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manual abstract
The drain line must be located in an area that is not subject to freezing and should beoutletted into floor drain sink, standpipe or condensate pump. Make sure the drain line slopes down to provide proper condensate removal. Should no "fall" be available, a condensate pump may be used. NOTE: A P-Trap must be made to prevent odours from being drawn in through the drain line. THE DUCTWORK SYSTEM A well 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. When in doubt about the airflow capacity of a duct's diameter, always install the next larger size of duct. 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 streams. We recommend that a high quality of insulated flex duct be used. Four 5 in. (13 cm) ports on the HRV are for attachment to the ductwork system. See Figure #2 for the function of these ports. FRESH AIR FROM OUTSIDE 5" 5“ STALEAIR TO OUTSIDE DAMPER DOOR DEFROST PORT 5" (13cm) filters: STALEAIR FROM HOUSE CONDENSATE TRAY Figure 2 Front View Schematic 1 -I K/ s/ s' u\ BASE MODULE CONTROL PAD BLOWERS FRESH AIR TO HOUSE 5" (13cm) NUT AND WASHER FINGER TIGHTEN ONLY!! 8 OUTSIDE WEATHERHOODS The weatherhoods must have built-in "bird" screens with 1/4 in. (.635 cm) minimum mesh to preventforeign objects from entering into the ductwork. Do not use smaller mesh as it will be very susceptible to plugging up. Flappers and dampers at the vents must not be used as they will restrict air flow and often "seize up". The preferred location of the outside weatherhoods is: • no less than 6 ft. (2 m) apart from each other • at least 18 in. (25 cm) above ground level • away from sources of contaminants, such as automobile exhaust fumes, gas meters, garbage cans, barbeques, etc. • not exposed to prevailing winds, whenever reasonably possible The outside perimeter of the weatherhood must be caulked. B DUCTING from the WEATHERHOODS Five inch (13 cm) diameter insulated duct with an integral single piece vapour barrier should be used. Duct must meet ULC Class 1 fire rating (or UL Class 1- check codes). A minimum RSI value of insulation should be equal to 0.75 (R4), or that of the local building codes. The inner and outer liners of the flexible insulated duct must be clamped to the sleeve of the weatherhood (as close to the outside as possible) and the appropriate port on the HRV. To keep the insulation and outer liner in place, a clamp and duct tape must be used. 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 acoustical sealant) will seal the inner flexible duct to both the HRV port and the weatherhood prior to clamping. To minimize air flow restriction, the flexible insulated duct that connects the two outside weatherhoods to the HRV should be stretched tightly and be as short as possible. See Figure #3 forthe recommended connection of flexible insulated ducts to both the outside weatherhoods and the HRV. Ducting from the HRV to the different areas in the dwelling is recommended to be galvanized metal whenever possible, though flexible duct can be used if so desired. WEATHERHOOD INSTALLATION BELT OF OUTSIDE WALL THERMAL COLLAR INSULATED FLEXIBLE DUCTING lAAAAA/' HOOD 1) Thermal Collar slides over galvanized sleeve of Weatherhood. 2) Fasten Thermal Collar to Belt. 3) Slide the Insulated Flexible Ducting over the Weatherhood's galvanized sleeve and fasten it to the Thermal Collar. 4) Hood is hinged to allow for easy access for cleaning of bird screen. Figure 3 Weatherhood Installation WARMSIDE DUCTING-General Main supply and return lines to/from Heat Recovery Ventilator must be 5 in. (13 cm) minimum. Branch lines to the individual rooms may be as small as 4 in. (10.2 cm), but 5 in. (13 cm) lines are preferred whenever possible. To minimize airflow losses in the ductwork system, all ducts should be as short as possible and with as few bends or elbows as possible. 45° elbows are preferred to 90° elbows, whenever possible. Use Y tees instead of 90° tees whenever possible. All duct joints must be fastened with screws, rivets or duct sealants and wrapped with a quality duct tape to prevent leakage. We recommend aluminum foil tape. To avoid possible noise transfer through the ductwork system, a short length approximately 12 in. (30 cm) of non-metallic flexible duct may be connected between the HRV and the supply/exhaust ductwork system. A canvas duct connector can also be used to connect the HRV to the rigid ductwork. The use of TECHGRILLES™ (from NUTECH) as supply air diffusers and air exhaust covers are recommended. They are ...
Other models in this manual:Fans - 100 DEF (2.47 mb)