Installation Instructions for Heat Recovery Ventilators with 2 Speed RNC Electronics RNC Series Models RNC95 RNC155 RNC200 RNC10 RNC20 RNC120D RNC5-TPD Residential Heat Recovery Ventilators (HRV) Manufactured with 2 Speed RNC Electronics TI-RNC 0108
Table of Contents Introduction Introduction.........................................................................2 The Lifebreath HRV (Heat Recovery Ventilator) is designed to introduce fresh outdoor air into a building while exhausting an equal amount of stale indoor air. Engineering Data - RNC95 .............................................3-4 Engineering Data - RNC155...............................................
Engineering Data - HRV Model RNC95 THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE The cross-flow heat recovery core transfers heat between the two airstreams. It is easily removed for cleaning or service. MOTORS AND BLOWERS Each air stream has one centrifugal blower driven by a common PSC motor. 2 speed fan operation. FILTERS Washable air filters in exhaust and supply air streams.
Port Configuration and Airflow Model RNC95 In order to make the RNC95 as space efficient as possible, the INDOOR supply and return ports are converted from round to oval shape. Overall size of the port remains the same. Simply bend a standard duct fitting to the correct shape, and attach to the oval port using the same method as for a round port.
Engineering Data - HRV Model RNC155 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 centrifugal blower driven by a common PSC motor. 2 speed fan operation. FILTERS Washable air filters in exhaust and supply air streams.
Engineering Data - HRV Model RNC200 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 to medium low. Off (Standby)/Low or OFF/HIGH speed operation is also available.
Engineering Data - HRV Model RNC10 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 centrifugal blower driven by a common PSC motor. 2 speed fan operation. FILTERS Washable air filters in exhaust and supply air streams.
Engineering Data - HRV Model RNC20 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 to medium low. Off (Standby)/Low or OFF/HIGH speed operation is also available.
Engineering Data - HRV Model RNC5-TPD CONTROLS- HRV System Control HRV defaults to user selected speed from switch on top of cabinet when plugged in. HIGH SPEED option is accessible by connecting remote controls to designated terminals inside electrical box of HRV. OFF(Standby)/LOW or OFF/HIGH speed operation is also available.
Engineering Data - HRV Model RNC120D OPTIONAL TIMERS 99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20 gauge wire (min.) 100’ length 99-104 Digital Electronic Timer- initiates high speed ventilation for 20, 40 or 60 minutes, (3 wire) 20 gauge wire (min.) 100' length 99-101 60 Minute Crank Timer - initiates high speed ventilation for up to 60 minutes, (2 wire) 20 gauge wire (min.) 100' length (max.
Engineering Data - HRV Model RNC120D Option 1 - Horizontal Duct Configuration Dimensions inches FRESH AIR STALE FROM AIR TO OUTSIDE OUTSIDE HANGING STRAPS 22” (559 mm) STALE AIR FROM BUILDING FRESH AIR TO BUILDING 25 1/8” (637 mm) BOTTOM VIEW FOR HORIZONTAL MOUNT SERVICE CLEARANCE FROM BOTTOM OF UNIT IS MINIMUM 3’0” STALE AIR TO OUTSIDE FRESH AIR TO BUILDING 9-1/8” (232 mm) FRESH AIR FROM OUTSIDE STALE AIR FROM BUILDING ALL DUCT COLLARS ARE 5” DIAMETER ACCESS DOOR SIDE VIEW FOR HORIZONTAL MO
Remote Control Devices Optional Main Control Features The Dehumidstat The amount of ventilation required in your home will fluctuate according to the activity level in the house. Higher activity levels require more ventilation. Main controls can be mounted in a central location of the home (i.e. beside the furnace thermostat) which will provide the user with complete control over their ventilation system from a convenient location.
Locating and Suspending the HRV Location Selection The HRV must be located in a heated space where it will be possible to conveniently 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.
