Dunkirk XEB-4 - Checking and Adjusting; Gas Valve Safety Shutdown Test; Pilot and Main Burner Adjustment

26
STARTING YOUR BOILER
HOW A HOT - WATER SYSTEM OPERATES
Your entire heating system (boiler, piping and
radiation units) is lled with water. As the water in
the boiler is heated, it is pumped from the top of
the boiler through the supply main to the radiation
units. The cooler water in them ows back through
the return main to the boiler. This provides positive
and rapid response to the thermostat.
FILLING SYSTEM WITH WATER
Close the Air Vents on all radiation units. Open the
Valves to these units. Make sure the boiler and
Expansion Tank Drain Cocks are closed. The Air
Bleed Screw on the tank Drain Fitting should be
closed. Open the valve in the line from the boiler
to the expansion tank. Open the water inlet to
your boiler and leave it open. Start with the lowest
radiation unit. Open the air vent on this unit. When
all the air has escaped and water starts to ow
from the vent, close it. Go to the next radiation
unit, and repeat this process. Repeat until you
have covered every radiation unit in the system
(ending up at the highest unit in the system). If your
units have automatic vents, this manual venting is
unnecessary but it will speed up the proper lling
of your system.
If your system is a closed expansion tank system,
you may have an Automatic Fill Valve. You may
leave it open to rell the system automatically
as needed. Check the temperature-pressure
gauge. Note the position of the hand indicating
pressure. This should be between 10 and 15 lbs.
Any lowering of this movable hand below 10 lbs.
will indicate loss of water due to leakage. The
automatic ll valve should compensate for this.
Instructions are packaged with the valve.
!
!
WARNING
Never run water into a hot empty boiler.
1. This appliance is equipped with an ignition
device which automatically lights the
burner. Do not attempt to light the burner
by hand.
!
WARNING: If you do not follow these
instructions exactly, re or explosion
may result with property damage,
personal injury, or loss of life.
2. BEFORE OPERATING smell all around
the appliance area for gas. Be sure to
smell next to the oor because some gas
is heavier than air and will settle on the
oor.
!
WARNING: IF YOU SMELL GAS:
*Do not attempt to operate any appliance,
do not touch any electrical switch, do
not use the phone.
*Leave the building immediately and call
your gas supplier.
*If your gas supplier cannot be reached,
call the re department.
3.
!
WARNING: When turning or
depressing the gas control knob, use
only your hand to push down or turn
the knob. Never use tools. If the knob
will not operate by hand, the control
must be replaced by a qualied service
technician. Force or attempted repair
may result in a re or explosion.
4.
!
WARNING: If any part of this appliance
has been under water, do not operate.
Immediately call a qualified service
technician to inspect the appliance and
to replace any part of the gas control
system which has been under water.
FOR YOUR SAFETY
READ THIS BEFORE OPERATING