Bosch GWH 1600 P LP Specifications download pdf (Page 9)

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Installation instructions

3.6 Venting

B Minimum vent pipe diameter: 5 inches

B Minimum vertical vent height: 6 feet, with no elbows

B Establish 12 inch rise before any elbow

The heater must be vented to the outside following all

local ordinances and specifications for installing a gas

appliance vent or chimney. The heater must be located

as close as practicable to a vertically rising chimney or

vent that has a listed vent cap at its termination point.

The venting system must be designed and constructed

so as to develop a positive flow adequate to remove flue

gasses to the outdoors. Consult the National Fuel Gas

Code if the vent will have elbows or share venting with

another natural draft appliance.

3.6.1 Horizontal venting

A power vent (model AQ1), with a proof-of-draft safety

interlock device, is required and is available for sidewall

venting. Contact your dealer. In the Commonwealth of

Massachusetts power vented applications must utilize

proof-of-draft safety interlock device.

3.6.2 Vertical venting

B A 5 inch diameter gas vent constructed of double

wall Type B gas vent is required. A 6 inch vent is

required in elevations greater than 2000 feet, see

Fig. 10. Under no circumstances should the vent

pipe be reduced in size.

B An approved gas vent connector must be attached

to the top of the water heater and rise vertically at

least 12" before entering into an approved gas vent

connector elbow.

B The minimum vertical gas vent height allowed is 6

feet; horizontal vent connectors and elbows are not

to be considered in the total gas vent height.

B All gas vent sections must be secured to each other

with sheet metal screws and be properly supported.

Horizontal runs:

Any gas vent section that is greater than 45 degrees

from the vertical is considered horizontal. Horizontal

sections must slope upwards at least ¼ inch for every

foot of its horizontal length and be properly supported.

Keep the horizontal section short and avoid too many

elbows. The maximum horizontal run allowed is half of

the total vertical vent height; horizontal vent connectors

and elbows are not to be considered in the total gas

vent height.

Vent termination:

The gas vent constructed of double wall Type B gas

vent must terminate above the roof surface with a listed

vent cap at a height that's in accordance with Fig. 11

and table 2, provided they are at least 10 feet (2.4 m)

from a vertical wall or similar obstruction. All other gas

vents that are not able to terminate within the minimum

specified height allowed must terminate not less than 2

feet (0.6 m) above the highest point where it passes

through the roof and at least 2 feet (0.6 m) higher than

any vertical wall or similar obstruction within 10 feet (3.1

m).

Fig. 9 Flat roof

Fig. 10 Vent Adaptor for High Altitude Installations

Danger: Do not reduce the vent pipe

size. Do not put an elbow directly on top

of heater. Failure to follow venting

requirements may cause deadly exhaust

gases to enter living space.

Warning: Do not combination vent with

a mechanically vented appliance.

Warning: Horizontally venting to a

vertically constructed vent stack along

an outside wall of a building is not

permissible.

Warning: Horizontally venting to a

sidewall vent terminator (without power

vent) is not permissible.

LISTED VENT CAP

MINIMUM 6

FEET (1.8M)

LISTED GAS VENT

ESTABLISH A ONE

FOOT RISE BEFORE

ANY ELBOWS

5” X 6” ADAPTOR

USED ON HIGH

ALTITUDE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 27 28

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Bosch GWH 1600 P LP Specifications Page 9

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