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462 01 2103 01
Special Procedures For 208 Volt Operation
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or
death.
Before installing or servicing system, always turn off main
power to system. with disconnect switch open, move black wire
from transformer (3/16” [4.8mm]) terminal marked 230 to
terminal marked 208. This re
−
taps transformer to primary
voltage of 208 VAC.
!
WARNING
ELECTRICAL SHOCK FIRE/EXPLOSION HAZARD
Failure to follow this warning could result in personal injury or
death.
Before making any wiring changes,
make sure
the gas supply
is switched off first.
Then
switch off the power supply to the unit
and install lockout tag.
!
WARNING
Control Voltage Connections
Do not use any type of power
−
stealing thermostat. Unit control
problems may result.
Use no. 18 American Wire Gage (AWG) color
−
coded, insulated
(35
C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than 100 feet from the unit (as measured along the control
voltage wires), use no. 16 AWG color
−
coded, insulated (35
C
minimum) wires.
Standard Connection
FIGURE 10
High and Control Voltage Connections
FIELD
−
SUPPLIED
FUSED DISCONNECT
POWER
SUPPLY
EQUIP GR
HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)
CONTROL BOX
W2
Y1
Y2
G
R
C
Y1
Y2
G
R
C
(
)
(
)
( )
( )
( )
( )
WHT
YEL
PNK
GRN
RED
BRN
SPLICE BOX
LOW
−
VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)
Thermostat
W1
Run the low
−
voltage leads from the thermostat, through the inlet
hole, and into unit low
−
voltage splice box.
Locate six 18
−
gage wires leaving control box. These low
−
voltage
connection leads can be identified by the colors red, green, yellow,
brown, pink, and white (see Figure 10). Ensure the leads are long
enough to be routed into the low
−
voltage splice box (located below
right side of control box). Route leads through hole in bottom of
control box and make low
−
voltage connections (see Figure 10).
Secure all cut wires so that they do not interfere with operation of
unit.
Heat Anticipator Setting
The room thermostat heat anticipator must be properly adjusted to
ensure proper heating performance. Set the heat anticipator, using
an ammeter between the W and R terminals to determine the exact
required setting.
NOTE
: For thermostat selection purposes, use 0.18 amp for the
approximate anticipator setting. Failure to make a proper heat
anticipator adjustment will result in improper operation, discomfort
to the occupants of the conditioned space, and inefficient energy
utilization; however, the required setting may be changed slightly
to provide a greater degree of comfort for a particular installation.
Transformer Protection
The transformer is of the energy
−
limiting type, however a direct
short will likely blow a secondary fuse. If an overload or short is
present, correct overload condition and check for blown fuse on
Indoor Fan board or Integrated Gas Controller. Replace fuse as
required with correct size and rating.