Suspending the RNC120D Horizontal Installation ATTENTION The unit must be mounted level for proper drainage of the condensate pans. JOIST FASTENERS (not supplied) STRAPS AND SCREWS (supplied) DETAIL Using full length hanger straps is recommended for vibration control, but can be shorter if required. Vertical Installation Wall Mounting the HRV "L" BRACKETS (not included) may be installed if wall mounting is desired for the vertical installation.
Drain Connections Drain Connection (HRV Only) During a defrost cycle, the HRV may produce some condensation. This water should flow into a nearby drain, or be taken away by a condensate pump. "P" Trap (HRV only) DRAIN HOSE PLUMBING PRE-PUNCHED HOLES (2) DRAIN PAN CAUTION DRAIN PAN DRAIN SPOUT The HRV and all condensate lines must be installed in a space where the temperature is maintained above the freezing point or freeze protection must be provided. DRAIN SPOUT ZIP TIE TEE CONNECTOR 1/2 " I.D.
Installation Methods The Three Methods of Installation The three methods of installation for the HRV system are the Simplified, Partially Dedicated and Fully Dedicated Installations. Refer to the installation illustrations in this manual. 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 possible. See Installation Diagrams for various installation options.
The Simplified Installation (Return/Return Method) • It is mandatory that the furnace run continuously or HRV WARNING operation be interlocked with the furnace. • Check local codes/authority having jurisdiction for acceptance. HRV must be balanced. Refer to “Airflow Balancing” in this manual. FOUR PORT MODELS RETURN AIR DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN 40" (1m) MINIMUM 3' (1 m) min.
The Partially Dedicated Installation • Stale air drawn from key areas of home WARNING (bathroom, kitchen, laundry) • Fresh air supplied to return air duct of air handler HRV must be balanced. Refer to “Airflow Balancing” in this manual. FOUR PORT MODELS DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN (Stale air drawn from key areas of home) EXHAUST AIR from various parts of home. i.e. bathrooms (if required), kitchens (if required). Return Air Outdoors 3' (1 m) min .
The Fully Dedicated Installation • Stale air drawn from key areas of home WARNING (bathroom, kitchen, laundry) • Fresh air supplied to main living areas of house HRV must be balanced. Refer to “Airflow Balancing” in this manual. FOUR PORT MODELS - Models RNC155/RNC200 Stale Air from various parts of home. i.e. bathrooms (if required) kitchens (if required) Outdoors Fresh air to house main living areas... bedrooms, living room, rec. room etc.
Grilles and Weatherhoods Lifebreath Kitchen Grille Grilles REMOVABLE FILTER 6” x 10” Kitchen Grille Part No. 10-002 Replacement Grease Filter Part No. 10-002-2 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 connected to a range hood. They should be installed at least 4 feet (1.2m) horizontally away from the stove.
Electrical The HRV unit should be plugged into a standard designated (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.
Wiring the Controls Dehumidistat Ventilation Control 2040 ON/OFF Dehumidistat Part No. 99-116 Part No. 99-2040 Red to Red Orange to Orange Black to Black Remove factory installed jumper when installing this control DEHUMIDISTAT Red to Red Remove factory installed jumper when installing this control Orange to Orange Black to Black Low Fan to Blue Circuit Board Terminal Strip Circuit Board Terminal Strip Remote Dehumidistat Recirculation Control Part No. 99-130W Part No.
Defrost Operation Recirculating Damper Defrost (4 port models) The recirculating damper defrost HRV has an electronically controlled damper defrost mechanism. The defrost timer is activated when the outside temperature drops below 27°F (3°C). A motor driven damper door mechanism closes off the supply air from outside allowing the exhaust air to recirculate through the unit. After the defrost period, the damper operates in the opposite direction to reopen the fresh air port.
Air Flow Balancing The first step is to operate all mechanical systems on high speed, which have an influence on the ventilation system, i.e. the HRV itself and the air handler, if applicable. This will provide the maximum pressure that the HRV will need to overcome, and allow for a more accurate balance of the unit. It is necessary to have balanced air flow in an HRV. The volume of air brought in from the outside must equal the volume of air exhausted by the unit.
