Emberglow OVM21NG Guide d'installation télécharger pdf (Page 6)

3. Add the Btu/Hr of all fuel burning appliances in the

space.

Vent-free log set _______________ Btu/Hr

Gas water heater* ______________ Btu/Hr

Gas furnace ___________________ Btu/Hr

Vented gas heater ______________ Btu/Hr

Gas ﬁreplace logs ______________ Btu/Hr

Other gas appliances* + ________ Btu/Hr

Total = ________ Btu/Hr

* Do not include direct-vent gas appliances. Direct-vent

draws combustion air from the outdoors and vents to

the outdoors.

Example:

Vent-free log set ______________ Btu/Hr

Gas water heater* _____________ Btu/Hr

Total = ________ Btu/Hr

Compare the maximum Btu/Hr the space can support with

the actual amount of Btu/Hr used.

____ Btu/Hr (max. the space can support)

____ Btu/Hr (actual amt. of Btu/Hr used)

Example: 63,300 Btu/Hr (maximum the space can sup-

port)

73,000 Btu/Hr (actual amount of Btu/Hr used)

The space in the above example is a conﬁned space because

the actual Btu/Hr used is more than the maximum Btu/Hr

the space can support. You must provide additional fresh

air. Your options are as follows:

Rework work sheet, adding the space of an adjoining room

If the extra space provides an unconﬁned space, remove

door to adjoining room or add ventilation grills between

rooms. See Ventilation Air from Inside Building, page 5.

B. Vent room directly to the outdoors. See Ventilation Air

from Outdoors, page 5.

C. Install a lower Btu/Hr appliance, if lower Btu/Hr

size

makes room unconﬁned.

If the actual Btu/Hr used is less than the maximum Btu/Hr

the space can support, the space is an unconﬁned space.

You will need no additional fresh air ventilation.

39,000

40,000

79,000

AIR FOR COMBUSTION

AND VENTILATION

WARNING: If the area in which the

heater may be operated does not meet the

required volume for indoor combustion

air, combustion and ventilation air shall be

provided by one of the methods described

in the National Fuel Gas Code, ANSI Z223.1/

NFPA 54, the International Fuel Gas Code,

or applicable local codes.

CONTINUED

VENTED OPERATION

Note:

When used as a vented heater, appliance must be

installed only in a solid-fuel burning fireplace with a

working flue and constructed of noncombustible mat-

erial.

Chimney Minimum Permanent

Height (ft.) Flue Opening (sq. ins.)

6' to 15' 39 sq. inches

15' to 30' 29 sq. inches

Area of Various Standard

Round Flues

Diameter (ins.) Area (sq. ins.)

5" 20 sq. inches

6" 29 sq. inches

7" 39 sq. inches

8" 51 sq. inches

You may also use this heater as a vented product. There are.

three reasons for operating your heater in the vented mode.

1. The fireplace does not meet the clearance to com-

bustibles requirements for vent-free operation.

2. State or local codes do not permit vent-free operation.

3. You prefer vented operation.

If reasons number 1 or 2 above apply to you, you must per-

manently open chimney flue damper. You must install the

damper clamp. This will insure vented operation (see Fig-

u r e 10). The damper clamp will keep damper open.

See chart below for minimum permanent flue opening

you must provide. Attach damper clamp so the mini-

mum permanentflue opening will be maintained at all times.

Follow instructions Installing Damper Clamp on

page 8 for location of damper in the fireplace.

Damper

Clamp

Damper

The National Fuel Gas Code, A N S

I Z223.1/NFPA 54 defines a confined space as a space

space whose volume is less than 50 ft

3 per 1000btu/hr (4.8 m3 per kw) of the aggregate

input of all appliances installed in that space. Rooms communicating directly with the

space in which the appliances are installed, through openings not furnished with doors

are considered a part of the unconfined space.

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Emberglow OVM21NG Guide d'installation Page 6

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