Reznor EEDU, Установка, эксплуатация и обслуживание

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I-EEDU (02-21) 150492-A
•
Clearances from the heater and vent to construction or material in storage must conform with the National Fuel
Gas Code ANSI Z223 .1 (latest edition) pertaining to gas-burning devices and such material must not attain a
temperature over 160°F by continued operation of the heater .
•
Special installations (aircraft hangars/garages): in the United States, installation in an aircraft hangar should be
in accordance with NFPA No . 409 (latest edition), Standard for Aircraft Hangars , in public garages in accordance
with NFPA No . 88A (latest edition), Standard for Parking Structures , and in repair garages in accordance with
NFPA No . 88B (latest edition), Standard for Repair Garages . In Canada, installations in aircraft hangars, parking
garages, and repair garages should be in accordance with the requirements of the enforcing authorities and with
CSA B149 .1 codes .
Unit Location
⚠ CAUTION ⚠
Do not locate the heater where it may be exposed to liquid spray, rain, or dripping water.
•
A duct furnace is designed for connection to an inlet and an outlet duct and depends on an external air handler .
Location must be in accordance with Clearances section .
•
There are a variety of factors such as system application, building structure, dimensions, and weight that contribute
to selecting the location . Read the installation information in this manual and select a location that complies with
the requirements .
Combustion Air Requirements
⚠ WARNING ⚠
The unit is designed to take combustion air from the space in which it is installed and is not
designed for connection to an outside combustion air intake duct. Connecting this furnace to an
outside combustion air intake duct voids the warranty and could cause hazardous operation.
• The unit is designed to take combustion air from the space in which it is installed . The air that enters into the
combustion process is vented to the outdoors . Sufficient air must enter the equipment location to replace the air
exhausted through the vent system .
•
Modern construction methods involve a greater use of insulation, improved vapor barriers, and weather-stripping .
The result is that buildings are generally much tighter structurally than they have been in the past . The combustion
air supply for gas-fired equipment can be affected by these construction conditions because infiltration that would
have existed in the past may not be adequate . Extensive use of exhaust fans aggravates the situation . In the
past the filtration of outside air assumed in heat loss calculations (one air change per hour) was assumed to be
sufficient . However, current construction methods may now require the introduction of outside air into the room or
building through wall openings or ducts .
•
Under all conditions, enough air must be provided to ensure there will not be a negative pressure condition within
the equipment room or space . A positive seal must be made in all return-air connections and ducts .
•
Requirements for combustion air and ventilation air depend upon whether the unit is located in a confined or
unconfined space . A confined space is defined as a space whose volume is <50 cubic feet per 1,000 BTUh of the
installed appliance input rating . An unconfined space is defined as a space whose volume is
≥
50 cubic feet per
1,000 BTUh of the installed appliance input rating .
• Even a slight leak can create a negative pressure condition in a confined space and can affect combustion . Do
not install a unit in a confined space without providing wall openings leading to and from the space . Depending
on the combustion air source, provide openings near the floor and ceiling for ventilation and air for combustion as
shown in
Figure 1
and as listed in
Table 2
.
NOTE: For further details or other approved methods on supplying combustion air to a confined
space, refer to the National Fuel Gas Code ANSI Z223.1a (latest edition).