Hydronic Heating Boilers and Domestic Water Heaters Installation and Service Manual

51
WIRING DIAGRAM - CONTROL BOX CONNECTIONS
MODELS 985,000 - 2,065,000 BTU/HR
FLAME FAIL
ENABLE RELAY
24V
OPTIONAL
ALARM
ENABLE RELAY
24V
BK
W
S2/FS
F2
F1
S1
NEU
4 2 3
-
+
-
+
IGNITION
MODULE
TH
10
PI
9
8
24COM
RESET
7
24VAC
6
MV
5
PS
4
M/S
FF
1
LINE
STG #1
Y
PR
Y
P
BL
PR/
BK
YP
1
23
PR/
BK
OPTIONAL
PR Y BL
5 4 3
2
1
5
4
3
2
1
RUNTIME
MONITORING RELAY
24V
1
2
3 4
TO
LWCO
1
2
4 5
7 8
9
10 11
12
13
15
1
2 3
4
5
6
7
9
LBL20015 REV A
5
1
CONTROL BOX CONNECTIONS
Y
GGY
O
P
Y
BL
R
T/W
PR/BK
GY
BK
W
RYR/BK BKR
BK G W
BK/
W
1 2 3 4
R
R
1
2
3
A
B
E
D
CHASSIS
GROUND
24V
COMMON
AC POWER
CONNECTOR
WIRING BOX
CONNECTOR
MAIN UNIT
CONNECTOR
IGNITER
CONNECTOR
24 V
NEUTRAL
GROUND
GY
P P
GY
R
3 1
6 5
4
9
7
BK
14
CONNECTION DIAGRAM A
3
6
8
O
OPERATOR
INLET
PROBE
SYS/
TANK
CN1
CN2
CN3 CN4 CN5
CN6
CN7
CN8
CN9
BR
BR
1
2
3 4
1 2
PR
PR
2-STAGE THERMOSTAT
SHUTDOWN
O.A. MAX. RATIO
O.A.
DISABLE
SHUTDOWN
ON
SENSOR
ENABLE
CN7
OPTIONAL
I/O RESET
T
O
BR
BR
BR
R
R/BK
SENSOR
CONNECTOR
PR/BK
PR/BK
BK/W
GY GY
P
R/BK
BK
PR/BK
Y
W
BL/ W
BL
IGN1
IGN1
P1
S2
S2+
S2-
+24
COM
ALR RST1
S1
BK
W
GY
GY
PUMP
BK
CIRCUIT
BREAKER
FLAME
FAIL
RESET #2
FULL-FIRE/
BLOWER RELAY
SOCKET TOP VIEW
W
BL
24VAC XFMR.
120V
24V
G
BL
Y
Y
C
BL
Y
3
2
14
6
BR BR
PR
PR
PR/BK PR/BK
O/B
T
Y
BR
T/W
4
5
BL/
BK
W
O
BL/
BK
6 9 12 10 7
3 11 1
T
14
13
15
2
BR
BL
O
R/
BK
R/
BK
ELECTRONIC
CONTROLLER
3 1 98
2
4 76
DISPLAY
BOARD
LINE
CONNECTED UNLESS
ALARM ADDED
PR/BK
PR/BK
F
-24 V CO M
PR Y
BR
P
P
Y
R
BK/W
R
OPTIONA L
RUNTIME
CONTACTS
5
4 1
2
3 6
TH
OPTIONAL
I/O RESET BOARD
BOILER ONLY
5
BK/W BK
R
R/BK
R/BK
BL/W
BL
BL
BL
R/BK
Y
R
C NO C NO
NC
BL/W
BL/W
321
8
PR
PR
8
Y
P
P
NOT USED
NOT
USED
PR
SHRINK
TUBING
SHRIN
K
TUBIN
G
1
2
3
4
5
6
7
8
9
10 11
12
W2
W1
W3
TO
LWCO
3
1
6 5 4 9 7
F
BL
BL/
BK
Y
7
4
6
5
O
CHASSIS GROUND
PR
J3
54
6
1
2 3
O.C.
J
1
J2
3
2 1
J4
P
GND
RESET
O
PR
PR
Y
Y
9
BL
BL/
BK
BL
RESET
PR
PR
T
T
TO TEST SWITCH
T
24 VAC
LWCO