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II.11 Start-up procedure
IMPORTANT!
Machine commissioning or the first start up (where provided for) must
be carried out by skilled personnel from workshops authorised by
HITECSA, qualified to work on this type of products.
IMPORTANT!
The use and maintenance manuals for the pumps, fans and safety
valves are attached to this manual and should be read throughout.
DANGER!
Before starting up, make sure that the installation and electrical
connections conform with the instructions in the wiring diagram. Also
make sure that there are no unauthorized persons near the unit during
the aforementioned operations.
DANGER!
The units are equipped with safety valves located inside the technical
compartment and coil compartment. When they trip, they cause a loud
noise and violent refrigerant and oil leaks. Do not approach the safety
valve tripping pressure value. The safety valves can be channelled in
accordance with that stipulated by the valve manufacturers.
IMPORTANT!
A few hours before starting up the unit (at least 12), supply power to
the machine in order to power the electrical resistances designed to
heat up the compressor intake pipe. Each time the unit starts up the
crankcase resistances switch off automatically.
DANGER!
By removing the protection panel from the coil/fan compartment,
the unit electrical supply is completely interrupted. Be careful of any
possible rotation of the fan blades caused by traction or inertia.
Once the unit installation and connection operations have been completed, the unit can be started up for the first time. For a correct first start-up of the
unit carefully follow the diagrams provided in the following paragraphs.
General unit conditions
START
Have the technical clearance distances indicated in the manual been
respected?
Are the coils free from obstructions?
Are the fan grilles free from obstructions?
Is the unit damaged due to transport/installation?
The general conditions of the unit are compliant!
EQPI3X
YES
YES
YES
NO
II.11.1 Start-up instructions
Configuration parameters
Summer working temperature setting
Antifreeze temperature set point
Antifreeze temperature differential
Low pressure exclusion time upon
start-up/ in function
Press. exclusion time water differential on
start-up/in operation
Pump switch-off delay time
Anticipation time pump ignition
Minimum time between 2 consecutive compressor start-ups of these
Before starting the unit, perform the following checks:
• the electrical supply must comply with the specifications on the data pla-
te and/or the wiring diagram and it must fall within the following limits:
o variation of the power supply frequency ±2 Hz;
o variation of the power supply voltage: ±15% of the nominal voltage;
ɱ imbalance between the supply phases: <2%.
• The electrical supply system must be able to supply adequate current
and be suitably sized to handle the load.
• open the electric panel and make sure the terminals of the power supply
and of the contactors are tight (they may have come loose during tran-
sport, which could lead to malfunctions).
IMPORTANT!
Electrical connections must be made in compliance with the local
installation standards in force in the place where the unit is installed,
and with the instructions in the wiring diagram provided with the
unit.
Restore the indicated technical spaces.
NO
Clean the coils.
NO
Remove the obstructions.
NO
Danger! Do not start the unit! Restore the unit!
YES
EN
Standard settings
7°C
3°C
2°C
60"/10"
15"/3"
30"
60"
360"
53
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