J&E Hall JEHSD-0600-M-3, Technical Manual

Page: 15 / 40

Issue: 01.05.2017 Page 15
Commissioning
Pre Startup Checks
Before starting the condensing unit the following checks should be carried out as a minimum:
•
Check electrical supply is correct and all connections are sound.
•
All moving parts are free and guards fitted.
•
Compressor oil level satisfactory.
•
Both of the mechanical bypass switches on the control panel are in the OFF (0) position.
•
LCD display cable is connected to the controller to enable settings.
•
Check setting of LP back up control (factory set).
•
Overload set correctly.
•
All valves in correct operating position.
•
Initial refrigerant charge.
•
Crankcase heater energized for a minimum of 12 hours before compressor start-up.
•
Gauge manifold connected to both low and high sides of system.
Before running the unit, the controller settings on page 18 should be checked/altered as required:
Running the Unit
•
Switch unit on at controller (see page 19).
•
Run the unit and check compressor and condenser fan operation.
•
Check system pressures and temperatures, gas charge and running currents of motors to ensure
correct operation.
•
Check transducer/sensor readings are accurate (calibrated equipment required ).
•
Check compressor superheats.
•
Final adjustment of controller settings.
•
Check compressor oil level and adjust as necessary.
•
Carry out final leak test and ensure all panels/covers are fitted and screws tightened.
•
Log all information along with the system model and serial numbers for future reference.
•
Ensure that the customer / responsible person are provided with basic operating instructions and
where electrical isolators are situated in case of emergency.
Please wait for 1 minute for controller loading after switching on the main isolator.