HRAT E - HRAT/HRAN
28
English 09/02
CHECKING AND STARTING UP THE UNIT
PREPARING FOR FIRST START UP
The chiller must be started up for the first time by the
Technical Assistance Service. Before starting up the chillers,
make sure that:
- All safety conditions have been respected;
- The chiller is adequately fixed to the surface it rests on;
- Functional distances have been respected;
- Hydraulic connections have been carried out as indicated
in the instruction manual;
- The hydraulic circuit is filled and vented;
- The hydraulic circuit cocks are open;
- Electrical connections have been carried out correctly
- Voltage is within a tolerance of 10% of the rated voltage
for the unit;
- The unit is correctly earthed;
- All electrical connections are tight and all hydraulic con-
nections have been carried out correctly.
The unit must be started up for the first time with
standard settings. Set point values may be modified
only after testing has been completed. Before start-
ing up, power up the unit for at least two hours by
positioning QF1 and QS1 to ON and setting the
control panel “HSW3” to OFF to allow the oil in
the compressor sump to heat up.
STARTING UP FOR THE FIRST TIME (after two hours)
Before activating the chiller:
- Make sure the general switch QF1 is in the OFF position
- Make sure the secondary remote switch SA1 (if present)
is in the OFF position
- Make sure the remote keyboard “A6” (if present) is set to OFF
- Remove the inspection panel
- Open the door of the electrical panel, turning QS1 to OFF
- Place the compressor thermal overload switch QM1 in
the ON position
- Close the electrical panel and tighten the closing screws
- Position the main unit switch QS1 in the ON position
- Replace the inspection panel
- Position the general installation switch QF1 (outside the
unit) in the ON position
- The “POWER” LED on the “HSW3” control panel lights
up to indicate the presence of voltage.
OFF
ON
ON
OFF
OFF
ON
A
