RU130EP Installation and Operation Manual

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Rinnai Tankless Water Heater Installation and Operation Manual 38

Concentric Pipe: Installation

Instructions

1. Remove and discard screw from concentric

ue connection.

2. Remove exhaust adapter ring (discard for

concentric venting congurations.)

3. Install the concentric vent. Ensure it is properly

seated.

4. Secure the vent pipe to the concentric ue

connection with the supplied screw.

Concentric

Vent

Mount Concentric Pipe Through Wall

If venting through an exterior wall, align the wall

mounting bracket template (located in literature

bag) to the wall and follow instructions on the

template for appropriate vent hole location. Use

a level to make sure the wall mounting bracket is

even and level.

Wall Mounting

Bracket Template

Level

Wall Mounting

Bracket

Table 13: Concentric Pipe: Vent Applications

Horizontal Wall Terminations

2 in. x 4 in.

3 in. x 5 in.

Vertical Roof

Terminations

2 in. x 4 in.

and

3 in. x 5 in.

Table 14: Concentric Pipe: Maximum Vent Length

Concentric Vent Maximum Equivalent Length

Vent Sizes 2 in. x 4 in. 3 in. x 5 in.

Vent Lengths 65 ft (20 m) 150 ft (46 m)

• 45° elbow is equivalent to 3 ft (1 m)

• 90° elbow is equivalent to 6 ft (2 m)

Figure 29

Figure 26

Figure 27

Figure 28

Figure 30

Install the venting termination according to the

diagrams and instructions in this manual. Slope

the venting 1/4 in. per foot toward the appliance

according to the vent manufacturer’s installation

instructions. Dispose of condensate per local

codes.

IMPORTANT

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Installation and Operation Manual - Page 38