Dunkirk Excelsior EXB Series - Manual (Page 38)

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1. Inspect Installation Before Starting Burner.
A. Verify venting, water piping, oil piping, and
electrical system are installed properly. Refer to
installation Instructions contained in this manual.
B. Confirm all electrical, water and oil supplies
are turned off at source and vent is clear from
obstructions.
2. Fill Heating System With Water.
A. Failure to clean system can result in clogged air
vents, circulator damage and seized zone valves.
Clean heating system if boiler water is dirty. Refer to “18 -
Maintenance” on page 53 for proper cleaning instructions
for water boilers.
Fill entire heating system with water and vent air from
system.
Use following procedure on series loop or multi-zoned
system installed as per piping diagrams, to remove air
from system when filling:
A. Close shut off valve in boiler system piping
between air separator and vertical purge valve.
B. Isolate all zones by closing zone valves or shut-off
valves in supply and return of each zone(s).
C. Attach hose to vertical purge valve in boiler system
supply piping. Terminate hose in five gallon bucket
or suitable floor drain or outdoor area.
D. Starting with one zone at a time, open zone valve
or shut-off valve in boiler supply and return piping.
E. Open purge valve.
F. Open shut-off valve in cold water supply piping.
G. When zone is completely purged of air, close zone
valve or shut-off valve. Open valve to next zone
to be purged. Repeat this step until all zones have
been purged. At completion, open all valves.
H. Close purge valve, continue filling system until
pressure gauge reads 12 psi. Close shut-off valve
in cold water supply piping.
I. Open shut off valve in boiler system piping.
J. Remove hose from purge valve.
K. Confirm boiler and system have no water leaks.
L. It may be necessary to clean air vent assembly
after few days of operation.
3. Check controls, wiring and burner. Verify all
connections are tight and burner is rigid, all electrical
connections have been completed and fuses installed,
and oil tank is filled and oil lines have been tested.
15 - FILLING BOILER
WARNING
Fire, burn, asphyxiation hazard. Turn off service
switch to boiler to prevent accidental firing of
burner outside combustion chamber. Disconnect
burner power cord from wire harness in front jacket.
Tighten swing door fastener completely when
service is complete. Failure to follow instructions in
this manual and understand all requirements could
result in death or serious injury.
! NOTICE
Boiler maximum operating pressure is posted on
ASME data label located on front lower leg of boiler.
Never exceed this pressure. Do not plug relief
valve.