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CIRCUIT BOARD JUMPERS
CIRCUIT BOARD JUMPERS
MCB-II – JP1 (not used), JP2 (used – 2.7A igniter),
MCB-II – JP1 (not used), JP2 (used – 2.7A igniter),
JP3 & JP4 (used – removed for hipot test).
JP3 & JP4 (used – removed for hipot test).
PDB – JP1 (used – run selection, JP2 & JP3 (used –
PDB – JP1 (used – run selection, JP2 & JP3 (used –
removed for hipot test).
removed for hipot test).
MCB-II DETAIL A
MCB-II DETAIL A
DIP SWITCH (SW1) FUNCTIONS
DIP SWITCH (SW1) FUNCTIONS
* 'ON' IS P OS IT ION T OWAR DS B OAR D'S E DG E .
* 'ON' IS P OS IT ION T OWAR DS B OAR D'S E DG E .
1 – Boiler type ('ON' V B , 'OF F ' V W).
1 – Boiler type ('ON' V B , 'OF F ' V W).
2 – Ignition trials ('ON' 3, 'off' 1).
2 – Ignition trials ('ON' 3, 'off' 1).
3 – Mus t be 'OF F ', IRI gas valve not an option.
3 – Mus t be 'OF F ', IRI gas valve not an option.
4 – Control probe ('ON' tank, 'OF F ' inlet).
4 – Control probe ('ON' tank, 'OF F ' inlet).
5 – Power accessory ('ON' if us ed).
5 – Power accessory ('ON' if us ed).
6 – Low water cutoff ('ON' if us ed).
6 – Low water cutoff ('ON' if us ed).
7 – Mus t be 'ON', low gas switch always used.
7 – Mus t be 'ON', low gas switch always used.
8 – Spare (n/a).
8 – Spare (n/a).
9 – Spare (n/a).
9 – Spare (n/a).
10 – Spare (n/a).
10 – Spare (n/a).
ON/OFF MAIN POWER SWITCH
ON/OFF MAIN POWER SWITCH
BK
Part of J-BOX
Part of J-BOX
BK
INPUT
INPUT
120VAC
120VAC
W
POWER
POWER
G
(OUTSIDE CABINET)
(OUTSIDE CABINET)
(OUTSIDE CABINET)
(OUTSIDE CABINET)
BUILDING
BUILDING
BUILDING
BUILDING
J3
J3
J3
J3
0-10VDC
0-10VDC
0-10VDC
0-10VDC
MANAGEMENT
MANAGEMENT
MANAGEMENT
MANAGEMENT
1
1
1
1
INPUT
INPUT
INPUT
INPUT
2
2
2
2
INTERFACE (BMI)
INTERFACE (BMI)
INTERFACE (BMI)
INTERFACE (BMI)
SIGNAL
SIGNAL
SIGNAL
SIGNAL
DS1 GREEN LED (ON WHEN
DS1 GREEN LED (ON WHEN
DS1 GREEN LED (ON WHEN
DS1 GREEN LED (ON WHEN
BOILER FOUND)
BOILER FOUND)
BOILER FOUND)
BOILER FOUND)
DS2 BMI MICRO GREEN LED
DS2 BMI MICRO GREEN LED
DS2 BMI MICRO GREEN LED
DS2 BMI MICRO GREEN LED
(2 HERTZ FLASH NORMAL)
(2 HERTZ FLASH NORMAL)
(2 HERTZ FLASH NORMAL)
(2 HERTZ FLASH NORMAL)
REMOTE PROBE
REMOTE PROBE
Y
Y
Y
Y
EXT ENABLE/DISABLE
EXT ENABLE/DISABLE
EXT ENABLE/DISABLE
EXT ENABLE/DISABLE
COM
COM
COM
COM
NO
NO
NO
NO
FLOW SWITCH
FLOW SWITCH
(OUTSIDE CABINET)
(OUTSIDE CABINET)
COM
COM
BK/W
BK/W
NO
NO
R/G
R/G
MCB-II DETAIL B
MCB-II DETAIL B
DIP SWITCH (SW2) FUNCTIONS
DIP SWITCH (SW2) FUNCTIONS
* 'ON' IS P OS IT ION AWAY F R OM B OAR D'S E DG E .
* 'ON' IS P OS IT ION AWAY F R OM B OAR D'S E DG E .
