Johnson Controls YORK YK Series User Manual

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 Chiller26

Johnson Controls YORK YK Series Specifications

General

Brand	Johnson Controls
Model	YORK YK Series
Category	Chiller
Language	English