See Fig. 1. SENSING ELEMENT IS FACTORY FORMED FOR 1.5 IN. INSULATION WELL ASSEMBLIES. FOR 3 IN. INSULATION WELL ASSEMBLIES, PULL OUT SUFFICIENT CAPILLARY TO ASSURE THAT THE CAPSULE BOTTOMS IN THE WELL. STRAIGHTEN CAPILLARY SUFFICIENTLY SO IT DOES NOT CAUTION: EXCESSIVE HANDLING OR SHARP BENDS CAN DAMAGE THE CAPILLARY. 2 3 1 2 3 1 INTERFERE WITH INSERTION OF THE CAPSULE INTO THE WELL. M8882 Fig. 1. Adjusting the capillary length. Mounting Each relay is suitable for use with an immersion well for

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 1 1 2 2 (D) (B) (A) L8124A,C,E,L AND M AQUASTAT® RELAYS 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 SHO

6. L8124A,C multizone system with circulator connections and internal schematic. 95-6571.11 4 L1 (HOT) L2 1 3 2 4 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE LINE VOLTAGE CIRCULATOR B2 C2 C1 ZR B1R B HIGH LIMIT Z 1K1 BRW LOW LIMIT/ CIRCULATOR 1K 2 1 G TTV L8124G,L ZONE 1 THERMOSTAT 1K2 V8043F TH TR TH TR ZONE 2 THERMOSTAT V8043F TH TR TH TR ZC 1 2 L1 (HOT) L2 1 3 2 4 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE LINE VOLTAGE CIRCULATOR B2 C2 C1 ZR B1R B HIGH LIMIT Z 1K1 BRW LOW LIMIT/ CIRCULATOR 1K

11. L8124L multizone system with circulator connections and internal schematic. OPERATION High Limit Controller The high limit opens and turns off the burner when the water temperature reaches the setpoint. The high limit automatically resets after the water temperature drops past the setpoint and through the 10°F (6°C) differential. WARNING Explosion Hazard. Can cause serious injury, death or equipment damage. Use this product only in systems with a pressure relief valve. Low Limit and Circulat

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. M1794A 1 2 3 Fig. 9. L8124E in a 24 Vac, gas-fired, forced hot water, tankless, zoned pump system. 1 TO ADDITIONAL R845A RELAYS L2 L1 FOR OTHER ZONES (HOT) 1 2 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. 2 1 4 3 5 6 ZONE 1

4. Always unplug heater when not in use. 5. Do not operate the heater with a damaged cord or plug or after the heater malfunctions, has been dropped or damaged in any manner. Return heater to authorized service facility for examination, electrical or mechanical adjustment, or repair. 6. Do not use outdoors. 7. This heater is not intended for use in bathrooms, laundry areas and similar moist indoor locations. 8. Do not run cord under carpeting. Do not cover cord with throw rugs, runners, or the l

Please visit our website at CLEANING AND STORAGE We recommend that the heater be cleaned at least once a month and before off-season storage. • Turn the heater OFF and unplug it. Allow it to cool. • Use a dry cloth only to clean the external surfaces of the heater. DO NOT USE WATER, WAX, POLISH OR ANY CHEMICAL SOLUTION. • Clean your heater using the above-mentioned steps, then pack the heater in its original container and store it in a cool dry place. • This heater does not disassemble. ELECTRIC

16. Use this heater only as described in this manual. Any other use not recommended by the manufacturer may cause fire, electric shock, or injury to persons. 17. Avoid the use of an extension cord because the extension cord may overheat and cause a risk of fire. However, if you have to use an extension cord, the cord shall be No. 14 AWG minimum size and rated not less than 1875 watts. 18. The output of this heater may vary and its temperature may become intense enough to burn exposed skin. Use o