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Installation & Operation Manual
The Knight XL gas manifold and controls
met safe lighting and other performance
criteria when the boiler underwent tests
specified in ANSI Z21.13 – latest edition.
Failure to keep boiler area clear and free of
combustible materials, gasoline, and other
flammable liquids and vapors can result in
severe personal injury, death, or
substantial property damage.
Installation must comply with:
• Local, state, provincial, and national codes, laws,
regulations, and ordinances.
• National Fuel Gas Code, ANSI Z223.1 – latest edition.
• Standard for Controls and Safety Devices for
Automatically Fired Boilers, ANSI/ASME CSD-1, when
required.
• National Electrical Code.
• For Canada only: B149.1 Installation Code, CSA C22.1
Canadian Electrical Code Part 1 and any local codes.
Before locating the boiler, check:
1. Check for nearby connection to:
• System water piping
• Venting connections
• Gas supply piping
• Electrical power
2. Locate the appliance so that if water connections should
leak, water damage will not occur. When such locations
cannot be avoided, it is recommended that a suitable
drain pan, adequately drained, be installed under the
appliance. The pan must not restrict combustion air
flow. Under no circumstances is the manufacturer to be
held responsible for water damage in connection with
this appliance, or any of its components.
3. Check area around the boiler. Remove any combustible
materials, gasoline and other flammable liquids.
4. The Knight XL must be installed so that gas control
system components are protected from dripping or
spraying water or rain during operation or service.
5. If a new boiler will replace an existing boiler, check for
and correct system problems, such as:
• System leaks causing oxygen corrosion or heat
exchanger cracks from hard water deposits.
• Incorrectly-sized expansion tank.
• Lack of freeze protection in boiler water causing system
and boiler to freeze and leak.
ƽ WARNING
This appliance is certified as an indoor
appliance. Do not install the appliance
outdoors or locate where the appliance will
be exposed to freezing temperatures or to
temperatures that exceed 100°F (37.8°C).
Failure to install the appliance indoors could
result in severe personal injury, death, or
substantial property damage.
Provide clearances:
Clearances from combustible materials
1. Hot water pipes—at least 1" (25 mm) from combustible
materials.
2. Vent pipe – at least 1" (25 mm) from combustible materials.
3. See FIG.’s 1-1 and 1-2 on page 9 for other clearance
minimums.
Clearances for service access
1. See FIG.’s 1-1 and 1-2 on page 9 for recommended
service clearances. If you do not provide the minimum
clearances shown, it may not be possible to service the
boiler without removing it from the space.
Closet and alcove installations
This appliance requires a special venting
system. The vent connection to the
appliance must be made with the starter
CPVC/stainless steel pipe section provided
with the appliance. The field provided PVC
vent fittings must be cemented to the CPVC
pipe section. Use only the vent materials,
primer and cement specified in this manual
to make the vent connections. Failure to
follow this warning could result in fire,
personal injury, or death.
For closet and alcove installations as shown
in FIG.’s 1-1 and 1-2, CPVC or stainless steel
vent material must be used inside the
structure. The ventilating air openings
shown in FIG.’s 1-1 and 1-2 are required for
this arrangement. Failure to follow this
warning could result in fire, personal injury,
or death.
ƽ WARNING
ƽ WARNING
NOTICE
ƽ WARNING
1 Determine boiler location
A closet is any room the boiler is installed in which is less than
171 cubic feet for KBN399 models, 193 cubic feet for KBN500
models, 223 cubic feet for KBN600 models, 247 cubic feet for
KBN700 models and 278 cubic feet for KBN800 models.
An alcove is any room which meets the criteria for a closet with
the exception that it does not have a door.
Example: Room dimensions = 5 feet long, 4 feet wide, and
8 foot ceiling = 5 x 4 x 8 = 160 cubic feet. This would be
considered a closet for a Knight XL Boiler.