Coleman 8330-752, Installation Instructions Manual

Page: 6 / 13

6
Four (4) wires are required (5 wires for
heat/cool boxes). These wires are as
follows:
(1) Blue wire for -12 VDC circuit
(1) Yellow wire for compressor circuit
(1) Green wire for high fan circuit
(1) Gray wire for low fan circuit
(1) White wire for heat circuit
3.
Airxcel, Inc. low voltage wiring specifications:
A. All low voltage wiring should be 18 gauge
minimum.
B. Low voltage wiring must be routed into the front
side of the ceiling plenum opening.
10. ROUTING THERMOSTAT WIRING (ZONE)
1. Following the instructions packed with the
thermostat, determine a location for thermostat
mounting.
2.
Following Airxcel, Inc. low voltage wiring
specifications and all local and national electrical
codes:
A. Route the thermostat control wiring from the
thermostat mounting location into the front
of the ceiling plenum opening.
These wires are as follows:
(1) Red wire to +12 VDC circuit (R+)
(1) Blue wire to -12 VDC circuit (B-)
(1) Purple wire to communication
signal (Sig 1)
(1) Black wire to communication
signal (Sig 2)
(1) Any color for auto generator start
(optional) (Gen)
(2) Any color for room temperature
sensor (zone 1 optional, required
for other zones)
(1) For each heating appliance
(Up to 4)
(2) Any color for cool load shed
(optional)
(2) Any color for heat load shed
(optional)
B. See Figure 5 for wiring requirements for
multiple zones.
3.
Airxcel, Inc. low voltage wiring specifications:
A. All low voltage wiring should be no
smaller than 18 gauge.
B. Low voltage wiring must be routed into
the front side of the ceiling plenum opening.
C. Low voltage wiring should not be routed
with high voltage wiring.
D. If low voltage and high voltage wires must
cross, they should do so at right angles from
one another.
11. ROUTING 115 VAC WIRING
Following Airxcel, Inc. high voltage wiring specifications and
all local and national electrical codes, route the roof top unit
115 VAC supply wiring from its power source to the wirebox.
High Voltage Wiring Specifications based on Minimum
Overcurrent Protection Device Amperage – (see upper
unit nameplate)
1. U.L. requires copper conductors only with minimum
#12 AWG when using the minimum recommended
overcurrent protection device. Higher rated devices
or longer wiring runs will require #10 AWG or
greater copper conductors.
2. To prevent voltage drops greater than 10% during
starting loads, adhere to the following guideline:
For lengths greater than 50’, use #10 AWG or larger
copper conductors. Match to the overcurrent
protection device provided.
Circuit Protection – Refer to upper unit nameplate
High Voltage Wiring Specifications based on Overcurrent
Protection Device rated higher than the minimum
required (see upper unit nameplate)