Reznor CAUA Installation Instructions Manual

CASED COOLING COIL INSTALLATION FOR GAS-FIRED
INDOOR HEATER
NOTE: Installation should be done by a qualified agency in accordance with these instructions
and in compliance with all codes and requirements of authorities having jurisdiction.
• These instructions are for installing an optional cased cooling coil on a model CAUA heater (see
coil may be ordered as either model ACU (A, B, or C) or as a C option. Thermostatic expansion valves selected
to match the coil are shipped loose for field-installation.
• Shipped with the heater is a package of parts required to install a heat section condensate drain. When the
application includes a cooling coil, installation of the heat section condensate drain is required.
• Refer to the installation manual provided with the heater for important safety information and for instructions to
install the heater. The heater should be in its final installation location without discharge ductwork before installing
the cooling coil.
• Refer to Table 1 to match model CAUA and ACU unit sizes with available cooling coils.
NOTE: All cooiling coils are for use with R-410A refrigerant.
Model CAUA Cased Cooling
Unit Size Coil Model
150, 200 ACUA
250, 300 ACUB
*
ACUC
350, 400
*
The cased cooling coil for unit sizes 350 and 400 may include a factory-installed discharge plenum (option CD62). To install a cased cooling
coil with a discharge plenum, refer to these instructions plus the instructions in the CAUA-DISCH-PLENUM manual available at
reznorhvac.com.
MODEL CAUA

GENERAL INFORMATION

Figure 1. Model CAUA with Optional Cooling Coil
Table 1. Cooling Coils
ACU Unit
Size
060
072
090
090
120
150
120
150
180
Revision: CAUA-COOLING-COIL (03-22) 166152-A
Supersedes: I-CAUA-CC (04-15) PN166152R5
Option
C060 5-ton, single-circuit A or dual-circuit A (1/3–2/3) cased coil
C072 6-ton, single-circuit A cased coil
C090 7.5-ton, dual-circuit A (50/50 or 1/3–2/3) cased coil
C090 7.5-ton, dual-circuit A (50/50 or 1/3–2/3) cased coil
C120 10-ton, dual-circuit A (50/50 or 1/3–2/3) cased coil
C150 12-ton, dual-circuit A (50/50 or 1/3–2/3) cased coil
C120 10-ton, dual-circuit A (50/50 or 1/3–2/3) cased coil
C150 12-ton, dual-circuit A (50/50 or 1/3–2/3) cased coil
C180 15-ton, dual-circuit A (50/50 or 1/3–2/3) cased coil
Figure 1). The
Description
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