York YCWS0313SC, Installation, Operation And Maintenance Manual, Page: 8 / 104

YORK INTERNATIONAL
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only be carried out by suitably trained and qualified
personnel. No attempt should be made to gain access
to the control panel or electrical enclosures during nor-
mal operation of the unit.
Refrigerants and Oils
Refrigerants and oils used in the unit are generally non-
toxic, non-flammable and non-corrosive, and pose no
special safety hazards. Use of gloves and safety glasses
are, however, recommended when working on the unit.
The build up of refrigerant vapor, from a leak for ex-
ample, does pose a risk of asphyxiation in confined or
enclosed spaces and attention should be given to good
ventilation. For more comprehensive information on
safety precautions for use of refrigerants and oils, refer
to the Materials Safety Data tables provided on pages 9
through 11.
High Temperature and Pressure Cleaning
High temperature and pressure cleaning methods (e.g.
steam cleaning) should not be used on any part of the
pressure system as this may cause operation of the pres-
sure relief device(s). Detergents and solvents which may
cause corrosion should also be avoided.
EMERGENCY SHUTDOWN
In case of emergency the electrical option panel is fitted
with an emergency stop switch CB3 (Circuit Breaker
3). Separate Circuit Breakers, CB1 (System 1) and CB2
(System 2), can also be used to stop the respective sys-
tem in an emergency. When operated, it removes the
electrical supply from the control system, thus shutting
down the unit.
General Chiller Information & Safety