York Millennium YCAS 216X, Installation Operation & Maintenance

Page: 134 / 144

134
YORK INTERNATIONAL
PANEL CHECKS
(Power On – Both System Switches “OFF”)
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1. Apply 3 phase power and verify its value (See
Fig. 20).
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2. Apply 115VAC and verify its value on the termi-
nal block in the lower left of the Power Panel.
Make the measurement between terminals 5 and
2 of TB1 (See Fig. 20.). 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 mini-
mum of 24 hours before startup. This is impor-
tant to assure that no refrigerant is in the com-
pressor oil at start-up!
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4. Program the dip switches on the microprocessor
board for the desired operating requirements. See
Page 80. OPEN = Left side of switch pushed down.
CLOSED = Right side of switch pushed down.
SW# OPEN CLOSED
1 Water Brine
2 Std Amb Low Amb
3 Local Remote
4 N/A N/A
5 English SI (Metric)
6 ACL Start W-D Start
7 M Lead/Lag A Lead/Lag
8 R- 1 34a R-22
Verify the selections by pressing the OPTIONS
Key on the control panel. Check them off.
CAUTION: Damage to the chiller could result if
switches are improperly programmed.
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5. Program the required twenty-two operating val-
ues into the micro for cut-outs, safeties, etc. and
record them in the chart below. See Page 88.
If Default Values are desired for programming con-
venience, 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 = _______________ PSIG (kPa)
Low Amb Cut-out = ______________________ °F (°C)
High Amb Cut-out = ______________________ °F (°C)
Disch Press Unld = ___________________ PSIG (kPa)
Avg Current Unld = ________________________ %FLA
Anti Recycle Time = _______________________ Secs
LWT Cut-out = ___________________________ °F (°C)
Suction Press Cut-out = _______________ PSIG (kPa)
Lag Cmpr Start Point = ____________________ %FLA
Lag Compr Diff Off = ______________________ %FLA
Fan Dsch Press Setpt = _______________ PSIG (kPa)
Fan On/Off Press Diff = _______________ PSIG (kPa)
Sys 1 Curr = 100 %FLA = _________________ AMPS
Sys 2 Curr= 100 %FLA = __________________ AMPS
Liq Inj Temp Limit = ______________________ °F (°C)
Sys 1 Cond Tmp = ________________ °F (°C) = 100%
Sys 2 Cond Tmp = ________________ °F (°C) = 100%
Com Mode = ISN ___________ or RCC ___________
Load Share = SV% __________ or %FLA __________
Econ Valve On Point = __________________________
Econ Valve Off Point = __________________________
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6. Program the Chilled Liquid Temp/Range and
record:
CR = ________ to _________ °F (°C)
Target = ____________ °F (°C)
Keep in mind that the Target temperature dis-
played by the micro should equal the desired leav-
ing water temperature.
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7. Assure that the CLK jumper J18 on the Micropro-
cessor 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.
INITIAL START-UP
After the control panel has been programmed and the
compressor heater has been on for 24 hours prior to
start-up, the chiller may be placed into operation.
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1. Place the System Switches on the Microproces-
sor Board to the ON position.