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(©October, 2006)
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.
3.2.1.4 Water/Glycol Outdoor Fluid Cooler
On 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.
3.2.1.4.1 Dual 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 auto-switch to the
primary pump in the event of a loss of coolant flow.
3.3 Microprocessor Controller Programming
The microprocessor controller is factory programmed
based on the optional features selected. Most applica-
tions require no field start-up or program adjustment
beyond setting the current date and time. Separate
operating instructions for the controller have been sent
with your unit, including each feature's factory "default"
setting and the available adjustment range, if appli-
cable.
3-2