48 | AUX. DEVICE |
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RELAY |
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| AUX. DEVICE |
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| PROVING SWITCH |
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| HIGH GAS | C | 24VAC | AUX. DEVICE |
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| PILOT SUPPLY |
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| PRESSURE SWITCH | NO | GND |
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| AUX. DEVICE |
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| (500 ONLY) | NC |
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| PROVING |
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| GAS PRESSURE |
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| LOW GAS | C | SWITCH |
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| FLOW |
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| PRESSURE SWITCH | NO |
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| SWITCH |
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| (500 ONLY) | NC | ALARM |
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| CONTACTS | CN4 |
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| COM | RUNTIME |
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| CONTACTS |
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| FLOW SWITCH | NO | DHW THERMOSTAT | LOW WATER |
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| R | ROOM THERMOSTAT / | CUTOFF | ||
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| W | ZONE CONTROL | |||
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| CN5 |
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| CN2 |
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| SYSTEM |
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| TANK THERMOSTAT |
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| DHW TANK |
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| SENSOR |
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| OUTDOOR |
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| SENSOR |
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| WALL THERMOSTAT / |
| SHIELD GROUND |
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| A | SEQUENCING |
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| ZONE CONTROL |
| B |
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| SHIELD GROUND | CN3 |
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| EXTERNAL |
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| SYSTEM SUPPLY SENSOR |
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| GND | CONTROL |
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| CN1 |
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| (AUX) DHW SENSOR |
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| OUTDOOR SENSOR |
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| BUILDING |
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| MANAGMENT |
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| SYSTEM |
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| LOW WATER |
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| CUTOFF |
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| SHIELD |
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FROM |
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PREVIOUS A | A | NEXT | |
BOILER | B | B | BOILER |
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Figure 8-3 Low Voltage Field Wiring Connections
8 Field wiring
Installation & Operation Manual
