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Safety Considerations
Hazards may exist within this equipment because it
contains electrical and powerful moving components.
Only qualified service personnel should install or service
this equipment. Untrained personnel can perform basic
maintenance such as maintaining filters. Observe pre-
cautions marked in the literature and on labels attached
to the unit. Follow all safety codes.
WARNING
Disconnect the main power switch to the unit before
performing service or maintenance. Electric shock can
cause personal injury.
Installation
Inspection
Inspect the exterior of the unit for shipping damage by
ensuring that there is no damage to the door, door latches,
door hinges, damper, duct collars, cabinet, etc. Inspect the
interior of the unit for damage by ensuring that the fan
motors and housings, heat exchanger, insulation,
dampers, actuators and drain pans are all intact.
If transportation damage is found, file a claim immediately
with the transportation agency. Remove all packaging, tape,
etc. from the cabinet.
Mounting Location Requirements
When determining an installation location, the unit must
be mounted in a heated area to prevent condensate drain
lines from freezing. The mounting location should be
away from occupied areas to provide quiet operation. The
area should also be easily accessible for maintenance.
NOTE: These Heat Recovery Ventilators have minimum
clearance requirements when mounting. See
Appendix B for specific clearance requirements.
Mounting options must allow 6" [152mm] clear-
ance in front of control cover for access.
A mounting location close to an exterior partition will
minimize the length of insulated duct. The unit should be
close to a drain and 120 volt, 60 Hz power supply. The
unit should be mounted away from hot chimneys, electri-
cal panels and other hazards. The area should also be
easily accessible for maintenance.
Mounting Options
There are several options for hanging or floor mounting
the unit.
NOTE: In all cases, the unit must be level. Consult local
building code for restrictions in your area regard-
ing installation.
Hang the unit with the reinforced rubber straps provid-
ed as shown in Appendix A. Check with local building
codes regarding the use of rubber straps in commercial
buildings. Attach the straps to the unit with two #8 screws
provided. Then attach the other end of the strap to the
ceiling joists, trusses, custom frame, etc.
The unit can also be hung with 3/8" [10mm] threaded
rod and U channels or angles (not supplied) as shown in
Appendix A.
When installing the unit, keep in mind that access to the
control panel may be required. Supply and exhaust ducts
to outside may have 1" to 2" [25 to 51mm] of insulation on
them. Rubber vibration isolation may be required and is
recommended for quiet operation.
The unit can also be mounted on a metal or wooden
curb (not supplied) bolted to the floor as shown in
Appendix A. Space must be left under the unit to allow
connection of drain lines. A gradual slope is required
for the condensate water to drain by gravity (minimum
1/4"/foot) [6mm/305mm]. If this is not possible, a pump
should be used. If attachment of the unit to the curb
is required, ensure that screws, bolts and mounting
hardware do not interfere with moving parts or that the
integrity of the cabinet insulation is not affected.
Ductwork
The supply and exhaust duct connections on the unit
are as follows:
UNIT
600 cfm or 700 cfm
1150 cfm
NOTE: Duct sizes are for connection purposes only.
Ducts should be sized to keep noise and pressure
drop to a minimum.
The supply and exhaust ducts connected to outside, as
well as any ducts passing through an unconditioned
space, must have a minimum insulation value of R5. In
addition, a continuous integral vapor barrier over the duct
insulation must be used.
Air balancing dampers are recommended for both sup-
ply and exhaust ducts to allow for adjustment of airflow.
Also, flexible canvas connectors should be installed close
to the unit in the supply duct to the building and the
exhaust duct from the building to reduce noise transmis-
sion from the unit to the building (see Appendix C).
All ports on the 600 cfm and 1200 cfm units have 1"
[25mm] flanges to facilitate the installation of the duct-
work. Please note that the "Fresh Air from Outside" port
has a frost control damper incorporated with it. Ensure
that any mechanical fasteners used to connect the duct
do not interfere with the operation of the damper. Screws
can be installed on the side of the cabinet rather than
the flange for this port only. For port locations see
Appendix B.
All ports on the 700 cfm unit have 2" [51mm] flanges to
facilitate the installation of the ductwork. Please note the
"Fresh Air From Outside" connection is factory set to be
the left side upper port. It is possible to reverse the opera-
tion of the frost control damper in order to use the port on
top of the cabinet for "Fresh Air From Outside" connection.
- 3 -
DUCT SIZE
14" x 8" [356 x 203mm]
20" x 8" [508 x 203mm]
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