Rev. December 19, 2008
Page 7 of 19
Connecting To Other Equipment - Residential Applications
Your
Nu-Air
HRV is not intended to be connected to other equipment or appliances. Interconnection
with a forced air furnace duct system is permissible; refer to sections 2.2.2 through 2.2.3.1 and section
3.7.
2.6.
Ductwork
Duct runs should be straight with a minimum of bends and elbows. Joints should be tight fitting and
sealed with duct tape or duct sealer. Install the two balancing dampers (supplied) in the supply air and
return air ducts close to the unit and 12” from an elbow or flow collar.
RECOMMENDATION:
Use galvanized duct
whenever possible. Although flexible duct can be used,
its use should be restricted to areas indicated (outside
hoods and unheated spaces).
Ducting must be supported according to the manufacturers
specified hanger system and intervals.
RECOMMENDATION: An engineer or other qualified
person should design the duct system.
2.7.
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 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
