AERMEC ANK Manual de instalação - Página 8
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perature of the outlet water must rise above +4°C/39°F. Rearm is man‐
ual.
WHENEVER THIS ALARM INTERVENES, WE ADVISE YOU CALL THE NEAR‐
EST AFTER‐SALES SERVICE IMMEDIATELY.
5.7. WATER FLOW RATE ALARM
The MODUCONTROL manages a water flow rate alarm controlled by the
differential pressure switch installed in series on the machine. This type
of safety device intervenes after the first 40 seconds of pump function‐
ing, if the water flow rate is not sufficient. The intervention of this alarm
determines compressor and pump block.
6. MAINTENANCE
Inspection, maintenance and eventual repair work
must be carried out only by a legally qualified techni‐
cian.
Lack of control/maintenance can cause damage to
persons or things.
All cleaning is prohibited until the unit has been disconnected from the
electric power supply mains. Make sure there is no voltage present be‐
fore operating. Periodic maintenance is fundamental to keep the unit
perfectly efficient under a functional and energetic point of view. It is
therefore essential to carry out periodic yearly controls for the:
6.1. HYDRAULIC CIRCUIT
− Refilling of water circuit
− Cleaning the water filter
− Control of flow switch
− Bleed the air from the circuit.
− Verify that the water flow rate to the evaporator is constant.
− Verify the thermal insula on of the hydraulic piping.
− Check the percentage of glycol where necessary.
6.2. ELECTRIC CIRCUIT CHECKS
− Safety efficiency
− Electric supply voltage
− Electrical Input
− Connec on ghtness
− Verify the opera on of the crankcase compressor heater
6.3. COOLING CIRCUIT CHECKS
− State of compressor
− Efficiency of the plate heat exchanger resistance if envisioned
− Work pressure
− Leak test for water ghtness control of the cooling circuit
− Func oning of high and low pressure switches
8
− Carry out the appropriate checks on the filter dryer to check effi‐
ciency
6.4. MECHANICAL CHECKS
− Check the ghtening of the screws the compressors and the elec‐
trical box, as well as the exterior panelling of the unit. Insufficient
fastening can lead to undesired noise and undesired vibrations
− Check the condi on of the structure. If there are any oxidised
parts, treat with paint suitable to eliminate or reduce oxidation.
6.6. REFRIGERANT CHARGING PROCEDURE
IT IS forbidden to CHARGE the circuit with a
refrigerant gas different to the one indicated.
Using a different refrigerant gas can cause
serious damage to the compressor.
The charging procedure is the following:
− Empty and dry the en re cooling circuit using a vacuum pump
connected to the low and high pressure socket until 10Pa/77 mi‐
crons is read on the vacuum meter. Wait a few minutes and check
that this value does not rise above 50 Pa/362 microns.
− Connect the refrigerant gas cylinder or a load cylinder to the ac‐
cess port on the low pressure line.
− Charge the amount of refrigerant gas indicated on the appliance
features plate.
− A er a few hours of opera on, check that the liquid indicator
indicates the dry circuit (dry‐green). In the case of partial loss, the
circuit must be emptied completely before being re‐charged.
− The R410A refrigerant must only be charged in the liquid state.
− Func oning condi ons that are different to the nominal condi‐
tions can give rise to values that are greatly different.
− Leak tes ng must only be performed using R410A refrigerant gas,
nitrogen and using a suitable leak detector.
− In the refrigerant circuit it is prohibited to use oxygen or acetylene
or other inflammable or poisonous gases because they are a cause
of explosions or intoxication.