Technical data

Installation, Operation, And Service Instructions 39
WHT
BLU
WHT
RED
BLK
ORN
OIL
PREHEATER BLOCK
CONTROLLER
WHT
RED
HTR
PRI
L2
L1
BLOWER MOTOR
WHT
HIGH
VOLTAGE
TRANS-
FORMER
BLK
PHOTO EYE
FLAME SENSOR
OIL PRIMARY CONTROL
(IE, Honeywell, etc.)
BLK
ORN
WHT
THERMOSTAT
CONNECTION
500W
HEAT
ROD
Bi
METAL
HIGH
LIMIT
SWITCH
THERMO-
COUPLE
OIL
PREHEATER
BLOCK
Fuse
Power Switch
BLK
BLK
WHT WHT
RED
WHT
WHT
WHT
RED
BLU
RED
Power Plug
(Looking at Terminal Side)
BLK
Oil Valve
BLK
GRN
Power Socket
Electrical Box
(Looking at Socket Side)
Burner Assembly
Thermostat
Circulator
Honeywell
L8148A Aquastat
T T L1 L2
3
B1 B2C2C1
Jumper
N
H
Oil Pump
WHT
BLK
WHT
BLK
Service Switch
Fused Disconnect Switch
H
N
GND
(Items Supplied By Installer)
120 VAC
(Supplied By Installer)
Low
Water
Cutoff
Manual
High
Limit
L4006E
RED
WHT
Figure 33. WIRING DIAGRAM, SINGLE HEATING ZONE ONLY, OWB-90, OWB-150, OWB-
350