Hearth & Home Technologies GNBC30 User Manual

12-02

34615 Rev G

NOVUS B-VENT INSTALLATION INSTRUCTIONS

Roof Pitch

H (Min.) Ft.

Flat to 6/12 ................................................ 1.0

6/12 to 7/12 ............................................... 1.25

Over 7/12 to 8/12 ...................................... 1.5

Over 8/12 to 9/12 ...................................... 2.0

Over 9/12 to 10/12 .................................... 2.5

Over 10/12 to 11/12 .................................. 3.25

Over 11/12 to 12/12 .................................. 4.0

Over 12/12 to 14/12 .................................. 5.0

Over 14/12 to 16/12 .................................. 6.0

Over 16/12 to 18/12 .................................. 7.0

Over 18/12 to 20/12 .................................. 7.5

Over 20/12 to 21/12 .................................. 8.0

Figure 7

Vent Height for Vertical Termination

5. CHECK VENTING SYSTEM

Check the venting system to assure proper operation.

This can be done with a match while the appliance is

operating.

Hold a lighted match at the bottom edge of the draft hood

opening. If the flames and smoke remain upright,

ventilation is acceptable. If the flames and smoke are

drawn into the draft hood, this means ventilation is good.

If the flames and smoke are forced away from the draft

hood, this may indicate a ventilation blockage or down

draft resulting in gas spillage into the home. If this occurs,

turn off the appliance and do not burn it until it has been

inspected by a qualified service person. See Figure 8.

Vent Height

6. INSTALLING AN OUTSIDE AIR KIT (STRONGLY

RECOMMENDED)

An outside air kit should be purchased as a feature

with this appliance. An outside air kit helps to decrease

the amount of room air taken by utilizing outside air for

combustion. Figure 9 illustrates two of many possible

methods that can be used to supply outside air to the

appliance.

A maximum of 40 of air kit ducting is allowed. The air

kit must terminate at least one foot below the venting

termination and must terminate to the outside.

Figure 8

Testing Ventilation

WARNING!

Exhaust products of gasoline engines are hazard-

ous. The outside air must not be taken from a ga-

rage space, attic spaces, basements or above the

roofing where other heating appliances, fans or

chimneys exhaust or utilize air.

TABLE 1

Note:

The outside air kit can terminate at any level with

the exception that it must terminate at least one foot be-

low the vent termination cap. The outside air kit inlet

thimble should be positioned at least four feet above the

ground level in a manner that will not allow snow, leaves,

etc. to block the inlet.