Reznor RXH (Outdoor PreevA) Unit Installation Manual - Manual (Page 4)

Form I-RDH/REH/RHH/RXH (12-14), Page 4
2.0 Location
Hazards of Chlorine (Models RDH and RHH) - 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 combustion process. This may be done
by wise location 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.
3.0 Receiving,
Uncrating, and
Preparing for
Installation
Model RDH, REH, RHH, and RXH units are shipped completely assembled. The heavy
gauge unit base has a lifting hole at each corner. Use spreader bars when lifting to
prevent chains or cables from damaging the cabinet.
Immediately upon receiving, check for any damage that may have been incurred dur-
ing shipment. If damage is found, document the damage with the transporting agency
and immediately contact your Reznor ® distributor. If you are an authorized Distributor,
follow the FOB freight policy procedures as published by Reznor ® products.
Check the gas specifications and electrical characteristics of the unit to verify that they
agree with the gas and/or electric supply at the installation site.
Review this booklet and become familiar with the installation requirements. Before
beginning, make preparation for necessary supplies, tools, and manpower.
Field-Installed Parts - If installing a high efficiency Model RHH, components for
field installation of a freeze-resistant condensate drain and trap are shipped separately.
Required
Parts Shipped
Separately
for
Model RHH
P/N Description
271064 Condensate Drain Trap
205037 1/2” Schedule 40 Tee
105944 1/2” Schedule 40 Female Adapter
105948 1/2x1/2 Nylon Hose Barb
271183 36” length of pipe insulation (for insulating the drain hose)
271184 36” length of pipe insulation (for insulating the 1/2” PVC drain)
Shipped-Loose or Shipped-Separate Optional Parts - Some control options
have parts either shipped loose with the heater, shipped separately, or mounted on a
shipped-separate remote console (if ordered). If your unit is equipped with any of the
gas or air inlet control options in the table below, be sure these parts are available at
the job site.
Model RDH - If local code requires 4-ft (1.2M) vertical clearance between the flue outlet
and the fresh air intake of the heating system or the building, install a vertical vent with
an optional vent cap. (If the vent cap has not been ordered, contact your distributor.)
See Paragraph 6.3 for specific installation requirements.
California Warning Label - If a Model RDH or RHH gas-fired heater is being installed
in the state of California, the installer MUST attach a warning label on the outside of
the access door. The California Warning label is shipped in the literature bag along with
this manual, the warranty form, and any other paperwork that applies.
Select a location on the heater access panel. Be sure the surface is clean and dry and
affix the label.
Massachusetts Requirement - If a Model RDH or RHH gas-fired heater is being
installed in the Commonwealth of Massachusetts, it must be installed by a licensed
plumber or licensed gas fitter.
Most of the outdoor units are designed to be set on a slab, on a roof curb, or on rails
( NOTE: Model RHH is designed for curb mount only.) All units must be level. When
selecting the location, check the following.
 Installation location must comply with local codes.
 Refer to the weights in Paragraph 5.1. Structure must support the weight.
 Comply with required clearances in Paragraph 4.1.
 Position the unit so that the outside air inlet will not be facing into the prevailing
wind.
 Refer to the paragraph below on the hazards of chlorine.
1.5 Installation Codes
(cont’d)
1.0 General (cont’d)