York Millennium YCAS 310, Установка, эксплуатация и обслуживание

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YORK INTERNATIONAL
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3. DISPLAY KEYS & OPTION SWITCHES
28164(b)A
DISPLAY KEYS
3.1 GENERAL
The Display keys give direct access to commonly re-
quired data about the operation of the chiller. This is
particularly useful during commissioning, monitoring the
operation of the chiller, diagnosing potential future prob-
lems and service troubleshooting.
When a Display key is pressed, the corresponding
message will be displayed and will remain on the dis-
play until another key is pressed.
Displayed data is in “real-time” and is updated approxi-
mately every 2 seconds. If updating of one of the mes-
sages is required faster than every 2 seconds, the ap-
propriate key for the desired display can be pushed
and held to give updating every 0.4 seconds.
Display messages may show characters indicating
“greater than” (>) or “less than” (<). These characters
indicate the actual values are greater than or less than
the values which are being displayed but are outside
the ability of the micro to give an actual reading. This is
unlikely to occur unless a fault exists in the measuring
sensors or during extreme conditions.
The Display keys and the data available from each is
as follows:
3.2 CHILLED LIQUID TEMPS KEY
When the Chilled Liquid Temperatures key is pressed
a display of chilled liquid temperatures leaving the chiller
(LWT) and returning to the chiller (RWT) is provided as
follows:
YCAS Models:
YDAS Models:
On YDAS chillers a display indicating the chilled liquid
temperature leaving the individual master (LWT1) and
subrodinate
(LWT2) evaporators is provided when the
key is first pressed:
Pressing the key again changes the display to mixed
chilled leaving liquid temperature and return liquid tem-
perature.
Display limits: Minimum 9.1°F
Maximum 84.2°F
L W T = 4 9 . 2 ° F
R W T = 5 2 . 0 ° F
L W T 1 = 4 9 . 4 ° F
L W T 2 = 4 9 . 6 ° F
M I X E D L W T 4 9 . 5 ° F
R W T = 5 2 . 0 ° F