14
English
8.5
WIRING TRANSFORMER AND PCB
IMPORTANT:
When wiring PCB power supply to PCB trans-
former, an insulated bushing (field supplied) must be installed in
the furnace cabinet wall. Wiring must pass through bushing to
interior of cabinet.
DO NOT ALLOW WIRING TO PASS ALONG
AREAS WHERE WIRING IS EXPOSED TO ABRASIVE METAL
EDGES. DO NOT ALTER BLOWER DECK.
To power PCB transformer: Use high voltage red and black
wires provided in transformer kit. Route red/black transformer
power supply to PCB transformer from field wiring.
DO NOT
POWER BOARD WITH FACTORY INSTALLED FURNACE
R/C THERMOSTAT POWER.
•
Create wire trap on outside of cabinet wall before passing
into cabinet. The wire trap must remain below the insulated
wire bushing location to prevent moisture intrusion into fur-
nace cabinet and onto electrical components.
•
Outside the cased coil, do not route the remote controller
wiring and transmission wiring together with other electrical
wiring. Keep the remote controller wiring and transmission
wiring at least 2 in. (50mm) away from the power wiring and
other electrical wiring. Effects of electrical interference (ex-
ternal noise) may result in malfunction and breakdown.
•
Use only specified wire and connect to terminals tightly. Be
careful that wires do not place external stress on terminals.
Keep wire in neat order; not to obstruct other equipment.
Make sure that the control panel cover is closed tightly. In-
complete connections could result in overheating, and in
worse cases, electric shock or fire.
•
Never connect power supply wiring to the terminal block for
remote controller wiring as this could damage the entire sys-
tem.
•
When doing the wiring, make sure the wiring is neat and
does not cause the control panel to stick up, and then close
the cover firmly. When attaching the control cover, make
sure you do not pinch any wires.
PRECAUTIONS
•
Refer to the “REMOTE CONTROLLER INSTALLATION
MANUAL” on how to install and lay the wiring for the remote
controller.
•
See also the “Wiring Diagram Label” located on the under-
side of the control panel cover.
•
Connect the remote controller and transmission wiring to their
respective terminal blocks.
WIRING EXAMPLE
Furnace
Most
Downstream
Indoor unit
Indoor unit B
Indoor unit A
(CXTQ)
Power supply
single phase
60Hz 208/230V
Power supply
single phase
60Hz 208/230V
Remote
Controller
(Option)
Remote
Controller
(Option)
Remote
Controller
(Option)
Gas Furnace
NO. 1 SYSTEM:
When using 1 remote controller for 1 indoor unit.
Figure 17