Air Flow Balancing Pitot Tube and Gauge Pitot Tube Air Flow Balancing Kit Part No. 99-167 1 - magnehelic gauge 1 - Pitot Tube and hose 1 - Carry Case DUCT AIR FLOW ATTENTION Pitot tube Apply use of balancing dampers as required. Magnehelic gauge High Pressure Side LIC MAGNEHE NOTE Graphic is for illustrative purposes only. Duct connection ports may vary.
Air Flow Balancing using AccuFlow Gauge Part No. 99-170 Models RNC155 and RNC200 Only AccuFlow Gauge Kit 1 - Accu-Flow Balancing Gauge 2 - Connection Hoses 4 - Rubber Fittings 1 - Instruction Page Lifebreath Accu-Flow is designed to quickly and accurately balance the airflows on units equipped with balancing ports. Normally the HRV/ERV would be balanced on high speed.
Air Flow Balancing using the Door Ports Models RNC155 and RNC200 Only The door ports ( MODELS RNC155 & RNC 200) are designed to quickly and measure the airflows for balancing. Magnehelic Door Port Balancing Kit Normally the HRV would be balanced on high speed. If the HRV is connected to a forced air system, both systems should be set to run at the highest operational speed when balancing is performed. Use the Magnehelic Gauge Kit (Part No. 99-206) for door port balancing. Part No.
Interlocking HRV Operation to an Airhandler/Furnace Blower When using the Interface relay contacts to initiate blower operation on a furnace, 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 terminal is connected to the G terminal internal to the stat.
Wiring Diagrams Model RNC5-TPD RED BLUE TO MOTORS INTERFACE RELAY CONTACTS DEFROST DETAILS Model RNC5 (Only) PCB PLUG - IN 1 2 P1 PLUG IN CONNECTOR BI-DIRECTIONAL DAMPER MOTOR BLACK BLACK ORANGE ORANGE RED RED 3 4 PIN 1 - RED PIN 2 - ORANGE PIN 3 - BLACK PIN 4 - SPARE 29
RNC120D HRV Control Box TO MOTORS BLUE Wiring Diagrams INTERFACE RELAY CONTACTS DEFROST DETAILS PCB PLUG - IN 1 2 P1 PLUG IN CONNECTOR BI-DIRECTIONAL DAMPER MOTOR BLACK BLACK ORANGE ORANGE RED RED 3 4 PIN 1 - RED PIN 2 - ORANGE PIN 3 - BLACK PIN 4 - SPARE 60-120D-WIRING 30
Wiring Diagrams RNC95/RNC10/RNC20/RNC155/RNC200 RNC3 WIRING DIAGRAM LEGEND HIGH VOLTAGE 12V LOW VOLTAGE AUTO TRANSFORMER 120V POWER SUPPLY RED BLACK BLUE WHITE WHITE FAN MOTOR DETAILS INTERFACE RELAY CONTACTS BLACK FIELD INSTALLED 12V LOW VOLTAGE TO MOTOR BLACK T6 T9 GREEN GREEN AUTO TRANS ORANGE YELLOW CAPACITOR T2 ITE WH D RE T3 T4 T5 T6 SPARE NEUTRAL T7 LINE T8 T9 FAN O/P N/C COMMON N/O T10 T11 T12 8 K4 T1 C4 SEE DEFROST DETAIL C5 GROUND P1 VDR2 DIRECT MOUN
Troubleshooting Symptom Cause Solution Poor Air Flow • • • • • • • • • • clean exterior hoods or vents • remove and clean filter • remove and clean core • check and open grilles • open and adjust dampers • have electrician check supply voltage at house • check duct installation • increase the speed of the HRV • have contractor balance HRV Supply air feels cold • poor location of supply grilles, the air flow may irritate the occupant 1/4” (6mm) mesh on the outside hoods is plugged filters plugged cor
Maintenance HRV 1. Inspect Exterior Hoods at least once a month. 4. Motors - Maintenance Free 5. Drain (condensate) Line - Clean Once a Year 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). Inspect drain line, drain spout and “P” trap for blockage, mold or kinks.