Trane R Series Installation Operation & Maintenance page 28

28
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 flow 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
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
Specific connection
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 flow sensing device will provide
desired operation.
Follow
recommendations for selection and
installation
guidelines for flow 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
and unit install close to elbows, orifices or
valves.
NOTE: The arrow on the switch must
point in the direction of flow.
2. To prevent switch fluttering, remove
all air from the water system.
NOTE: The
6-second time delay after a "loss-of-
flow" diagnostic before shutting the
unit down. Contact a qualified service
representative
shutdowns persist.
3. Adjust the switch to open when water
flow falls below the minimum flow rate.
Evaporator data is given in the General
Information
contacts are closed on proof of water
flow.
4. Install a pipe strainer in the entering
evaporator
components from waterborne debris.
and schematic
the manufacturer's
procedures. General
CH530 provides a
if nuisance machine
section. Flow switch
water line to protect
RTAC-SVX002A-EN