Install Instructions

34
110839-01 - 8/20
AP-U
Installation & Service Manual
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 10-1)
1. CLEAN THE FIRETUBES
a. Disconnect electric to burner and remove
stack.
b. For access to the firetubes, 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 firetube brush clean firetubes. 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 10-1: Cleaning of AP-U Boiler
10 Boiler Cleaning
Table 10-2
Boiler Model Dimension “X”
AP-110U-N(T) 13 3/8
AP-154U-N(T) 19 7/8