CyberChiller Series Installation, Operation & Maintenance Manual
supplied to the equipment. The flow switch senses the coolant flow in the system. When the pump is operat- ing, the coolant flow in the piping actuates the flow switch. The switch will signal the system controller to disable compressors and expansion valves and close the hot gas valves if the coolant flow rate drops.
NOTE
During initial operation the “Y” strainer will trap the majority of the particulate left in the system as a result of various manufacturing processes. The strainer MUST be cleaned every 30 minutes during the first 3 hours of operation to ensure adequate flow of coolant.
3.2.1.4Water/Glycol Outdoor Fluid CoolerOn a call for cooling the dry contacts on the drycooler control relay in the CyberChiller’s electric box close the 24 VAC circuit from the “powered pump package” and turn on the drycooler and pump.
An Aquastat cycles the dry cooler fan(s) on and off to maintain an 85°F glycol temperature. As the glycol temperature rises above 85°F the aquastat starts cycling the drycooler fan ON to maintain 85°F glycol temperature.
3.2.1.4.1Dual Pump Packages
A field installed flow switch (shipped loose from the factory) must be installed in the main glycol line. If flow is not established the flow switch closes the 24 VAC control circuit to a switch over relay and turns off the primary pump contactor after a time delay, and turns on the secondary pump.
The manual Primary/Secondary switch is mounted through the side of the pump package electric box. Normally the switch is in the “Primary” position which allows the controller to rotate the pumps (auto switch). Switching to the “Secondary” position manually overrides the primary pump control and only the secondary pump will operate. While in the “Secondary” position the pump package will also
The microprocessor controller is factory programmed based on the optional features selected. Most applications require no field
(©October, 2006) | ||||
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