3-37

3.10 Simplified Wiring Diagrams

K2 HEAT
RELAY
K4
BLOWER
RELAY
AIR
OPTIONAL
AIR SWITCH
BLOWER
HI-LIMIT
12V 24V TEMP
PROBE
24V
LED 3 LED 5
R-GV
R HEAT
LED 4
R
PWR
V1S
ALARM
LED 6
12V
L HEAT
LED 2
L
PWR
ALARM
V2S
POWER
ON/OFF
TROUBLE
HEAT
T
J3
621291185431
J2
11
11
4
4
13
13
14
14
10
10
5
5
3
3
1
1
2
2
GV
RIGHT IGNITION
MODULE
25V+
ALARM
TD
VALVE
GND
BNR
GND
RIGHT
IGNITOR
LEFT IGNITION
MODULE
25V+
ALARM
TD
VALVE
GND
LEFT
IGNITOR
SD
M
LINE VOLTAGE
GND
BNR
DRAIN SAFETY
SWITCH
H52 SERIES — FULL-VAT — JUNE 1996 - JULY 1999

(TWO RELAYS: K2 (HEAT) & K4 (BLOWER) AND TWO IGNITION MODULES)

HV
HV
1/50
A
47K
1K
DRAIN SAFETY SWITCH
ONLY ON BIH52 MODELS
AIR SWITCH
ONLY ON CE AND
SOME EXPORT UNITS
HOODRELAY
FUSE