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Use wiring with a temperature limitation of 75'_C min.; run
the 208 or 230 volt, 60 hertz electric power supply through a
fused disconnect switch to control box of unit and connect
as shown in the wiring diagram located on the inside of the
control access panel,
Unit must be electrically grounded in accordance with local
codes or in the absence of local codes with the National
Electric Code, ANSI/NFPA No. 70 (latest edition) or CSA
C22.2 Part 1 (latest edition).
Power supply to the unit must be N.E,C, Class 1, and must
comply with all applicable
codes. A fused disconnect
switch should be field provided for the unit, The switch must
be separate from all other circuits,
If any of the wire
supplied with the unit must be replaced, replacement wire
must be of the type shown on the wiring diagram.
Electrical wiring must be sized to carry minimum circuit
ampacity
marked
on
the
unit.
USE
COPPER
CONDUCTORS
ONLY. Each unit must be wired with a
separate branch circuit and be properly fused.
CAUTION
See figure 9 for field connection of line voltage wiring, See
figure 7 for typical wiring diagram.
208/230
Line Voltage
Wiring
contactor
__
C[Z]3
fused
disconnect
switch
(furnished
by installer)
T
ground
L2
lug
NOTE - If 208 voltage is suppfied, transformer
connections
must be made.
Figure 9
Thermostat
The room thermostat should be located on an inside wall
where it will not be subject to drafts, sun exposure or heat
from
electrical
fixtures
or
appliances.
Follow
manufacturer's
instructions enclosed with thermostat for
general installation procedure, Color coded insulated wires
(# 18 AWG) should be used to connect thermostat to unit,
Four wires are required for cooling,
Heat Anticipator Setting
It is important that the anticipator setpoint be correct. Too
high of a setting will result in longer heat cycles and a
greater
temperature
swing
in the conditioned
space,
Reducing the value below the correct setpoint will give
shorter "ON" cycles and may result in the lowering of the
temperature
within
the
conditioned
space.
Heat
Anticipator Settings: 0.75 AMP
Cooling
System
The cooling section is a complete factory package utilizing
an air-cooled condenser. The system is factory-charged
with HCFC-22. The compressor
is hermetically
sealed,
internally sprung and base mounted with rubber-insolated
hold-down bolts,
Unit compressors
have internal protection. In the event
there is an abnormal rise in temperature of the compressor,
the protector will open and cause the compressor to stop,
After the initial installation, the compressor should be
given three false starts (energized just long enough to
make a few revolutions),
with 5-7 minutes between
each start, before being put into full time service.
Cooling Sequence of Operation
When the thermostat calls for cooling, "R" is closed to "G"
and "Y" (wiring schematic) which completes the low voltage
control circuit, energizing the compressor, condenser fan
motor and blower motor.
NOTE - At the start of the each cooling demand, the
combustion
air blower (draft motor) will operate for 10
seconds,
Blower Delays - Cooling
Blower is controlled by a timing relay delaying blower on 5
seconds
and blower
off 90 seconds.
This feature
is
intended to deter insect nesting,
System Performance
For maximum performance
of this cooling system, the
operating temperatures and pressure should be checked
and superheat determined at Standard ARI test conditions
of 82 '_F outdoor temperature minus ( - ) 80 ° F indoor dry
bulb / 67 <_F indoor wet bulb. If superheat
measured
deviates from values in table 4 below, refrigerant charge
should be adjusted accordingly for maximum performance.
Table 4
Suction
Superheat
Values
Suction Superheat
Unit Model No.
82"F OD minus 80"F IDDB
/ 67"F IDWB
10GCS-024
18 - 20"
10GCS-030,-036
17- 19 °
10GCS-042
18 - 20"
10GCS-048,-060
16- 18"
12GCS-024, -030
18 - 20"
12GCS-036, -042
13 - 15 °
12GCS-048, -060
14 - 16"
NOTE - With the proper thermostat and subbase, continu-
ous blower operation is possible by closing the R to G cir-
cuit. Cooling blower delay is also functional in this mode.
Verify system performance using table 5 as a general guide.
Table should not be used for charging unit. Minor variations
in these pressures may be expected due to differences in
installations. Significant differences could mean that the
system is not properly charged or that a problem exists with
some component in the system.
Page 11
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