Product data

Page 7
Installation, Operation & Maintenance Manual # 036-1009(0608)
COMPRESSORS
Units are shipped with factory adjusted compressor mountings
and ready for operation.
FILTERS
Two inch filters can be supplied with each unit. Filters must
always be installed ahead of the evaporator coil and must be
kept clean or replaced with same size and type. Dirty filters will
reduce the capacity of the unit and will result in frosted coils
or safety shutdown. Minimum filter area and required sizes are
shown in Product Data Table 4.
SERVICE ACCESS
The following removable panels provide access to all serviceable
components :
Compressor compartment •
Electric Heat compartment •
Blower compartment •
Main control box •
Filter compartment •
Refer to the Dimensions and Clearances Figure 7 & 8 for location
of these access panels.
THERMOSTAT
The room thermostat should be located on an inside wall
approximately 56 inches above the floor where it will not be
subject to drafts, sun exposure or heat from electrical fixtures
or appliances. Follow manufacturers instructions enclosed with
thermostat for general installation procedure. A minimum of
seven color coded insulated wires (#18 AWG) should be used to
connect thermostat to unit.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the
National Electrical Code and/or local ordinances. The unit must
be electrically grounded in accordance with NEC and/or local
codes.
Voltage tolerances, which must be maintained at the compressor
terminals, during starting and running conditions, are indicated
on the unit Rating Plate and the Unit Application Data table.
A fused disconnect switch should be field provided based on the
tabulated rating, with a short circuit capacity of 10K or more,
for the unit. The switch must be separate from all other circuits.
Wire entry at knockout openings require conduit fittings to
comply with local codes. Refer to the Dimensions and Clearances
Figures 7 & 8 for installation location.
If any of the wire supplied with the unit must be replaced,
replacement wire must be of the type shown on the wiring
diagram and the same minimum gauge as the replaced wire.
Electrical line must be sized properly to carry the load. Use
copper conductors only. Each unit must be wired with a separate
branch circuit fed directly from the meter panel and properly
fused.
Emergency stop button should be field installed as per wiring
diagram. The activator should be red in colour with a yellow
outline background, and should be easily accessible. The device
should be self latching type and contacts must be of positive
opening operation, certified to EN60947 - 5 - 1.
Refer to Typical Wiring Diagram, Figure 6 and to the appropriate
unit wiring diagram for control circuit and power wiring
information.
OPTIONAL ELECTRIC HEAT
The factory installed heaters are wired for single point power
supply. Power supply need only be brought into the single point
terminal block and thermostat wiring to the low voltage terminal
strip located in the upper portion of the unit control box.
These heaters are located within the supply air chamber. Refer
to Figuress 7 & 8 for access panel location. Fuses are supplied by
the factory. Refer to Table 3 for minimum CFM limitations and to
Table 5 for electrical data.
CAUTION
DO NOT LOOSEN COMPRESSOR MOUNTING BOLTS. REMOVE
COMPRESSOR SHIPPING BRACKETS BEFORE START-UP.
CAUTION
WHEN CONNECTING ELECTRICAL POWER AND CONTROL
WIRING TO THE UNIT, WATERPROOF TYPE CONNECTORS MUST
BE USED SO THAT WATER OR MOISTURE CANNOT BE DRAWN
INTO THE UNIT DURING NORMAL OPERATION. THE ABOVE
WATERPROOFING CONDITIONS WILL ALSO APPLY WHEN
INSTALLING A FIELD SUPPLIED DISCONNECT SWITCH.
Table 2: Control Wire Sizes
Table 3: Minimum CFM Limitation