Wiring Diagram - A.O. Smith VB 1500 User Manual

WIRING DIAGRAM

RANSFORMER TRANSFORMER
120/24 VAC 120/24 VAC
24VAC 24VAC
COM COM
W/BK W/BK
BK/W BK/W
W/BK W/BK
BK/W BK/W
BK BK
W W
G G
F F F F
CAT-5 CABLES CAT-5 CABLES
J12 or J13 J12 or J13
J20 or J21
J3 J3
(External Comm) (Internal Comm) (External Comm) (Internal Comm)
1
2
MODULATING MODULATING
3
CONTROL BOARD II CONTROL BOARD II
J1 J1
(MCB-II) (MCB-II)
1
2
SEE MCB-II DETAIL A SEE MCB-II DETAIL A
3
8 J8
OFF OFF
2
3
SW1 SW1
1 1
J7 J7
ON
1
2
4
DS1 RED LED (ON FOR DS1 RED LED (ON FOR
5
BLOWN F1 FUSE) BLOWN F1 FUSE)
9 J9
F1-7.5A F1-7.5A
(24VAC) (24VAC)
3
4
SEE MCB-II DETAIL B SEE MCB-II DETAIL B
11 J11
1
2
ON ON OFF OFF
17 J17
1 1
SW2 SW2
1
2
3
4
DS2 MAIN MICRO DS2 MAIN MICRO
5
YELLOW LED (2 HERTZ YELLOW LED (2 HERTZ
6
FLASH NORMAL) FLASH NORMAL)
J5 J5
DS3 FLAME MICRO DS3 FLAME MICRO
YELLOW LED (2 HERTZ YELLOW LED (2 HERTZ
1 1
FLASH NORMAL) FLASH NORMAL)
2 2
3 3
4 4
5 5
6 6
USER INTERFACE MODULE USER INTERFACE MODULE
CAT-5 CABLE CAT-5 CABLE
R (+24VDC)
BL (RPM FEEDBACK)
J20 or J21
J24 J24
1 1
2 2
6 6
7 7
J2 J2
BK BK
1 1
W W
2 2
J18 J18
BK BK
1 1
W W
ON
2 2
J19 J19
BK BK
1 1
W W
2 2
R R
J16 J16
J23 J23 CONFIGURATION KEY
BK BK
1 1
R R
2 2
J4 J4
BK/W – POWER ACC 24VAC
1 1
W/G – POWER ACC PROVER
2 2
W/BK – POWER ACC 24VAC RTN
3 3
BK/W BK/W
4 4
R/G R/G
5 5
W/BK W/BK
6 6
BK/W – ALARM 24VAC
7 7
W/BK – ALARM 24VAC RTN
8 8
P1 P1
3 2 1 3 2 1
C1 C1
3 2 1 3 2 1 3 2 1 3 2 1
BK/W BK/W
W/BK – 24VAC RTN W/BK – 24VAC RTN W/BK – 24VAC RTN W/BK – 24VAC RTN
G G
R/G – LWCO INPUT R/G – LWCO INPUT
BK/W – 24VAC BK/W – 24VAC
(UIM) (UIM)
BLOWER BLOWER
ST1 ST1
1 1
2 2
ST2 ST2
3 3
1 2 3 5 1 2 3 5
R (+24VDC)
BL (RPM FEEDBACK)
Y/R (0-10VDC COMMAND) Y/R (0-10VDC COMMAND)
BK/W (0-10VDC RTN) BK/W (0-10VDC RTN)
BK BK
A A
PUMP RELAY PUMP RELAY
NO NO
COM COM
IGNITER IGNITER
BK
BL
Y
SPLICES SPLICES
R
R
CONFIGURATION KEY
BK/W – POWER ACC 24VAC
W/G – POWER ACC PROVER
W/BK – POWER ACC 24VAC RTN
BK/W – ALARM 24VAC
W/BK – ALARM 24VAC RTN
LWCO BOARD LWCO BOARD LWCO BOARD LWCO BOARD
R R
L1 L1 L1 L1 LLCO LLCO LLCO LLCO
BK/W BK/W
COM COM COM COM
L2 L2 L2 L2
G G
G G G G
NO NO NO NO
R/G – LWCO INPUT R/G – LWCO INPUT
BK/W – 24VAC BK/W – 24VAC
9
LEGEND LEGEND
120VAC WIRING 120VAC WIRING
LOW VOLTAGE WIRING LOW VOLTAGE WIRING
CAT-5 COMM CABLE CAT-5 COMM CABLE
AVAILABLE OPTION AVAILABLE OPTION
NOTE1: IF ANY OF THE ORIGINAL WIRE AS SUPPLIED NOTE1: IF ANY OF THE ORIGINAL WIRE AS SUPPLIED
WITH THE APPLIANCE MUST BE REPLACED, REPLACE WITH THE APPLIANCE MUST BE REPLACED, REPLACE
WITH EQUIVALNET GAUGE WIRE, INSULATION TYPE WITH EQUIVALNET GAUGE WIRE, INSULATION TYPE
105°C, 600 VOLTS. 105°C, 600 VOLTS.
NOTE2: UNIT MAY HAVE ALL, SOME, OR NONE OF NOTE2: UNIT MAY HAVE ALL, SOME, OR NONE OF
THE OPTIONS. THE OPTIONS.
NOTE3: VW UNITS COME EQUIPPED WITH PUMP, VB NOTE3: VW UNITS COME EQUIPPED WITH PUMP, VB
UNITS DO NOT. UNITS DO NOT.
Part of J-BOX Part of J-BOX
BK BK
C C
W W
D D
G G
E E
BK BK
B B
GAS VALVE GAS VALVE
BK
BL G G
GV GV
Y
FLAME SENSE FLAME SENSE
R
R
EXTERNAL POWER EXTERNAL POWER
ACCESSORY INTERFACE ACCESSORY INTERFACE ACCESSORY INTERFACE ACCESSORY INTERFACE
Part of J-BOX Part of J-BOX
R R
LWCO PROBE LWCO PROBE LWCO PROBE LWCO PROBE
(317415-000 REV 1) (317415-000 REV 1)
PUMP PUMP PUMP PUMP
(EXTERNAL) (EXTERNAL) (EXTERNAL) (EXTERNAL)
1 HP MAX 1 HP MAX 1 HP MAX 1 HP MAX
(SEE NOTE3) (SEE NOTE3) (SEE NOTE3) (SEE NOTE3)
EXTERNAL POWER EXTERNAL POWER
24VAC SWITCHED 24VAC SWITCHED 24VAC SWITCHED 24VAC SWITCHED
POWER POWER POWER POWER
PROVER PROVER PROVER PROVER
NO NO
COM COM
EXTERNAL ALARM EXTERNAL ALARM EXTERNAL ALARM EXTERNAL ALARM