Riello START AQUA 24 BI Manuel De L'installateur Et De L'utilisateur page 9

- Remove the case after unscrewing the screws.
- Press the side buttons of the panel and then turn it forwards.
- Unscrew the tapping point screw downstream of the gas valve by
approximately two turns and connect a pressure gauge.
Maximum and minimum DHW output setting
- Open a hot water tap to the maximum flow rate.
- On the control panel, set the function selector to
mode and set the DHW temperature selector to the maximum.
- Turn the boiler on by setting the main switch to "ON".
- Check that the pressure reading on the gauge is stable. If the
reading is not stable, use a milli-ammeter (in series with a
modulator wire) to check that the maximum available current is
delivered to the modulator (120 mA for G20, and 165 mA for
LPG).
- Remove the protection cap from the adjustment screws carefully
using a screwdriver.
- Using a fork wrench CH10, turn the adjustment nut for maximum
output to obtain the value specified in Table 1.
TABLE 1
NATURAL
Maximum DHW pressure
downstream of valve
(tolerance ± 10%)
- Disconnect a faston clamp from the modulator.
- Wait for the pressure on the gauge to stabilise at the minimum
value.
- Use a hex wrench – taking care not to press the internal shaft – to
adjust the red screw for the DHW minimum setting and calibrate
until the gauge shows the value specified in Table 2.
TABLE 2
NATURAL
Minimum DHW pressure
downstream of valve
(tolerance ± 10%)
- Reconnect a faston clamp on the modulator.
- Close the domestic hot water cock.
Pressure
tapping point
downstream
of gas valve
Faston
connectors
LIQUID GAS
GAS
BUTANE PROPANE
(G20)
(G30) (G31)
9,90 27,60 35,50
LIQUID GAS
GAS
BUTANE PROPANE
(G20)
(G30) (G31)
1,60 4,80 6,00
Protection
cap
Maximum output
adjustment nut
Minimum DHW
adjustment Allen screw
Electrical setting of minimum and maximum heating
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The "electrical setting" function is activated and deactivated
exclusively via the jumper (JP1).
The function can be enabled by:
- Powering up the board with jumper JP1 wired in, and the function
selector set to Winter, regardless of whether other operating
requests are active or not.
- Wiring in jumper JP1, with the function selector set to Winter,
without any heating requests in progress.
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Activating the function involves starting up the burner by
simulating a heating request.
To calibrate:
- turn the boiler off
- remove the case, press the side buttons of the panel and then
turn it forwards
- remove the screws on the cover protecting electrical parts (B, fig.
(Summer)
10) and access the board
- wire in jumper JP1 to enable the dials on the control panel for
setting the minimum and maximum heating values
- ensure that the function selector is set to Winter
- connect the boiler to the mains
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Electrical board powered (230 V)
Minimum
heating
setting
- turn the heating water temperature dial to the minimum heating
value as specified in Table 3
mbar
TABLE 3
Minimum heating pressure
downstream of valve
(tolerance ± 10%)
- wire in jumper JP2
- turn the DHW temperature adjustment dial to the maximum
heating value as specified in Table 4
TABLE 4
mbar
Maximum pressure in
heating mode downstream
of valve (tolerance ±10%)
- remove jumper JP2 to memorise the maximum heating value
- remove jumper JP1 to memorise the minimum heating value and
to exit the calibration procedure
- disconnect the pressure gauge and refit the pressure tapping
point screw.
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To complete calibration without memorising the values set, either:
a) set the function selector to
b) disconnect the power supply
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Calibration is completed automatically, without memorising the
minimum or maximum values, 15 minutes after activation.
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The function is also terminated automatically in the event
of a shutdown or permanent block. Again, values are NOT
memorised.
NOTE: to calibrate only the maximum heating value, remove
jumper JP2 (to memorise the maximum value) and then exit the
function without memorising the minimum value by setting the
function selector to OFF or by turning the boiler off at the mains.
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After any intervention on the gas valve adjustment component,
seal with sealing paint.
NATURAL LIQUID GAS
GAS
BUTANE PROPANE
(G20)
(G30) (G31)
1,60 4,80 6,00
NATURAL LIQUID GAS
GAS
BUTANE PROPANE
(G20)
(G30) (G31)
9,90 27,60 35,50
(OFF-unblock)
ENGLISH
Maximum
heating
setting
mbar
mbar
9