Ariston 801 Instructions For Installation, Use, Maintenance page 43

MAINTENANCE REGULATIONS (for authorised personnel)
WARNING!
Carefully follow the general warnings and safety rules listed in the
preceding sections, in strict adherence to the provisions contained
therein.
WARNING!
MAINTENANCE OPERATIONS OR REPAIRS MAY ONLY BE CAR-
RIED OUT BY QUALIFIED PERSONNEL WITH ADEQUATE EQUIP-
MENT.
WARNING!
To avoid the risk of fire and/or explosion, do not use means to ac-
celerate the defrosting process or to clean, other than those
recommended by the manufacturer.
WARNING!
THE WATER HEATER IS SUPPLIED WITH 0.15 KG OF R290 REFRIG-
ERANT. DO NOT EXCEED THE ALLOWED CHARGE QUANTITY.
THE R290 REFRIGERANT (PROPANE) IS A FLAMMABLE AND
ODOURLESS REFRIGERANT.
THE REFRIGERANT CHARGING OPERATIONS MAY ONLY BE CAR-
RIED OUT BY QUALIFIED PERSONNEL WITH ADEQUATE EQUIP-
MENT AND THE APPROPRIATE PERSONNEL CERTIFICATION
CERTIFYING THEIR KNOWLEDGE OF AND ABILITY TO MANAGE
PLANTS CONTAINING HC-TYPE GASES SUCH AS R290 (PRO-
PANE). Annex HH IEC 60335-2-40.
WARNING!
It is forbidden to perform repair work on the cooling circuit and
on the components belonging entirely to it at the installation site.
These interventions may be carried out only at a workshop that is
suitably equipped for servicing units with flammable refrigerants
and by qualified personnel. Annex HH IEC 60335-2-40.
In the event of routine or extraordinary maintenance, it is necessary
to perform the safety checks to ensure that the risk of ignition in a po-
tentially explosive atmosphere is reduced to a minimum while work
is being carried out.
All maintenance staff and others working in the local area shall be
instructed on the nature of work being carried out. Work in confined
spaces shall be avoided.
Any intervention should be performed by avoiding the use of ignition
sources that may cause fire or explosion risks.
No person carrying out work in relation to a refrigerating system
which involves exposing any pipe work shall use any sources of igni-
tion in such a manner that it may lead to the risk of fire or explosion.
All possible ignition sources, including cigarette smoking, should be
kept sufficiently far away from the site of installation, repairing, re-
moving and disposal, during which refrigerant can possibly be re-
leased to the surrounding space.
Prior to work taking place, the area around the equipment is to be
surveyed to make sure that there are no flammable hazards or igni-
tion risks. "No Smoking" signs shall be displayed.
Ensure that the area is in the open or that it is adequately ventilated
before breaking into the system or conducting any hot work.
A degree of ventilation shall continue during the period that the work
is carried out. The ventilation should safely disperse any released
refrigerant and preferably expel it externally into the atmosphere.
The area shall be checked with an appropriate refrigerant detector
prior to and during work, to ensure the technician is aware of poten-
tially toxic or flammable atmospheres.
Ensure that the leak detection equipment being used is suitable for
use with all applicable refrigerants.
43 /
If any hot work is to be conducted on the refrigerating equipment or
any associated parts,appropriate fire extinguishing equipment shall
be available to hand. Have a dry powder or CO2 fire extinguisher
adjacent to the charging area.
CHARGING PROCEDURE (Annex DD.10 IEC 60335-2-40)
The product must be charged exclusively through the charging sock-
et specified in the figure.
The operation may be carried out only by qualified personnel who
have completed training in accordance with the specifications of
Annex HH to the IEC 60335-2-40 standard shown in "Information
and personal training" parargph.
The following requirements must be fulfilled during the charging pro-
cedure:
- Ensure that contamination of different refrigerants does not oc-
cur when using charging equipment. Hoses or lines shall be as
short as possible to minimise the amount of refrigerant contained
in them.
- Cylinders shall be kept in an appropriate position according to the
instructions.
- Ensure that the refrigerating system is earthed prior to charging
the system with refrigerant.
- Label the system when charging is complete (if not already).
- Extreme care shall be taken not to overfill the refrigerating system.
Prior to recharging the system, it shall be pressure-tested with the
appropriate purging gas.
The system shall be leak-tested on completion of charging but prior
to commissioning. A follow up leak test shall be carried out prior to
leaving the site.
Expertise of service personnel - ANNEX HH IEC 60335-2-40.
Information on the additional procedures with respect to those nor-
mally used for installation, repair, maintenance and decommissioning
of a cooling appliance are necessary whenever an appliance with
flammable refrigerants is involved.
Training on these procedures is entrusted to national training organ-
isations or to manufacturers accredited for training on the applicable
national standards defined by the law. The level of expertise reached
must be documented by a certificate.
CHECKS ON AND MAINTENANCE OF ELECTRICAL DEVICES
Repair and maintenance to electrical components shall include initial
safety checks and component inspection procedures.
Initial safety checks shall include:
• that capacitors are discharged: this shall be done in a safe manner
to avoid possibility ofsparking;
• that no live electrical components and wiring are exposed while
charging, recovering or purging the system;
• that there is continuity of earth bonding.
• Check that cabling will not be subject to wear, corrosion, excessive
pressure, vibration, sharp edges or any other adverse environ-
mental effects. The check shall also take into account the effects
of aging or continual vibration from sources such as compressors
or fans.
If a fault exists that could compromise safety, then no electrical sup-
ply shall be connected to the circuit until it is satisfactorily dealt with.
43 / EN