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Pre-installation
Installation Checklist
Drainage
Locate the unit so that the entire assembly can be allowed
to drain during unit shutdown and repair.
Air Vents
Air vent(s) are located at high points in the Rental RTAC
integral piping and/or evaporator to purge air from the
system. Additional vents must be installed at high points in
the piping system to facilitate air purging during the filling
process.
Water pressure gauges
A water pressure gauge is installed near the inlet side of
the chiller barrel with appropriate piping to measure the
supply, return, and evaporator differential solution
pressure.
NOTICE
Evaporator Damage!
Do not exceed 150 psig evaporator pressure as it
could result in damage to the evaporator.
Pipe unions and connectors
Pipe unions and Victaulic connectors are used to simplify
disassembly for system service.
Thermometers
Temperature gauges are used in the lines to monitor the
evaporator entering and leaving water temperatures.
Differential Pressure
Differential pressure across the evaporator should be
measured using pressure gauges located at strategic
places in the chiller. This is used to determine approximate
flow through the evaporator. Reference
and
Figure 36, p. 38
in order to determine flow in the
machine you have on site.
RTAC-SVX005A-EN
Figure 35, p. 38
Balancing valves
A balancing butterfly valve is installed in the leaving water
line. It will be used to establish a balanced flow.
Note: Entering and leaving water lines have shutoff valves
installed to isolate the evaporator for service.
Flow Meter
F2-F4 style machines are equipped with mechanical flow
meters placed in-line with the chiller piping to determine
flow. Flow readings may become inaccurate at flow rates in
excess of 1000 GPM. To confirm evaporator water flow
rate, refer to procedures for measuring evaporator
differential pressure from
"Differential Pressure Check," p.
37.
Strainer
A pipe strainer is installed in the water return line (inlet
piping to chiller) to protect components from entrapped
debris.
Chiller Drain
Chiller drains are piped to the outside of the chiller casing
with a ball shutoff valve to facilitate evaporator draining
during service or shutdown procedures.
Evaporator Water Piping
Trane Rental Services RTAC chillers utilize 6–inch victaulic
connections.
NOTICE
Evaporator Damage!
Do not exceed 150 psig evaporator pressure as it
could result in damage to the evaporator.
To prevent unit or pump damage, do NOT reverse system
water piping connections to the unit or pump; evaporator
inlet is pre-piped to the discharge of the pump.
7
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