Unit Switch; To Start Unit In Local Mode; To Stop The Unit; To Reset Control Center - York MILLENNIUM YIA-ST-1A1 Operation Manual

UNIT SWITCH

(See Fig. 11, page 98).
This rocker switch is used to locally operate the unit. It is
used to start, run and stop the unit. Also, it resets the
Control Center after a safety shutdown.

To START unit in LOCAL mode:

Move the UNIT switch from the STOP/RESET to
the START position. Switch will spring-return to
RUN position.

To STOP the unit:

Move switch from the RUN to the STOP/RESET
position.

To RESET Control Center:

Following a safety shutdown, the operator is re-
quired to reset the Control Center prior to restart-
ing the system. Move switch from the RUN to the
STOP/RESET position.
NOTE: The operator cannot start the unit (using this
switch) when the Control Center is in the RE-
MOTE mode.

DISPLAY MESSAGES

SYSTEM READY TO START:
SYSTEM READY TO START
System has no status message to report and will start
when a start signal is applied.
SYSTEM READY TO START – DILUTION
Same as above, but a dilution cycle is in progress.
SYSTEM READY TO START – PRESS STATUS
System will start when a start signal is applied. The op-
erator is instructed to press the STATUS key to view a
status message.
SYSTEM READY TO START – DIL'N – PRESS STATUS
Same as above, but dilution cycle is in progress.
YORK INTERNATIONAL
SYSTEM READY TO START – UNIT HOLDING
– or –
SYSTEM READY TO START – UNIT LOADING
– or –
SYSTEM READY TO START – UNIT LOADED
– or –
SYSTEM READY TO START – UNIT UNLOADING
– or –
SYSTEM READY TO START – UNIT UNLOADED
Control Center is in SERVICE mode. The system will
start when a start signal is applied. It is in the process of
holding, loading, or unloading or is in the fully loaded or
unloaded position.
SYSTEM START SEQUENCE:
COOLING START INITIATED
The system has received a start signal but has not yet
achieved the run state.
SYSTEM RUN:
(All steam/hot water valve loading limits (strong solution
temperature limit, automatic decrystallization limit, re-
mote load limit, maximum load limit), when active, will
automatically be scrolled on the display one after an-
other should two or more be in effect simultaneously.
For example, if the automatic decrystallization limiting is
in effect and the steam/hot water valve is at the pulldown
limit, the display will flash between the following two
messages so long as the two limits are in effect: SYS-
TEM RUN – AUTOMATIC DECRYSTALLIZATION, and
SYSTEM RUN – PULL DOWN LIMIT.)
SYSTEM RUN – PRESS STATUS
The system is running in LOCAL, REMOTE or SER-
VICE mode. The operator is instructed to press the STA-
TUS key to display a status message.
FORM 155.16-O3
103