CHAPTER4
SI' ARTING
AND
OPERATING INSTRUCfiONS
NOTE: The temperatures listed are tenta-
tive. The composition
of
the
fuel
oil
in
a given grade can vary
necessitating a higher or lower
preheating temperature. The
vis
..
cosity
of
the
oil at the nozzle
should
be less than 300 SSU
and
preferably less than 150 SSU.
The
actual
temperature
of
the oil
at
the burner should
be
deter-
mined
by
flame appearance
and
good combustion based on a
stack analysis.
See Chapter 5 for
additional information.
aose
the
manual by-pass valve after temperature
rise on
the
fuel oil controller thermometer is
noted. Make certain that hot oil
is
moving
through the controller. The orifice gate valve
must
~lso
be closed.
If
te~pe~ture
drops, open
the
onfice gate valve unul a nse is noted then
close
it.
· '
Once the correct setting
of
the
heater thermostats
h~
been
~tablished,
set
the
low
oil temperature
SWitch
(Ftgs. 1-2 and 1-8) at a point approximate·
ly
30• lower than the normal operating tempera-
ture.
H the system
is
equipped with a high
oil
te~per:tu!e
switch, this should be set
to
open
at
20
-30 higher than normal operating tempera-
ture.
Starting - When
all
the conditions covered
above
and
in
Sections A,
B,
C and D are assured
the
b~mer
is
ready for firing. Refer to Section H
?f
thiS
c~apter
for further starting
and
operating
mformation.
G.
FIRING
PREPARATIONS
FOR
GAS
(SERIES
200-400-700)
Prior to initial starting, check
the
linkage attached
to the gas butterfly valve
to
see that movement
is
free
from binding.
CHAPTER 4-8
Verify
the
presence
and
availability
of
gas.
On
a
new
installation., representatives
of
the gas utility
should be present when gas first flows
into
the
system
to
supervise purging
of
the new gas line
unless they already have done so.
Determine that the pilot
is
operating properly
as
outlin~
in
Section C
of
this chapter.
Determine that sufficient pressure exists
at
the
~tranC:C
to
the
gas train. This can be done
by
tnstalhng a
te·st
gauge downstream
of
the
regulator.
The gas pressure regulator must
be adjusted to
the
proper pressure level. Since this regulator
is
generally supplied
by
others, adjustment should
proceed according
to
instructions supplied
by
its
manufacturer.
It
is
necessary for
the
operator
to
know
the
burner
~quirem~nts
in
gas quantity
and
pressure. This
tnformatton can generally be found on the
Dimension Diagram (DO) supplied
by
Cleaver-
Brooks
for
the
specific installation. Should this
information not
be
read.ily
available, consult
the
a~ver-~rooks
Service Department, giving
the
botler senal number. Chapter 5 contains addi-
tional infonnation along with standard gas
flow
and
pressure requirements. This section should
be
completely reviewed prior
to
start·up.
H the burner
is
a combination fuel model, set
the
gas/oil switch
to
"gas." Withdraw
the
oil
burner
gun and latch
it
in
its
rearward position.
On
initial start-up,
it
is
recommended that
the
main gas shut-off cock (Fig. 1-3) remain closed
until
the
programmer
has
cycled through pre-
purge
and
pilot sequences. When the
fuel
valve
lig~tt
on the control panel comes on, observe
the
action
of
the
motorized
gas
valve stem
to
deter·
m~n~
that
it
opens when energized.
As
soon
as
thiS
IS
confirmed, tum
the
burner switch
"off'
and
let the.programmer finish its cycle. Check
to
see
that
the
gas valve
has
closed. Again tum
the
burner "on"
and
when
the
fuel
valve light glows
slowly open
the
main gas cock. The main flame
should ignite unless there
is
air present
in
the
line.
If
the flame
is
not established within about 5
seconds, tum
the
burner switch
"off'
and
allow
750-150
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