0 mechanical (cont’d), 2 venting and combustion air (cont’d), Vent pipe combustion air pipe – Reznor UEAS Unit Installation Manual User Manual

Page 14: 1 vent/combustion air requirements (cont’d)

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Model

UEAS

Attach installer-provided PVC tee

to the 4” vent pipe outlet.

Balance of the vent may be either

horizontal or vertical. Slope a

horizontal run downward slightly

toward the vent condensate drain

at the heater.

Field-supplied Fittings

as needed for 1/2” or

larger condensate drain

Both the vent condensate drain and the heat exchanger condensate drain require a trap and must go

into a sanitary drain. (See Paragraph 7.3, pages 25-26, for requirements on installing the condensate drain.)

All vent and drain parts in this illustration are field supplied.

THIS PVC PIPING ARRANGEMENT APPLIES TO ALL

CANADIAN INSTALLATIONS. In Canada, all PVC vent pipe must

be approved to ULC S636. All venting and drain parts in this

illustration are field supplied. This is an acceptable

alternate PVC piping arrangement for installations

in the United States.

FIGURE 9B -

CANADIAN

OR U.S.

INSTALLATION

Horizontal or

Vertical Vent

showing Where

to Install the

Condensate

Drain

Connection in

the Horizontal

Vent Run

7.2.1.5 Combustion

Air Pipe Diameter and

Length

Minimum length of pipe between the heater and the concentric adapter box is

3 ft (914mm). The minimum/maximum requirements of the length of vent pipe

that extends outdoors are different for horizontal and vertical vent terminals. See

instructions for Option CC2 or Option CC6.

Diameter and Length of the Combustion Air Inlet Pipe

Model UEAS 130, 180, 260, 310

Diameter

Length

Section From Heater to Concentric

Adapter Box

6"

Same as Vent Pipe

(152mm)

Section From Concentric Adapter

Box to Outdoors

8"

See Instructions for Option CC2,

pages 21-24, or CC6, pages 18-21.

(203mm)

Vent Pipe Diameter and Maximum Vent Pipe Length from Heater to

Terminal End for Vertical and Horizontal Vent

Model

UEAS

Vent Pipe

Diameter

Maximum Vent

Pipe Length

Equivalent Straight Length for a

90° Sweep Elbow*

45° Elbow

inches

mm

feet

M

feet

M

feet

M

130, 180,

260, 310

4

102

50

15.2

8

2.4

4

1.2

* All 90° elbows in the vent system must be sweep type.

7.2.1.4 Vent Pipe

Diameter and Length

7.2.1.6 Joints

Provide pipes and fittings in type specified in Paragraph 7.2.1.1, page 12.

When

ready to install the vent system, follow the instructions below to make joints.

Vent Pipe

Combustion Air Pipe

Secure slip-fit joints of single-wall combustion air pipe with sheetmetal screws or

rivets. Seal joints and seams with aluminium tape or silicone sealant.
The Schedule 40 PVC or CPVC vent system should be installed in a manner

consistent with normal industry standards and in compliance with all local fire and

building code requirements. Failure to follow proper installation practices, proce-

dures, or techniques can result in system failure, property damage, or personal

injury. The installer is responsible for the installation. Read all of the procedures

below before beginning installation. Make joints one at a time as pipe and fitting

should be assembled quickly while cement is fluid.
1. Cut the pipe square. An angled cut may result in joint failure.

Remove burrs using a deburring tool, a file, or a knife edge. Remove all burrs

from the inside and outside diameter of the cut end of the pipe. Chamfer (bevel)

the end of the pipe 10° to 15°.

b) Use a clean dry cloth to remove surface dirt, grease, and moisture from the

pipe sections and fittings.

7.0 Mechanical

(cont’d)

7.2.1 Vent/Combustion Air Requirements (cont’d)

7.2 Venting and Combustion Air (cont’d)

Form I-UEAS, Page 14

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