Lennox International Inc Lennox Merit Series Gas Furnace Upflow/Horizontal Air Discharge Danger

TABLE 3

OUTDOOR TERMINATION USAGE*

				STANDARD					CONCENTRIC
		Flush­	Wall Kit		Wall Ring	Kit
	Vent	Mount						1-1/2 inch	2 inch	3 inch
			2 inch	3 inch	2 inch
		Kit
Input Size	Pipe
							Field
	Dia. in.	51W11						71M80	69M29
				44J40			Fabricated
		(US)	22G44 (US)					(US)	(US)	60L46 (US)
				(US)	15F74
		51W12	430G28 (CA)					444W92	444W92	444W93 (CA)
				481J20 (CA)
		(CA)						(CA)	(CA)
	2	3YES	YES	1YES	1YES		5YES	2YES
045	2-1/2	3YES	YES	1YES	1YES		5YES	2YES
	3	3YES	YES	1YES	1YES		5YES	2YES
	2	3YES	YES	1YES	1YES		5YES	2YES
070	2-1/2	3YES	YES	1YES	1YES		5YES	2YES
	3	3YES	YES	1YES	1YES		5YES	2YES
	2	3YES		YES	YES		5YES		YES	YES
090	2-1/2	3YES		YES	YES		5YES		YES	YES
	3	3YES		YES	YES		5YES		YES	YES
	2	YES		YES	YES		5YES		YES	YES
110	2-1/2	YES		YES			5YES		YES	YES
	3	YES		YES			5YES		YES	YES
135	3	YES		YES			5YES			YES

NOTE - Standard Terminations do not include any vent pipe or elbows external to the structure. Any vent pipe or elbows external to the structure must be included in total vent length calculations. See vent length tables.

*Kits must be properly installed according to kit instructions.

1Requires field-provided outdoor 1-1/2” exhaust accelerator.

2Concentric kits 71M80 and 44W92 include 1-1/2” outdoor accelerator, when uses with 045 and 070 input models.

3Flush mount kits 51W11 and 51W12 includes 1-1/2 in. outdoor exhaust accelerator, required when used with 045, 070 and 090 input models.

4 Termination kits 30G28, 44W92, 4493 and 81J20 are certified to ULC S636 for use in Canada only. 5 See table 8 for vent accelerator requirements.

Joint Cementing Procedure

All cementing of joints should be done according to the specifications outlined in ASTM D 2855.

NOTE - A sheet metal screw may be used to secure the in­ take pipe to the connector, if desired. Use a drill or self tap­ ping screw to make a pilot hole.

DANGER

DANGER OF EXPLOSION!

Fumes from PVC glue may ignite during system check. Allow fumes to dissipate for at least 5 minutes before placing unit into operation.

1 - Measure and cut vent pipe to desired length.

2 - Debur and chamfer end of pipe, removing any ridges or rough edges. If end is not chamfered, edge of pipe may remove cement from fitting socket and result in a leaking joint.

3 - Clean and dry surfaces to be joined.

4 - Test fit joint and mark depth of fitting on outside of pipe.

5 - Uniformly apply a liberal coat of PVC primer for PVC or use a clean dry cloth for ABS to clean inside socket surface of fitting and male end of pipe to depth of fitting socket.

NOTE - Time is critical at this stage. Do not allow prim­ er to dry before applying cement.

6 - Promptly apply solvent cement to end of pipe and in­ side socket surface of fitting. Cement should be ap­ plied lightly but uniformly to inside of socket. Take care to keep excess cement out of socket. Apply second coat to end of pipe.

7 - Immediately after applying last coat of cement to pipe, and while both inside socket surface and end of pipe are wet with cement, forcefully insert end of pipe into socket until it bottoms out. Turn PVC pipe 1/4 turn dur­ ing assembly (but not after pipe is fully inserted) to dis­ tribute cement evenly. DO NOT turn ABS or cellular core pipe.

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