Technical data

40 Installation, Operation, And Service Instructions
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
N
H
Oil Pump
WHT
BLK
WHT
YEL
Service Switch
Fused Disconnect Switch
H
N
GND
(Items Supplied By Installer)
120 VAC
TT
Circulator
Thermostat
TT
21
3
4
5
6
Honeywell
R845A
Low
Water
Cutoff
High
Limit
L4006E
High
Limit
L4008A
Set Temp 20
Deg Higher
Than L4008A
(Supplied by Installer)
(Supplied by Installer)
(Supplied by Installer)
RED
Figure 34. WIRING DIAGRAM, SINGLE HEATING ZONE ONLY, OWB-350 AND OWB-500