Entering Chilled Water Piping; Leaving Chilled Water Piping; Heat Recovery Water Piping; Evaporator Drain - Trane RTAD 085 Installation Operation & Maintenance

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.
CAUTION! Install strainer in
evaporator water inlet piping. Failure
to do so can result in evaporator
tube damage.
RTAD-SVX01F-E4
Installation - Mechanical
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
CAUTION! To prevent evaporator
damage, do not exceed 16 bar
evaporator water pressure.

Heat Recovery Water Piping

Entering:
Air vents
Water pressure gauges
Vibration eliminator / expansion
compensator
Shutoff valve
Thermometers
Pipe strainer
Clean-out tees
Leaving:
Air vents
Water pressure gauges
Vibration eliminator / expansion
compensator
Shutoff valve
Thermometers
Balancing valve
Clean-out tees

Evaporator Drain

A 3/4" drain connection is located
under the evaporator shell. 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 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 flow-
sensing device will provide desired
operation.
Follow the manufacturer's
recommendations for selection and
installation procedures. General
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 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 UCM-CLD provides a
6-second time delay after a "loss-of-
flow" diagnostic before shutting the
unit down. Contact a qualified
service representative if nuisance
machine shutdowns persist.
3. Adjust the switch to open when
water flow falls below nominal.
Evaporator data is given in
Tables 1-22. Flow switch contacts are
closed on proof of water flow.
4. Install a pipe strainer in the
entering evaporator water line to
protect components from
waterborne debris.
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