3
SHIPPING RAILS
C06273
Fig. 2 --- Shipping Rail Removal
IMPORTANT: The gasketing of the unit to the roof curb is critical
for a watertight seal. Install gasket with the roof curb as shown in
Fig. 1. Improperly applied gasket can also result in air leaks and
poor unit performance. Do not slide unit to position on roof curb.
Alternate Unit Support
When a curb cannot be used, install unit on a noncombustible
surface. Support unit with sleepers, using unit curb support area. If
sleepers cannot be used, support long sides of unit with a minimum
of 3 equally spaced 4-in. x 4-in. pads on each side.
Slab Mount (Horizontal Units Only)
Provide a level concrete slab that extends a minimum of 6 in.
beyond unit cabinet. Install a gravel apron in front of condenser
coil air inlet to prevent grass and foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
Step 2 —Remove Shipping Rails
Remove shipping rails prior to lowering unit onto roof curb. (See
Fig. 2.) The rails are attached to the unit at both the return end and
condenser end. Remove the screws from both ends of each rail. Be
careful not to drop the rails onto any surface that could be
damaged. Discard the rails. It is important to replace the screws
into the unit to avoid any air or water leakage.
PERS ONAL INJUR Y AND PROP ER TY DAMAGE HAZARD
Failure to follow this caution may result in damage to roof.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck.
CAUTION
!
Step 3 —Rig and Place Unit
Inspect unit for transportation damage. See Table 1-3 for physical
data. File any claim with transportation agency.
Do not drop unit; keep upright. Use spreader bars over unit to
prevent sling or cable damage. Rollers may be used to move unit
across a roof. Level by using unit frame as a reference. Leveling
tolerance is ±
1
/
16
in. per linear ft in any direction. See Fig. 3 for
additional information and unit rigging weight.
Four lifting holes are provided in the unit base rails as shown in
Fig. 3. Refer to rigging instructions on unit.
Positioning
Maintain clearance, per Fig. 6, around and above unit to provide
minimum distance from combustible materials, proper airflow, and
service access.
Do not install unit in an indoor location. Do not locate air inlets
near exhaust vents or other sources of contaminated air.
Although unit is weatherproof, guard against water from higher
level runoff and overhangs. Locate unit at least 10 ft away from
adjacent units.
50PG20 ---28
To Next Page
Loading...
