Ab c, Ed f f, Ca ut io n – Lochinvar 399 User Manual
Page 64: 120 v a c

Hydronic Heating Boilers and
Domestic Water Heaters
64
WIRING BOX CONNECTIONS - WIRING DIAGRAM A
399,999 - 750,000 BTU/HR MODELS
PR
BR
12
3
56
4
24
VAC XF
M
R
.
ELE
C
TR
O
N
IC
CO
NT
RO
LL
ER
D
ISPL
A
Y
BO
ARD
AL
AR
M
E
N
AB
LE
RE
LA
Y
24
V
SENSO
R
CO
NN
EC
TO
R
CI
R
C
UI
T
BR
E
A
KE
R
120V
24V
OP
TI
O
N
A
L
FL
A
M
E
F
A
IL
EN
A
B
LE
R
E
LA
Y
24
V
BK
W
BL
Y
Y
Y
S2
/F
S
F2
F1
S1
NE
U
4
2
3
11
-
+
-
+
IGN
IT
IO
N
M
O
DUL
E
TH
10
PI
9 8
24CO
M
RE
S
E
T
7
24V
A
C
6
MV
5
PS
4
3
M/
S
2
FF
1
LI
N
E
LI
N
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N
1
IG
N
1
P1 S1 S2 S2
+
S2
-
+2
4
CO
M
AL
R
RS
T1
2
3
4
5
6
7
8
9
1
12
Y
PR
Y
P
BL
PR
/
BK
Y
P
1
2
3
PR
/
BK
OP
TI
ON
A
L
PR
Y
BL
PR
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BK
5
4
3
2
1
5
4
3
2
1
RU
NT
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E
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LA
Y
1
2
3
4
TO
LW
C
O
5
6
1
3
9
8
7
14
12
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
10
11
1
2
3
4
5
6
7
8
9
32
1
PR
/
BK
3
1
6
5
4
9
7
2
5
1
15
TO
LW
C
O
3
1
6
5
4
9
7
P P
Y
Y
GY
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BL R
T/
W
PR
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BK
GY
W
BK
GY
GY
BL
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BR
W
PR
BR
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T
PR
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K
BK
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G
W
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W
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T
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W
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1
2
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4
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BK
BL
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R
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R
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K
Y
W
BL
PR
Y
Y
BL
BR
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BR/W
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R/O
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R/BK
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1
2
3
BL
A
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4
G
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24
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M
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N
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R
14
15
16
17
18
19
20
21
22
23
13
24
n/a
n/a
TH
4
1
5
6
9
7
BL
BL
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20
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1
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4
5
6
7
8
9
10
11
12
IGN
2
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2
P2 S3 S4
S2
+
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RS
T2
1 2 3 4 5 6 7 8 9 10
R
NO
T
US
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PR
8
ST
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#2
2
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2
3
4
5
6
7
8
9
1
12
14
15
16
17
18
19
20
21
22
23
13
24
n/
a
n/
a
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A
T
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2
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n/
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120
V
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1
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10
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A
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LIM
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7
4
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T
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WHI
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