Nu-Air Ventilation Systems Inc. - HRV Operating &Installation Manual
Rev October 10, 2010 - 11 -
3.6. Drain Connections
Access to a drain or sump is required to handle the HRV condensate. Care should be taken to run the
condensate tube where it cannot freeze.
For best results, Nu-Air recommends the following steps be followed when installing drain kits on residential
HRV's.
1. Apply the rubber O-ring supplied to the flange of each drain spout (A)
2. Insert the drain spouts through the holes in the drain pan (B)
3. Use the speed nut to tightly secure the drain spout
4. Cut two lengths of drain hose (E) long enough to avoid kinking
5. Attach the hose to the drain spout by sliding it over the spout until it is tight to the bottom of the speed nut.
Repeat for the other side
6. Secure the hose to the spout with the plastic tie wraps (D)
7. Install the Tee (F) in either of the two ways shown in the drawings below
8. Attach the free end of the hose to the left fitting. Repeat for the other side
9. Use the remaining hose to form a "P" trap and terminate at the top of the tee
10. Pour approximately one cup of water into the drain assembly to form an air seal. This prevents gasses
from being drawn into the HRV
3.7. Balancing the System
See illustration on following page.
Balanced air flow between the supply and exhaust air streams is essential to the performance of an HRV
or ERV. With the ES Series, changing motor speeds or balancing is quick and simple with two buttons
recessed slightly into the unit’s cabinet. NO BALANCING DAMPERS ARE REQUIRED.
To balance the system or adjust motor speeds, use the following procedure:
1. Use a jumper wire or remote control to put the unit into high speed.
2. Press and hold either the FRESH air or EXHAUST air pushbuttons (not both) for 3 Seconds.
When you release the pushbutton, this will place the unit in BALANCING MODE.
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