Install Instructions

17
3 General venting (continued)
Installation & Operation Manual
Requirements for installation in
Canada
1. Installations must be made with a vent pipe system
certifi ed to ULC-S636.
2. The fi rst three (3) feet of plastic vent pipe from the
appliance fl ue outlet must be readily accessible for visual
inspection.
3. The components of the certifi ed vent system must not be
interchanged with other vent systems or unlisted
pipe/fi ttings. For concentric vent installations, the inner
vent tube must be replaced with fi eld supplied certifi ed vent
material to comply with this requirement.
4. The 4" Concentric Vent Kit available from Lochinvar (see
Section 4 – Sidewall Termination – Optional Concentric
Vent) and the 4" Concentric Vent Kit available from IPEX
are both approved for use on the Knight XL (400 - 601
models only) boiler. Both kits are listed to the ULC-S636
standard for use in Canada.
The appliance output rating will reduce
by up to 1.5% for each 25 feet of vent
length.
NOTICE
Sizing
Increasing or decreasing combustion air
or vent piping sizes is not authorized.
NOTICE
Model Air Intake Vent
400 - 601 4 inches (102 mm) 4 inches (102 mm)
701 - 801 4 inches (102 mm) 6 inches (152 mm)
The Knight XL uses model specifi c combustion air intake and
vent piping sizes as detailed in Table 3A below.
Table 3A Air Intake/Vent Piping Sizes
Model Kit Number
Equivalent
Vent Length
400 CVK3007 5 Feet (1.5 m)
501 CVK3007 30 Feet (9 m)
601 CVK3007 30 Feet (9 m)
Table 3B Concentric Vent Kit Equivalent Vent Lengths
Minimum / Maximum allowable
combustion air and vent piping lengths
are as follows:
Combustion Air = 12 equivalent feet (3.7 m) minimum /
100 equivalent feet (30.5 m) maximum
Vent = 12 equivalent feet (3.7 m) minimum / 100 equivalent
feet (30.5 m) maximum
When determining equivalent combustion air and vent
length, add 5 feet (1.5m) for each 90° elbow and 3 feet (.9 m)
for each 45° elbow.
EXAMPLE: 20 feet (6 m) of PVC pipe + (3) 90° elbows +
(3) 45° elbows + (1) concentric vent kit (CVK3007) = 49
equivalent feet (15 m) of piping.