Installation, Operation and Maintenance Manual : 036-1011(0806)
Page 5
LOCATION
Use the following guidelines to select a suitable location for
these units :
1. Unit are designed for outdoor installation only.
2. Condenser coils must have an unlimited supply of air.
3. Where a choice of location is possible, position the unit
on either north or east side of building.
4. For ground level installation, use a level concrete slab.
The length and width should be at least 6 inches greater
than the unit base rails. Do not tie slab to the building
foundation.
5. Roof structures must be able to support the weight of the
unit and its options and/or accessories. Unit must be
installed on a solid level roof curb.
6. Maintain level tolerance to 1/2 inch maximum across the
entire length or width of the unit.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any
packaging until the unit is near the place of installation. Rig
the unit by attaching chain or cable slings to the round lifting
holes provided in the base rails. Spreaders, whose length
exceeds the largest dimension across the unit, MUST BE
USED. Refer to Figure 2. Units may also be moved or lifted
with a forklift, from the side only, provided that an accessory
skid is used.
LENGTH OF FORKS MUST BE A MINIMUM OF 90”. Refer
to the Product Data Table 5 for unit weights.
CLEARANCES
All units require certain clearances for proper operation and
service. Installer must make provisions for adequate
ventilation air in accordance with applicable provisions of the
local building codes. Refer to Dimensions and Clearances.
Refer Figure 8 for the clearances required for servicing, and
proper unit operation.
DUCTWORK
A closed return duct system should be used. This should not
preclude use of outdoor fresh air intake.
The supply and return air duct connections at the unit should
be made with flexible joints to minimize noise. The supply
and return air duct systems should be designed for the CFM
and static requirements of the job. They should NOT be
sized to match the dimensions of the duct connections on the
unit.
Refer to Dimensions and Clearances Figure 7 for information
concerning supply and return air duct openings.
FIXED OUTDOOR AIR INTAKE DAMPER
This damper is shipped inside the return air compartment. It
is completely assembled and ready for installation. Refer to
the Fixed Outdoor Damper Figure 3.
Gasketing and mounting screws are provided in a parts bag.
Adjusting the damper to the desired air flow may be done
after installation by opening or closing dampers with handle.
Damper provides maximum of 25% fresh air when fully
opened.
FIGURE 2 : TYPICAL RIGGING
WARNING
BEFORE LIFTING A UNIT, MAKE SURE THAT ALL PANELS ARE
IN PLACE AND THAT ITS WEIGHT IS DISTRIBUTED EQUALLY
ON ALL CABLES SO IT WILL LIFT EVENLY.
WARNING
DO NOT PERMIT OVERHANGING STRUCTURES OR SHRUBS
TO OBSTRUCT OUTDOOR AIR DISCHARGE OUTLET.
WARNING
WHEN FASTENING DUCTWORK TO SIDE DUCT FLANGES ON
UNIT, INSERT SCREWS THROUGH DUCT FLANGES ONLY. DO
NOT INSERT SCREWS THROUGH CASING. OUTDOOR
DUCTWORK MUST BE INSULATED AND WATERPROOFED.
