Scheduled Maintenance; Unscheduled Maintenance; Disposal - Baxi PBM-i 20 Manual Del Usuario

SCHEDULED MAINTENANCE

Never perform any cleaning operations before having
disconnected the unit from the mains power supply.
Make sure power is not connected before proceeding.
Control maintenance is fundamental to maintain the efficiency
of the unit both in terms of operation and energy consumption.
The Technical Service maintenance plan must be observed,
with an annual service which includes the following opera-
tions and checks:
- Filling of the water circuit;
- Presence of air bubbles in the water circuit;
- Efficiency of safety devices;
- Power supply voltage;
- Electrical power input;
- Tightness of electrical and water connections;

UNSCHEDULED MAINTENANCE

Never perform any cleaning operations before having
disconnected the unit from the mains power supply.
Make sure power is not connected before proceeding.
CHEMICAL WASHING
It is recommended to chemically flush the plate heat
exchanger after every 3 years of operation.
For instructions on how to carry out this operation, call a
specialized technician.
REFRIGERANT GAS CHARGE
The chillers are filled with R410A refrigerant gas and tested
in the factory.
In normal conditions, there should be no need for the Tech-
nical Service to intervene to check the refrigerant gas.
however, over time, small leaks may develop at the joints
leading to loss of refrigerant and draining of the circuit,
causing the unit to function poorly.
In this case, the leaks of refrigerant must be identified and
repaired and the refrigerant circuit recharged.
Proceed as follows:
- Empty and dry the entire refrigerant circuit using a vacuum
pump connected to the low and high pressure tap until the
vacuometer reads about 10 Pa.
Wait a couple of minutes and check that this value does
not rise to more than 50 Pa.
- Connect the refrigerant gas cylinder or a filling cylinder to
the low pressure line pressure gauge connection

DISPOSAL

The unit must be disposed of according to the legislation
in force in the country concerned
- Condition of the compressor contactor;
- Efficiency of the plate heat exchanger resistor;
- Verification of operating pressure, superheating and sub-
cooling
- Efficiency of the compressor heater
- Cleaning of the finned coil every three months
- Cleaning of the fan grills
- Cleaning of condensate drain pan.
- Cleaning of water filters.
- Checking the ventilation openings on the base are free of
leaves, bushes or anything else that may obstruct air flow.
For units installed near the sea, the intervals between main-
tenance should be halved.
- Charge the quantity of refrigerant indicated on the unit's
rating plate.
- Always check the superheating and subcooling values,
which should be between 5 and 10°C and 4 and 8°C.
- After a couple of hours operation, check that the liquid
indicator indicates a dry circuit (dry-green).
In the event of partial leaks, the circuit must be com-
pletely emptied before being recharged.
The R410A refrigerant must only be charged in the liq-
uid state.
Operating conditions other than rated conditions may
produce considerably different values.
Tightness testing or identification of leaks must only be
carried out using R410A refrigerant gas, checking with a
suitable leak detector.
The refrigerant circuit must not be charged with a
refrigerant other than that indicated on the rating plate
and in this manual.
The use of a different refrigerant may cause serious
damage to the compressor.
Oxygen, acetylene or other flammable or poisonous gas-
es must never be used in the refrigerant circuit as they
may cause explosion or poisoning.
Oils other than those indicated must not be used.
The use of different oil may cause serious damage to the
compressor.
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EN PBM 20÷40 73