4
2. Pre-Installation Items
When maintaining the approved clearance but 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 m3], the space must be ventilated.
See Ventilation Air Requirements, Section 3.2 for guide-
lines and requirements.
When installing the CHALLENGER in a confined space,
sufficient air must be provided to allow, under normal
operating conditions, proper air flow around the product
to maintain ambient temperatures within safe limits to
comply with the National Fuel Gas Code (NFPA 54/ANSI
Z223.1)
2.5 Residential Garage Installations
When installing the CHALLENGER in a residential garage, the
following special precautions per NFPA 54/ANSI Z223.1 must be
taken:
Mount the appliance a minimum 18 inches [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.
NOTICE
WARNING
WARNING
2.6 Boiler Freeze Protection Feature
The boiler control has a freeze protection feature. This feature
monitors the boiler supply water temperature and responds as
follows when no call for heat is present:
42°F [6°C]
Boiler Circulator and Burner are ON.
•
50°F [10°]
Boiler Circulator and Burner are OFF.
•
The boiler freeze protection feature is disabled during a
hard lockout. The burner will not fire, but the CH circula-
tor will operate.
The boiler freeze protection feature is designed to pro-
tect the boiler installed in a primary/secondary piping
arrangement. See Section V for primary/secondary pip-
ing examples. See Section X for antifreeze guidelines.
CAUTION
CAUTION
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