Mounting/Placing The Rcu-I; Piping Connections - Trane TR-OHS RCU Series Installation, Operation And Maintenance Manual

Installation
Condensing units must not be located in the vicinity of
steam, hot air or fume exhausts. The clearance around the
unit should be at least 1 times (1×) the unit's width to
ensure adequate airflow to the coil. Space multiple units
so that hot condensing exhaust air is not directed toward
the air inlet of an adjacent unit. Avoid areas where heavy
snow will accumulate at air inlet and outlet openings. If
possible, make use of terrain features such as trees and
buildings to provide a shaded location. This will minimize
the solar load on the unit. Avoid ground level sites that are
accessible to the public.
Install a solid base, capable of supporting the weight of the
equipment. Reference the installation drawing for the 
non-charged system weight. The base should be at least 2
inch higher than the surrounding grade and 2 inch larger
than the dimensions of the condensing unit base (refer to
the above figure). Insert the factory provided vibration
isolators between the RCU-O and the base as shown in
above figure to reduce the amount of vibration
transmitted to the mounting surface. Secure the unit with
fasteners (field supplied by others) so that the system will
not move during operation.
Figure 3. RCU-I mounting

Piping Connections

Split air-cooled systems require a field installed copper
suction line and copper liquid line between the RCU and
the evaporator. Refer to the refrigeration diagram
provided with the unit for piping details. Use standard
refrigeration practices for piping, supports, leak testing,
dehydration and charging of the refrigeration circuits.
Note: RCU units are shipped pressurized, with a dry
nitrogen holding charge. Before installing the
interconnecting piping, observe appropriate safety
precautions and release the pressure with an
available stem valve or Schrader valve prior to
uncapping the pipes.
10
Vibration Mount
(by others)

Mounting/Placing the RCU-I

Proper Structural Support Required!
Failure to ensure proper structural ceiling support could
result in unit falling from its location which could result
in death or serious injury. Ceiling structure must be
strong enough to support the weight of the unit and
any accessories. If unsure, check with a structural
engineer.
RCU-I systems are designed for ceiling mounting in a
suspended ceiling grid (spot cooler) or above the
suspended ceiling for ducted systems. Refer to the below
figure.
Notes:
• Do not install the A/C system directly above electronic
equipment that may hinder serviceability.
• Equipment must be level to operate properly
012-040
All-Thread
Hanger Rod
Hex Nut
Flat Washer
Bushing
Rubber Grommet
Mounting
angle
Rubber
Grommet
Flat Washer
Lock Washer
Hex Nut
RCU units can use either R407C refrigerant. All
refrigeration piping should be installed with high
temperature brazed joints. The refrigeration piping should
be isolated from the building by the use of vibration
isolating supports. Provide supports (clamps or hangers)
as necessary every 5 to 10 ft along piping runs to minimize
vibration and noise transmission. To prevent tube damage
when sealing openings in walls and to reduce vibration
transmission, use a soft flexible material to pack around
the tubes.
Wrap wet rags around the pipes between the areas to be
soldered and any nearby refrigeration components to
keep excessive heat from traveling through the pipe and
causing damage. Clear all pipe connections of debris and
prepare the connections for soldering. Use only L or K
WARNING
048-120
All-Thread
Hanger Rod
Mounting
angle
Factory
supplied
4 X 4 Cork
Factory supplied
Flat Washer
Hex Nut
SS-SVX004C-EN