Cleaver-Brooks CBW - Feed Pump Operation; Pressure Temperature Chart for Hot Water Boilers; Steam Boiler

CHAPTERl
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THE PRESSURE VESSEL
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(FIGURE 2·2/ PRESSURE-TEMPERATURE CHART FOR HOT WATER BOILERS]
water for the normal system load (as an example,
boilers equipped with coils for domestic hot
water).
It cannot
be over-emphasized that rapid changes
in temperature within the boiler can, and some-
times do, cause damage.
2. Steam Boiler
Feed Pump Operation
Make certain that all valves in the water feed line
are open
BEFORE turning on the pump motor
to prevent possible damage to the feed pump
mechanism. After opening the valves, momen-
tarily energize the feed pump motor
to establish
the correct pump rotation. With the correct rota-
750-150
tion established, close the boiler feed pump
entrance switch. The pump should shut down
when the boiler water level reaches the proper
level shown in Fig. 2-3.
Feedwater pumps must have adequate capacity
to maintain the required water level under all
operating conditions. Check the feedwater
pumps periodically and maintain as necessary to
prevent unexpected breakdowns.
NOTE: Prior to operating the pump, care-
fully check the alignment
of the
flexible coupling
if one is used. A
properly aligned coupling will
last longer and provide
trouble-
free mechanical operation.
CHAPTER 2-5