JOHNSON CONTROLS
95
SECTION 6 – COMMISSIONING
FORM 150.27-NM1
ISSUE DATE: 09/30/2015
6
JOB NAME: ______________________________
SALES ORDER #: _________________________
LOCATION: ______________________________
SOLD BY: ________________________________
INSTALLING
CONTRACTOR: ___________________________
START-UP
TECHNICIAN/
COMPANY: _______________________________
START-UP DATE : _________________________
CHILLER MODEL #: _______________________
SERIAL #: ______________________________
Pre Start-up
Checking The System
Prior To Initial Start (No Power)
Unit Checks
1. Inspect the unit for shipping or installation dam-
age.
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 sight glass.
6. Ensure water pumps are on. Check and adjust
water pump flow rate and pressure drop across
the cooler (see
). Verify flow switch
operation.
Excessive flow may cause catastrophic
damage to the heat exchanger (evapora-
tor).
7. Check the control panel to ensure it is free of
foreign material (wires, metal chips, etc.).
EQUIPMENT PRE START-UP AND START-UP CHECKLIST
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 contac-
tors and overloads.
10. Check for proper size fuses in main and con-
trol circuits, and verify overload setting corre-
sponds with RLA and FLA values in electrical
tables.
11. Ensure 120VAC Control Power to TB1 has 15
amp minimum capacity.
12. Be certain all water temp sensors are inserted
completely in their respective wells and are
coated with heat conductive compound.
13. Ensure that evaporator TXV bulbs are strapped
onto the suction lines at 4 or 8 o’clock posi-
tions or suction temp. sensors if EEVs are in-
stalled.
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%.
Power must be applied 24 hours prior to
start-up.
Each heater should draw approximately
0.5 to 1A.
Start-up
Panel Checks
(Power On – Unit switch Off)
1. Apply 3-phase power and verify its value. Volt-
age imbalance should be no more than 2% of
the average voltage.
2. Apply 120VAC and verify its value on the termi-
nal block in the power panel. Make the measure-
ment between terminals 5 and L of CTB2. The
voltage should be 120VAC plus or minus 10%.
3. Program/verify the Cooling Setpoints, Program
Setpoints, and Unit Options. Record the values
below in Table 13. (See
and
ming instruction)
