Trane RTXC-XE Series Installation, Operation And Maintenance Manual page 24

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Water Strainer!
To prevent evaporator damage, pipe strainers must be installed in the water supplies to protect
components from water born debris. Trane is not responsible for equipment - only - damage
caused by water born debris.
Equipment Damage!
Thoroughly flush all the water piping before making the final piping connections to the unit
after external water piping installation and leakage test. Construct a temporary bypass around
the unit for flushing to prevent damage to internal components of the evaporator.
Proper system design and installation procedures should be followed closely. The system must be
constructed with pressure tight components and thoroughly tested for installation leaks. Typical
chilled water piping system, as
1. Install field-supplied pressure gauges in the water inlet and outlet of the evaporator.
Note: for assembly unit, install pressure gauges in the water inlet and outlet of each unit.
2. Use vibration eliminators to prevent vibration transmission through the water lines.
3. If desired, install thermometers in the lines to monitor entering and leaving water
temperatures.
4. A field-supplied water strainer with a minimum size of 20 mesh must be installed close to the
evaporator inlet to prevent debris from damaging internal tubes of the evaporator.
5. 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.
6. Install flow switch in the water outlet of the evaporator with pump interlock to prove system
water flow.
Dual Water Flow Switch!
For assembly unit RTXC 310/330/360/400/440XE, 310/330/360/400/440/500/560XE-HSE, install
appropriate water flow switches at the outlet of evaporator for both master and slave units.
7. A vent is provided on the top of the evaporator waterbox. The evaporator can be drained by
removing the drain plugs from the bottom of the waterbox. Field- supplied drainage pipe
installed should apply to all local and national codes.
8. Be sure to provide additional vents at high points in the piping to bleed air from the water
system.
9. Insulate all water piping after leakage test and flushing and provide proper support for the
piping.
Equipment Damage!
To prevent damage to chilled water components, do not allow evaporator pressure to exceed
water side maximum working pressure indicated on the evaporator nameplate.
10. The external water piping should be cleaned before the unit is connected to prevent damage
to internal components of the evaporator. construct a temporary bypass around the unit
during piping clean to prevent damage to internal components of the evaporator.
Equipment Damage!
After water system clean and leakage test, fully drain the water from evaporator and piping
system. Use pressurized air or nitrogen to blow out and ensure that no water stay in the
evaporator and piping in winter.
CAUTION
CAUTION
Figure 8.
CAUTION
CAUTION
CAUTION
RTXC-SVX003D-EN