York YLUA0248 Series Installation Operation & Maintenance Download

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JOHNSON CONTROLS

SECTION 6 – COMMISSIONING

FORM 150.73-NM2

ISSUE DATE: 09/07/2020

JOHNSON CONTROLS

NEW RELEASE

INSTALLATION AND START-UP CHECKLIST

YLUA

Form 150.73-CL2 (1012)

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

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. ....

B. COMPRESSOR HEATERS

(Power On – 24 Hours Prior To Start)

1. Apply 120VAC and verify its value between

terminals 5 and 2 of XTBC2. The voltage should
be /- 10%. ..........................................

2. Power must be applied 24 hours prior to

start-up. ..............................................................

3. Each heater should draw approximately 0.5-1A. ..

C. 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 average voltage. ......................................

2. Apply 120VAC and verify its value on the

terminal block in the Power Panel. Make the
measurement between terminals 5 and 2 of
XTBC2. The voltage should be /-
10%. ...................................................................

A. UNIT CHECKS

(Checking the system prior to initial start - no

power).

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 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

foreign 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

circuits, and verify overload setting corresponds
with RLA and FLA values in electrical tables. ....

11. Assure 120VAC Control Power to TB1 has

15 amp minimum capacity. ................................