Dunkirk DCC-150 - Manual Calibration Function

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10.2 Testing For Gas Leaks And Purging The Gas
Supply
• With boiler gas service cock closed (spindle ats at right
angles to valve). Pressure test gas supply and inlet pipe
work connection to boiler gas service cock for soundness.
• Loosen screw of pressure inlet gas test port on gas valve.
See section 13.4 Gas Valve. Verify gas supply is ON.
Open boiler service cock to purge.
• Retighten test port screw and test for gas leaks. Close
boiler gas shutoff device.
10 - OPERATING INSTRUCTIONS
WARNING
If you do not follow these instructions exactly,
a re or explosion may result causing property
damage, personal injury or loss of life.
• This appliance is equipped with an ignition device
which automatically lights burner. Do NOT try to
light this burner by hand.
• Before operating smell all around appliance area for
gas. Be sure to smell next to oor because some
gas is heavier than air and will settle to the oor.
• Use only your hand to turn the gas shutoff
valve. Never use tools. If valve will not turn by
hand, do not try to repair it, call a qualied service
technician. Force or attempted repair may result in
re or explosion.
• Do not use this appliance if any part has been
under water. Immediately call a qualied service
technician to inspect appliance and to replace any
part of control system and any gas control which
has been under water.
!
FOR YOUR SAFETY READ BEFORE OPERATING
CAUTION
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the re
department.
!
10.1 Boiler Sequence Of Operation
• With demand for heating, pump circulates water through
the primary circuit.
• Combustion fan will come on and begin to run at ignition
speed.
• Once fan reaches ignition speed control board will allow
power to ow to spark generator and gas valve creating
ignition in combustion chamber. Flame sensor will
acknowledge presence of ame in combustion chamber
and send signal to control board.
• Temperature sensor will send signal to control board
allowing control board to increase / decrease fan speed.
Combustion fan will in turn modulate gas rate accordingly.
• Once central heating loop temperature exceeds central
heating loop setpoint the unit will shutdown and go
through 3 minute time delay (burner pause time) before
another call for heat.
• During this time the pump will run for additional three
minutes to dissipate any residual heat.
240011947 REV B, [03/31/2018]