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X8.22.4 y.,JUSTRIAL RELATIONS TITLE 8 (Register 7b-,-4o. 13-3-2375) (h) The total refrigeration load shall be computed as the sum of the following: (1) Load imposed by heat flow into the container caused by the temperature differential between design ambient temperature and storage temperature. (2) Load imposed by heat flow into the container caused by max- imum sun radiation. (3) Maximum load imposed by filling the container with ammonia warmer than the design storage temperature. More than one storage container may be handled by the same. refrigeration system. J(i) A minimum of two compressors shall be provided, either of which be of sufficient size to handle the loads listed in Section 514(h) (1) and (2). Where more than two compressors are provided, minimum standby equipment equal to the largest normally operating equipment shall be installed. Filling compressors may be used as standby equip- ment for holding compressors. Compressors shall be sized to operate with a suction pressure at least 10 percent below-the minimum setting of the safety valve(s) on the storage container and shall withstand a suction pressure at least equal to 120 percent of the designpressure of the container. 0) Each compressor shall have its individual driving unit. An emergency source of power of sufficient capacity to handle the loads listed in Section 514(h) (1) and (2) shall be provided unless facili- ties are available to safely dispose of vented vapors while the refrigera- tion system is not operating. (k) The refrigeration system shall be arranged with suitable controls togovern the compressor operation in accordance with the load as evidenced by thepressure in the container(s). An emergency alarm system shall be installed to function in the event the pressure in the container(s) rises to the maximum allowable operat- ing pressure. An emergency alarm and shutoff shall be located in the condenser system to respond to excess discharge pressure caused by failure of the cooling medium. All automatic controls shall be installed in a manner .to preclude operation of alternate compressors unless the controls will function with the alternate compressors. (1) An entrainment separator of suitable size and design pressure shall be installed in the compressor suction line of lubricated compres- sion. The separator shall be equipped with a drain and gaging device. An oil separator of suitable size shall be installed in the compressor discharge line. It shall be designed for at least 250 p.s.i. and shall be equipped with a gaging device and drain valve. (m) The condenser system may be cooled by air or water or both. The condenser shall be designed for at least 250 p.s.i. Provision shall be made for purging noncondensibles either manually or automatically.