1 – Spare (not used).
1 – Spare (not used).
2 – High gas switch ('ON' if us ed).
2 – High gas switch ('ON' if us ed).
3 – Spare (not used).
3 – Spare (not used).
BK
BK
BK
BK
BK
COM
COM
BK
BK
W
NO
NO
G
W
W
ON/OFF
ON/OFF
POWER RELAY
POWER RELAY
THRU CABINET
THRU CABINET
CAT-5 CABLE
CAT-5 CABLE
CAT-5 CABLE
CAT-5 CABLE
J8
J8
J8
J8
J9
J9
J9
J9
1
1
1
1
2
2
2
2
3
3
3
3
Part of J-BOX
Part of J-BOX
VB/VW 1500/2000 W
VB/VW 1500/2000
POWER DISTRIBUTION
PUMP FUSE
TB1
TB1
A
A
BK
BK
1
1
BK
BK
2
2
B
B
BK
BK
3
3
C
C
BK
BK
4
4
D
D
W
W
5
5
W
W
6
6
BK
E
E
G
G
7
7
BK
BK
8
8
W
W
9
9
G
G
10
10
DS1 YELLOW LED
(OFF NORMAL)
DS2 GREEN LED
(ON NORMAL)
DS3 RED LED
(OFF NORMAL)
F
F
F
F
BK/W (24VAC HOT)
BK/W ( ( 24VAC HOT) )
BK/W ( ( 24VAC HOT) )
BK/W (24VAC HOT)
W/BK (24VAC RTN)
W/BK ( ( 24VAC RTN) )
W/BK ( ( 24VAC RTN) )
W/BK (24VAC RTN)
G ( ( GROUND) )
G (GROUND)
G ( ( GROUND) )
G (GROUND)
OUTLET PROBE
OUTLET PROBE
with MR HIGH LIMIT
with MR HIGH LIMIT
COM
COM
NC
NC
Y (+5VDC)
Y (+5VDC)
Y
Y
BK/W
BK/W
Y/V
Y/V
HIGH GAS SWITCH
HIGH GAS SWITCH
HIGH GAS SWITCH
HIGH GAS SWITCH
COM
COM
COM
COM
NC
NC
NC
NC
BK/W
BK/W
R/G
R/G
LOW GAS SWITCH
LOW GAS SWITCH
COM
COM
NO
NO
8
POWER DISTRIBUTION
BOARD (PDB)
BOARD (PDB)
J1
J1
PUMP FUSE
F2-20A
F2-20A
1
1
2
2
3
3
4
4
5
5
XFORMER
XFORMER
FUSE
FUSE
6
6
F3-3A
F3-3A
J2
J2
1
1
2
2
3
3
BLOWER
BLOWER
6
6
FUSE
FUSE
7
7
F7-15A
F7-15A
J3
J3
1
1
2
2
MCB-II FUSE
MCB-II FUSE
F6-10A
F6-10A
DS1 YELLOW LED
3
3
(OFF NORMAL)
4
4
DS2 GREEN LED
(ON NORMAL)
5
5
DS3 RED LED
6
6
(OFF NORMAL)
15
15
INLET PROBE
INLET PROBE
R (+24VDC)
R (+24VDC)
R
R
BK (+5VDC)
BK (+5VDC)
BK
BK
BLOWER PROVER
BLOWER PROVER
COM
COM
NO
NO
BK/W
BK/W
BK/W
BK/W
R/G
R/G
R/G
R/G
BLOCKED INLET
BLOCKED INLET
COM
COM
NC
NC
BK/W
BK/W
R/G
R/G
BLOCKED FLUE
BLOCKED FLUE
COM
COM
NC
NC
TR
BK
BK
W
W
BK/W (24VAC HOT)
BK/W (24VAC HOT)
W/BK (24VAC RTN)
W/BK (24VAC RTN)
G (GROUND)
G (GROUND)
J
1
2
3
J
BK
BK
1
W
W
2
G
G
3
J8
BL (+5VDC)
BL (+5VDC)
2
BL
BL
3
J
1
2
4
5
J9
3
4
J1
1
2
BK/W
BK/W
J1
Y/V
Y/V
1
2
3
4
5
6
BK/W
BK/W
R/G
R/G
J
1
2
3
4
BK/W
BK/W
5
R/G
R/G
6
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Troubleshooting
