Specifications

5
VENTING
This heater shall not be installed in a confined space unless
provisions are provided for adequate combustion and ventilation
air.
The National Fuel Gas Code defines a confined space as a space
whose volume is less than 50 cubic feet per 1,000 Btu per hour
(4.8m
3
) of the aggregate input rating of all appliances installed in
that space and an unconfined space as a space whose volume is
not less than 50 cubic feet per 1,000 Btu per hour (4.8m
3
) of the
aggregate input rating 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.
If there are no other appliances in the area, the minimum
volume which can be defined as an unconfined space for the
appliances covered by this manual is as follows:-
Model
Minimum unconfined
space (cu. ft)
276N 1250
276P 1400
If there are other appliances in the area, add 50 cu. ft. to the
above figure for every 1,000Btu/h of total maximum input rating
of these appliances.
Do not include any direct vent appliances in the calculation.
Direct vent appliances draw air from and exhaust combustion
products directly to the outdoors.
WARNING: If the area in which the heater may be operated is
smaller than that defined as an unconfined space, provide
adequate combustion and ventilation by one of the methods
described in the National Fuel Gas Code, ANSI Z223.1, 1992,
Section 5.3.
PRE-INSTALLATION CHECKS
Check gas type. Use only with the gas type indicated on the
appliance rating label. If the gas type indicated on this label is not
your type of gas supply do not install! Contact your dealer for
the proper model.
Check gas line pressure. Check that the pressure is no greater
than the maximum shown in appliance specification table. This
will prevent damage to the regulator fitted to the appliance.
Propane appliances require an external regulator to reduce the
supply tank pressure to the maximum of 14 inches w.c. This is in
addition to the regulator fitted to the appliance.
WARNING: Connecting directly to an unregulated
Propane tank can cause an explosion!
EQUIPMENT NEEDED FOR
INSTALLATION
(not included with appliance)
a) Pipe sealant resistant to the gas used and all its constituents.
Note that natural gas can contain some LP gas during peak
supply periods.
b) Piping. We recommend using only new black iron or steel
pipes. Copper tubing may be acceptable - check local codes.
If copper tubing is used, it must be internally tinned or
equivalently treated to resist corrosion by sulfur compounds.
c) Manual shut-off valve.
d) Union, drip leg and
1
/8
"
NPT plugged tap for test gauge
connection.
e) Pipe wrenches.
f) Pressure test gauge equipment.