AERCO Esteem O&M Manual - Manual (Page 11)

5
Boiler Replacement
Boiler Replacement
If the Esteem 399 Low NOx is replacing an
existing boiler, the following items should be
checked and corrected prior to installation:
• Boiler piping leaks and corrosion.
• Improper location and sizing of the
expansion tank on the boiler heating
loop.
• If applicable, level and quality of freeze
protection within the boiler system.
See Warning on ”Handling Previously Fired
Combustion Chamber Insulation” on page 67
Recommended Clearances
The Esteem 399 Low NOx is approved for
zero clearance to combustibles, excluding
vent and boiler piping.
• Boiler Piping - 1/4 inch from combustible
materials.
• See Concentric Vent System Installation
Supplement GF-125V for vent clearance
requirements.
To provide service access to the unit it is rec-
ommended that the following clearances be
maintained:
Top jacket 24 inches [610 mm].
Front 24 inches [610 mm].
Rear 0 inches
Sides 6 inches [153 mm]
Bottom piping 24 inches [610 mm].
WARNING
I
F THE CLEARANCES LISTED ABOVE CANNOT BE
MAINTAINED OR THE ENCLOSURE IN WHICH THE
BOILER IS INSTALLED IS LESS THAN
85
CUBIC
FEET
,
THE SPACE MUST BE VENTILATED
. S
EEP
-
AGE
8
FOR REQUIREMENTS
.
GF-125