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1.9 BURNERS AND GAS TRAIN - FORCED DRAFT BOILERS
GENERAL
Refer to separate manual on the forced draft
burner for start-up and adjustment procedures.
Do not attempt to start burner when excess oil
has accumulated, or when the combustion
chamber is full of gas, or if chamber is very hot.
FUEL CONNECTIONS
Gas supply connections must comply with the
National Fuel Gas Code (NFPA54). Oil supply
connections must comply with NFPA31. Any
additional local or state codes must also be
adhered to.
Oil supply lines must be sized for the circulation
rate of the burner pump. This is referred to as the
suction gear capacity of the pump. If a transfer
pump is used, it must have a pumping capacity
no less than the total suction gear capacity of all
burner pumps on the system. Refer to Burner
Manual for the suction gear capacity of standard
oil pumps. Two-pipe oil systems are
recommended in all cases, although a one-pipe
system might be acceptable on smaller boilers
(under 6 gph). Two-pipe systems tend to have
fewer problems with air entrainment in the oil. Air
in the oil will cause nuisance problems and
delayed ignition.
1.10 PROCEDURES TO BE FOLLOWED BEFORE PLACING BOILER IN
OPERATION
1.10.1 HYDROSTATIC TEST OF BOILERS AND
SYSTEM
After completing the boiler and burner installation,
the boiler connections, fittings, attachments and
adjacent piping must be inspected for leaks by
filling the unit with water. The pressure should be
gradually increased to a pressure just below the
setting of boiler safety relief valve(s).
Remove the boiler tube access panels (see
dimensional drawing in this manual). Inspect the
tube to header joints to be certain that all tube
fittings are sealed. This is necessary because,
although the boiler is hydrostatically tested at the
factory, minor leaks in fittings and at attachments
can develop from shipping vibration or from
installation procedures. It is often necessary to
retighten such fittings after the installation and
after the boiler has been operated for some time.
Replace tube access panels before proceeding to
start boiler.
1.10.2 TEST OF GAS PIPING
Reference gas system test under Section 1.5,
"Gas Connection", in this manual.