Waterside Care and Requirements
3-6
750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
Special caution must be taken to guard against any condition, or combination of conditions, that might lead to the
transfer of cold water to a hot boiler or hot water to a cold boiler. It cannot be over-emphasized that rapid changes
in temperature within the boiler can, and sometimes do, cause damage.
3.2.2 — Steam Boiler
3.2.2.1 — Feed Pump Operation
Before turning on the pump motor be certain that all valves in the water feed line are open to prevent possible
damage to the feed pump mechanism. After opening the valves, momentarily energize the feed pump motor to
establish correct pump rotation. With the correct rotation established, close the boiler feed pump entrance switch.
The pump should shut down when the water level reaches the proper level.
Feedwater pumps must have adequate capacity to maintain required water level under all operating conditions.
Check the feedwater pumps periodically and maintain as necessary to prevent unexpected breakdowns.
3.2.2.2 — Water Feeder (optional) Operation
Water feeder operation is usually applicable to boilers operating at 15 psi steam or less. It is only necessary to open
the water supply line valve and the water feeder discharge valve.
3.3 — Water Treatment
Properly treated boiler feed water, coupled with good engineering and operating practices, lead to maximum effec-
tiveness and long trouble-free life of pressure vessels. Contact your local Cleaver-Brooks authorized representative
for information on how to prevent the presence of unwanted solids and corrosive gases.
Objectives of water treatment are:
1.
Prevent hard scale deposits or soft sludge deposits, which reduce heat transfer and can lead to overheated metal
and costly downtime and repairs.
2.
Eliminate corrosive gases in the supply or boiler water.
NOTE:
Prior to operating the pump, carefully check the alignment of the flexible coupling, if one is used. A properly
aligned coupling will last a long time and provide trouble-free mechanical operation.
NOTE:
In the event that water column isolation valves are provided or installed, it must be established that the valves
are open and seated or locked in the open position. If the valves are installed, it is illegal to operate the boiler with
closed or unsealed open valves.
The isolation valves and the water column piping must be locked open during operation. Failure to do so may result in
a low water condition. Failure to follow these instructions could result in serious injury or death.
!
Warning
Summary of Contents for 4WI
Page 46: ...Burner Operation and Control 2 22 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Page 62: ...Waterside Care and Requirements 3 16 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Page 70: ...Sequence of Operation 4 8 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Page 114: ...Adjustment Procedures 6 28 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
