Checks Before Start-Up; Routine Maintenance; Quarterly Checks; Annual Checks - Cordivari Bolly1 PDC Manual Del Usuario

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5. Start-up

5.1 Checks before start-up

Before starting the unit check:
• That the primary and secondary tanks have been filled
• The electrical connections and the earthing cable connection have
been correctly inserted;
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CAUTION:
Check that the hydraulic connections have been connect-
ed correctly and make sure that the check valve on the do-
mestic water supply system has been connected in order to avoid
the water supply system from not operating in case of no water.
Check that the tank is full and that there is pressure on the intake
water before connecting the power supply.
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Start-up without water, even for just a few seconds, can cause
circulator breakage (C). If the above-mentioned precautions are not
taken, the manufacturer is relieved of any liability and any warranty
will be void
5.2 Start-up
Connect the power supply.
Start-up of the unit is automatic: the circulator (C) activates the
heat exchange when the flow switch (F) detects flow on the primary
circuit.
6. Operation and thermoregulation
Hot water production inside the boiler occurs due to heat exchange
between the primary and secondary circuit accumulation via the heat
exchangers on the product.
Immersed heat exchangers (if any) exchange in a static and uncontrolled
way with the water contained in the tank; the heat exchange module,
however, exchanges in a dynamic (counter-current) and controlled way
via the external plate exchanger (S).
Once the power supply is connected, the unit operates automatically:
when the flow switch (F) detects flow on the primary circuit the circulator
(C) activates the heat exchange and the thermostatic mixing valve (M)
automatically fills the tank with hot water from above at the desired
temperature (achieving thermal stratification).
To adjust the temperature of the DHW, turn the thermostatic valve
head (M) and set the value corresponding to the desired temperature;
this value depends on the temperature and flow rate in the primary
circuit, it is therefore necessary to run some tests and check the DHW
temperature.
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CAUTION:
the set temperature must be lower than that of the primary
circuit intake, otherwise the heat exchange module will not
allow the water to be filled in the tank, i.e. the product will not operate.
Furthermore, it is advised to initially set medium-low values on the
gauge of the thermostatic valve head and then, once the DHW tem-
perature is checked, increase the value, making sure to keep it at least
5°C below the minimum temperature of the primary circuit intake.
If the generator is a heat pump, to adjust it keep in mind that the
intake temperature of the primary circuit can vary noticeably de-
pending on environmental operating conditions (source tempera-
ture, humidity etc.).
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If the power control generator permits, thanks to the thermal stratification
in the product and the two connections for the temperature sensor (high
and low), there are two phases for filling with hot water, the first (partial)
up to the high probe and the second (total) in the entire tank.
This allows a partial DHW quantity to the taps, therefore the generator
can be used to heat the room and also stop heating of the whole tank.

7. Routine maintenance

7.1 Warnings
CAUTION: BEFORE STARTING ANY MAINTENANCE OP-
ERATION MAKE SURE THAT THE MACHINE IS NOT OR
CANNOT ACCIDENTALLY BE POWERED ELECTRICALLY.
IT IS THEREFORE NECESSARY TO DISCONNECT POWER SUPPLY
AT EACH MAINTENANCE.
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• It is the customer's duty to carry out all maintenance on
the machine.
• Only trained and qualified personnel can carry out all
maintenance operations.
• Do not try to repair malfunctions or move the machine
without the help of the person in charge of the unit.
• If the unit needs to be disassembled, protect your
hands with protective work gloves.
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Upon start-up make sure that the bleed valve (J) is opened properly.
Upon start-up and after some days of operation, check bolt tightening on
the exchanger flange, easily accessible thanks to the removable flange
covering.
After a few hours of operation check the DHW temperature obtained and
set the value on the thermostatic valve head to change it, making sure to
stay 5°C below minimum intake temperature of the primary circuit.

7.2 Quarterly checks

• Check general conditions of the unit.
• Check DHW temperature and primary circuit during operation, and if
needed change the value set on the thermostatic valve head.
• Check use consumption of the magnesium anode with the Anoden
Tester device (optional) to plan replacement. The progressive
consumption of magnesium anode can vary based on operating
conditions and on the nature of the water. At the beginning of use,
plan frequent magnesium anode checks to verify consumption and to
organise for periodic replacements at least once per year.
• Check the operation of the system safety valve.
• Check the preloading of the system expansion tank.

7.3 Annual checks

• General check of heating element functioning, if present
• Check the tightening of the bolts, nuts, flanges and hydraulic
connections that vibrations could have loosened.
8. Operation
The maximum operating temperatures reported in this document and on
the equipment data plate are to be understood as maximum resistance
temperatures in the internal covering of the hot water storage tanks. The
maximum temperature of use must respect national norms regarding
energy consumption.

8.1 Fault location

For product anomalies, before calling for technical assistance check if
the fault can be fixed first by referring to the following table.
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Cod. 1910000001149 - nv02