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CONTROLLER
CASE
IMMERSION
WELL CLAMP
ADAPTER
)
2
CAPILLARY
TUBE
SETSCREW
IMMERSION
WELL CLAMP SCREW
Fig. 2. Position of bulb in immersion well and use of well adapter when required.
LOW VOLTAGE
THERMOSTAT
T
T
1K
W
R
LOW LIMIT/
CIRCULATOR
B
HIGH
1K2
LIMIT
R
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
1
OVERLOAD PROTECTION AS REQUIRED.
2
CONTROL CASE MUST BE CONNECTED TO EARTH GROUND.
USE GROUNDING SCREW PROVIDED.
3
B1 IS 1/4 IN. TAB TERMINAL.
Fig. 3. L8124A,C single zone connections
and internal schematic.
BOILER
1
IMMERSION
WELL SPUD
SHORT TUBE
FITS IN CENTRAL
RECESS OF ADAPTER
L8124A,C
2
G
L1
1
(HOT)
2
L2
B
1K1
ZR
ZC
LINE VOLTAGE
OIL BURNER
RELAY OR
GAS VALVE
3
B1
B2
C1
C2
LINE VOLTAGE
CIRCULATOR
BACK OF
CONTROLLER
CASE
OLD IMMERSION
WELL ASSEMBLY
(A)
HEAT-CONDUCTIVE COMPOUND
1
BEND THE CAPILLARY TUBE TO HOLD THE SENSING BULB IN GOOD
THERMAL CONTACT WITH THE IMMERSION WELL AT POINTS (A) AND (B).
2
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
TV
1K
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
1
OVERLOAD PROTECTION AS REQUIRED.
2
CONTROL CASE MUST BE CONNECTED TO EARTH GROUND.
USE GROUNDING SCREW PROVIDED.
3
B1 IS 1/4 IN. TAB TERMINAL.
Fig. 4. L8124E single zone connections
M8802
3
L8124A,C,E,L AND M AQUASTAT® RELAYS
IMMERSION
WELL CLAMP
ADAPTER
IMMERSION
WELL CLAMP
SCREW
LOW VOLTAGE
THERMOSTAT
L8124E
T
Z
1K2
W
R
B
LOW LIMIT/
CIRCULATOR
R
HIGH
LIMIT
B
3
and internal schematic.
SENSING
BULB
(D)
(B)
M883
2
G
L1
1
(HOT)
2
L2
1
1K1
LINE VOLTAGE
CIRCULATOR
C1
C2
TR
B1
B2
TH
LOW VOLTAGE
GAS VALVE
(eg, VR8300)
M8803
95-6571—11
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