ARTC-SVX005B-EN
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Maintenance Procedures
Maintenance Strategy
The primary goal of preventive maintenance is to avoid
the consequences of failure of equipment. This may be
by preventing the failure before it actually occurs which
preventive maintenance helps to achieve. It is designed
to preserve and restore equipment reliability by
replacing worn components before they actually fail. In
addition, operators can record equipment operating
conditions, temperatures, and pressures so they know
to replace or repair worn parts before they cause chiller
failure. The ideal maintenance program predicts and
prevents unnecessary and costly repairs and chiller
down time. Trane chillers are designed for ease of
access with a premium placed on locating key
components to facilitate visual inspection and hands-
on verification.
One approach to chiller maintenance envisions three
levels of maintenance effort reflecting frequent,
periodic, and scheduled maintenance tasks, with each
level building on the previous level. A daily or weekly
“health check” involves habitual visual and manual
inspections of the components of the chiller so that
anomalies become evident when they occur. Weekly or
monthly periodic maintenance involves cleaning
specific components and inspecting glycol and
lubrication fluids. Finally, since all components will
eventually wear out, a prudent maintenance strategy
will anticipate and schedule replacement or rebuilding
of critical components before they fail and require
emergency response to keep chillers operational. See
below figure.
Maintenance for HVAC equipment and facilities can
include a “preventive maintenance checklist” which
includes small checks which can significantly extend
service life. Other considerations such as weather and
equipment age are taken into account; maintenance
and equipment replacement is often performed before
the hottest time of the year.
Figure 34.
An approach to chiller/heater maintenance
Power Disconnect Switch
Some Chiller/heater units are optionally equipped with
a panel-mounted disconnect switch installed on the
outside of the power distribution panel (or on each
module’s electrical and control panel if the chiller has
power supplied to each individual module). The
disconnect switch must be turned to the off position
before the panel can be opened for service. When the
panel door is open, power can be reconnected by
turning the handle located on the inside of the panel to
the ON position.
Appropriate Arc Rated PPE must be worn when the
panel door is open and the unit is energized.
