York Millennium YCAS 316, Installation Operation & Maintenance, Page: 133 / 144

FORM 201.10-NM1
133
YORK INTERNATIONAL
SYSTEM STARTUP CHECKLIST
JOB NAME: __________________________________
SALES ORDER #: _____________________________
LOCATION: ___________________________________
SOLD BY: ____________________________________
INSTALLING
CONTRACTOR: _______________________________
START-UP
TECHNICIAN/
COMPANY: ___________________________________
START-UP DATE : ______________________________
CHILLER MODEL #: ___________________________
SERIAL #: ____________________________________
COMPRESSOR #1
MODEL#: ____________________________________
SERIAL #: ____________________________________
COMPRESSOR #2
MODEL#: ____________________________________
SERIAL #: ____________________________________
CHECKING THE SYSTEM 24 HOURS
PRIOR TO INITIAL START (No Power)
Unit Checks
q
1. Inspect the unit for shipping or installation dam-
age.
q
2. Assure that all piping has been completed.
q
3. Check that the unit is properly charged and that
there are no piping leaks.
q
4. Open each compressor suction service valve,
discharge service valve, economizer service
valve, liquid line stop valve, and oil line ball valves.
q
5. The compressor oil level should be maintained
so that an oil level is visible in either of the two
oil separator sight glasses. In other words, oil
level should always be maintained, running or not,
above the bottom of the lower sight glass and
below the top of the upper sight glass.
NOTE: In actual operation, due to splashing, an
oil level may be seen in both sight glasses.
Run the compressor for a few minutes,
shut the system down, and assure there
is an oil level showing in the bottom or
top sight glass with the compressor off.
If it is necessary to add oil, connect a YORK oil
pump to the charging valve on the oil separator,
but do not tighten the flare nut on the delivery
tubing. With the bottom (suction end) of the pump
submerged in oil to avoid entrance of air, operate
the pump until oil drips from the flare nut joint,
allowing the air to be expelled, and tighten the
flare nut. Open the compressor oil charging valve
and pump in oil until it reaches the proper level
as described above.
q
6. Assure water pumps are on. Check and adjust
water pump flow rate and pressure drop across
the cooler.
NOTE: Excessive flow may cause catastrophic
damage to the evaporator
q
7. Check the control panel to assure it is free of
foreign material (wires, metal chips, etc.) .
q
8. Visually inspect wiring (power and control). Wir-
ing MUST meet NEC and local codes. See Fig.
20.
q
9. Check tightness of power wiring inside the power
panel on both sides of the motor contactors and
inside the motor terminal boxes.
q
10. Check for proper size fuses in main and control
circuits.
q
11. Verify that field wiring matches the 3-phase power
requirements of the compressor. See chiller name-
plate (Page 4).
q
12. Assure 115VAC Control Power to TB1 has 30A
minimum capacity. See Fig. 20.
q
13. Be certain all water temp sensors are inserted
completely in their respective wells and are coated
with heat conductive compound.
q
14. Assure that evaporator TXV bulbs are strapped
onto the suction lines at 4 or 8 o’clock positions.
q
15. Assure that 5 ton TXV bulbs are inserted fully
into the wells in the compressors and that the
bulbs are coated with heat conductive compound.
q
16. Assure that the 15 ton economizer TXV bulbs
are strapped onto the compressor economizer
supply lines at 4 or 8 o’clock positions.