Instruction Manual
SEP/02/2008/TUE 08:19 AM
UTC TECH PUB
FAK No, 31 7 240 5662
P. 01
PRESSURE LIMIT CONTROL
(St0am Boilers Only)
'This control will shnt off the gas supply to the bur
ners in the event that the steam pressure in the
boiler reaches the *'cut-out” setting. It will also
permit gas flow to the burners when the steam pres
sure drops to the “cuHn"* setting. The range be
tween these two settings is called the *'differen
tial”. The cut-out pressure is equal to the cut-in
pressure setting plus the differential.
LOW WATER CUT-OFF
(Steam Boilers Only)
This control operates to shut off the gas supply to
the burner in the event that the water line in the
boiler drops to a low level. It also permits ga^ flow *
to the burners when sufficient water is ^dded to the
boiler, either by opening a water valve manually or
be an electric water feeder.
ftlbUCTI IN PIPE SIZE
^NOT TO BE MADE BEFORE HERE.
£" PIPE
Racomm ended
steam Heoder
proportions for
70, 105, 140.
Under no circum-
otoncofi should the
risers he reduced
in six* before the
first horizontal
run.
' 'Re'coinmefi'dSd''
8t*am heoder
proportions for
175, 210.
Under no circtitn-
stances should tl
risers be reducec
in size before th<
first horizontal
run.
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