Johnson Controls YORK YVAM 0350, Руководство по эксплуатации и техническому обслуживанию

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Note: A pad of 50 log sheets can be ordered from your local Johnson Controls branch by
requesting Form 160.88-MR1 .
An accurate record of readings serves as a valuable reference for operating the system. Readings
taken when a system is newly installed establish the normal conditions with which to compare later
readings.
For example, an increase in condenser approach temperature (condenser temperature minus
leaving condenser water temperature) may be an indication of dirty condenser tubes.
Fault shutdowns
The chiller is programmed to shut down on two kinds of fault conditions:
• A Cycling fault allows the chiller to automatically restart when the condition clears.
• A Safety fault requires the cause for the condition be determined and resolved before
restarting. When a Safety fault occurs, press the Clear Faults button on the panel Home
screen to restart the chiller. When the condition is cleared and the Clear Faults button is
pressed, the chiller restarts unless the local Stop button was pressed, or the remote run
command ceased.
Performing prolonged shutdown
About this task:
If the chiller must be shut down for an extended period of time, for example, over the winter
season, use the following procedure:
• Test all system joints for refrigerant leaks with a leak detector. If any leaks are found, they
must be repaired before allowing the system to stand for a long period of time. During long
idle periods, check the tightness of the system periodically.
• Power to the chiller must remain energized so that the UPS panel can maintain the battery
health during the prolonged idle period. This prevents battery failure.
Restart after prolonged shutdown
The chiller has a start inhibit limit for storage battery minimum voltage below 12.8 VDC when
charging. Ensure that the chiller has line power and battery disconnect restored at least eight hours
before the first planned startup to charge the battery.
Freeze damage protection
WARNING
Failure to follow required freeze protection protocols can void the warranty.
If the YVAM is exposed to subfreezing ambient temperatures at any time during its life, it is critical
to protect against evaporator freeze damage. The YVAM chiller can be equipped with features to
prevent freeze damage to the evaporator. These features require continuous power to the chiller
control panel, chilled fluid circuit pumps, and evaporator heaters to prevent damage from freezing.
If continuous power cannot be guaranteed or chilled fluid flow cannot be provided during periods
27 YVAM Control Center