Boiler Installation and Owners Manual
24
LDJ991_E01_R03_2006.03
Models LDJ991 and LDJ991-10
W
I R I N G
D
I A G R A M
: L D J 9 9 1 - 1 0 1 6 5 , 0 0 0 B T U V
A R I A B L E
R
A T E
B
O I L E R
RD
WH
120V
24V
Transformer
M
Combustion
Blower Motor
120V
NEUTRAL
120V
HOT
Fuse
10A
Disconnect
(Installed By Others)
Toggle Switch
START
OFF
RUN
START
OFF
RUN
BK
H-BK
H-BK
WH
WH
Boiler Control Box
210°F
High Limit
Switch
Low Limit
Switch
Closes on
temp. rise
RED
RED
BK
Burner Relay (HR)
NO
NC
Relay
BLUE
OR
4
5
2
OR
1
3
Low Fire
Timer/Relay (LF)
7
2
timer
NC
NO
1,8
3,6
High Fire
Timer/Relay (HF)
7
2
timer
NC
NO
1,8
3,6
OR
M
Furnace Auger
Motor
M
Bin Auger
Motor
OR
WH
Thermostat
connections
T
T
Aquastat Relay
L1
L2
B2
B1
BLUE
BLUE
BLUE