User Guide

38
X: BOILER CLEANING
NOTICE
BURNER SHUTDOWN: Open Service Switch
to turn off burner.
Manual Oil Supply Valve should be closed and
Electric Service to boiler turned off if boiler will
not be operated for an extended period of time.
A. GENERAL. Inspection service and cleaning should
be conducted annually. Turn off electric power and
close oil supply valve while conducting service or
maintenance.
B. FIRETUBES AND COMBUSTION CHAMBER. (See
Figure 26)
1. CLEAN THE FIRETUBES
a. Disconnect electric to burner and remove stack.
b. For access to the retubes, pull top jacket panel
off. Remove brass nuts, that hold canopy down.
Without taking off carriage bolts, pull canopy
off.
c. Remove turbulators.
d. Using a retube brush clean retubes. DO NOT
extend brush past the end of the bottom
tubesheet.
e. Assemble the boiler in reverse order.
Units should be cleaned at least once a year, preferably
at the end of each heating season.
It is not necessary to remove burner to clean boiler.
Brush, scrape, or vacuum from top.
Figure 26: Cleaning of AP-U Boiler