8
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 fluids in boiler water causing
system and boiler to freeze and leak.
• Debris left from existing piping, if not flushed and
cleaned with an appropriate cleaner.
6. Check around the boiler for any potential air
contaminants that could risk corrosion to the boiler
or the boiler combustion air supply (see Table 1A).
Prevent combustion air contamination. Remove any of
these contaminants from the boiler area.
⚠
WARNING
Provide clearances:
Clearances from combustible materials
1. Hot water pipes—at least 1/4" (6 mm) from combustible
materials.
2. Vent pipe – Follow special vent system manufacturer’s
instructions.
3. See FIG.’s 1-1 and 1-2 for other clearance minimums.
Recommended clearances for service access
- Front / Top / Rear................................................................ 24"
Closet and alcove installations
This appliance requires a special venting
system. The vent connection to the appliance
For closet and alcove installations as shown
in FIG.’s 1-1 and 1-2, CPVC or stainless steel
⚠
WARNING
⚠
WARNING
NOTICE
⚠
WARNING
1
Determine boiler location
A closet is any room the boiler is installed in which is less than
26 cubic feet for KBX400-500 models, 35 cubic feet for KBX650-
800 models, and 39 cubic feet for KBX1000 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.
Installation & Operation Manual
Unless specified as an outdoor boiler, this
appliance is certified as an indoor appliance.
DO NOT install units in rooms or
environments that contain corrosive
contaminants (see Table 1A). Failure to
comply could result in severe personal
injury, death, or substantial property
damage.
⚠
WARNING
If you do not provide the recommended
service clearances shown, it may not be
NOTICE
DO NOT install the boiler in a room likely to freeze.
Multiple appliances can be installed side by
side with no clearances between adjacent
NOTICE
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.
appliances because the appliances are approved for zero
clearances from combustible surfaces; however, service access
will be limited from the sides. Consult with the local inspection
authority for approval.
possible to service the boiler without removing it from the
space.
must be made with the starter CPVC/stainless steel pipe section.
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.
Do not install the appliance outdoors or locate where the
appliance will be exposed to freezing temperatures or to
temperatures that exceed 100°F.
Do not install the appliance where the relative humidity may
exceed 93%. Do not install the appliance where condensation
may form on the inside or outside of the appliance, or where
condensation may fall onto the appliance.
Failure to install the appliance indoors could result in severe
personal injury, death, or substantial property damage.
