Lochinvar 51 operation manual PVC/CPVC air intake/vent connections, Air inlet pipe materials, Make

Installation & Operation Manual

3General venting (continued)

5.Dry fit vent or air piping to ensure proper fit up before assembling any joint. The pipe should go a third to two-thirds into the fitting to ensure proper sealing after cement is applied.

6.Priming and Cementing:

a.Handle fittings and pipes carefully to prevent contamination of surfaces.

b.Apply a liberal even coat of primer to the fitting socket.

c.Apply a liberal even coat of primer to the pipe end to approximately 1/2" beyond the socket depth.

d.Apply a second primer coat to the fitting socket.

Table 3A Vent Pipe, and Fittings

e.While primer is still wet, apply an even coat of approved cement to the pipe equal to the depth of the fitting socket.

f.While primer is still wet, apply an even coat of approved cement to the fitting socket.

g.Apply a second coat of cement to the pipe.

h.While the cement is still wet, insert the pipe into the fitting, if possible twist the pipe a 1/4 turn as you insert it. NOTE: If voids are present, sufficient cement was not applied and joint could be defective.

i.Wipe excess cement from the joint removing ring or beads as it will needlessly soften the pipe.

All vent pipe materials and fittings must comply with the following:

Item	Material	Standards for installation in:
		United States	Canada
	PVC schedule 40	ANSI/ASTM D1785	CPVC and PVC venting must be ULC-
			S636 Certified. IPEX is an approved
	PVC-DWV	ANSI/ASTM D2665
Vent pipe and fittings			manufacturer in Canada supplying vent
	CPVC schedule 40/80	ANSI/ASTM F441
			material listed to ULC-S636.
	AL29-4C	UL1738	ULC-S636
Pipe cement/primer	PVC	ANSI/ASTM D2564	IPEX System 636
	CPVC	ANSI/ASTM F493	Cements & Primers
	NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE
	Approved Stainless Steel Vent Manufacturers
	Make		Model
ProTech Systems (Simpson Dura-Vent Co.)			FasNSeal Vent / FasNSeal Flex* Vent
Z-Flex (Nova Flex Group)			Z-Vent
Heat Fab (Selkirk Corporation)			Saf-T Vent

*Use of FasNSeal Flex smooth inner wall vent is to be used in vertical or near vertical sections only, taking precaution to ensure no sagging occurs of the vent system. Connect to the FasNSeal rigid vent using specially designed adapters and sealing method, see manufacturer’s instructions.

PVC/CPVC air intake/vent connections

1.Combustion Air Intake Connector (FIG. 3-9) - Used to provide combustion air directly to the unit from outdoors. A fitting is provided on the unit for final connection. Combustion air piping must be supported per guidelines listed in the National Mechanical Code, Section 305, Table 305.4 or as local codes dictate.

2.Vent Connector (FIG. 3-9) - Used to provide a passageway for conveying combustion gases to the outside. A transition fitting is provided on the unit for final connection. Vent piping must be supported per the National Building Code, Section 305, Table 305.4 or as local codes dictate.

Air inlet pipe materials:

The air inlet pipe(s) must be sealed. Choose acceptable combustion air inlet pipe materials from the following list:

PVC, CPVC or ABS

Dryer Vent or Sealed Flexible Duct (not recommended for rooftop air inlet)

Galvanized steel vent pipe with joints and seams sealed as specified in this section.

Type “B” double-wall vent with joints and seams sealed as specified in this section.

AL29-4C, stainless steel material to be sealed to specification of its manufacturer.

*Plastic pipe may require an adapter (not provided) to transition between the air inlet connection on the appliance and the plastic air inlet pipe.

Figure 3-9Near Boiler PVC/CPVC Venting

VENT

AIR

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