Entering Chilled Water Piping; Leaving Chilled Water Piping; Evaporator Drain; Evaporator Flow Switch - Trane R Series Installation, Operation And Maintenance Manual

Installation - Mechanical
"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.

Evaporator Drain

A1/2" drain connection is located under the outlet end of
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

The flow switch is factory-installed and programmed
based on the operating conditions submitted with the
order.The leaving evaporator temperature, fluid type and
fluid concentration affect the selected flow switch. If the
operating conditions on the job site change, the flow
switch may need to be replaced.
The sensor head includes 3 LEDs, two yellow and one
green.Wait 15 seconds after power is applied to the sensor
before evaluating LEDs for flow status. When wired
correctly and flow is established, only the green LED
should be lit. Following are the LED indicators:
• Green ON, both yellow OFF — Flow
• Green and outside yellow ON — No Flow
• Center yellow ON continuously — Miswire
Factory installed jumper wire W11 must be removed if
using auxiliary contacts and/or additional proof of flow.
See schematics in RTAC-SVE01*-EN for more details.
Note: Use caution when connecting auxiliary contacts.
Terminals 1TB6-3 and 1TB6-5 are to be used for
RTAC-SVX01J-EN
field connections. Inadvertent use of 1TB6-5 and
1TB6-4 will result in a FALSE FLOW indication.
NOTICE:
Equipment Damage!
Incorrect wiring of auxiliary contacts could result in
equipment damage.
If using auxiliary flow sensing, both yellow LEDs come on
initially when flow is stopped.The center yellow LED will
turn off after approximately 7 seconds.The LED indicators
are otherwise the same as indicated above.
NOTICE:
Proper Water Treatment!
The use of untreated or improperly treated water in this
equipment could result in scaling, erosion, corrosion,
algae or slime. It is recommended that the services of a
qualified water treatment specialist be engaged to
determine what water treatment, if any, is required.
Trane assumes no responsibility for equipment failures
which result from untreated or improperly treated
water, or saline or brackish water.
Important: If using an acidic commercial flushing
solution, construct a temporary bypass
around the unit to prevent damage to
internal components of the evaporator.
Dirt, scale, products of corrosion and other foreign
material will adversely affect heat transfer between the
water and system components. Foreign matter in the
chilled water system can also increase pressure drop and,
consequently, reduce water flow. Proper water treatment
must be determined locally, depending on the type of
system and local water characteristics.
Neither salt nor brackish water is recommended for use in
Trane air-cooled Series R
to a shortened life to an indeterminable degree.TheTrane
Company encourages the employment of a reputable
water treatment specialist, familiar with local water
conditions, to assist in this determination and in the
establishment of a proper water treatment program.
Using untreated or improperly treated water in these units
may result in inefficient operation and possible tube
damage. Consult a qualified water treatment specialist to
determine whether treatment is needed.
®
chillers. Use of either will lead
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