Safety Matters
Single screw chiller can serve safely and reliably under design conditions. Good judgment and
safety precaution measures shall be available for operating the chiller to avoid losses of
equipment and property or personal in-juries.
Operators must understand and abide by the operation procedures and safety precaution
measures in the installation operation and maintenance manual.
Warning
Installation works shall be entrusted to professional installers, otherwise, any improper installation
will lead to accidents, such as leakage, electric shock and fire, etc.
Please refer to the Safety Requirement for Cooling and Heating Supply Mechanical Refrigeration
System of GB 9237 Standard: Do not place the safety discharge hole of refrigerant in buildings.
Refrigerant emissions from the safety valve must be vented to the outdoors, the refrigerant
accumulated in an enclosed space can cause suffocation.
Please provide adequate ventilation especially in the closed space with a lower story height
according to the GB 9237 Standard. It’s harmful to inhale various refrigerant vapors with extra
heavy concentration. The refrigerant vapor is higher than the air, so it will reduce the oxygen
content in the air, but also cause eye and skin irritation, its decomposition products of thermal
decomposition or photodecomposition is also dangerous.
The chiller cannot be installed in the area with potential leakage of combustible gas, otherwise the
leaking gas around the chiller may cause fire.
It is prohibited to exceed the specific test pressure and the allowable test pressure shall be
confirmed by checking the design pressure in the instructions and on the equipment name plate.
Do not close any valve of the safety devices and please confirm all safety valves shall be installed
correctly and operated normally before the operation of chiller.
Beware of any electrical shock. Please disconnect the power supply before touching the motor
terminal or connection.
The leakage protector is needed, and the Installation of leakage protector shall be complied with
the provisions of a Electrical Equipment Technical Standards and Internal Line Practice.
Non-installation or incorrect installation may cause electrical shock accidents.
Each compressor shall have the circuit breaker respectively, and it may cause accidents of
electrical shock or fire if one master breaker controls more than 2 chillers.
Processing and welding on the chiller directly are prohibited and it may cause the leakage of chiller
and hypoxia of machine room environment.
Only qualified electricians are allowed to work on the electrical equipment.
Do not work on the electric components including control box, switches, and starter cabinet or oil
heater before all power supplies have been disconnected and no residual voltage is released from
the capacitors or solid state components. Lock the open circuit and mark the circuit during the
maintenance. Confirm all the circuits are open before restarting the work if the work is interrupted.
The wrong categories refrigerant or refrigeration oil are prohibited to use, or it may cause the
chiller run improperly; the chiller is easy to cause accidents such as fire or explosion when its
performance fails to meet the design requirements.
Do not attempt to unload connector, cover plate, etc., when the chiller is under pressures or
operating normally. Confirming the pressure is 0kPa before loosening any connector.
Please be careful when assembling the spring to prevent personal injury resulting in sudden
release of spring;
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