switches the HRV back from 20% to 80% relative humidity (RH). Most people are to low speed ventilation when the humidity has been comfortable when indoor
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Air Flow Balancing It is necessary to have balanced air flow in an HRV. The vol- The first step is to operate all mechanical systems on high ume of air brought in from the outside must equal the volume speed, which have an influence on the ventilation system, i.e. of air exhausted by the unit. If the air flow is not properly bal- the HRV itself and the air handler, if applicable. This will pro- anced, then: vide the maximum pressure that the HRV will need to overcome, and allow for a more accura
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Pitot Tube and Gauge Pitot Tube Air Flow Balancing Kit with magnehelic gauge, DUCT Pitot tube, hose and carry case. AIR FLOW Pitot tube Magnehelic gauge High Pressure Side Low Pressure Side Placement of Pitot Tube HRV NOTE: Graphic is for illustrative purposes only. Duct connection ports may vary. Place pitot tube a minimum of 18" from blower or elbows Note: Duct connections may vary, depending on model. Outdoors Pitot Pitot tube tube Field-supplied Balancing Magnehelic Balancing Dam
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Troubleshooting Symptom Cause Solution Poor Air Flow • 1/4” (6mm) mesh on the outside hoods is plugged • clean exterior hoods or vents • 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 • check duct installation • improper speed control setti
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Maintenance HRV 1. Inspect Exterior Hoods at least once a month. 6. Clean Duct System if Required Make sure exhaust and fresh air supply hoods are not The duct system running to and from the HRV may accu- blocked or restricted by leaves, grass, or snow. In winter, it mulate dirt. Wipe and vacuum the duct once every year. is especially important to make sure snow is not blocking You may wish to contact a Heating/Ventilation company to the hoods or that frost has not built up on the wire mesh do t
