To relieve pressure from the unit, complete the following steps:
1. Check the working space to make sure that it is open and has good ventilation. If the space is
not well ventilated, connect a hose or pipe to the valve (Item 5) and route it to outside.
2. Open the valve slowly until it is fully opened.
3. Monitor the pressure gauge (Item 2). The pressure should decline gradually.
4. When the pointer of pressure gauge does not move and no nitrogen comes out of valve (Item
5), it means that no positive pressure exists in the waterbox.
5. Now it is safe to remove the flange cover (Item 6) or sealing cap (Item 9).
6. Close the valve and remove the warning tag (Item 1).
Shipment form 2/3/7/9
All openings on the compressor, shells including evaporator and condenser, and oil reservoir are
closed and charged with nitrogen to a pressure of 2 to 3 psig (115 to 122 kPa).
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.
DANGER
When relieving the pressure from compressor, shells, or system, conduct the nitrogen to outside to
prevent the potential risk of asphyxiation.
Shipment form 1/10
The unit is shipped with refrigerant charge, it is not needed to relieve the pressure. Do not try to
open any valves to relieve pressure or open closures, cap, or plugs on the compressor, shells, and
elsewhere on the system.
Reclaim the refrigerant in the system before any service activities are done to the refrigeration
system. Fully relieve the system pressure and then repair.
DANGER
The unit is charged with tons of refrigerant. When an uncontrollable leak is found, inform all of the
relevant people to evacuate from the building to prevent from asphyxiation.
Never touch the refrigerant that is leaking, especially the liquid refrigerant, this will cause severe
freezing to your hands or body.
15
Model YK (Style G) Centrifugal Liquid Chiller
Summary of Contents for YORK YK Series
Page 2: ...2 Model YK Style G Centrifugal Liquid Chiller...
Page 14: ...Figure 3 Long term storage tube side Model YK Style G Centrifugal Liquid Chiller 14...
Page 19: ...Figure 6 Neoprene isolators in mm 19 Model YK Style G Centrifugal Liquid Chiller...
Page 20: ...Figure 7 Spring isolators in mm Model YK Style G Centrifugal Liquid Chiller 20...
Page 21: ...Figure 8 Spring isolators continued in mm 21 Model YK Style G Centrifugal Liquid Chiller...