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L8148A,E,J AQUASTAT® RELAYS
5 95-6940—12
Fig. 5. Wiring L8148A in oil-fired, forced hot water, tankless, zoned, pump system.
Fig. 6. Wiring L8148E1265 with internal plug directly to vent damper in hydronic intermittent pilot system.
TT
1
23
4
5
6
TT
1
23
4
5
6
TT
1
23
4
5
6
GL2L1 T T
C1 C2
B2 B1
F
F
T
T
L1
(HOT)
L2
PUMP PUMP PUMP
T87F T87F T87F
R845
RELAY
R845 R845
C554
R8184G
BURNER
AND
IGNITION
ORANGE
WHITE
BLACK
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
1
2
L8148A
2
1
M2843A
3
3
24V GND
24V
S8600
L1
(HOT)
L2
1
1
2
3
4
5
L8148E1265
4
2
3
3
FUSE
5
1
2
5
6-PRONG FEMALE MOLEX
RECEPTABLE IN L8148E
AND 5-PRONG MALE
MOLEX PLUG ON CABLE
1K1
B1
B2
L1
C1 C2
L2
CIRCULATOR
POLARIZED 4-PRONG
MALE MOLEX PLUG AND
4-PRONG FEMALE
MATING PLUG ON CABLE
1
2
3
4
24 VAC
THERMOSTAT
D892/M892
4 197516A
CABLE
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
REMOVE PLUG-IN THAT JUMPERS PINS 2 AND 3 WHEN USING VENT
DAMPER.
AFTER VENT DAMPER IS PLUGGED INTO L8148E1265, FUSE BLOWS
WHEN THERMOSTAT FIRST CLOSES. AFTER FUSE BLOWS, L8148E1265
OPERATES ONLY WHEN VENT DAMPER IS CONNECTED.
SEE VENT DAMPER PRODUCT SPECIFICATIONS FOR INTERNAL
SCHEMATICS.
B1 IS 1/4 IN. TAB TERMINAL.
M2763C
1K2
HIGH LIMIT
CONTROLLER
R
B
TV
W
T
1K
Z
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