Nu-Air Ventilation Systems Inc. - HRV Operating &Installation Manual
Revised April 27, 2012
Page 8 of 17
6.5
Port Configurations
1
3
C
4
2
3
1
G
2
4
1 – outside air
2 – supply air 3 – return air 4 – exhaust air
All duct connections are 24”x12”.
6.6
Mounting and Noise Control
For maximum efficiency, the H/ERV should be installed in a heated area.
6.6.1
Fastening Nu-Air Commercial H/ERV's in place:
The unit is intended to be floor mounted using typical HVAC isolation methods, such as
anchoring bolts and compression springs or a suitable equivalent.
Suspension mounting (by others) using threaded rod, “U” channel, and vibration isolation is
permissible, ensure rods do not obstruct access for maintenance and service.
Flexible duct connector (PRO flex or other) should be used at all four collars of the HRV to
isolate vibration.
6.7
Connecting To Other Equipment
If the HRV is used upstream of an airhandler or similar equipment (fresh air into economizer
section e.g.),
the start up sequence must be HRV first followed by the
airhandler
. If the
airhandler is started first, the HRV's fresh air fan will rotate backward, and the motor may not be
able to overcome the extra load causing an over amp situation.
6.8
Ductwork
Duct runs should be straight with minimum bends and elbows. Joints should be tight fitting and
sealed with high velocity, fiber reinforced duct sealant or good quality duct tape.
