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L8148A,E,J AQUASTAT® RELAYS
95-6940—12
Fig. 3. External connections and internal schematic for L8148A.
Fig. 4. Internal schematic and external connections for L8148J with either low voltage or
millivoltage gas valves. Low limit added in hookup with 24V gas valve.
C1
C2
B1
B2
R
W
B
G
L1
L2
T
T
3
B
R
L1
L2
G
T
T3
C1
C2
B2 B1
JUMPER
1K
1K2
1K1
B
R
L6006
LOW LIMIT
CONTROLLER
L1
HOT
L2
24V
THERMOSTAT
L8148A
HIGH
LIMIT
TO LINE
VOLTAGE
OIL BURNER
RELAY OR
GAS VALVE
CIRCULATOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOADPROTECTION AS REQUIRED.
REMOVE JUMPER WHEN ADDING L6006 LOW
LIMIT CONTROLLER.
CONTROL CASE MUST BE CONNECTED TO EARTH
GROUND. USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
1
2
3
4
4
1
2
3
M2842A
L8148A
4
L1
(HOT)
L2
1
1
4
5
5
1
2
3
4
5
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
REMOVE Z-W JUMPER IF SERIES 60 LOW LIMIT IS USED.
WIRE LOW LIMIT CONTROLLER OR ZONE VALVES AS
SHOWN. USE WITH 24V (B1-B3) CIRCUIT ONLY.
FOR 24V BURNER, WIRE B1-B3 AND USE JUMPER Z-W
AND TP-Z. FOR POWERPILE® (MILLIVOLTAGE) GAS
VALVES, REMOVE JUMPER TP-Z AND WIRE BURNER
B1-B2. JUMPER Z-W REMAINS IN POSITION.
CONTROL CASE MUST BE CONNECTED TO EARTH
GROUND. USE GROUNDING SCREW PROVIDED.
B1 IS 1/4 IN. TAB TERMINAL.
L6006
LOW LIMIT
CONTROLLER
POWERPILE®
MILLIVOLTAGE
GAS VALVE
PP
PP
TH2
TH1
W
R
R
R
B
B
B
24V
THERMOSTAT
L8148J
CIRCULATOR
G
G
L1
L1
L2B3B2B1
HIGH
LIMIT
TP
TV
T
W
Z
C1
C2
TR
TH
THTR
LOW VOLTAGE
GAS VALVE
(eg, VR8300)
1K3
TP
Z
WT
TV
1K2
AUTO
MANUAL
SWITCH
1K1
C1
C2
B3
B2
B1
L2
L8148J
M1793B
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