System Startup Checklist; Unit Checks - York YCAS0098EB Installation Operation & Maintenance

Technical Data
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 #: _______________________________
Unit Checks (No Power)
Check the system 24 hours prior to initial start
1. Inspect the unit for shipping or installation

damage.
2. Assure that all piping has been completed.

3. Check that the unit is properly charged and that

there are no piping leaks.
4. Open each compressor suction service valve,

discharge service valve, economizer service
valve, liquid line stop valve, and oil line ball
valves.
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
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.
118

SYSTEM STARTUP CHECKLIST

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.
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 oil charging valve on the
oil separator and pump in oil until it reaches the
proper level as described above.
6. Assure water pumps are on. Check and adjust

water pump flow rate and pressure drop across
the cooler.
Excessive flow may cause catastrophic
damage to the evaporator.
7. Check the control panel to assure it is free of

foreign material (wires, metal chips, etc.).
8. Visually inspect wiring (power and control).

Wiring MUST meet N.E.C. and local codes. See
Fig. 8 and 9, pages 35 and 36.
9. Check tightness of power wiring inside the power

panel on both sides of the motor contactors and
inside the motor terminal boxes.
10. Check for proper size fuses in main and control

circuits.
11.Verify that field wiring matches the 3-phase pow-

er requirements of the compressor. See chiller
nameplate (Pages 25 - 26).
12. Assure 115VAC Control Power has 30A mini-

mum capacity. See Fig. 13, page 40.
13. Be certain all water temp sensors are inserted

completely in their respective wells and are
coated with heat conductive compound.
14.Assure that evaporator TXV bulbs are strapped

onto the suction lines at 4 or 8 o'clock positions.
15. Assure that the 15 ton economizer TXV bulbs

are strapped onto the compressor economizer
supply lines at 4 or 8 o'clock positions.
JOHNSON CONTROLS