Refrigerant relief piping
Each unit is equipped with pressure relief valves located on the condenser and on the evaporator to
quickly relieve excess pressure of the refrigerant charge to the atmosphere as a safety precaution
in case of an emergency, such as fire.
Refrigerant relief vent piping, from the relief valves to the outside of the building, is required
by code in most areas and should be installed on all chillers. Refrigerant relief vent piping is
not supplied by Johnson Controls. The vent line should be sized in accordance with the ANSI/
ASHRAE-15, or local code. The vent line must include a dirt trap in the vertical leg to intercept and
permit clean out and to trap any vent stack condensation. The piping must be arranged to avoid
strain on the relief valves, using a flexible connection, if necessary.
Figure 10: Typical refrigerant vent piping
Model YK (Style G) Centrifugal Liquid Chiller
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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...
