Lochinvar 399 Installation And Service Manual page 69

WIRING DIAGRAM A 990,000 - 2,070,000 BTU/HR
MODELS
R/BK
R/BK
O/BK
O/W
R/W
R/W
PR
BL
BOARD
BL Y
1
13
BR R
2
14
O/BK R/O
3
15
O T
4
16
BK
5
17 PR/
BR/W
18 6
PR
19 7
BR
8
20
W
9
21
n/a
22
n/a
23
Y
12
24
Installation and
Service Manual
O.C.
PR PR
P
RELAY
FF
ADDED ALARM
UNLESS CONNECTED
69
J2
G ND