69
EN
7 COMMISSIONING
7.1
Preliminary operations
a
WARNING
– Should it be necessary to access the areas in the
bottom part of the appliance, make sure that the
system components and pipes are not hot (risk of
burning).
– Before replenishing the heating system, put on
protective gloves.
Before commissioning the appliance, check that:
– the type of gas is correct for the appliance
– the gas isolation valves for the heating system and the water
system are open
– the system pressure as shown on the pressure gauge when
the system is cold , is between
1 and 1.2 bar
– the pump impeller rotates freely
– the siphon has been filled
– the flue is fitted correctly.
7.2
Before commissioning
After having carried out the preliminary operations, perform
the following to start the boiler:
– set the main system switch to "ON"
ON
Fig. 39
– the type of gas for which the boiler has been calibrated,
"nG"
(methane) or
"LG"
(LPG,) will appear followed by the power.
After this the correct representation of the symbols will be
checked and finally
"- -"
will appear on the display
– press the button
s
once for at least 1 second to select
"SUMMER mode"
l
. The value of the delivery sensor
detected at that moment will appear on the display
7.2.1
Self-calibrating procedure
Carry out the "Automatic self-calibrating procedure" as
follows:
– turn the domestic hot water knob as far as it will go
r
– press and hold down the buttons
o
and
>
at the same time
for approximately 12 seconds until the flashing symbols
l
and
n
appear on the display
– as soon as the symbols begin to flash, release the buttons
o
and
>
and press the button
s
,
within 3 seconds
– the "Automatic self-calibrating procedure" starts
–
open one or more than one hot water tap
– the values flash on the display:
"99"
(maximum value),
followed by an "intermediate value" and finally
"00"
(minimum value)
The operator must wait for approximately 15 minutes for the
"self-calibrating procedure" to end and the message "SUMMER
mode"
l
to reappear on the display Once the procedure has
terminated:
– close the taps opened previously and check that the
appliance shuts down.
If there is a fault, the message
"AL"
will appear on the display
followed by the fault code (eg.
"06"
- no flame detected).
m
CAUTION
To restore the start conditions press and hold
the button
o
R
for more than 3 seconds. This
operation can be performed up to a maximum of 6
times without the "self-calibrating procedure" being
interrupted.
– press the button
s
once to select "WINTER mode"
n
. The
value of the heating water temperature detected at that
moment will appear on the display
– adjust the air thermostat and check that the boiler starts
and operates correctly
– carry out the procedure "Chimney sweeper function",
to check the mains gas pressure, detect the combustion
parameters and to measure the combustion efficiency
required by legislation in force.
Summary of Contents for VERA HE 25
Page 4: ...4 IT...
Page 10: ...10 IT...
Page 20: ...20 IT...
Page 42: ...42 EN...
Page 48: ...48 EN...
Page 58: ...58 EN...
Page 81: ...81...
Page 82: ...82...
Page 83: ...83...
