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Initial Startup
JOB NAME: ______________________________
SALES ORDER #: _________________________
LOCATION: _______________________________
SOLD BY: ________________________________
INSTALLING
CONTRACTOR: ___________________________
START-UP
TECHNICIAN/
COMPANY: _______________________________
START-UP DATE : _________________________
UNIT MODEL #: ____________________________
SERIAL #: ________________________________
CHECKING THE SYSTEM
PRIOR TO INITIAL START (No Power)
Unit Checks
G 1. Inspect the unit for shipping or installation
damage.
G
2. Assure that all piping has been completed.
G 3. Visually check for refrigerant piping leaks.
G 4. Open suction line ball valve, discharge line ball
valve, and liquid line valve for each system.
G 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 com-
pressor is running in stabilized conditions, guar-
anteeing that there is no liquid refrigerant in the
lower shell of the compressor. In this case, the
oil must 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.
G 6. Verify proper CFM of air across evaporator coil.
Verify air flow switch operation.
G 7. Check the control panel to assure it is free of
foreign material (wires, metal chips, etc.).
G 8. Visually inspect wiring (power and control). Wir-
ing MUST meet N.E.C. and local codes.
G 9. Check tightness of power wiring inside the power
panel on both sides of the motor contactors.
G 10. Check for proper size fuses in main and control
circuits.
G 11. Assure 120VAC Control Power to CTB2 has 15A
minimum capacity. See Table 7.
92
PRE-STARTUP CHECKLIST
G 12. Be certain field wiring for discharge air sensor,
PANEL CHECKS
(Power ON – Both Unit Switches OFF)
G 1. Apply 3-phase power and verify its value. Volt-
G 2. Apply 120VAC and verify its value on the termi-
G 3. Program/verify the Cooling Setpoints, Program
G
G 5. Prior to this step, turn system 2 off (if applicable
TABLE 10 – SETPOINTS
OPTIONS
Display Language
Sys 1 Switch
Sys 2 Switch
Unit Type
Ambient Control
Local/ Remote Mode
Control Mode
Display Units
Lead/Lag Control
Fan Control
Manual Override
COOLING SETPOINTS
Cooling Setpoint
Range
EMS-PWM Max. Setpoint
PROGRAM
Discharge Pressure Cutout
Suct. Pressure Cutout
Low Amb. Temp. Cutout
Anti-Recycle Time
Fan Control On-Pressure
Fan Differential Off-Pressure
Total # of Compressors
liquid line solenoid valves, and zone thermostats
(if applicable) and air proving switches have been
correctly wired.
age imbalance should be no more than 2% of the
average voltage.
nal block in the Power Panel. Make the measure-
ment between terminals 5 and 2 of CTB2. The
voltage should be 120VAC +/- 10%.
Setpoints, and unit Options. Record the values
below (see sections on Setpoints and Unit keys
for programming instruction).
4. Put the unit into Service Mode (as described un-
der the Control Service And Troubleshooting sec-
tion) and cycle each condenser fan to ensure
proper rotation.
- refer to Option 2 under "Unit Keys" section for
more information on system switches.) Connect
a manifold gauge to system 1 suction and dis-
charge service valves.
YORK INTERNATIONAL
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