John-wood Polaris High-Efficiency Gas User Manual download pdf (Page 8)

Vent Pipe Material

Combustion Air Inlet Piping; The following plastic

materials may be used for combustion air inlet piping.

IMPORTANT: Follow all local codes or, in the absence

of local codes, CSA B149.1, Natural Gas and Propane

Installation Code - current edition to properly install air inlet

piping.

• Schedule 40 PVC

• Schedule 40 or 80 CPVC

• DWV Pipe and Foam Core Piping is

acceptable as intake pipe only.

Exhaust Piping; Exhaust PVC or CPVC plastic piping

shall be certified and marked as complying to Standard

for Type BH Gas Venting System ULC-S636. In addition

plastic piping, plastic components, primers, and glues must

be from a single source manufacturer and not mixed with

other listed or unlisted systems. IMPORTANT: Follow all

local codes or, in the absence of local codes, CSA B149.1,

Natural Gas and Propane Installation Code - current

edition to properly install exhaust piping.

Important: Do not use vent elbows in this vent pipe instal-

lation (see figure 5 below).

Vent Pipe Installation

The following guidelines should be followed when installing

the air inlet and exhaust outlet piping:

• Venting should be as direct as possible with a minimum

number of pipe fittings.

• Vent diameter must not be reduced unless specifically

noted in the installation instructions.

• All 2” horizontal vent piping must be sloped upward

1/4 inch per foot (21 mm per meter); (3” Piping must

slope upward at 1/8” per foot) (10.5 mm per meter).

This will allow condensate to run back to the heater

and exit through the condensate trap.

• Support all horizontal pipe runs every four feet (1.2 m)

and all vertical pipe runs every six feet (1.8 m) or

according to local codes.

• Vents run through unconditioned spaces where below

freezing temperatures are expected should be properly

insulated to prevent freezing. For horizontal runs, wrap

the vent pipe with nationally recognized/listed heat tape

and/or approved insulation for freeze protection. Install

per the manufacturer’s instructions.

• An air intake filter is included with the unit and must be

installed according to the installation instructions

supplied with the filter.

The combustion air inlet and exhaust outlet piping and

termination may be installed in one of the following type

terminations:

1. Standard Horizontal (2 Pipe)

2. Alternate Horizontal (2 Pipe)

3. Vertical (2 Pipe)

4. Concentric Vent - Through the Wall

5. Concentric Vent - Through the Roof

All pipe, fittings, pipe cement, primers and procedures

must conform to American National Standard Institute and

American Society for Testing and Materials (ANSI/ASTM)

standards in the United States. This water heater has been

design certified by the Canadian Standards Association for

use with the specified (CSA) listed plastic vent pipe.

All joints in the inlet and outlet piping must be properly

cemented. Size and cut all piping before cementing.

1. Cut the pipe end square and remove all ragged edges

and burrs. Make sure the inside of the pipe is clean

and free of cuttings and loose dirt. Chamfer the end

and apply primer to the fitting and pipe.

2. Using a suitable grade of pipe cement, apply a moder-

ate, even coat inside the fitting. Apply a liberal amount

of cement to the outside of the pipe to socket depth.

Note: It is important to select the proper pipe cement for

the type of plastic pipe being used.

3. Assemble the parts quickly while the cement is

still wet. Twist the pipe 1/4 turn during insertion

and hold for 30 seconds.

Vent Pipe Length

Size the exhaust outlet and combustion air inlet pipes as

specified in Table 1. This table lists the maximum allow-

able length in feet of the exhaust outlet and combustion air

inlet pipes as related to the number of required elbows and

the termination. The specified maximum lengths are for

the separate inlet and exhaust pipe systems and not the

combined length of both systems. Minimum pipe length is

6 feet (1.8 m) with one elbow per side.

1. Determine termination type and pipe size.

2. Determine number of elbows in exhaust pipe. Do not

include the elbows in the termination or the condensate

trap. Corresponding number Indicates the maximum

length of exhaust pipe.

3. Determine number of elbows in inlet pipe. Do not

include the elbows in the termination. The correspond-

ing number indicates the maximum length of inlet pipe.

Pipe

Size in

Inches

(15.8)

(14.6)

(12.2)

(13.4)

(9.7)

100

(30.5)

125

(38.1)

(11)

(13.4)

(12.2)

(11)

(9.7)

(8.5)

(7.3)

(14.6)

(15.8)

(13.4)

(12.2)

(11)

(9.7)

(8.5)

(15.8)

(14.6)

(13.4)

(12.2)

(11)

(9.7)

130

(39.6)

120

(36.6)

115

(35)

110

(33.5)

105

(32)

115

(35)

110

(33.5)

105

(32)

100

(30.5)

(27.4)

(28.9)

120

(36.6)

115

(35)

110

(33.5)

105

(32)

100

(30.5)

(28.9)

125

(38.1)

120

(36.6)

115

(35)

110

(33.5)

105

(32)

100

(30.5)

Maximim allowable Length in Feet (Meters) of Exhaust and Air Inlet Pipe

For Schedule 40 CPVC, OR PVC Pipe and Fittings

Minimum length is 6 feet (1.8 m) per pipe with 1 elbow per side.

* 3” pipe must be used for 175,000 BTU/Hr (51.29 kW) input and above.

2 Inch pipe may be used with 100,000, 130,000 & 150,000

BTU/HR (29.3, 38, & 43.9 kW) input models only.

Figure 5: Correct and Incorrect Pipe Fittings

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 63 64

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John-wood Polaris High-Efficiency Gas User Manual Page 8

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