Reznor UDBS Unit Installation Manual - Manual (Page 6)

Form I-UDB, P/N 202658 R14, Page 6
NOTE: Venting
requirements may
affect location.
Consult the Venting
Manual for this heater
before making final
determination.
Hazards of Chlorine
- applies to location
of Model UDBS
heater with regard to
combustion air inlet
3.0 Uncrating and
Preparation
2.0 Unit Heater
Location
(cont’d)
3.1 Uncrating and Inspecting
This unit was test operated and inspected at the factory prior to crating and was in
operating condition. If the heater has incurred any damage in shipment, document the
damage with the transporting agency and contact an authorized Reznor ® Distributor.
If you are an authorized Distributor, follow the FOB freight policy procedures as pub-
lished by Reznor for Reznor ® products.
Check the rating plate for the gas specifications and electrical characteristics of the
heater to be sure that they are compatible with the gas and electric supplies at the
installation site.
For best results, the heater should be placed with certain rules in mind. In general, a
unit should be located from 8 to 12 feet (2.4-3.7M) above the floor. Units should always
be arranged to blow toward or along exposed wall surfaces, if possible. Where two or
more units are installed in the same room, a general scheme of air circulation should
be maintained for best results.
Suspended heaters are most effective when located as close to the working zone as
possible, and this fact should be kept in mind when determining the mounting heights
to be used. However, care should be exercised to avoid directing the discharged air
directly on the room occupants.
Partitions, columns, counters, or other obstructions should be taken into consideration
when locating the unit heater so that a minimum quantity of airflow will be deflected by
such obstacles.
When units are located in the center of the space to be heated, the air should be dis-
charged toward the exposed walls. In large areas, units should be located to discharge
air along exposed walls with extra units provided to discharge air in toward the center
of the area.
At those points where infiltration of cold air is excessive, such as at entrance doors and
shipping doors, it is desirable to locate the unit so that it will discharge directly toward
the source of cold air from a distance of 15 to 20 feet (4.6-6.1M).
CAUTION: Do not locate the heater where it may be exposed to
water spray, rain, or dripping water.
For a location where dirt, dust, or other airborne contaminants are present in the indoor
environment, it is recommended to install a separated-combustion unit, Model UDBS,
that uses outside air for combustion. Using a separated-combustion unit will reduce the
build-up of contaminants on the burner. Any buildup on the burner will adversely affect
the combustion process.
The presence of chlorine vapors in the combustion air of gas-fired heating equipment
presents a potential corrosion hazard. Chlorine found usually in the form of freon or
degreaser vapors, when exposed to flame will precipitate from the compound, and go
into solution with any condensation that is present in the heat exchanger or associated
parts. The result is hydrochloric acid which readily attacks all metals including 300
grade stainless steel. Care should be taken to separate these vapors from the combus-
tion process. This may be done by wise location of the unit vent and combustion air
terminals with regard to exhausters or prevailing wind directions. Chlorine is heavier
than air. Keep these facts in mind when determining installation location of the heater
in relation to building exhaust systems.
2.3 Location Recommendations
Locate the heater so that it is a minimum of five feet (1.5M) above the floor and in com-
pliance with the clearances in Paragraph 4.1.
WARNING
If touched, the vent pipe and internal heater surfaces that are
accessible from outside the heater will cause burns. Suspend the
heater a minimum of 5 feet (1.5M) above the floor.