York YCAL0014E Series, Installation Operation & Maintenance

Page: 76 / 212

JOHNSON CONTROLS
76
FORM 150.62-NM8 (1020)
INSTALLATION
JOB NAME: ______________________________
SALES ORDER #: _________________________
LOCATION: ______________________________
SOLD BY: ________________________________
INSTALLING
CONTRACTOR: ___________________________
START-UP
TECHNICIAN/
COMPANY: _______________________________
START-UP DATE : _________________________
CHILLER MODEL #: _______________________
SERIAL #: ______________________________
Pre-Startup
Checking The System Prior To Initial Start
(No Power)
Unit Checks

1. Inspect the unit for shipping or installation
damage.

2. Assure that all piping has been completed.

3. Visually check for refrigerant piping leaks.

4. Open suction line ball valve, discharge line ball
valve, and liquid line valve for each system.

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 compressor
is running in stabilized conditions, guaranteeing
that there is no liquid refrigerant in the lower
shell of the compressor. In this case, the oil
should be between 1/4 and 3/4 in the sight glass.
At shutdown, the oil level can fall to the bottom
limit of the oil sight glass.

6. Assure water pumps are on. Check and adjust
water pump flow rate and pressure drop across
the cooler
(see Operational Limitations listed
earlier in this section of the IOM).
Verify flow
switch operation.
EQUIPMENT PRE-STARTUP AND STARTUP CHECKLIST
Excessive flow may cause catastrophic
damage to the evaporator.

7. Check the control panel to ensure 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. 2 through Fig. 5, pages 23 - 26.

9. Check tightness of power wiring inside the power
panel on both sides of the motor contactors and
overloads.

10. Check for proper size fuses in main and control
circuits, and verify overload setting corresponds
with RLA and FLA values in electrical tables.

11. Assure 120VAC Control Power to CTB2 has 15
amp minimum capacity. See Table 1, page 29.

12. Be certain all water temp sensors are inserted
completely in their respective wells and are
coated with heat conductive compound.

13. Assure that evaporator TXV bulbs are strapped
onto the suction lines at 4 or 8 o’clock positions
or suction temp. sensors if EEVs are installed.

14. Assure oil level in the compressor or oil line sight
glasses is between 1/4 and 3/4.

15. Check the tightness of the heaters on each
compressor. Tighten the heater if the heater
fingers do not touch the compressor housing.
Inspect the heater around the entire perimeter of
each compressor. The heater should be torqued
to 26 in./lbs., plus or minus 4 in./lbs.
Compressor Heaters
(Power On – 24 Hours Prior To Start)

1. Apply 120VAC and verify its value between
terminals 5 and 2 of CTB2. The voltage should
be 120VAC plus or minus 10%.
Each heater should draw approximately 0.5 to
1amp.
Power must be applied 24 hours prior
to startup.