Trane RTAC 225 Series User Manual

28 RTAC-SVX002A-EN
Installation Mechanical
Provide shutoff valves in lines to the
gauges to isolate them from the system
when they are not in use. Use rubber
vibration eliminators to prevent vibration
transmission through the water lines.
If desired, install thermometers in the
lines to monitor entering and leaving
water temperatures. Install a balancing
valve in the leaving water line to control
water ow balance. Install shutoff
valves on both the entering and leaving
water lines so that the evaporator can
be isolated for service.
CAUTION
Use Piping Strainers!
To prevent evaporator damage, pipe
strainers must be installed in the
water supplies to protect componen-
ts from water born debris. Trane
is not responsible for equipment-
only-damage caused by water born
debris.
“Piping components” include all devices
and controls used to provide proper
water system operation and unit
operating safety. These components
and their general locations are given
below.
Entering Chilled Water Piping
• Air vents (to bleed air from system).
• Water pressure gauges with shutoff
valves.
• Vibration eliminators.
• Shutoff (isolation) valves.
Thermometers (if desired).
• Clean-out tees.
• Pipe strainer.
Leaving Chilled Water Piping
• Air vents (to bleed air from system).
• Water pressure gauges with shutoff
valves. Vibration eliminators.
• Shutoff (isolation) valves.
• Thermometers.
• Clean-out tees.
• Balancing valve.
• Flow Switch
Evaporator Drain
A1/2 inch drain connection is located
under the outlet end of the evaporator
waterbox.
This may be connected to a suitable
drain to permit evaporator drainage
during unit servicing. A shutoff valve
must be installed on the drain line.
Evaporator Flow Switch
Specic connection and schematic
wiring diagrams are shipped with the
unit. Some piping and control schemes,
particularly those using a single water
pump for both chilled and hot water,
must be analyzed to determine how and
or if a ow sensing device will provide
desired operation.
Follow the manufacturer’s
recommendations for selection and
installation procedures. General
guidelines for ow switch installation
are outlined below
1. Mount the switch upright, with a
minimum of 5 pipe diameters of straight
horizontal run on each side. Do not
install close to elbows, orices or
valves.
NOTE: The arrow on the switch must
point in the direction of ow.
2. To prevent switch uttering, remove
all air from the water system.
NOTE: The CH530 provides a
6-second time delay after a “loss-of-
ow” diagnostic before shutting the
unit down. Contact a qualied service
representative if nuisance machine
shutdowns persist.
3. Adjust the switch to open when water
ow falls below the minimum ow rate.
Evaporator data is given in the General
Information section. Flow switch
contacts are closed on proof of water
ow.
4. Install a pipe strainer in the entering
evaporator water line to protect
components from waterborne debris.

Trane RTAC 225 Series Specifications

General

Brand	Trane
Model	RTAC 225 Series
Category	Chiller
Language	English