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(See Fig. 8.) This can act as a silencer when connecting ducts to return- --air duct system. This should eliminate transmission of noise or vibration from unit to main duct system. STALE-AIR RETURN FRESH-AIR SUPPLY FLEXIBLE DUCTS CONNECTING TO RETURN-AIR DUCT SYSTEM A08102 Fig. 8 - --Flexible Duct Fit- --Up Locate and Install Exterior Hoods IMPORTANT: To prevent condensation problems, insulated flexible ducts are required on both fresh- --air inlet and exhaust- --air outlet ducts connecting between ERV/HRV and exterior wall. Fresh- --air intake and stale- --air exhaust must be separated by at least 6 ft (1.8m). Fresh- --air intake must be positioned at least 10 ft (3m) from nearest dryer vent, furnace exhaust, driveway, gas meter, or oil fill pipe. Fresh- --air intake must be positioned as far as possible from garbage containers and potential chemical fumes. When possible, it is advised to locate the intake and exhaust hoods on same side of house or building. The intake and exhaust hoods should never be located on interior corners or in dead air pockets (See Fig. 7). Both intake and exhaust hoods must be 18- --in. (457mm) from ground and at least 12- --in. (305mm) above anticipated snow level. After selecting proper hood locations, make appropriate size hole through exterior wall, pass flexible duct through hole and insert hood tube into duct. Tape duct vapor barrier tightly around hood tube and insert assembly back into wall and fasten securely. Condensate Drain (For ERV, skip this step and continue to the next step.) To connect condensate drain, proceed as follows: 1. Punch out holes in foam insulation and door, then insert sleeved grommets into bottom of unit using the gasket washer and nut. (See Fig. 9.) 2. Cut two sections of plastic tubing, about 12- --in. / 305mm long and attach them to each drain. 3. Join the two short sections of plastic tubing to the “T” connector and the main tube as shown. 4. Make a loop in the tubing below the “T” connector to create a trap to prevent sewer gases from entering the ventilation system. (See Fig. 9.) 5. Connect unit drain to building’s main drain. Provide slight slope from unit for run- --off. A99268 Fig. 9 - --Condensate Drain With Loop Trap (HRV Only) WALL CONTROL Types Four remote wall control options are available: 1. Basic Control (see Table 1). 2. OneTouch Control 3. Standard Control (includes dehumidistat) 4. Latent Control (includes humidistat for use with ERV’s only) Table 1 – Basic Control DAMPER FAN POSITION SPEED Closed to outside Off Open to outside Low Open to outside Low Air exchange with MODEOPERATIONOffOffLowAirexchangewithoutsideIntermittentAirexchangewithoutsideHigh Open to outside High outside Location The Standard Control and the Latent Control sense humidity and not temperature. They must be located in an area where they will continually monitor fresh air circulating within the home. Install ERV/HRV wall controls as close as possible to main system thermostat and follow same guidelines as installing a thermostat (locate approximately 5 ft (1.5m) above floor, mount on an inside partitioning wall, etc.) Wiring Remove top cover assembly from wall control and pass thermostat wire through hole located on back of control before attaching to wall. Connect Y, R, G, and B (yellow, red, green, and black) 4 between wall control and ERV/HRV connector following color code. (See Fig. 5 and 10.) Replace top cover assembly. NOTE: ERV/HRV wall control and circuit board operate on 12VDC. YELLOW Y R GB RED GREEN BLACK A98383 Fig. 10 - --Typical Wall Control Operation The Standard and Latent wall controls have 4 basic modes of operation, OFF, LOW, HIGH, and INTERMITTENT. Be sure that all modes of operation are fully functional. See Table 1 indicating standard control operation. 1. With switch off, ERV/HRV is inoperative and the LED is out. 2. With switch on LOW, ERV/HRV continuously exchanges air with outside. If control is satisfied, blower will run in low speed, otherwise, blower will run on high speed. The LED is illuminated all the time. 3. With switch on INTERMITTENT, the ERV/HRV exchanges air with outside on high- --speed blower, and unit shuts down when control is satisfied. The ON LED is illuminated all the time, and AIR EXCHANGE LED is illuminated only when unit is running. Humidity Selector The humidity selector is a built- --in control designed to properly control the level of humidity in the house during the winter and summer months. This control helps avoid condensation problems in upper northern regions where indoor humidity is a problem during the winter season. NOTE: This control is not to be confused with a dehumidistat used during the summer months to control high relative indoor humidity. Table 2 recommends humidity levels to avoid condensation. Table 2 – Recommended Humidity Levels DOUBLE---PANE TRIPLE---PANE WINDOWS WINDOWS 55% 65% 45% 55% 35% 45% 30% 45% OUTSIDETEMPERATURE50°F/10°C32°F/0°C14°F/---10°C---4°F/---20°C---22°F / ---30°C 25% 35% ...

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