Place Heat Pump or Air Conditioning Unit in
To prevent property damage, the unit should remain in
an upright position during all rigging and moving
operations. To facilitate lifting and moving when a crane
is used, place the unit in an adequate cable sling.
To prevent property damage, personal injury or death,
ensure the roof has sufficient structural strength to carry
the weight of the unit(s), roof curb, snow loads and water
loads as required by local codes. Consult a structural
engineer to determine the weight capabilities of the roof.
To avoid possible personal injury, a safe, flat surface for
service personnel should be provided.
IMPORTANT: If you are using a bottom discharge with the roof
curb, the ductwork should be attached to the curb prior to the
installation of the unit.
Lower the unit carefully onto the roof mounting curb. While you
are rigging the unit, the center of gravity will cause the condenser
end of the unit to be lower than the supply air end.
Placeholder for Rigging art
Connect Condensate Drain
The condensate drain connection of the evaporator is a half
coupling of ³⁄₄" N.P.T. A ³⁄₄" drain line with trap must be installed
on all applications to avoid accumulation of condensate.
Condensate Drain Connection
Install the condensate drain trap as shown. Use a ³⁄₄" (1.9 cm)
NPT drain connection size or larger.
An external trap must be installed for proper condensate
Unit must be level or slightly inclined toward drain.
A. Drain connection
B. 2" (5.1 cm) minimum
C. 3" (7.6 cm) minimum
Install ductwork in accordance with NFPA 90B and any local
When the unit is installed so that the supply ducts carry air
circulated by the unit to areas outside the space containing
the unit, the return air shall be handled by a duct or ducts
sealed to the unit casing and terminated outsides the space
containing the unit.
If there is no complete return air duct system, the return air
connection must be sealed to the unit casing and run full size
to a location outside the utility room or space housing the unit
to avoid a negative pressure on the venting system.
Filters are not provided with unit, and must be supplied and
installed in the return duct system by the installer. A field installed
filter grille is recommended for easy and convenient access to
the filters for periodic inspection and cleaning. Filters must have
adequate face area for the rated quantity of the unit. See the Air
Delivery Table for the recommended filter size.
Air Delivery Table
Airflow - SCFM
Minimum Filter Size
Nominal Size—in. (cm)
10 x 20 (25.4 x 50.8)
14 x 20 (35.6 x 50.8)
14 x 25 (35.6 x 63.5)
15 x 20 (38.1 x 50.8)
16 x 20 (40.6 x 50.8)
16 x 25 (40.6 x 63.5)
20 x 20 (50.8 x 50.8)
20 x 25 (50.8 x 63.5)
25 x 25 (63.5 x 63.5)
D. Positive liquid seal (required)
E. Flexible tubing, hose or pipe
Nominal Area—sq ft (cm