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L8148A,E,J AQUASTAT® RELAYS
3 95-6940—12
Fig. 2. Proper position of sensing bulb in immersion well, and use of well adapter in existing well.
WIRING
IMPORTANT
The terminals of these Aquastat® Relays are
approved for use with copper wire only.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect power supply before making wiring
connections to prevent electrical shock or
equipment damage.
All wiring must comply with local electrical codes and
ordinances. Do not exceed the specifications in the
Application section when applying this control.
L8148J can power up to two V8043 Zone Valves.
Additional valves, in groups of two or less, require an
additional transformer. Follow the appropriate wiring
diagrams when using zone valves or a low limit
controller. See Fig. 3 through 7.
If the B1 terminal on the device being replaced is a 1/4 in.
tab terminal, use the existing wiring harness terminals to
install the replacement device. If the B1 terminal on the
device being replaced is a screw terminal, insert the
provided tab terminal to screw terminal adapter onto the
1/4 in. tab terminal of the replacement device. After the
adapter is installed, reuse the existing wraparound wire
end to make an electrical connection to the B1 terminal.
CAUTION
Equipment Damage Hazard.
Can cause incorrect operation.
1.If L8148E,J are used to power zone valves,
low voltage (24 Vac) load must not exceed
1.4A; a 1.2A load is the maximum permissible
when ambient temperature exceeds 77°F
(25°C). Use additional transformer(s) when
load exceeds these ratings.
2.When L8148E is used to power SV9500/
SV9600, use separate transformer to power
zone valves.
CONTROLLER
CASE
IMMERSION
WELL CLAMP
ADAPTER
IMMERSION
WELL SPUD
BOILER
OLD IMMERSION
WELL ASSEMBLY
BACK OF
CONTROLLER
CASE
IMMERSION
WELL CLAMP
SCREW
ADAPTER
SENSING
BULB
HEAT-CONDUCTIVE COMPOUND
SETSCREW
CAPILLARY
TUBE
(C)
IMMERSION
WELL CLAMP
IMMERSION
WELL CLAMP SCREW
SHORT TUBE
FITS IN CENTRAL
RECESS OF ADAPTER
BEND THE CAPILLARY TUBE TO HOLD THE SENSING BULB IN GOOD
THERMAL CONTACT WITH THE IMMERSION WELL AT POINTS (A) AND (B).
ASSURE THAT CAPILLARY TUBE FITS FREELY IN THE ADAPTER SO THE
TENSION OF THE CAPILLARY TUBE AT POINT (C) HOLDS THE SENSING
BULB IN GOOD THERMAL CONTACT WITH THE IMMERSION WELL AT POINT (D).
M8830
1
1
2
2
(D)
(B)
(A)
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