Install Instructions

Pre-Installation Items
Boiler Replacement
If the CHALLENGER is replacing an existing
boiler, the following items should be checked
and corrected prior to installation:
- Boiler piping leaks and corrosion.
- Proper location and sizing of the expan-
sion tank on the boiler heating loop.
- If applicable, amount and quality of
propylene glycol.
- Vent condition
Clearances
The CHALLENGER is approved for follow-
ing clearance to combustibles:
- Top panel - 12 inches [30.5 cm]
- Front - 0 inches
- Bottom panel - 12 inches [30.5 cm]
- Rear - 0 inches
- Right side - 4 inches [10.2 cm]
- Left side - 1.5 inches [3.8 cm]
- Boiler Piping - 0.25 inches [0.6 cm]
- Reference the appropriate vent supple-
ment for venting clearance requirements.
To provide serviceability to the appli-
ance it is recommended that the follow-
ing clearances be maintained:
Top panel - 24 inches [61 cm].
Front - 24 inches [61 cm].
Bottom panel - 24 inches [61 cm].
Rear - 0 inches
Sides - 6 inches [15.2 cm]
When maintaining the approved clear-
ance or less than recommended service
clearances, some product labeling may
become hidden and unreadable.
If the enclosure in which the appliance is
installed is less than 45 cubic feet [1.3
m
3
], the space must be ventilated. See
page 8 Ventilation Air Requirements for
guidelines and requirements.
When installing the CHALLENGER in a
confined space, sufficient air must be pro-
vided to allow, under normal operating con-
ditions, proper air flow around the product
to maintain ambient temperatures within
safe limits to comply with the National Fuel
Gas Code NFPA 54 - Standard.
Residential Garage Installations
When installing the CHALLENGER in a resi-
dential garage, the following special precautions
per NFPA 54/ANSI Z223.1 must be taken:
- Mount the appliance a minimum 18 inch-
es [458 mm] above the floor level of the
garage. Ensure the burner and ignition
devices / controls are no less than 18
inches [458 mm] above the floor level.
- Locate or protect the appliance in a
manner so it cannot be damaged by a
moving vehicle.
BEST PRACTICE
NOTICE
WARNING
WARNING
5