Rheem 95 Direct Vent Indoor Series Use and Care Manual - Page 9

The water heater must be installed with a 3”/5” diameter UL approved Category III Concentric Stainless

Steel appliance concentric vent pipe or Rheem approved concentric vent pipe.

Venting

The installation of venting must comply

with national codes, local codes and the

vent manufacturer’s instructions.

The water heater must be vented to the

outdoors as described in these instructions.

DO NOT

connect this water heater to a

chimney. It must be vented separately from

all other appliances.

All concentric vent components (adapters,

pipe, elbows, terminals, etc.) should be

Rheem approved Stainless Steel Venting

Material

(e.g. AL29°4C).

The specified vent termination must be used.

(Refer to pages 13 and 14 for an example of

the concentric vent.)

Use the screws provided to connect

the concentric vent pipe with the anti°

disconnection joint.

The unit can be vented either horizontally

or vertically.

Concentric vent pipe runs must be

adequately supported along both horizontal

and vertical runs.

The maximum recommended unsupported

span should be no more than five (5) feet

(1.5 m). Support isolation hanging bands

should be used.

DO NOT

use wire. (See

diagram)

Notes on pre±existing vent:

If the water heater is being installed as a

replacement for an existing water heater, a

thorough inspection of the existing venting

and air intake system must be performed

prior to any installation work. Verify that the

correct materials, vent lengths and terminal

locations as detailed in this Use and Care

Manual have been met. Carefully inspect the

entire venting and air intake system for any

signs of cracks or fractures, particularly at

the joints between elbows or other fittings

and the straight runs of vent pipe. Check the

system for signs of sagging or other stresses

in the joints as a result of misalignment of

any components in the system. If any of

these

conditions are found, they must be

corrected in accordance with the venting

instructions in this manual before completing

the installation and putting the water heater

into service.

See the back page of this manual

for additional requirements for the

Commonwealth of Massachusetts.

DANGER: Failure to

install the appliance vent

adapter and properly vent the

water heater to the outdoors

as outlined in the Venting

section of this manual will

result in unsafe operation of

the water heater, causing death,

serious injury, explosion,

or fire. To avoid the risk

of fire, explosion, or

asphyxiation from carbon

monoxide, NEVER operate the

water heater unless it is

properly vented and has

adequate air supply for proper

operation as outlined in the

Venting section of this manual.

WARNING: Use only 3”/5”

UL approved Category III

Concentric Stainless Steel vent

material or Rheem approved

concentric vent material. No

other vent material is

permitted.

WARNING: Follow

concentric vent

manufacturer’s installation

instructions and their

recommended clearances to

combustibles.

NO!

YES!

Venting Lengths

MAXIMUM VENT LENGTH:

The system will not operate if there is

excessive restriction (pressure drop) in the

venting system. A maximum 39’

(12.0 m)

of

vent pipe may be used provided there is only

one 90± elbow in the system. If additional

elbows are required: two elbows can be used

with 37’ 6"

(11.5 m)

, three elbows can be used

with

36’ (11.0 m)

or four elbows can be used

with 34

’ 6"

(10.5 m) of vent pipe. (See table)

A 94± elbow is equivalent to 1’6” (.5 m) of

straight pipe. A 45± elbow is equivalent to

9” (.25 m) of straight pipe.

The vent termination does not count

in equivalent to pipe calculation when

determining total vent lengths.

The vent should be installed with a slight

downward slope of 1/4” per foot of

horizontal run toward the vent terminal (see

diagram). This ensures that any condensate

formed during operation of the unit is

evacuated from the appliance and to prevent

rain from entering the appliance.

An upward slope toward the vent terminal is

not acceptable for horizontal venting without

installing the drain tube to the condensation

trap. For horizontal installation with less

than 10’ (3.1m), a 94± elbow is required.

MINIMUM VENT LENGTH

: The venting

may be as short as 12” (30cm), in addition

to installation of one 94± elbow and one

vent termination to the outdoors through a

side wall (Total equivalent vent length: 30”

(76cm)).

Notice:

Make sure that the seam of the inner

vent pipe in horizontal runs is toward the top

of the installation (see diagram).

Vent Seam

Number of

90± elbows

(bends)

Maximum

Length of

Straight Pipe

1

39’

(12.0 m)

2

37' 6"

(11.5 m)

3

36"

(11.0 m)

4

34' 6"

(10.5 m)

5

33'

(10.0 m)

6

31'6"

(9.5 m)

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Rheem 95 Direct Vent Indoor Series Use and Care Manual - Page 9

Venting, Venting Lengths

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