York MILLENIUM YCAS Series, Installation Operation & Maintenance, Page: 94 / 156

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YORK INTERNATIONAL
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5. Program the required operating values into the
micro for cut-outs, safeties, etc. and record them
in the chart below. See Page 137 for details.
If Default Values are desired for programming
convenience, press the PROGRAM key, 6140,
and ENTER. This loads default values. Record
these values in the chart below.
PROGRAMMED VALUES
Refrigerant Type = __________________________
Dischg Press Cut-out = ______________ kPa (PSIG)
Disch Press Unld = _________________ kPa (PSIG)
Suction Press Cut-out = _____________ kPa (PSIG)
High Amb Cut-Out = ___________________ °C (°F)
Low Amb Cut-Out = ___________________ °C (°F)
Leaving Chilled Liquid Temp Cut-Out = _____ °C (°F)
High Motor Current Unload = _____________ % FLA
Anti-Recycle Time = ____________________ Secs
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6. Program the Chilled Liquid Setpoint/Range and
record:
Setpoint = __________________ °C (°F )
Range = ________ to ________ °C (°F )
Keep in mind that the Target temperature dis-
played by the micro should equal the desired
leaving water temperature.
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7. Assure that the CLK jumper J18 on the Micro-
processor Board is in the ON position (Top 2
pins).
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8. Set the Time and Date.
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9. Program the Daily Schedule start and stop times.
Panel Checks
(Power ON – Both System Switches “OFF”)
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1. Apply 3-phase power and verify its value (See
Fig. 8 and 9 pages 33 and 34).
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2. Apply 115VAC and verify its value on the ter-
minal block in the lower left of the Power Panel.
Make the measurement between terminals 5 and
2 (See Fig. 13, page 38). The voltage should be
/- 10%.
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3. Assure the heaters on each compressor are on.
Allow the compressor heaters to remain on a
minimum of 24 hours before start-up. This is
important to assure that no refrigerant is in the
compressor oil at start-up!
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4. Program the dip switches on the microproces-
sor board for the desired operating requirements.
See Fig. 40, Page 120. OPEN = Left side of
switch pushed down. CLOSED = Right side of
switch pushed down.
Verify the selections by pressing the OPTIONS
Key on the control panel. Check them off.
Damage to the chiller could result if
switches are improperly programmed.
Dip switches 4 through 8 are spares
and have no function.
SWITCH
SWITCH “OPEN” SWITCH “CLOSED”
SETTING SETTING
1 Water Cooling Brine Cooling
2
Standard Ambient Low Ambient
Control Control
3 Refrigerant R-407C Refrigerant R-22
Technical Data