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R-2065
Qualified Installing Agency
Installation and replacement of gas piping, gas utilization equipment or
accessories and repair and servicing of equipment shall be performed only
by a qualified agency. The term “qualified agency” means any individual,
firm, corporation, or company which whether in person or through a
representative is engaged in and is responsible for (a) the installation or
replacement of gas piping or (b) the connection, installation, repair or
servicing of equipment, who is experienced in such work, familiar with
all precautions required and has complied with all the requirements of the
authority having jurisdiction.
The installation must conform to local codes or, in the absence of local
codes, with the National Fuel Gas Code, ANSI Z223.1 */Canadian
Installation Code, CAN/CGA B149.
*Available from the American National Standards Institute, Inc., 11 West 42nd St.,
New York, NY 10036.
Locating and Venting the Room Heater
Clearances: When facing the front of the room heater the minimum
clearances to combustible construction (material) are the following:
Right side 6 inches (152mm). Left side 6 inches (152mm).
Recommend 18 inches (457mm) on left side for servicing.
Do not install in alcove or closet. No horizontal projection above heater
permitted within 48 inches (122cm).
Ceiling 48 inches (122cm). Rear of draft hood 2 inches (51mm).
Open in front to provide service, access, and clearance to combustibles.
Venting
1. Flue pipe must be as large as the flue collar on the draft diverter.
2. Maintain an upward slope of at least 1/4 inch (6mm) per foot (.3m)
of horizontal run.
3. Run flue pipe as directly as possible with a minimum of elbows.
4. Flue pipe should extend through the wall of a chimney to be flush
with inner wall.
5. Flue pipe must be adequately supported by metal strips.
6. Single wall vent pipe may be attached directly to the draft hood of
the room heater when a clearance of 2 1/2 inches (64mm) is
maintained between the single wall vent pipe and the combustible
wall of the room in which the room heater is located. Use double wall
vent pipe for clearances less than 2 1/2 inches (64mm) to combus-
tibles.
7. For flue pipe running through walls and roof, use B-1 [1 inch (25mm)
clearance to combustibles) vent pipe.
8. Chimneys should extend at least 2 feet (.6m) above the roof and
above any object or nearby building within 10 feet (3m).
9. Open tees should not be used in the flue pipe.
10. Appliance must not be connected to a chimney flue that is servicing
a separate solid-fuel burning appliance.
For proper venting, do not attach a 90
°
elbow directly to draft diverter.
If possible, attach 2 feet (.6m) of straight vent pipe before an elbow is
used. Use 45
°
elbows if possible.
Uninsulated single-wall metal pipe shall not be used outdoors in cold
climates for venting gas utilization equipment.
Ventilation and Combustion Air
Room heaters shall be installed in a location in which the facilities for
ventilation permit satisfactory combustion of gas and proper venting
under normal conditions. In buildings of conventional frame, brick or
stone construction without tight storm windows and doors, infiltration is
normally adequate to provide for combustion and draft hood dilution.
Where appliances are installed in a confined space within a building, the
building being of unusually tight construction, air for combustion and
ventilation must be obtained directly from outdoors or from such spaces
that freely communicate with the outdoors. Under these conditions, the
confined space shall be provided with two permanent openings, one near
the top of the enclosure and one near the bottom; each opening shall have
a free area of not less than one square inch (6.5cm
2
)per 1,000 BTU’s
(.3KW/H) of total input. The draft hood must be in the same atmospheric
pressure zone as the combustion air inlet to the appliance.
Gas Supply
Check all local codes for requirements, especially for the size and type of
gas supply line required. On Natural gas lines less than 15' (4.6m) long,
use 1/2" (13mm) pipe; on longer runs, use 3/4" (19mm) iron pipe or equal.
On LP gas lines please consult LP gas supplier.
Installing a New Main Gas Cock
Each appliance should have its own manual gas cock.
A manual main gas cock should be located in the vicinity of the unit.
Where none exists, or where its size or location is not adequate, contact
your local authorized installer for installation or relocation.
Compounds used on threaded joints of gas piping shall be resistant to the
action of liquefied petroleum gases. The gas lines must be checked for
leaks by the installer. This should be done with a soap solution, watching
for bubbles on all exposed connections and, if unexposed, a pressure test
should be made.
Never Use an Exposed Flame to Check for Leaks.
Appliance must be disconnected from piping at inlet of control valve
and pipe capped or plugged for pressure test. Never Pressure Test
With Appliance Connected; Control Valve Will Sustain Damage!
A gas valve and ground joint union should be installed in the gas line
upstream of the gas control to aid in servicing. It is required by the
National Fuel Gas Code that a drip line be installed near the gas inlet. This
should consist of a vertical length of pipe, tee connected into the gas line,
that is capped on the bottom in which condensation and foreign particles
may collect.
Method of Installing A Tee Fitting Sediment Trap
The use of the following gas connectors is recommended:
—
ANS Z21.24 Appliance Connectors of Corrugated Metal Tubing
and Fittings
—
ANS Z21.45 Assembled Flexible Appliance Connectors of Other
Than All-Metal Construction
The above connectors may be used if acceptable by the authority having
jurisdiction.
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a 1/8" (3mm) N.P.T.
plugged tapping, accessible for the test gauge connection, must be
placed immediately upstream of the gas supply connection to the
appliance.
2. The appliance, and its individual shutoff valve, must be disconnected
from the gas supply piping system during any pressure testing of
that system at test pressures in excess of 1/2 psig (3.5kPa).
3. The appliance must be isolated from the gas supply piping system by
closing its individual manual shutoff valve during any pressure
testing of the gas supply piping system at test pressures equal to or less
than 1/2 psig (3.5kPa).