York Millennium YCAS 310, Установка, эксплуатация и обслуживание

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YORK INTERNATIONAL
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plicable, pressing the key again displays the values for
Systems 3 and 4 on larger models:
Display Limits: Maximum run hours 99,999
Maximum starts 99,999
Values roll over to zero if maximum limit is exceeded.
NOTE: These counters are zeroed at the factory but
may indicate run time and number of starts
logged during factory testing prior to shipment.
3.7 OPTIONS KEY & DIP SWITCH SETTINGS
The Options key provides a display of options which
are programmed by the positions of the S1 Dip Switches
on the Microprocessor Board. Proper programming of
the switches is important during the commissioning of
the chiller. The Options key can be used to verify the
Dip Switch positions without looking at or handling the
Microprocessor Board.
When the Options key is pressed, the following mes-
sage will first be displayed for three seconds:
Eight Option Messages will then be displayed in se-
quence, each for three seconds. At the end of the se-
quence the display will automatically revert to the cur-
rent chiller Status message, as if the Status key had
been pressed.
The following is a detailed guide to programming the
Dip Switches together with the associated message
display given for each selection when the Options key
is pressed:
SWITCH 1: Water / Brine Cooling
Open:
Water Cooling Mode is for water cooling applications
and allows the chilled liquid leaving temperature set-
3.5 % MOTOR CURRENT KEY
Pressing the Percentage Motor Current key a number
of times scrolls through displays of compressor cur-
rent for each system, ISN/EMS current limits and ISN
lag compressor start percentage. Example displays and
detailed explanations are as follows:
This display shows the average compressor motor cur-
rent and each individual phase current (L1, L2, and
L3) on each compressor as a percentage of FLA. All
values are approximate.
Demand limiting can be accomplished remotely by a
YORK ISN system or an external PWM (dry contact
closure) from an EMS system. This display shows the
% current limiting that may be in effect from these de-
vices. See Section 2.2, for more details.
This display indicates the ISN (Remote Buiding Auto-
mation System) programmed value of lead comxpressor
current (%FLA) at which the lag compressor will start.
See Section 8.2, for more details.
This display shows the % FLA current as measured by
the 3 C.T.s on each system together with the equiva-
lent full load amps. Values are approximate.
NOTE: Due to typical large variations in discharge
pressure, a compressor running “fully loaded”
may run at a wide range of currents and %
FLAs. Also FLA is approximately equal to 1.2
x RLA. This means amps equal to RLA of the
compressor will only be approximately 80%
FLA.
3.6 OPERATING HRS / START COUNTER KEY
When the Operating Hours / Starts Counter key is
pressed the accumulated running hours and starts for
System 1 and 2 compressors are displayed. Where ap-
T H E F O L L O W I N G
A R E P R O G R A M M E D
W A T E R
C O O L I N G
C O M P # = A V G ; P H L , 1 , 2 , 3
1 0 0 ; 9 9 , 1 0 1 , 1 0 1 % F L A
I S N C R N T L I M I T : N O N E
E M S C R N T L I M I T : N O N E
I S N L A G C O M P R E S S O R
S T A R T % N O N E
C O M P # = 2 8 1 A M P S 1 0 0 % F L A
C O M P # = 2 7 5 A M P S
9 9 % F L A
H R S 1 = 1 1 4 3 , 2 = 1 3 8 2
S T R 1 = 2 8 5 , 2 = 3 2 2
H R S 3 = 1 2 5 5 , 4 = 1 0 9 5
S T R 3 = 3 6 5 , 4 = 4 5 5