Indoor Unit; Unit Arrangement Db / Hz - Greenheck IG Installation, Operation And Maintanance Manual

Installation of Indoor Hanging Unit
NOTE
To prevent premature heat exchanger failure, do not
locate units where chlorinated, halogenated, or acid
vapors are present.
1. Install Hangers
Install threaded hangers from ceiling supports. When
locating hangers, allow enough room to open the unit's
access panel(s). Two nuts must be used on the end of
each threaded hanger. Ceiling supports are supplied by
others.
2. Install Unit
Raise the unit into place. Using two nuts per hanger,
fasten the unit supports to hangers under the unit.
Appropriate unit supports, such as a c-channel or angle
iron (supplied by others) should be used.
Using self-tapping screws, attach ductwork to unit. In
order to prevent the unit from swinging and to provide
a safe environment for service and maintenance,
additional field-provided measures must be taken to
secure the unit in all directions.
Ceiling Supports
Hangers
Unit Supports
Indoor Mounting
NOTE
Two nuts must be used on each end of each threaded
hanging rod for proper support.
WARNING
All factory-provided lifting lugs must be used when
lifting any unit. Failure to comply with this safety
precaution could result in property damage, serious
injury or death.
NOTE
Good duct practices should be followed for all
ductwork. Ductwork should be installed in accordance
with SMACNA and AMCA guidelines, NFPA 96 and
any local codes. Reference the CAPS submittal for
duct sizes.
3. Install Vent Piping
Refer to the Indoor Venting Instructions. Refer to your
unit submittal to determine the correct venting option.
NOTE
Vent piping is supplied by others and not supplied by
manufacturer.
4 Model IG / IGX Make-Up Air
Installation of Arrangement
Downblast (DB) / Horizontal (HZ)
1. Install Curb and/or Equipment
Support(s)
Position curb/equipment support(s) on the roof
(reference the CAPS submittal for placement of curb/
equipment support(s) in relation to the unit). Verify that
unit supports are level; shim if necessary. Attach curb
to roof and flash into place. Attach the equipment
support(s) to the roof, remove metal cover, flash to
wooden nailer, and reinstall cover.
Refer to Outdoor Venting instructions when locating
the unit.
Ductwork 2. Install Ductwork
Good duct practices should be followed for all
ductwork. All ductwork should be installed in
accordance with SMACNA and AMCA guidelines,
NFPA 96 and all local codes. Reference the CAPS
submittal for ductwork size and location.
Supply Air Ductwork
(Arrangement DB only)
The use of a duct adapter is recommended on a
downblast (DB) arrangement to align the ductwork
with the supply unit. The duct adapter is only a guide
and is not to be used as support for the ductwork.
3. Apply
Sealant
Apply an appropriate
sealant around the
perimeter of the curb
and duct adapter(s)
to isolate fan
vibration and prevent
water penetration.
4. Install Unit
Use a crane and
a set of spreader
bars hooked to the
Roof Curb
Metal Cover
Equipment
Support
Roof Curb and Equipment Support
NOTE
NOTE
Setting Unit
Ductwork
®