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Idiomas disponibles
Idiomas disponibles
Special maintenance
These are all those repairs or replacements which allow the unit to keep on working in standard conditions. The spare parts must be identical to the previ-
ous ones. Namely, they must have equivalent performance, dimensions etc. according to the specifications provided by the manufacturer.
IMPORTANT!
Maintenance is reserved exclusively for skilled personnel from workshops authorised by HITECSA, qualified to operate on this type
of products. Pay close attention to the danger signs on the unit. Use the personal protective equipment foreseen by current laws.
Pay the utmost attention to the symbols located on the unit. Use EXCLUSIVELY original HITECSA. spare parts.
Special precautions for R32 circuits
Remove any flammable materials or sources of ignition near the unit. Arrange suitable fire extinguishing media (powder extinguisher). Ensure plenty of
ventilation in the work area (also using fans). Arrange gas detectors suitable for R32 refrigerant that can report any gas leaks. Make sure the relative signs
are displayed, such as "No smoking", "No entry", etc.
R32 gas removal procedure
o Discharge the refrigerant;
o flush the circuit with nitrogen;
o evacuate the circuit;
o flush again with nitrogen;
o open the circuit.
IMPORTANT!
Carefully follow the requirements of 378-4.
Instructions on how to drain the cooling circuit
In order to drain the cooling circuit completely by means of type-approved devices, drain the refrigerant fluid from both the high and low-pressure sides
and in the liquid line. Use the load connections in every section of the circuit. In order to drain the refrigerant fluid completely all the circuit lines must be
drained. The fluid must not be discharged into the atmosphere as it causes pollution. It should be recovered in suitable cylinders and delivered to a com-
pany authorised for the collection.
Control
Electrical system
Check the power consumption of the unit
Check electrical control board contactors
Fans
Electric motor of fans
Checking gas charge and humidity in circuit (with
unit running at full capacity)
Check that there are no gas leaks
Verify operation of maximum pressure switches
Bleeding air from the chilled water system
Draining the water system (if necessary)
IOM_EQRU-SS_EQRHU-SS_2160a4350_208676_230601_ES-EN-FR-DE-IT
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Frequency
Every 6 months
Every 6 months
In the case of installation with harsh operating
conditions, increase the frequency of the control.
Every 6 months
Every 6 months
In the case of installation with harsh operating
conditions, increase the frequency of the control.
Every 6 months
In the case of installation with harsh operating
conditions, increase the frequency of the control.
Every 6 months
Every 6 months
Every 6 months
Every 6 months
EQRU-EQRUSS
EQRHU-EQRHUSS
Notes
Besides checking the various electrical devices,
the electrical insulation of all the cables and their
correct tightening on the terminal boards must be
verified, paying special attention to the earth con-
nections.
This operation must be carried out by skilled per-
sonnel of authorised HITECSA. workshops,
qualified to operate on this type of products.
Make sure the motors and fan blades are clean
and that there are no abnormal vibrations.
The motor must be kept clean with no traces of
dust, filth, oil or other impurities. These could
cause it to overheat due to low heat dissipation.
The bearings are usually watertight with perma-
nent lubrication and sized in order to last approxi-
mately 20.000 hours in standard operational and
environmental conditions.
This operation must be carried out by skilled per-
sonnel of authorised HITECSA. workshops,
qualified to operate on this type of products.
If the unit is idle during winter months, it must be
emptied. In alternative, a glycol mixture can be
used according to the information provided in this
manual.
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