CSA 96MDT SERIES Page 47 Installation Instructions Manual Download

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such as Armaflex or Rubatex insulation may also be
used as long as there is no heat tape applied to the
vent pipe. For horizontal runs where water may collect,
wrap the vent pipe with self-regulating 3 watt or 6 watt
heat tape. The heat tape must be U.L. listed and in-
stalled per the manufacturer’s instructions.

NOTE:

Never cover heat tape with insulation.

5. The minimum vent pipe length is 5 feet [1.5m].

IMPORTANT:

No part of the combustion air and/or

vent pipes may be installed underground.

7. Piping at a roof, wall or other penetration must be im-

mobilized to prevent pipes from disconnecting. Discon-
nected pipes may allow flue products to be released
inside the structure.

8. For Direct Vent systems, all pipe penetrations through

roof or sidewall must be installed so that the vent and
combustion air intake pipes terminate in the same at-
mospheric pressure zone.

9. Vent terminations must be installed with the minimum

clearances specified in the TERMINATION REQUIRE-
MENTS sections of this manual and

Figure 21

(for

Non-Direct Vent) and

Figure 32

(for direct Vent instal-

lations).

10. Piping external to the structure (excluding approved

venting terminations) and vent passing through un-
heated crawl-spaces, attics, verandas, patios or decks
must be insulated with approved insulating material to
prevent freezing as required for local climate.

JOINING PIPE AND FITTINGS

All pipe, fittings, solvent cement, primers and procedures
must be installed following the vent manufacturer’s installa-
tion instructions and must conform to American National
Standards Institute and American Society for Testing Mate-
rials (ANSI/ASTM) standards as shown in the

Table 2

below:

CEMENTING JOINTS

Properly seal all joints in the PVC vent using the following
materials and procedures.

PVC CLEANER-PRIMER AND PVC
MEDIUM-BODY SOLVENT CEMENT

IMPORTANT:

After cutting pipe, remove all ragged edges

and burrs. This is important to prevent reduction in pres-
sure drop throughout the system.

1. Cut pipe end square. Chamfer edge of pipe. Clean fit-

ting socket and pipe joint area of all dirt, grease and
moisture.

2. After checking pipe and socket for proper fit, wipe

socket and pipe with cleaner-primer. Apply a liberal
coat of primer to inside surface of socket and outside of
pipe. Read instructions included with the primer for
proper application.

3. Apply a thin coat of cement evenly within the socket.

Quickly apply a heavy coat of cement to the pipe end
and insert pipe into the fitting with a slight twisting
movement until it bottoms out.

NOTE:

Cement must be fluid. If not, re-coat.

4. Hold the pipe in the fitting for 30 seconds to prevent the

tapered socket from pushing the pipe out of the fitting.

5. Wipe all excess cement from the joint with a rag. Allow

15 minutes before handling. Cure time varies accord-
ing to fit, temperature and humidity.

NOTE:

Stir the solvent cement frequently while using. Use

a natural bristle brush or the dauber supplied with the can.
The proper brush size is one inch.

IMPORTANT:

For proper installation:

DO NOT

use solvent cement that has become curdled,

lumpy or thickened.

DO NOT

thin. Observe shelf precautions printed on

containers. For applications below 32°F, use only low-
temperature type solvent cement.

VENTING & COMBUSTION AIR REQUIREMENTS (cont.)

GENERAL VENTING REQUIREMENTS AND

GUIDELINES

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For Canadian installations all exhaust venting materials must be certified to
ULCS-636C.

(U.S. Only)

WARNING

PVC/CPVC SOLVENT CEMENTS AND PRIMERS
ARE HIGHLY FLAMMABLE. PROVIDE ADEQUATE
VENTILATION AND DO NOT ASSEMBLE NEAR A
HEAT SOURCE OR AN OPEN FLAME. DO NOT
SMOKE. AVOID SKIN OR EYE CONTACT. OB-
SERVE ALL CAUTIONS AND WARNINGS PRINTED
ON MATERIAL CONTAINERS. FAILURE TO FOL-
LOW THESE GUIDELINES MAY RESULT IN FIRE,
EXPLOSION OR ASPHYXIATION CAUSING PER-
SONAL INJURY OR DEATH.

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