Nu-Air Ventilation Systems Inc. - HRV Operating &Installation Manual
Revised April 27, 2012
Page 4 of 17
3.1
Control Options
A local On/Off switch is supplied with the unit. Provision is made for remote switching. Any
customer supplied switch will work. Control voltage is 24 VAC.
An optional end switch/interlock can be supplied at the time of ordering.
3.2
Disconnect
The unit comes complete with a 25 Amp non-fused disconnect.
3.3
Defrost Adjustments
Temperature Fan Defrost – clockwise rotation is cooler (less defrost)
Timed Fan Defrost – increase the ON time or decrease the OFF time for more defrost. Decrease
the On time or increase the OFF time for less defrost.
4
MAINTENANCE
NOTE:
Disconnect power before servicing.
4.1
Filters
Dirty filters can reduce ventilation efficiency, resulting in unbalanced airflow and damage or
shorten the life of the motors. Check at least every three months and replace yearly or when
necessary depending on indoor and outside air conditions.
Fresh Air Filter - 16" x 24" x 1" quantity of 2; MERV 8
Exhaust Air Filter - 12" x 24" x 1" quantity of 2; MERV 8
Nu-Air recommends a spare set (4 pcs) of filters be ordered with the H/ERV for maintenance
stores.
4.2
Fans (FC DWDI 810 - belt drive)
When inspecting the filters, take the opportunity to vacuum any interior surfaces including the
fan blades.
4.3
Motors (2 x 1.5 hp – single speed)
The motors are equipped with permanently sealed and lubricated bearings.
