Introduction
SS-SVX004C-EN
7
General Design
Figure 1
depicts a typical layout of the RCU-I and RCU-O
and identifies their major components.
Compressor
The compressor is mounted inside the unit on vibration
absorbers to eliminate noise and vibration during
operation. Compressors are equipped with crankcase
heaters to prevent refrigerant from migrating into the
compressor during the off cycle, permitting smoother
start-ups.
Condensing Unit Coil
The condensing unit coil is rated at the capacity indicated
by the unit model number. It is a copper tube, aluminum
finned coil.
Fan Assembly
The RCU-O uses a propeller type aluminum, multi-blade
fan with a direct drive motor. The motor is equipped with
internal overload protection and is protected from over
current by a motor starter protector located in the electric
box. The 012-040 model RCU-I use a direct-drive blower.
The 042-120 RCU-I units have a belt-driven blower with
separate drive motor.
Electric Box
RCU electrical components are protected in an enclosure
located inside the RCU unit behind a removable front
access panel. This panel on the RCU-O is safety interlocked
with the service disconnect switch, preventing the panel
from being removed when the switch is in the ON position.
A factory installed electrical disconnect switch is available
as an option with the RCU-I, otherwise a customer
provided electrical disconnect switch should be field
installed.
Figure 1.
Typical layout RCU-I (top) and RCU-O (bottom)
AIR INLET
AIR OUTLET
Electric box
Access panel
AIR INLET
AIR OUTLET
Electric box
Access panel
Service
Disconnect
Switch
Mounting Base
Removable Lid
Blower
Blower Motor
Electric box
Compressor
Condenser Unit Coil
Receiver
(Optional)
Electric box
Coil
Fan
Assembly
Compressor
Receiver
(Optional)
Disconnect
Switch
