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General Information
These instructions cover installation, operation, and mainte-
nance of all single package
WCK
air conditioning units. For an
easy and orderly installation, follow the sequence of instructions
as they are outlined. Improper installation can result in unsat-
isfactory operation and/or dangerous conditions as well as make
the related warranty inapplicable. Read this manual carefully
before installing, operating, or performing maintenance on this
unit. Installation and maintenance should be performed by
qualified service technicians. Locate the unit in accordance with
local codes or the National Electrical Code. Each unit contained
an operating charge of HCFC-22 when shipped.
Unit Inspection
The material in this shipment has been inspected at the factory
and was released to the transportation agency without known
damage. Inspect the exterior of the carton for evidence of rough
handling in shipment. Check the unit nameplate to determine if
the unit is correct for the intended application. After moving the
equipment to the approximate location, unpack it carefully. If
damage to the unit is found, report the nature of this damage
immediately to the delivery agency. Check to be sure that the
refrigerant charge has been retained during shipment.
Power Supply
The power supply must be adequate for the unit and any
supplementary electric heaters, if added. Make certain that the
power supply to the unit agrees with the power requirements
specified on the unit nameplate. Separate branch circuits are
required for supplementary electric heaters.
Rigging
IMPORTANT:
Check the handling facilities to ensure the safety
of both personnel and the unit. Be sure that the proper method
of rigging is used, with straps or slings and spreader bars for
protection during lifting.
These units are designed for outdoor installation. For proper
installation, the following recommendations must be considered.
NOTE: Unit is for horizontal installation only.
The discharge air from the condenser fans must be unrestricted
for a minimum of 3 feet above the unit.
NOTE: If any internal accessories are to be added to the
unit it should be done at the shop if at all practical.
2. Unit should be positioned so Roof-Run-Off water does not pour
directly on unit.
4. Exhaust vents or other sources of contaminated air should not
be near unit air inlet if outside air is to be introduced as a
make-up air.
5. Check the handling facilities to insure the safety of personnel
and the unit(s).
6. CAUTION MUST BE TAKEN AT ALL TIMES TO AVOID
PERSONAL INJURIES AND/OR DAMAGE TO EQUIP-
MENT.
7. The unit must be mounted level for proper drainage of defrost
water through the holes in the base pan.
8. Flexible duct connectors must be of a flame retardant mate-
rial. All duct work outside of the structure must be insulated
and weatherproofed in accordance with local codes.
10. Holes through exterior walls must be sealed in accordance
with local codes.
11. Access and service clearances for the unit must be given
careful consideration when locating the duct entrance open-
ings. Figure 1 provides unit dimensions.
12. All fabricated outdoor ducts should be as short as possible.
13. Be sure the hole in the structure for the ducts is large enough
to accommodate the fabricated ducts and the insulation
surrounding them. (See Figure 1.)
Clearances
1. The recommended clearances for single-unit installations are
illustrated in Figure 1. These minimum requirements are not
only an important consideration when determining unit
placement, but they are also essential to ensure adequate
serviceability, maximum capacity, and peak operating effi-
ciency.
2. Any reduction of the unit clearances indicated in this illustra-
tion may result in condenser coil starvation, or the recircula-
tion of warm condenser air. Actual clearances which appear
to be inadequate should be reviewed with a local sales
engineer.
Unit Support
If unit is to be roof mounted, check building codes for weight
distribution requirements. Check unit nameplate for supply
voltage required. Determine if adequate electrical power is
available. Refer to specification sheet.
Location and Clearances
Installation of the unit should conform to local building codes or,
in the absence of local codes, to the ANSI/NFPA No. 70-1987
National Electrical Code or “Latest Revision.” Canadian installa-
tions must conform to CSA and local codes.
Select a location that will permit unobstructed airflow into the
condenser coil and away from the fan discharge and permit
unobstructed service access into the compressor compartment.
Suggested airflow clearances and service clearances are given in
Figure 1.
▲
WARNING
!
Do not lift the unit without testing for balance and rig-
ging. Do not lift the unit in windy conditions or above
personnel. Do not lift the unit by attaching a clevis, hooks,
pins, or bolts to the unit casing, casing hardware, corner
lugs, angles, tabs, or flanges. Failure to observe this
warning may result in equipment damage.
Locations and Recommendations
