WARNING
Failure to follow the following procedures will cause severe personal injury or death to operators
themselves or people on-site. It is the obligation and responsibility of operators to identify and
recognize the inherent hazards of material under pressure and to protect themselves.
1. Check that the working space is open and has good ventilation. If it does not have good
ventilation, connect a hose or pipe to the valve, callout 5, and route it to outside.
2. Slowly open the valve, callout 5, until fully opened.
3. Monitor the pressure gauge, callout 2. When working correctly, the pressure decline is
gradual.
4. When the pointer of pressure gauge stops moving and no nitrogen is released from the
valve, callout 5, it means that no positive pressure exists in the waterbox.
5. Now it is safe to remove the flange cover, callout 6, or sealing cap, callout 9.
6. Close the valve, callout 5, and remove the warning tag, callout 1.
Shipment form 3 and 7
All openings on the compressor, shells including evaporator and condenser, and oil reservoir are
closed and charged with nitrogen to a pressure of 0.5 barg.
WARNING
To remove the closures, sealing caps, or sealing plug under pressure is extremely dangerous, and may
cause severe injury or death to the operator or people in site.
Before trying to remove the closures, caps, or plugs on compressor and shells, relieve the pressure in
compressor, shells, or system that are charged with nitrogen by opening the valves on them slowly
until fully open.
WARNING
When relieving the pressure from compressor, shells, or system, conduct the nitrogen to outside to
prevent the potential risk of asphyxiation.
11Model YK (Style G) Chiller Field Reassembly for Form 3 and Form 7
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