Operating instructions

INSTALLATION—SYSTEM PIPING.........................................................................................................................................................................7
For Use with Cooling Units.....................................................................................................................................................................................7
Low Design Water Temperature Systems (Below 140°F)......................................................................................................................................7
CHIMNEY AND VENT PIPE CONNECTION .....................................................................................................................................................7-10
Checking Chimney....................................................................................................................................................................................................8
Chimney Sizing.........................................................................................................................................................................................................8
Connecting Vent Damper and Vent Connector.......................................................................................................................................................8
Minimum Vent Pipe Clearance................................................................................................................................................................................9
Removing Existing Boiler from Common Venting System ..............................................................................................................................9-10
VENT DAMPER OPERATION ............................................................................................................................................................................10-11
Automatic Operation of Vent Damper...................................................................................................................................................................10
Manual Operation of Vent Damper .......................................................................................................................................................................10
Notes for Canada Only......................................................................................................................................................................................10-11
GAS SUPPLY PIPING................................................................................................................................................................................................11
Checking Gas Supply .............................................................................................................................................................................................11
Connecting Gas Piping...........................................................................................................................................................................................11
Checking Gas Piping ..............................................................................................................................................................................................11
ELECTRICAL WIRING ........................................................................................................................................................................................11-14
Electric Power Supply ............................................................................................................................................................................................12
Installing Thermostat ..............................................................................................................................................................................................12
Wiring Diagrams ...............................................................................................................................................................................................13-14
Vent Damper Wiring ..............................................................................................................................................................................................12
EQUIPMENT AND OPTIONAL ACCESSORIES ..............................................................................................................................................15-16
Relief Valve ............................................................................................................................................................................................................15
Expansion Tank ......................................................................................................................................................................................................15
Diaphragm-Type Expansion Tank..........................................................................................................................................................................15
Air-Eliminating Fitting (Air Purger)......................................................................................................................................................................15
Main Air Vent for Downflow Systems or Diaphragm-Type Expansion Tank ....................................................................................................15
Automatic Fill Valve ..............................................................................................................................................................................................15
Drain Valve.............................................................................................................................................................................................................15
Water Temperature Control....................................................................................................................................................................................15
Circulating Pump ....................................................................................................................................................................................................15
Vent Damper...........................................................................................................................................................................................................15
Rollout Switch (Flame Rollout Safety Shutoff) ....................................................................................................................................................15
Spill Switch (Blocked Vent Shutoff System)........................................................................................................................................................16
STARTING BOILER...................................................................................................................................................................................................16
How a Hot Water System Operates.......................................................................................................................................................................16
Filling System with Water......................................................................................................................................................................................16
FOR YOUR SAFETY READ BEFORE OPERATING ............................................................................................................................................16
GAS VALVE OPERATING INSTRUCTIONS....................................................................................................................................................16-17
Intermittent Ignition Boiler—VR8204A/VR8304M Gas Valve ......................................................................................................................16-17
Continuous Pilot Boiler—VR8200A/VR8300A Gas Valve..................................................................................................................................17
OPERATING BOILER................................................................................................................................................................................................18
Automatic Gas Valve..............................................................................................................................................................................................18
Safety Pilot..............................................................................................................................................................................................................18
Gas Valve Safety Shutdown Test ..........................................................................................................................................................................18
Relight.....................................................................................................................................................................................................................18
Thermostat...............................................................................................................................................................................................................18
CHECKING AND ADJUSTING......................................................................................................................................................................18-19
Pilot Burner Adjustment....................................................................................................................................................................................18
Main Burner Air Adjustment............................................................................................................................................................................18
Limit Controls Adjustment................................................................................................................................................................................19
MAINTAINING BOILER ................................................................................................................................................................................19-20
Burners...............................................................................................................................................................................................................19
Relief Valve..................................................................................................................................................................................................18-19
Expansion Tank.................................................................................................................................................................................................19
Boiler Flue Passages..........................................................................................................................................................................................19
Vent Pipe ...........................................................................................................................................................................................................19
Water System.....................................................................................................................................................................................................19
Cleaning Boiler and Burners .......................................................................................................................................................................19-20
SERVICE HINTS...................................................................................................................................................................................................21
REPAIR PARTS................................................................................................................................................................................................22-25
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