York YCUL0020, Installation, Operation And Maintenance Manual

Page: 105 / 178

JOHNSON CONTROLS
105
SECTION 6 – COMMISSIONING
Form 150.63-NM9
Issue date: 5/20/2021
6
JOHNSON CONTROLS
1
STARTUP CHECKLIST
AIR-COOLED SCROLL
COMPRESSOR CONDENSING UNITS
Supersedes: 150.63-CL2 (1013)
Form 150.63-CL2 (319)
EQUIPMENT PRE-STARTUP AND STARTUP CHECKLIST
The following work must be completed in accordance with installation instructions:
CUSTOMER: ____________________________________
ADDRESS: _____________________________________
PHONE: ________________________________________
JCI TEL NO: _____________________ JCI ORDER NO: __________________ JCI CONTRACT NO: ______________
JOB NAME: ____________________________________
LOCATION: ____________________________________
CUSTOMER ORDER NO: _________________________
CHILLER MODEL NO : ____________________________
The work (as checked below) is in process and will be completed by: _____________ / ____________ /
___________
UNIT SERIAL NO : _______________________________
Month Day Year
13. Verify that TXV bulbs are strapped onto the suction
lines at 4 or 8 o’clock positions or suction tempera-
ture sensors if EEVs are installed. ..........................
B. Compressor Heaters
(Power on – 24 Hours Prior To Start)
Apply 120 VAC and verify its value be-
tween terminals 5 and 2 of TB1. The volt-
age should be 120 VAC plus or minus 10%.
Power must be applied 24 hours prior to start-up.
Each heater should draw approximately 0.5-1 A. ........
C. Startup
Panel Checks
(Power On – Both Unit Switch Off)
1. Apply 3-phase power and verify its value. Voltage
imbalance should be no more than 2% of the aver-
age voltage. .............................................................
2. Apply 120 VAC and verify its value on the terminal
block in the Power Panel. Make the measurement
between terminals 5 and 2 of TB1. The voltage
should be 120 VAC plus or minus 10%. ..................
3. Program/verify the cooling setpoints, program
setpoints, and unit options. Record the values in
Table 11 (see sections on Setpoints and Unit Keys
for programming instruction in Table 16 and 17). ....
4. Put the unit into Service Mode (as described under
the Control Service and Troubleshooting section)
and cycle each condenser fan to ensure proper ro-
tation. .....................................................................
5. Prior to this step, turn system 2 OFF (if applicable –
refer to Option 2 under “UNIT keys” in section 7 for
more information on system switches). Connect a
manifold gauge to system 1 suction and discharge
service valves. ........................................................
A. Pre-Startup
Checking the System Prior To Initial Start (No Power)
Unit Checks
1. Inspect the unit for shipping or installation dam-
age. .........................................................................
2. Ensure that all refrigerant piping has been complet-
ed and is correctly designed. ..................................
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 or splashing in the sight
glass when fully loaded. At shutdown, the oil level
should be between the bottom and middle of the oil
equalizing sight glass. .............................................
6. Verify proper CFM of air across evaporator coil.
Verify air flow switch operation. ...............................
7. Check the control panel to ensure it is free of for-
eign material (wires, metal chips, etc.). ...................
8. Visually inspect wiring (power and control). Wiring
MUST meet N.E.C. and local codes. ......................
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 cir-
cuits, and verify overload setting corresponds with
RLA and FLA values in electrical tables. .................
11. Ensure 120 VAC Control Power to TB1 has 15 amp
minimum capacity. ...................................................
12. Be certain all temp sensors are installed correctly. .
Equipment Pre-Startup and Startup Checklist