Form I-UDA, P/N 195673 Rev 13, Page 6
Hazards of Chlorine
- applies to location
of Model UDAS
heater with regard to
combustion air inlet
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 UDAS,
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.
. Unit Heater
Location
(cont’d)
. Location Recommendations (cont’d)
3. Uncrating and
Preparation
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 Thomas & Betts 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.
3. Preparing for Installation
Read this booklet and become familiar with the installation requirements of your par
-
ticular heater. If you do not have knowledge of local requirements, check with the local
gas company or any other local agencies who might have requirements concerning
this installation. Before beginning, make preparations for necessary supplies, tools,
and manpower.
IMPORTANT: Shipping brackets are attached with cabinet screws. When remov-
ing shipping brackets, re-insert ALL screws into the cabinet.
3..1 Field-Installed Parts
If the installation includes optional vertical louvers, downturn nozzle, ceiling mounting
bracket, hanger kit, high altitude kit, multiple heater control, sensor for DDC control,
and/or stepdown transformer,
install these options before the heater is suspended.
Complete instructions are in this form or in the option package; option packages are
shipped separately.
Other shipped separate items could include a vent cap (Option CC1 for UDAP); a vent/
combustion air kit (Option CC2 or CC6 for UDAS); a manual gas valve; a thermostat
bracket kit; a thermostat; and/or a thermostat guard. Be sure all options ordered are at
the installation site.
High Altitude Kit, Option DJ0 or DJ1
If the heater is being installed at an elevation above 2000 ft (610M), the input rate will
have to be derated. This is done by adjusting the valve outlet pressure.
