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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 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 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. UP TO TWO V8043F ZONE VALVES CAN BE POWERED WITH L8124G,L. ADD ADDITIONAL TRANSFORMER FOR EVERY TWO OR LESS VALVES. 3 4 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. B1 IS 1/4 IN. TAB TERMINAL. M1795B Fig. 7. L8124 multizone system with zone valveconnections and internal schematic. 2 L8124A,C,E,L AND M AQUASTAT® RELAYS L1 (HOT) L2 1 3 TH TR LOW VOLTAGE L8124EG L2 L1 C1 C2 T T B2 B1 T87F CIRCULATOR GAS VALVE (eg, VR8300) 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. M1796A Fig. 8. L8124E in a 24Vac, gas-fired, forced hot water, tankless system. 2 3 1 5 95-6571.11 L8124A,C,E,L AND M AQUASTAT® RELAYS L1 (HOT) L2 1 2 3 T T 1 2 3 4 5 6 TH TR LOW VOLTAGE GAS VALVE (eg, VR8300) L8124E AQUASTAT® RELAY G L2 L1 C1 C2 T T B2 B1 T87F R845 RELAY T T 1 2 3 4 5 6 T87F R845 RELAY T T 1 2 3 4 5 6 T87F R845 RELAY PUMP PUMP PUMP L8124A,C,E,L AND M AQUASTAT® RELAYS L1 (HOT) L2 1 2 3 T T 1 2 3 4 5 6 TH TR LOW VOLTAGE GAS VALVE (eg, VR8300) L8124E AQUASTAT® RELAY G L2 L1 C1 C2 T T B2 B1 T87F R845 RELAY T T 1 2 3 4 5 6 T87F R845 RELAY T T 1 2 3 4 5 6 T87F R845 RELAY PUMP PUMP PUMP 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. 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 LOW VOLTAGE THERMOSTAT R845A RELAY ZONE 1 ZONE 1 CIRCULATOR 2 3 LOW VOLTAGE C2 C1 B2 B1 R B HIGH LIMIT Z 1K1BRW LOW LIMIT/ CIRCULATOR 1K 2 1 G TTV L8124E 1K2 TR TH THTR 3 B1 IS 1/4 IN. TAB TERMINAL. M8828 GAS VALVE (eg, VR8300) Fig. 10. L8124E multizone system with circulator connections and internal schematic. 95-6571.11 6 L8124A,C,E,L AND M AQUASTAT® RELAYS L8124A,C,E,L AND M AQUASTAT® RELAYS THERMOSTAT B1 IS 1/4 IN. TAB TERMINAL. M8829 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. 2 1 4 3 5 6 ZONE 1 ZONE 2 LOW VOLTAGE THERMOSTAT R845A RELAY ZONE 2 ZONE 2 CIRCULATOR TO ADDITIONAL LINE VOLTAGE R845A RELAYS FOR OTHER ZONES LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE ZONE 1 B2 C2 CIRCULATOR C1 ZR B1R B HIGH LIMIT Z 1K1 RW LOW LIM...

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