YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls
YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls
YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls
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FORM 201.28-NM1.1<br />
ISSUE DATE: 8/29/2012<br />
The next key press displays the compressor speed in<br />
% (0 to100%) and the compressor heater status (ON<br />
or OFF)<br />
SYS 1 COMPRESSOR SPEED = XXX.X %<br />
HEATER = XXX<br />
The next key press indicates the flash tank level low/<br />
high and the economizer valve % open.<br />
SYS 1 FLASH TANK LEVEL = XXX.X %<br />
ECONOMIZER VALVE = XXX.X %<br />
The next key press displays the condenser liquid line<br />
subcooling and the drain valve position.<br />
SYS 1 CONDENSER SUBCOOLING = XXX.X °F<br />
CONDENSER DRAIN VALVE = XXX.X %<br />
The next key press indicates the number of condenser<br />
fans steps that are enabled (1 to 4), if the fans are not<br />
operating on a VSD.<br />
SYS 1 CONDENSER FANS ON = X<br />
If the fans are controlled by an optional VSD, the display<br />
will indicate fan speed signal control voltage to<br />
the VSD and the fan speed (0 to 100%).<br />
SYS 1 CONDENSER FANS ON = X<br />
VSD FAN SPEED = XX.X V = XXX %<br />
SECTION 8 - MICROPANEL<br />
The next key press will indicate the state of the optional<br />
VI solenoids where XXX indicates ON or OFF.<br />
SYS 1 VI STEP SOLENOID 1 = XXX<br />
VI STEP SOLENOID 2 = XXX<br />
The next key press displays the system run time in<br />
days, hours, minutes and seconds.<br />
SYS 1 RUN TIME<br />
XX DAYS XX HOURS XX MINUTES XX SECONDS<br />
The next key press indicates the status of the RUN Relay<br />
where XXX is ON or OFF, the status of the RUN<br />
Permissive signal (flow switch/remote start/stop circuit<br />
2 and 15 of 1TB, SYS 1) or 2 and 16 of 1TB, SYS 2)<br />
and whether the internal software is telling the system<br />
to run (ON or OFF)<br />
SYS 1 RUN SIGNALS RELAY = XXX<br />
RUN PERM = XXX SOFTWARE = XXX<br />
System 2 Data Key Operation<br />
System 2 keys function the same as the SYSTEM 1<br />
DATA key except that it displays data for System 2.<br />
On a 2 compressor system, the SYSTEM 3 and SYS-<br />
TEM 4 data keys will display the following messages:<br />
SYS 3 DATA NOT AVAILABLE<br />
SYS 4 DATA NOT AVAILABLE<br />
JOHNSON CONTROLS 101<br />
8