Inspection and Maintenance
8-4
750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
The flue gas outlet and stack should be inspected annually and cleaned as necessary. Commercial firms are available
to perform the work. The stack should be inspected for damage and repaired as required.
The fireside should be thoroughly cleaned prior to any extended lay-up of the boiler. Depending upon circum-
stances, a protective coating may be required. See Section 3.9 in Chapter 3.
8.3 — Water Level Controls
The need to periodically check water level controls and the waterside of the pressure vessel cannot be overempha-
sized. Most instances of major boiler damage are the result of operating with low water, or the use of untreated (or
incorrectly) treated water.
Always be sure of the boiler water level. On steam boilers, the water column
should be blown down daily. Check samples of boiler water and condensate in
accordance with procedures recommended by your local Cleaver-Brooks autho-
rized representative. Refer to Sections 3.7 and 3.8
for blowdown instructions
and internal inspection procedures.
Since low-water cutoff devices are generally set by the original manufacturer, no
attempt should be made to adjust these controls to alter the point of low-water
cutoff or point of pump cut-in or cut-out. If a low-water device should become
erratic in operation, or if its setting changes from previously established levels,
contact your local Cleaver-Brooks authorized representative.
FIGURE 8-3.
Low Water Cutoff
8.3.1 — Steam Boiler
The instructions on the low water cutoff plate on a steam boiler should be followed in accordance with a definite
schedule.The controls normally function for long periods of time, which may lead to laxity in testing on the
assumption that normal operation will continue indefinitely.
FIGURE 8-4.
Replica of Low Water Cutoff Plate
Safe operation of your boiler demands periodic inspection and maintenance of all low
water cut-off devices. Open and inspect them at least once a month. Check operation
frequently by stopping water flow to the boiler, allowing water level to lower. If
controls do not cut off burner at proper safe water level or the internal wiring/
switches appear in poor physical condition, repair or replace at once.
!
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...
