Series
LTA/LTX/LTXR
Page
34 Nov./21/12
Electrical Wiring
General Requirements
Heaters are normally controlled by line voltage or low voltage (24V) thermostats. Line voltage
thermostats are wired directly while low voltage thermostats use a relay. In all cases, heaters must be
grounded in accordance with the
National Electric Code,
ANSI/NFPA 70 in the US, and the
Canadian
Electric Code,
CSA C22.1 in Canada, and must comply with all local requirements. Heaters may also be
controlled with a manual line switch or timer switch in place of the thermostat. Refer to Figure 33 for
guidance on electrical wiring of heaters.
If any of the original wire as supplied with the heater must be replaced, it must be replaced with wiring
having a rating of at least 105°C temperature service and 600 volts capability.
Figure 33: Wiring Diagram
Low Fire
Lamp
AIR
SWITCH
Black
Purple
V2
HV
S1
GND
Pink
Green
TH
Orange
Black
L1
24V
IND
V1
PSW
BLOWER
Red
Brown
Yellow
Yellow
IGNITER
SENSOR
BURNER
MOUNTED EXTERNALLY
WHITE ROGERS 1F37-408
Yellow
High Fire Lamp
Blue
Red
24V
TRANSFORMER
NEUTRAL
L1
Blue
Brown
Purple
W1
STAT
R
W2
120V
THERMOSTAT IS
Yellow
CC
MH
I
GAS
VALVE
