WAC 296-826-40030   Refrigerated storage compressors.  

     You must:

     • Make sure compressors have all of the following:

     – Their own driving unit

     – Discharge pressure that is governed by the condensing conditions

     – Suitable compressor operation controls based on the load pressure in the container

     – At least two compressors either of which is of sufficient size to handle the intended loads

     – Standby equipment equal to the largest normally operating piece of equipment installed when more than two compressors are provided

     – Automatic controls installed to prohibit the operation of alternate compressors unless the controls will function with alternate compressors.

     • Make sure compressors are sized to operate with a suction pressure that is both of the following:

     – At least ten percent below the minimum setting of the safety relief valves on the storage tank

     – Able to withstand one hundred twenty percent of the design pressure of the tank.

     • Install an oil separator of suitable size in the compressor discharge line that is both:

     – Designed for at least 250 psig;

     AND

     – Equipped with a drain valve and gauging device.



[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. 06-10-067, § 296-826-40030, filed 5/2/06, effective 9/1/06.]