General Design - Trane TR-OHS RCU Series Installation, Operation And Maintenance Manual

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.
Figure 1. Typical layout RCU-I (top) and RCU-O (bottom)
AIR OUTLET
Electric box
Access panel
AIR OUTLET
Service
Disconnect
Switch
Electric box
Access panel
Mounting Base
SS-SVX004C-EN
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.
Blower
Blower Motor
AIR INLET
Removable Lid
Disconnect
Switch
Electric box
Fan
Assembly
AIR INLET
Condenser Unit Coil
Compressor
Electric box
Receiver
(Optional)
Compressor
Receiver
(Optional)
Coil
Introduction
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