L8124A,B,C,E,G,L,M AQUASTAT® RELAYS
7
60-2061—10
Fig. 9. Position of bulb in immersion well, and use of well adapter when required.
WIRING
IMPORTANT
Terminals on the L8124 Aquastat Relay are
approved for use with only copper wire. The
terminals allow only wrap-around wiring.
1.
Strip 7/16 in. of insulation from
the wire end.
2.
Wrap the wire at least 3/4 of the
distance around the screw as
shown.
3.
Using a standard, flat-headed
screwdriver, tighten the screw
until the wire is snugly in contact
with the screw and contact plate.
4.
Tighten the screw an additional one-half turn.
NOTE: Do not use a push-type ratchet screwdriver.
All wiring must comply with local electrical codes and
ordinances. Do not exceed the limits in the Specifications
section when applying this control. Use manufacturer
instructions when wiring controlled equipment or refer to
typical hookups in Figs. 10 through 21.
Fig. 10. L8124A,C single zone connections
and internal schematic.
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)
M8843
M8802
L1
(HOT)
L2
1
1
2
2
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.
LINE VOLTAGE
OIL BURNER
RELAY OR
GAS VALVE
LINE VOLTAGE
CIRCULATOR
C2
C1
B2
B1
R
B
HIGH
LIMIT
ZC
ZR
1K1
B
R
W
LOW LIMIT/
CIRCULATOR
1K
2
1
G
T
T
L8124A,C
LOW VOLTAGE
THERMOSTAT
1K2
3
3
