Location for Mounting | The Ductwork System |
The HRV must be located in a heated space where the surrounding air temperature does not fall below 60˚F (16˚C). The unit must be mounted level (horizontal) to obtain proper drainage or water from the heat exchange element and drip pans. The warranty will be void if these conditions are not met.
Typically, the HRV is positioned close to an outside wall or the roof to simplify the connections and keep the length of insulated ducting required for the fresh air intake to a minimum.
A minimum clearance of 30 inches (76 cm) in front of the HRV is recommended to service the heat exchanger cores and the filters. The HRV may be mounted on an equipment platform providing the drain hoses are clear and there is sufficient space to open the doors for servicing.
Install the drain pans in the bottom of the HRV so the drain connections protrude through the holes provided. Use drain hoses with hose clamps to connect the drain pan outlets to a floor drain or standpipe. Make sure the drain line slopes down to the outlet. If this is not possible a condensate pump will be required for positive removal of the water. Protect the drain line from freezing.
A properly designed ducting system will allow the HRV to operate at its maximum efficiency. (Air flow will be restricted by undersized ducting, use of too many elbows, tees, bends, etc.). Always try to keep duct runs as short and straight as possible.
NOTE: Fully insulated ducting with an integral vapour barrier must be used on all runs passing through unheated areas in order to avoid condensation problems and energy losses from the air steams.
All joints must be airtight, sealed and impervious to moisture. See specification sheets for each unit for exact duct sizes and location.
To minimize pressure drop and noise, galvanized metal ducts, properly sized, are recommended. Keep ducting as short as possible and use a minimum of elbows and tees. Connecting sections and shorter runs may be flexible ducting one size larger than the metal equivalent. Use flexible duct connectors at the HRV to avoid noise transmis- sion.
All duct joints must be secured with screws, rivets or duct sealant and sealed with aluminum duct tape to prevent leakage.
HRV CABINET
DRAIN
SPOUT | DRAIN | |
SPOUT | ||
| ||
TAPE | TEE | |
| ||
| CONNECTOR | |
| TO DRAIN |
Forming the “P” Trap
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