PRODUCT DESIGN
12 Rev 1
This section gives a basic description of cooling unit
operation, its various components and their basic operation.
Ensure your system is properly sized for heat gain and loss
according to methods of the Air Conditioning Contractors
Association (ACCA) or equivalent.
CONDENSING UNIT
These units are designed for free air discharge. Condensed
air is pulled through the condenser coil by a direct drive
propeller fan and then discharged from the cabinet top. The
unit requires no additional resistance (i.e. duct work) and
should not be added.
The RHA, RHD, RHE, and RHF Remote Heat Pump con-
densing units are designed for 208-230 dual voltage single
phase applications. The units range in size from 1.5 to 5-ton
and have a rating of 10, 12, 13, and 14 SEER. The RHA and
VHA models have a 10 SEER rating, the RHD a 12, the RHE
a 13 SEER rating, and the RHF a 14 SEER rating. The
actual system efficiency is dependent upon the unit and its
components. Refer to the "Technical Information" manual
of the unit you are servicing for further details. The RHA 3-
, 4-, and 5-ton models are also available for 230V and 460V
applications.
The RCA, RCB, RCC, VCA, and VCB Remote Condensing
Units are made in 1.5 through 5 ton sizes. RCE models are
available in 2 through 5 ton sizes. They are designed for 208-
240 volt single phase applications. The RCA/RCB 3, 4, and
5 ton models are also available for 230V and 460V 3 phase
applications. The RCC 3, 4, and 5 ton models are also
available for 230V 3 phase applications.
Suction and Liquid Line Connections
The suction and liquid line connections of the unit are set up
for field piping with refrigerant-type copper. Non-back
seating valves were factory-installed to accept the field-run
copper. The total refrigerant charge needed for a normal
installation is also factory-installed. For additional refriger-
ant line set information, refer to the "Technical Information"
manual of the unit you are servicing.
Compressors
Many of the Amana outdoor units use Copeland Compliant®
scroll compressors. There are a number of design charac-
teristics which differentiate the scroll compressor from the
reciprocating compressor. One is the scroll. A scroll is an
involute spiral which, when matched with a mating scroll
form, generates a series of crescent-shaped gas pockets
between the members (see following illustration). During
compression, one scroll remains stationary while the other
form orbits. This motion causes the resulting gas pocket to
compress and push toward the center of the scrolls. When
the center is reached, the gas is discharged out a port
located at the compressor center.
