Low Voltage Wiring - Nordyne TA-060C-08A Installation Instructions Manual

Low Voltage Wiring

Staging Configurations
These furnaces are factory configured to oper-
ate on high fire only, but can be field converted
to operate as two-stage furnaces.
NOTE: T achieve full rated capacity and
O
efficiency, the furnace should be operated in the
factory configuration (high fire only as de-
scribed in part 2.)
1. Two stage thermostat configuration – For this
installation a two stage heating thermostat is
used. CAUTION: Disconnect yellow wire with
black stripe from low firing of gas valve. Remove
female connector from yellow/black wire and
strip insulation from end. Connect stripped
yellow wire with black stripe to (W2) from the
thermostat. (See Figure 28). The first stage
bulb (W1) is connected to W on the furnace
control board. On a call for first stage heat, the
furnace will operate at low fire and the blower will
run at a lower speed. On a call for second stage
heat, the furnace will operate at high fire and the
blower will run at a higher speed. The furnace
will stage between low fire, high fire, and off
depending on the thermostat signal.
Legend
Field Wiring
Factory Wiring:
Low Voltage
High Voltage
28
2. High fire only configuration – As shipped from
3. Low fire only configuration – For this installation,
4. Outdoor ambient dependent configuration –
TWO STAGE ROOM
THERMOSTAT
R
Y
G
W
W2
C
AIR CONDITIONER
Y
CONDENSING UNIT
CLOSED END CONNECTOR
DO NOT REMOVE
YELLOW/BLACK
BROWN
LO C
HI
RED - LOW FIRE
2 4
BLUE - HIGH FIRE
YELLOW
N.O
5 6
N.C
1 3
BROWN BROWN
24V
DPST
RELAY
Figure 28. Two Stage Configuration
the factory, the low and high terminals on the gas
valve. are connected in parallel (See Figure 29).
This defeats the staging feature and the furnace
operates on high fire only. All of the burners will
operate on a call for heat and the variable speed
blower will operate at a higher speed.
the high terminal is disconnected (See Figure
30). This defeats the staging feature and the
furnace operates on low fire only. The furnace
will run at reduced firing rate and the variable
speed blower will operate at a lower speed.
For this installation, the high and low terminals
are connected in parallel with an outdoor ther-
mostat (open on rise style) in series with the high
terminal (See Figure 31). CAUTION: DO NOT
CONNECT W2 from outdoor thermostat to the
furnace wiring when using the outdoor ambient
dependent configuration. When the outdoor
temperature is above the set point, the outdoor
thermostat opens keeping the high terminal
closed. The furnace operates in the low fire
mode at a lower blower speed. When the
YELLOW
BROWN
INTEGRATED
CONTROL BOARD
THESE WIRES ARE NOT
PRESENT ON ALL MODELS
YELLOW
1 1
2 2
3 3
BLACK
4 4
5 5
6 6
9 6 3
8 5 2
7 4 1
3 OR 4 SPEED
MOTOR
C
H
MH
ML
L
RED
ORANGE
BLUE
BLACK
WHITE