J&E Hall JEHSD-0400-B3-M-3, Техническое руководство

Страница: 18 / 44

Issue: 01.08.2020 Page 18
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.
•
Mechanical bypass switch on the control panel is 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 21 should be checked/altered as required:
Running the unit
•
Switch unit on at controller (see page 22).
•
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 suction superheat. This should be between 10K and 20K at normal operating
conditions.
•
Final adjustment of controller settings.
•
Allow the system to run for 3 – 4 hours. Check compressor oil level and top up with the correct oil
type as required (see page 4). Recheck the compressor oil level again after 24 hours operation.
•
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.
•
Complete refrigerant labelling to comply with F-Gas regulations.
•
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.