Lochinvar 000 - 2 - Manual (Page 48)

48
WIRING DIAGRAMS - MAIN UNIT CONNECTIONS
MODELS 495,000 - 745,000 BTU/HR
POWER
SWITCH
120 VAC
TRIAL
24 VAC
HEATING
24VAC FLAME
FAILURE
BK
W
GY
GY
O
Y
BL
PR
HI-LIMIT
C NO NC
C 2 1
AUX
HI-LIMIT
OPTIONAL
C NO NC
C 2 1
1 4
5
9
10
12 15 3 6
8
7 13
BK/W
11
BK
O
R
R
BK
INLET
SENSOR
H
HI-LIMITS - PWR SW
JUMPERED IF
NOT PROVIDED
DISCONNECT POWER BEFORE SERVICING THE UNIT
T=TAN
Y=YELLOW
BR=BROWN
G=GREEN
GY=GRAY
R=RED
W = WHITE
BK = BLACK
PR=PURPLE
BL=BLUE
P=PINK
O=ORANGE
x MATING
BLOCKS
SPLICE SPLICE
LOW GAS HIGH GAS
NO COM NC
OPTIONAL HIGH-LOW GAS PRESSURE
NO COM NC
BL
BL
PR
24V
A
C
C
O
M
OPT. REMOTE
THERMOSTATS
ON/OFF (HIGH
FIRE) (LOW FIRE)
OPTIONAL
FLOW
SWITCH
X & B =
INTERMITTENT PUMP
CONNECT TO:
R1 - W1 =
CONTINUOUS PUMP
COM
NC
NO
WHEN REPLACING DAMAGED WIRING, USE EQUIVALENT TYPE AND GAUGE.
DOTTED LINES INDICATE
OPTIONAL EQUIPMENT
UNLESS OTHERWISE
INDICATED
W
BR
W
BR
1
2
SHUTOFF
VALVE
NORMALLY
OPEN VENT
VALVE
OPTIONAL
SHUTOFF/ NORMALLY OPEN
VENT VALVE
120VAC
120VAC
GAS TRAIN
R1 W1 R2 W2 A X B C
STAGE 1 STAGE 2 LIMITS
1 4
5
3 6
1
2
4
5
9
10
11
12
14
15 3 6
8
7 13
4 5
9
10 12
15
3
6
8 7
13
1
O
R/O
R/O
O/W
PR
11
SPL
IC
E
1
2
W
BR
O/W
PR
Y
OPTIONAL
SYSTEM/
TANK
SENSOR
Y
R/O
BK
BK
BK/W
GY
GY
Y
W
H
D
ACCS.
PLUG
G
TERMINAL STRIP - SENSOR
O
P
ST
A
N
D
A
RD
BL
O
O
P T.
B
O
X
.
O
P
T.
B
O
X
.
NO
T
US
E
D
PR
O
1 4
5
3 6
24V
DC
1
2
9
10
11
12 3
8
7
1
2
1 2
4
3
6
8 7
SPL
IC
E
1
0
1 4
5
10
11
12
14
3 6
7 13
S
P
L
ICE 1
PUMP DELAY RELAY
"24VDC"COIL
D E F
A
B
BK/W
BK
O
O
SPL
IC
E
9
G
24COM
GND
CONTROL PANE
SPL
ICE 3
C
O
P
T
ION
B
O
X
CO
NN
EC
T
O
R
PINS 1 & 2
JUMPERED
PROVIDED
IF NO
OPTIONS
ARE
ORDERED
SP
L
IC
E
4
SP
L
IC
E
2
SP
L
IC
E
7
S2/FS
F1
F2
LINE
S1
NEU
5
4
1
2
3
GY/W
TH 10
PI 9
8 24COM
NOT
USED
O
P
BK
W
G
1
2
4
5
7 10
11
12
14
13
3 6
BR
GY
PR/W
IGNITION
MODULE
RESET 7
24VAC 6
5
PS 4
3
M/S 2
FF 1
T
BL/W
PR/W
MV
BL/W
BL
R
B
BL
FLAME FAIL RESET
IGNITION MODULE
SP
L
IC
E
BK
BL
P
R
9
LO
UV
ER
NO
CO
M
N
C
T
BL
5
RE S E T NORMALLY
CLOS E D
PR
8
24
V
A
C
CO
N T
R O
L
J 3
5
4
6
1
2
3
O.C.
J1
J2
3 2 1 J4
P
GND
GND
PR
BL
BL
Y Y
Y
Y
P R
G
G
O
P
P
PR
TI
M
E
DE
L
A
Y
1
2
3 4
BR
6
Y
SPLICE
7
O
W
R
T
Y
G
T
OPTION BOX "C"
O/W
T
T
BR
BR
O BR
NO
C
C
T
NO
NO C
Y
C
BR/W
O
P
O