7.5 Chilled Water Connections
Water connections for the evaporator side are 4-8” grooved pipe. The upper header is for Entering Chilled Water to the module. The bottom header is
for Leaving Chilled Water from the module. The entering header contains a 30 mesh filter strainer to prevent debris from entering the brazed plate heat
exchanger. This filter should be used as a last means of defense. Proper filtration before the module should be installed for easy access to cleaning.
7.6 Expansion Valve, Liquid Line Solenoid, Liquid Receiver
Chiller Modules use a mechanical expansion valve for refrigerant control to the evaporator. Superheat should be set to approximately 10-12°F. The Liquid Line
Solenoid is used to prevent refrigerant migration into the evaporator during the OFF cycle. A properly sized liquid receiver is used to store excess refrigerant
needed in the refrigerant circuit for different ambient temperatures. When the module is designed for Low Ambient Operation to -20°F, a larger receiver than
standard is used.
7.7 Nameplate
Module nameplate(s) are located on the electrical control box door. Nameplates include phone and address for Multistack, model and serial number
(important to supply when calling for service parts or technical support), refrigerant type and charge, and electrical data.
