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PKG-SVX029A-EN
Piping Components
Water Valves
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious
injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by
Trane or others, refer to the appropriate
manufacturer’s literature for allowable waiting periods
for discharge of capacitors. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
Water valves have a stern packing nut. If there is evidence
of water leakage at the valve stem, proceed as follows:
1. Remove actuator motor from support plate.
2. Remove shaft coupling.
3. Torque the packing nut to 10-ft.-lbs. of torque.
4. Replace shaft coupling.
5. Replace actuator motor.
Water Flow Switch
A water flow switch is required to be installed in the
condenser water pipe within the unit. It is a standard
feature and supplied from the factory.
When the flow switch detects a water flow loss prior to or
during mechanical cooling, the compressor operation locks
out and a diagnostic code displays. If water flow is
restored, the compressor operation automatically restores.
Maintenance Periodic Checklists
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical
hazards, MUST follow precautions in this manual and
on the tags, stickers, and labels, as well as the
following instructions: Unless specified otherwise,
disconnect all electrical power including remote
disconnect and discharge all energy storing devices
such as capacitors before servicing. Follow proper
lockout/tagout procedures to ensure the power can
not be inadvertently energized. When necessary to
work with live electrical components, have a qualified
licensed electrician or other individual who has been
trained in handling live electrical components perform
these tasks.
Monthly Checklist
The following check list provides the recommended
maintenance schedule to keep the commercial self-
contained equipment running efficiently.
1. Inspect unit air filters. Clean or replace if airflow is
blocked or if filters are dirty.
2. Inspect coils for excess moisture or icing. Icing on the
coils may indicate low airflow supply, restricted airflow
from dirty fins, evaporator frost protection sensor
problems, or a shortage of refrigerant flowing through
the coil.
3. Check that condensate from the evaporator and
economizer coils flows freely through the condensate
piping, traps, drain pan, and drainage holes. Remove
algae and or any airflow obstructions.
4. Check the liquid line sight glasses during operation.
Bubbles in the sight glasses indicate a possible
shortage of refrigerant or an obstruction in the liquid
lines, e.g. dirty liquid line filter driers.
5. Inspect filter driers for leaks, flow obstructions, or
temperature drop across the filter drier. A noticeable
temperature differential, e.g. 5°F, in the liquid line may
indicate an obstruction. Replace the filter drier if it
appears clogged.
6. Inspect the optional waterside economizer coil. Clean
the coil to prevent airflow restrictions through the fins.
7. Check and record operating pressures.
Maintenance
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