24
GALAXY
PRESURE CUT-OUT
: CONTACTS SHOWN WHEN BOILER
WATER IS AT NORMAL LEVEL.
IF THE WIRES MARKED( ) MUST BE REPLACED,THEY MUST BE
REPLACED WITH POWER LIMITED FIRE PROTECTIVE CABLE.
BLOCKED VENT
SAFETY
SWITCH
P
RED
RED
ROLL-OUT
SWITCH
2
2
EMERGENCY
SWITCH
MV
PV
PV
MV
NEUTRAL
WHITE
MM-67 L.W.C.0.
THERMOSTAT
BLK
BLK
S8600
OR S8670
PILOT
LIGHTER
PRESURE CUT-OUT
LOW
LIMIT
BLK
S8600 OR S8670
24V
120V
SLANT/FIN
VENT DAMPER
TERMINALS MARKING SHOWN
ARE FOR BOILER HARNESS
MALE PLUG.
VIOLET
THERMOSTAT
24V
LOW LIMIT
(IF USED)
P
P
P
P
P
2
4
3
1
MAIN
VALVE
COIL
PILOT
VALVE
COIL
MV
PV
MV/PV
L1
L2
24V(GND)
SPARK
BLACK
4
MM-67
L.W.C.0.
H
N
WHITE NEUTRAL
HOT BLK.
1
4
3
2
1
ROLL-OUT AND BLOCKED
VENT SAFETY SWITCHES
PILOT GAS
GND
GAS VALVE
(GND)
24V
24V
GAS VALVE
MALE PLUG
24V
ELECTRIC
IGNITION
PILOT
24V
120V
Y
E
L
L
O
W
B
L
U
E
R
E
D
1
2
3
4
3
1
2
EMERGENCY
SWITCH
MV
PV
MV
PV
GND
IGNITION
CABLE
250
∞
C
RED
WHITE
GREEN
GND
GND
(BURNER)
MV
PV
MV/PV
1
HOT
BLK
V
IO
L
E
T
RECEPTACLE B(CONNECTS TO
MALE PLUG ON ADAPTER
HARNESS)
OPTIONAL VENT DAMPER
41-1667U
FLEX METALLIC CONDUIT
FOR FIELD-WIRED CONNECTIONS, USE WIRING
MATERIAL RATED FOR AT LEAST 75˚C.
2
1
PROVIDE DISCONNECT MEANS & OVERLOAD PROTECTION
AS REQUIRED.
FOR PROPANE USE S8600M OR S8670E ONLY, FOR NATURAL GAS S8600F,
S8600M OR S8670E.
BLOCKED VENT SAFETY SWITCH MUST BE MOUNTED TO DRAFT HOOD BEFORE
OPERATING THE BOILER (SEE INSTRUCTION MANUAL GG-40).
2
1
4
GALAXY
VENT DAMPER
HARNESS SUPPLIED
WITH VENT DAMPER
RECEPTACLE A
B
L
K
/Y
E
L
W
H
T
/Y
E
L
B
L
A
C
K
W
H
IT
E
BOILERS WITH INPUT OF 300,000 BTU/HR OR GREATER
BEFORE INSTALLING OPTIONAL VENT DAMPER , READ WARNING
LABEL ON THIS BOILER AND VENT DAMPER. READ SLANT/FIN VENT
DAMPER INSTALLATION INSTRUCTIONS.
RED
4
3
2
1
3
SLANT/FIN VENT
DAMPER
IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE
APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH
TYPE 105˚ C OR ITS EQUIVALENT.
WARNING:
PLUG
RECEPTACLE
WIRE ENTRANCE
ENDS POLARIZED
CONNECTORS
2
3
2
1
3
4
1
4
WIRE LEGEND
FACTORY WIRED
FIELD CONNECTED
FACTORY SUPPLIED
FIELD CONNECTED
FIELD SUPPLIED
1
2
3
4
STEAM (PZ,PZT AND PPZT) BOILER WITH 24V HONEYWELL
INTERMITTENT IGNITION, OPTIONAL VENT DAMPER AND
MM-67 L.W.C.O. ( LO LIMIT IF W/ TANKLESS )
WIRING DIAGRAMS FOR STEAM BOILERS
WITH INPUT OF 300,000 BTU/HR OR GREATER MODELS
WITH IID (INTERMITTENT IGNITION SYSTEM) AND
OPTIONAL VENT DAMPER
WIRING DIAGRAMS FOR HOT WATER BOILERS
WITH INPUT OF 300,000 BTU/HR OR GREATER
MODELS WITH IID (INTERMITTENT IGNITION SYSTEM)
AND OPTIONAL VENT DAMPER
CAUTION: Label all wires prior to disconnection when servicing control.
Wiring errors can cause improper and dangerous operation. “Verify proper operation after servicing.”
