Reznor CAUA Unit Installation Manual - Manual (Page 3)

Form I-CAUA, P/N 164771 R8, Page 3
1.4 Warranty Refer to the limited warranty information on the Warranty Form in the "Owner's Enve-
lope".
Warranty is void if ...
a. Wiring is not in accordance with the diagram furnished with the heater.
b. The unit is installed without proper clearance to combustible materials.
1.5 Installation
Codes
These units must be installed in accordance with local building codes. In the absence
of local codes, in the United States, the unit must be installed in accordance with the
National Fuel Gas Code ANSI Z223.1a (latest edition). A Canadian installation must
be in accordance with the CSA B149.1 and B149.2 Installation Code for Gas Burning
Appliances and Equipment. These codes are available from CSA Information Services,
1-800-463-6727. Local authorities having jurisdiction should be consulted before instal-
lation is made to verify local codes and installation procedure requirements.
2.0 Heater
Location
Check the supporting structure to be used to verify that it has sufficient load-carrying
capacity to support the weight of the unit. The heater must be level. Location must
comply with clearances in Paragraph 4.2.
Approximate Net
Weight (lbs)
Size 150 200 250 300 350 400
Weight - lbs 288 300 380 394 445 460
Weight - kg 131 136 172 179 202 209
TABLE 1 - Heater
Weights
Installation of this system should be done by a qualified agency in accordance with
the instructions in this manual and in compliance with all codes and requirements of
authorities having jurisdiction.
A Model CAUA heater requires installation of an inlet air duct or an optional inlet air
base and a supply duct or an optional discharge plenum. Installation of an optional
mixing box allows for a mixture of return and outside air. If the air entering the blower
will ever be below 35°, the unit must have been ordered with factory-installed makeup
air Option AD4 which includes required stainless steel components and a condensate
drain.
This heater may be installed as a separated-combustion system (taking combustion
air from outside) or as a power-vented system (taking combustion air from the space
where the heater is installed). Separated-combustion units are designed to separate
the air for combustion and the flue products from the environment of the building in
which the unit is installed. Separated-combustion appliances are recommended for
use in dust laden and some corrosive fume environments or in buildings with negative
pressure (up to .15" w.c.). If installed as a separated-combustion system, the heater
must be equipped with both combustion air and exhaust piping to the outdoors. All
Model CAUA heaters must be vented to the outdoors.
If ordered with an optional cooling coil, follow the instructions in Form I-CAUA-CC to
install the coil and the thermostatic expansion valves. The coil will be operated with
R-410A refrigerant. Follow the instructions with the MASA condenser or other matching
condenser.
California Warning
Label
If the unit is being installed in the state of California, the installer MUST attach the warn-
ing label on the outside of the access panel. The California Warning label is shipped
in the "Literature Bag". If installation is in California, select a dry, clean location on the
heat section access panel and adhere the label.
If being installed in the Commonwealth of Massachusetts, this unit must be installed by
a licensed plumber or licensed gas fitter.
Massachusetts
Requirements
WARNING:
Unit must be level for
proper operation. See
Hazard Levels, page
2.
CAUTION: Do not locate the heater where it may be exposed
to water spray, rain, or dripping water.
Hazards of Chlorine - The presence of chlorine vapors in the combustion air of gas-
fired heating equipment presents a potential corrosion hazard. Chlorine will, when
exposed to flame, precipitate from the compound, usually Freon or degreaser vapors,
and go into solution with any condensation that is present in the heat exchanger or