CHAPTER4
SfARTING
AND OPERATING INSTRUCfiONS
the programmer to re-cycle normally for a new
lighting trial. Several efforts may be necessary to
"bleed" air from the line.
!WARNING
Do
not
repeat unsuccessful light-
Ing attempts
without
rechecking
the burner and
pilot adjustments.
Damage to. the
boiler
or
serious
personal
Injury
or
death
may
result.
NOTE: The burner and control system are
designed
to
provide
a
"pre-
purge" period
of
fan operation
prior
to
establishing
ignition
spark and pilot flame. Do not at
..
tempt to alter the system
or
~o
take
any action that might circumvent
this feature.
Once main flame
is
established, observe that it
is
extinguished promptly when the burner
is
shut
off. Flame may continue to bum for a second or
two after normal shutdown due to the gas remain-
ing downstream from the fuel valve.
If
the flame
continues to
bum
for a longer period or. during
blower motor spindown, immediately tum the
burner switch
off
and close the main gas cock.
Investigate and correct the cause
of
the valve
leakage before relighting the burner. The main
gas valve
is
tight seating provided nothing
prevents tight closure. Foreign material may be
present in either new
or
renovated gas lines un-
less adequate care
is
taken in cleaning and purg·
ing. ,
When the conditions covered above and in Sec-
tions
A, B and C
are
assured, the burner
is
ready
for
firing. Refer to Section H
of
this chapter for
further starting and operating information.
75()...150
H.
START-UP,
OPERATING
AND
SHUTDOWN
-ALLFUELS
Depending upon the fuel being burned, the ap-
plicable previous sections in this chapter should
be reviewed for preliminary instructions.
When firing with oil, make certain that the burner
gun
is
in its most forward position and latched
in
place (see Fig. 1-4). When frring with gas, the
burner gun should be properly withdrawn and
latched in place. The fuel selector switch should
be accordingly set to either "oil" or "gas."
Set the manual-automatic switch (Fig.l-7)
to
"manual" and tum the manual flame control
to
"close."
Tum the burner switch
to "on." The load demand
light should glow, and the low water level light
should remain out indicating a safe water level in
the boiler. The programmer will proceed through
the normal operating sequence.
(See Chapter 3
for sequence details.)
NOTE: On an initial starting attempt,
several efforts might
be
required
to accomplish
"bleeding"
of
fuel
lines, main or pilot.
If
ignition
does not then occur, do not repeat
unsuccessful attempts without
rechecking burner and pilot
ad-
justment.
On ignition failure, the flame failure light will
glow and the blower will purge the boiler
of
unburned fuel vapors before stopping. After ig·
nition failure, wait a few moments before re-set-
ting the lockout switch.
CHAPTER 4-9
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