Maytag HRN31250P User Manual

Page 25

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25

4” and 3” PVC, ABS or CPVC Schedule 40 piping and fittings
are acceptable materials for vent system on all 75 gallon
70,000 and 75,000 BTU/HR models and must be supplied
locally.

FIGURE 46.

ALL 40 AND 50 GALLON 40,000 BTU/HR MODELS -
OPTIONAL 2” VENT PIPING

2” PVC, ABS or CPVC Schedule 40 vent piping:

A wire screen to fit 2” PVC, ABS or CPVC Schedule 40 - 45

o

vent cap is supplied with the water heater.

A 3” PVC, ABS or CPVC Schedule 40 pipe, minimum length
of 3” (must be supplied locally), to make vent connection at
the blower outlet.

A 3” to 2” PVC, ABS or CPVC Schedule 40 reducer (must be
supplied locally).

2” and 3” PVC, ABS or CPVC Schedule 40 piping and fittings
are acceptable materials for the vent system on all 40 and
50 gallon 40,000 BTU/HR models and must be supplied
locally.

FIGURE 47.

The water heater requires its own (separate) venting
system.

It cannot be connected to existing vent piping or chimney.

It must terminate vertically to the outdoors.

Typical installation(s) in next column.

Refer to “Cementing PVC, ABS or CPVC pipe and fittings”
on page 23 and “Connecting Vent to Blower” on page 24.

FIGURE 48.

The total vertical and horizontal vent runs cannot exceed the
maximum length with the number of 90

o

elbows as specified

in the tables to follow. If more elbows are required, the venting
distance must be reduced 5 feet for every 90

o

elbow.

75 GALLON 70,000 AND 75,000 BTU/HR MODELS ONLY

3” DIA. VENT

NUMBER OF

MAX. LENGTH (FT.)

90

o

ELBOWS*

70

1

65

2

60

3

55

4

50

5

45

6

75 GALLON 70,000 AND 75,000 BTU/HR MODELS ONLY -

OPTIONAL 4” VENT PIPING

4” DIA. VENT

NUMBER OF

MAX. LENGTH (FT.)

90

o

ELBOWS*

110

1

105

2

100

3

95

4

90

5

85

6

ALL 40 AND 50 GALLON 40,000 BTH/HR MODELS ONLY

3” DIA. VENT

NUMBER OF

MAX. LENGTH (FT.)

90

o

ELBOWS*

115

1

110

2

105

3

100

4

95

5

90

6

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