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Idiomas disponibles
2.8. 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 of the fans and any safety valves are enclosed with this manual and should be read in their en-
tirety.
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 unauthorised persons in the vicinity of the machine during the above operations.
DANGER!
The units are equipped with safety valves. When they cut in, they cause a loud noise and violent refrigerant and oil leaks. Do not ap-
proach the safety valve tripping pressure value. Safety valves are conveyable in accordance with current regulations.
IMPORTANT!
A few hours before starting up the unit (at least 12), supply power to the machine in order to power the electrical resistances de-
signed to heat up the compressor crankcase. Each time the unit starts up the crankcase resistances switch off automatically.
IMPORTANT!
When starting the machine in PDC heat pump operation with an outside air temperature below 10°C, it is advisable to use an external
heating cable to be applied to the liquid separators to ensure the evaporation of the fluid contained therein.
Instructions for start-up
Configuration parameters
Summer working temperature setting
Antifreeze temperature setting
Antifreeze temperature differential
Low pressure exclusion time upon start-up/in function
Water differential pressure switch exclusion time upon start-up/when running
Delay time for pump shutdown
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 plate and/or the wiring diagram and it must fall within the following limits:
- variation of the power supply frequency ±2 Hz;
- variation of the power supply voltage: ±10% of the nominal voltage;
- 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 transport,
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 in-
stalled, and with the instructions in the wiring diagram provided with the unit.
When all the connections have been performed, the unit may be commissioned after the following points have been checked.
General unit conditions
START
Have the technical clearance distances indicated in the
manual been respected?
ᐁ YES
Is the unit damaged due to transport/installation?
ᐁ NO
The general conditions of the unit are compliant!
IOM_EQRU-SS_EQRHU-SS_2160a4350_208676_230601_ES-EN-FR-DE-IT
94
Restore the indicated technical spaces
ᐅ
ᐅ
NO
ᐅ
ᐅ
YES
Danger! Do not start the unit! Restore the unit!
EQRU-EQRUSS
EQRHU-EQRHUSS
Standard settings
7°C
3°C
2°C
60"/10"
15"/3"
30"
60"
360"
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