Lochinvar KNIGHT WH 55 - 399 - Manual (Page 16)

16
Installation & Operation Manual
3
General venting
PVC/CPVC Vent piping materials
Use only the materials listed in Table 3A for
vent pipe, and fittings. Failure to comply
could result in severe personal injury, death,
or substantial property damage.
Installation must comply with local
requirements and with the National Fuel
Gas Code, ANSI Z223.1 for U.S. installations
or CSA B149.1 for Canadian installations.
Install vent and combustion air piping
ƽ DANGER
The Knight wall mount boiler must be
vented and supplied with combustion and
ventilation air as described in this section.
Ensure the vent and air piping and the
combustion air supply comply with these
instructions regarding vent system, air
system, and combustion air quality. See also
Section 1 of this manual.
Inspect finished vent and air piping
thoroughly to ensure all are airtight and
comply with the instructions provided and
with all requirements of applicable codes.
Failure to provide a properly installed vent
and air system will cause severe personal
injury or death.
All PVC vent pipes must be glued, properly
supported, and the exhaust must be pitched
a minimum of a 1/4 inch per foot back to
the boiler (to allow drainage of condensate).
ƽ WARNING
NOTICE
ƽ WARNING
ƽ WARNING
For closet and alcove installations, CPVC or
stainless steel material MUST BE used in a
closet/alcove structure. Failure to follow this
warning could result in fire, personal injury,
or death.
NOTICE
Requirements for installation in
Canada
1. Installations must be made with a vent pipe system
certified to ULC-S636.
IPEX is an approved vent manufacturer in Canada
supplying vent material listed to ULC-S636.
2. The first three (3) feet of plastic vent pipe from the
appliance flue outlet must be readily accessible for visual
inspection.
3. The components of the certified vent system must not be
interchanged with other vent systems or unlisted
pipe/fittings.
4. The 2" and 3" Concentric Vent Kits available from
Lochinvar (see Section 4 – Sidewall Termination – Optional
Concentric Vent) and the 2" and 3" Concentric Vent Kits
available from IPEX are approved for use on the Knight
wall mount boiler. Both kits are listed to the ULC-S636
standard for use in Canada.
For Models 55, 85, and 110 using 2" venting
and Model 285 using 3" venting, the first
seven (7) equivalent feet of vent must be
CPVC (field supplied). This includes any
transition piece used to increase or decrease
the vent diameter. See examples below.
ƽ WARNING
Examples: 1. Seven (7) feet vertical
2. Connector + 90° elbow + 2 feet horizontal
3. One (1) foot vertical + 90° elbow + 1 foot
horizontal
This appliance requires a special venting
system. For stainless steel venting use
an adapter from Table 3B (page 19)
that corresponds with the intended vent
manufacturer to be used. The field provided
vent fittings must be cemented to the CPVC
pipe section using an “All Purpose Cement”
suitable for PVC and CPVC pipe. 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.
Installing vent and air piping
Improper installation of PVC or CPVC
systems may result in injury or death.
ƽ CAUTION
Use only cleaners, primers, and solvents that
are approved for the materials which are
joined together.
NOTICE
1. Work from the boiler to vent or air termination. Do not
exceed the lengths given in this manual for the air or vent
piping.
2. Cut pipe to the required lengths and deburr the inside and
outside of the pipe ends.
3. Chamfer outside of each pipe end to ensure even cement
distribution when joining.
4. Clean all pipe ends and fittings using a clean dry rag.
(Moisture will retard curing and dirt or grease will prevent
adhesion.)
ƽ WARNING Insulation should not be used on PVC
or CPVC venting materials. The use of
insulation will cause increased vent wall
temperatures, which could result in vent
pipe failure.