CleaverBrooks 4WI, Operation, Service And Parts Manual

Page: 124 / 216

Inspection and Maintenance
8-6 750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
It is recommended that the boiler is off and cool when the glass is
replaced.
Check try-cocks and gauge cocks for freedom of operation and clean as
required. It is imperative that the gauge cocks are mounted in exact align-
ment. If they are not, the glass will be strained and may fail prematurely.
FIGURE 8-6.
Water Column Gauge Glass Replacement
8.5 — Electrical Controls
The operating controls should be inspected monthly. Examine tightness of electrical connections and keep the
controls clean. Remove any dust that accumulates in the interior of the control using low pressure air. Take care not
to damage the mechanism.
Be certain that controls are correctly leveled. The
internal piping leading to the pressure control actu-
ators should be cleaned, if necessary. Covers
should be left on controls at all times.
FIGURE 8-7.
Operating Controls
Dust and dirt can cause excessive wear and overheating of motor starter and relay contacts. Use a burnishing tool
or a hard surface paper to clean and polish contacts. Starter contacts are plated with silver and are not harmed by
discoloration and slight pitting. Replacement of the contacts is necessary only if the silver has worn thin.
Do not attempt to change the gauge glass while the boiler is in service.
Failure to follow these instructions could result in serious injury or
death.
Do not use files or abrasive materials such as sandpaper on the contact points. Failure to follow these instructions
could result in equipment damage.
! Warning
! Caution