GPC14H Installation Manual

6
On ductwork exposed to outside air conditions of
temperature and humidity, use an insulation with a good K
factor, and a vapor barrier. Industry practices should be
followed. Balancing dampers are recommended for each
branch duct in the supply system. Ductwork should be
properly supported from the unit.
NOTE: Proper sealing of all duct work and air handling
compartments is extremely important to overall unit
efficiency.
Filters
Filters are not provided with unit, and must be supplied and
installed in the return duct system by the installer. A field
installed filter grille is recommended for easy and convenient
access to the filters for periodic inspection and cleaning.
Filters must have adequate face area for the rated quantity
of the unit. See air delivery tables (Figure 4) for
recommended filter size.
PIPING
Condensate Drain
The condensate drain connection of the evaporator is a half
coupling of ¾” N.P.T. A trap must be provided to have Proper
condensate drainage.
2" Minimum
3" Minimum
A Positive Liquid Seal
Is Required
Flexible
Tubing-Hose
Or Pipe
Drain
Connection
Unit
FIGURE 5
Install condensate drain trap as shown. Use ¾ “ drain
connection size or larger. Do not operate without trap. Unit
must be level or slightly inclined toward drain.
WIRING
All wiring should be made in accordance with the
National Electrical Code. The local Power Company
should be consulted to determine the availability of sufficient
power to operate the unit. The voltage, frequency, and phase
at the power supply should be checked to make sure it
corresponds to the unit’s RATED VOLTAGE
REQUIREMENT.
Install a branch circuit fused disconnect near the unit, in
accordance with the N.E.C. or local codes. Wire sizes and
overcurrent protection should be determined from the unit
nameplate ampacity and in accordance with Table 4 (page
7) or the N.E.C. Under no circumstances should wiring be
sized smaller than is recommended by either of these two
sources.
Fuses smaller than that recommended on the wiring diagrams
could result in unnecessary fuse failure or service calls.
The use of protective devices of larger size than indicated
could result in extensive damage to the equipment. The
manufacturer bears no responsibility for damage caused to
equipment as result of the use of larger than is recommended
size protective devices.
All units have undergone a run test prior to packaging for
shipment. This equipment has been started at minimum rated
voltage and checked for satisfactory operation. Do not
attempt to operate this unit if the voltage is not within the
minimum and maximum voltages shown on nameplate.
All exterior wiring must be within approved weatherproof
conduit. The unit must be permanently grounded in
accordance with local codes, or in absence of local codes,
with N.E.C ANSI/ NFPA NO. 70-1984 or latest edition by
using ground lug in the control box.
Fuses or HACR type circuit breakers may be used where
codes permit.
CONTACTOR
R
W
G
G
RW
FOR INTERNAL WIRING SEE WIRING LABEL ATTACHED TO UNIT
24 VOLT CONTROL WIRING
FIGURE 6
Note: Some single phase units are equipped with a single
pole contactor. Caution must be exercised when servicing
as only one leg of the power supply is broken with the
contactor.
To wire the unit, make the following high and low voltage
connections.
WARNING
HIGH VOLTAGE
!
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR INSTALLING
THIS UNIT.
M
ULTIPLE POWER SOURCES MAY BE PRESENT. FAILU
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY O
DEATH.
RE
R
High Voltage Wiring: (See Figure 6)
Single Phase- Two leads should be connected to terminals L1
& L2 in the electrical control section, using wire sizes specified
in wiring table.
Low Voltage Wiring: (See Figure 6)
a. Air Conditioners- Connect 24V wires from the thermostat to
the corresponding wires in the control box using No. 18AWG
as follows:
LEAD THERMOSTAT
Red R (24V)
Green G (Fan)
Yellow Y (Cool)
White W1 (Heat)*
Brown W2 (Heat)*
TABLE 2