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L8124A,C,E,L AND M AQUASTAT® RELAYS
3 95-6571—11
Fig. 2. Position of bulb in immersion well and use of well adapter when required.
Fig. 3. L8124A,C single zone connections
and internal schematic.
Fig. 4. L8124E 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
)
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
M883
1
1
2
2
(D)
(B)
(A)
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
M8803
L1
(HOT)
L2
1
3
1
2
3
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.
LOW VOLTAGE
GAS VALVE
(eg, VR8300)
LINE VOLTAGE
CIRCULATOR
C2
C1
B2
B1
R
B
HIGH
LIMIT
Z
1K1
B
R
W
LOW LIMIT/
CIRCULATOR
1K
2
1
G
T
TV
L8124E
LOW VOLTAGE
THERMOSTAT
1K2
TR
TH