York MILLENNIUM YCAL0043SC, Manual

Page: 48 / 133

YORK INTERNATIONAL
48
PRE-STARTUP CHECKLIST
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9. Check tightness of power wiring inside the power
panel on both sides of the motor contactors and
overloads.
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10. Check for proper size fuses in main and control
circuits, and verify overload setting corresponds
with RLA and FLA values in electrical tables.
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11. Assure 115 VAC Control Power to CTB2 has 15
AMP minimum capacity. See Table 1, page 19.
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12. Be certain all water temp sensors are inserted
completely in their respective wells and are coated
with heat conductive compound.
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13. Assure that evaporator TXV bulbs are strapped
onto the suction lines at 4 or 8 o’clock positions.
PANEL CHECKS
(Power ON – Both Unit Switch OFF)
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1. Apply 3-phase power and verify its value. Volt-
age imbalance should be no more than 2% of the
average voltage.
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2. Apply 115 VAC and verify its value on the termi-
nal block in the Power Panel. Make the measure-
ment between terminals 5 and 2 of CTB2. The
voltage should be /- 10%.
JOB NAME: ______________________________
SALES ORDER #: _________________________
LOCATION: _______________________________
SOLD BY: ________________________________
INSTALLING
CONTRACTOR: ___________________________
START-UP
TECHNICIAN/
COMPANY: _______________________________
START-UP DATE : _________________________
CHILLER MODEL #: _______________________
SERIAL #: ________________________________
CHECKING THE SYSTEM
PRIOR TO INITIAL START (No Power)
Unit Checks
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1. Inspect the unit for shipping or installation
damage.
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2. Assure that all piping has been completed.
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3. Visually check for refrigerant piping leaks.
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4. Open suction line ball valve, discharge line ball
valve, and liquid line valve for each system.
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5. The compressor oil level should be maintained
so that an oil level is visible in the sight glass.
The oil level can only be tested when the com-
pressor is running in stabilized conditions, guar-
anteeing that there is no liquid refrigerant in the
lower shell of the compressor. In this case, the
oil must be between 1/2 and 3/4 in the sight glass.
At shutdown, the oil level can fall to the bottom
limit of the oil sight glass.
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6. Assure water pumps are on. Check and adjust
water pump flow rate and pressure drop across
the cooler (see LIMITATIONS). Verify flow switch
operation.
NOTE: Excessive flow may cause catastrophic
damage to the evaporator.
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7. Check the control panel to assure it is free of
foreign material (wires, metal chips, etc.).
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8. Visually inspect wiring (power and control). Wir-
ing MUST meet local codes. See Figures 2 - 5.
OPTIONS
Display Language
Sys 1 Switch
Sys 2 Switch
Unit Type
Chilled Liquid
Ambient Control
Local/ Remote Mode
Control Mode
Display Units
Lead/Lag Control
Fan Control
Manual Override
COOLING SETPOINTS
Cooling Setpoint
Range
EMS-PWM Max. Setpoint
PROGRAM
Discharge Pressure Cutout
Suct. Pressure Cutout
Low Amb. Temp. Cutout
Leaving Liquid Temp. Cutout
Anti-Recycle Time
Fan Control On-Pressure
Fan Differencial Off-Pressure
Total # of Compressors
TABLE 22 – SETPOINTS
Installation