Lochinvar WH 55-399 Requirements for installation in Canada, Sizing, Model, Kit Number, Length

3 General venting

Requirements for installation in Canada

1.Installations must be made with a vent pipe system certified 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. For concentric vent installations, the inner vent tube must be replaced with field supplied certifiedvent material to comply with this requirement.

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.

Sizing

The Knight boiler uses model specific combustion air intake and vent piping sizes as detailed in Table 3A below.

Table 3A Air Intake/Vent Piping Sizes

Model	2" Max Vent/	3" Max Vent/	4" Max Vent/
	Air	Air	Air
55	*80 feet	100 feet	N/A
85	*50 feet	100 feet	N/A
110	*40 feet	100 feet	N/A
155	N/A	100 feet	N/A
199	N/A	100 feet	N/A
285	N/A	*50 feet	100 feet
399	N/A	N/A	100 feet

Installation & Operation Manual

Note: The minimum combustion air and vent piping length is 12 equivalent feet.

When determining equivalent combustion air and vent length, add 5 feet for each 90° elbow and 3 feet for each 45° elbow.

EXAMPLE: 20 feet of PVC pipe + (4) 90° elbows + (2) 45° elbows + (1) concentric vent kit (CVK3003) = 49 equivalent feet of piping.

NOTICE	The appliance output rating will reduce
	by up to 1.5% for each 25 feet of vent
	length.

Table 3B Concentric Vent Kit Equivalent Vent Lengths

Model	Kit Number	Equivalent Vent
		Length
55 - 110	CVK3008	3 feet
155 - 199	CVK3003	3 feet
285 - 399	CVK3007	3 feet

*￿ WARNING

NOTICE

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.

Increasing or decreasing combustion air or vent piping sizes is not authorized.

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