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3.7
Drain Connections
Access to a drain is required to handle the HRV
condensate. Care should be taken to run the condensate
tube where it will not freeze.
For best results, Nu-Air recommends the following steps
be followed when installing drain kits.
1. Apply the 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 long enough to
avoid kinking. (E)
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.
6. Secure the hose to the spout with the plastic tie wraps. (D)
7. Install the tee fitting as shown in the drawing below. (F)
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 water into the drain assembly to form an air seal. This prevents gasses from being
drawn into the HRV.
4 Connecting to Other Equipment
In general the H/ERV is not intended to be connected to other equipment or appliances.
Connection with a forced air furnace or air handler is common practice but additional controls
must be in place.
If the H/ERV is used upstream of an air handler or similar equipment (e.g. fresh air into
economizer section), the start-up sequence must be H/ERV first followed by the air handler.
Starting the air handler first, will rotate the H/ERV's fresh air fan backward. If the motor is
unable to overcome the extra load an over amp situation will result.
5 External Connections
For electrical hook-up, the H/ERV should be connected to its own circuit using electrical wire
and conduit in accordance with code requirements.
Nu-Air H/ERVs are equipped for remote controls. Options include occupancy, humidity and gas
sensors, timers, off/on/intermittent-on, and low-high switching.
Rev 2.3 July 17, 2017
10
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