Section 6 - Restarting The Chiller After System Trip; Correcting Alarms And System Trips; Acknowledging Alarms; Executing An Engine Purge - York YB Operation Manual

Starting the Chiller
RESTARTING THE CHILLER AFTER SYSTEM TRIP
A number of conditions can occur during chiller
operation or startup that may cause an alarm or a system
trip. A detailed description of possible alarm and trip
messages is contained in Section 5 of this manual. This
section discusses how to restore the chiller to operational
status after the system has been tripped off line.

CORRECTING ALARMS AND SYSTEM TRIPS

ACKNOWLEDGING ALARMS

In general, when a system parameter is approaching
prescribed limits, an alarm will sound and the Alarm
Box will appear superimposed over the current Display
Screen. Refer to Figure 20.
The window must be closed in order to regain control of
the operator interface panel. While the alarm window
is open, the operator has the following options:
(F1) Ack Alarm
Prompts user to acknowledge the alarm
(F2) Ack All Alarms
Prompts user to acknowledge all alarms
(F3) Silence Alarms
Causes alarm to be silenced until the system detects
another alarm
(F4) Silence Horn
Silences the alarm horn
(F5/F6) Move Up/Move Down
Scrolls through all alarms listed, highlighting each in
turn
(F7) Close
Closes the alarm window
If an alarm occurs during system startup, it is almost
always accompanied with a system trip that will need
to be cleared before a restart can be attempted. Other
alarms and system trips may occur during operation,
and the engine will need to be purged before a restart
can be attempted.
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SECTION 6

EXECUTING AN ENGINE PURGE

Navigate to the engine screen by selecting the following
screen tabs: HOME → ENGINE → (F14) PURGE
ENGINE
The PURGE ENGINE screen tab will turn green to
PURGE, indicating that the engine purge is in progress,
and the message "Engine Purge" will appear in the
System Status display window at the top of the screen.
The engine purge will execute for approximately 20
seconds.
When the engine purge is complete, navigate back to
the Home Screen by selecting the HOME tab. Clear
any alarm or trip messages in the System Details display
window by selecting the (F6) CLEAR MESSAGE
tab.
Select F5 SYSTEM RESET to initiate a system reset.
When the reset has cycled, the message "Ready to Start"
will appear in the System Status display window. The
chiller is now ready to be started.
FORM 160.60-O2 (1004)
YORK INTERNATIONAL