Market Forge Industries M24E24A, Инструкция по установке, эксплуатации, техническому обслуживанию и каталог запасных частей, Страница: 8 / 31

SETTING THE BOILER CONTROL PRESSURE SWITCHES:
PRESSURE CONTROL SWITCH ADJUSTMENT :
If boiler fails to maintain steam pressure in operating range, pressure control switch may require
adjustment.
Start boiler and allow pressure to build up to operating level - 7 PSI (
1kg/cm² ).
Check boiler pressure gauge. If gauge indicates 5 to 7 PSI, pressure control switches
are properly adjusted.
If boiler does not come on when pressure gauge reads 7 PSI and does not go off when
pressure gauge reads 7 PSI, proceed as follows:
WARNING:
Because power must be on to adjust pressure switches, be sure to protect against
electrical shock.
Remove screw and lift front cover off control box.
Hand adjust operating pressure control switch and high limit pressure control switch by
turning adjusting nut (Knurled knob) clockwise to raise and counter clockwise to lower
actuation point. Switch should be set so that boiler comes on when boiler pressure
gauge reads 5 PSI and goes off when gauge reads 7 PSI. Switch should be set so that
boiler will shut off if pressure reaches 15 PSI.
The actuation value (differential) is factory set and cannot be changed.
The cold water condensor thermostat is preset at factory.
Repeat steps, 1, 2, and 3. If 5 to 7 PSI boiler pressure gauge reading is obtained dur
-
ing boiler operation, adjustment is correct. If proper adjustment cannot be made con
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sult Trouble-Shooting Guide in this manual.
After making adjustments, replace cover on pressure switch box and screw.
1.
2.
3.
a)
b)
c)
d)
e)
f)
ADJUSTMENTS
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