Riello START 28 KI Manuel D'installation Et D'utilisation page 11

The frequency of controls depends on the conditions of installation and
usage, it being anyhow necessary to have a complete check carried
out by authorized personnel from the Servicing Centre every year.
• Check and compare the boiler's performance with the relative
specifications. Any cause of visible deterioration must be immediately
identified and eliminated.
• Closely inspect the boiler for signs of damages or deterioration,
particularly with the drainage and aspiration system and electrical
apparatus.
• Check and adjust – where necessary – all the burner's parameters.
• Check and adjust – where necessary – the system's pressure.
• Analyze combustion. Compare results with the product's
specification. Any loss in performance must be identified and
corrected by finding and eliminating the cause.
• Make sure the main heat exchanger is clean and free of any residuals
or obstruction; if necessary clean it.
• Check and clean – where necessary – the condensation tray to
make sure it works properly.
Always switch off the power to the appliance and close the gas by
the gas cock on the boiler before carrying out any maintenance
and cleaning jobs on the boiler.
After performing the necessary maintenance operations, the
original adjustments must be restored and the combustion
product analysis must be performed to check the correct
operation.
Do not clean the appliance or any latter part with flammable
substances (e.g. petrol, alcohol, etc.).
Do not clean panelling, enamelled and plastic parts with paint
solvents.
Panels must be cleaned with ordinary soap and water only.
4.8 Adjustments
START boilers are supplied for operation with natural gas and are
factory-set as specified on the technical data plate.
However, if it is necessary to repeat the adjustments, for example
after non-scheduled maintenance, replacing the gas valve or after
conversion from natural gas to LPG, or vice versa, proceed as
described below.
The minimum and maximum output and the maximum heating settings
must be set in the specified sequence and exclusively by qualified
technicians.
- Turn the main system switch to "OFF".
- Remove the case unscrewing the fixing screw.
- Unscrew the panel screw and turn the control panel forwards.
- Unscrew the tapping point screw downstream of the gas valve by
approximately two turns and connect a pressure gauge.
- Disconnect the compensation tube from the air chamber (only KIS
model).
Pressure
tapping point
downstream of
gas valve
Faston
connectors
Compensation
tube
Protection
cap
Maximum output
adjustment nut
Minimum DHW
adjustment Allen screw
Maximum and minimum DHW output setting
- Open the hot water tap to the maximum flow rate.
- On the control panel, set the function selector to
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
Maximum pressure NATURAL
downstream of valve GAS
(tolerance ±10%) (G20)
START 28 KI
12,70
START 24 KIS
11,80
START 28 KIS 11,30
START 35 KIS 9,60
- 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
Minimum pressure NATURAL
downstream of valve GAS
(tolerance ±10%) (G20)
START 28 KI
1,00
START 24 KIS 1,50
START 28 KIS 1,60
START 35 KIS 1,10
- Reconnect a faston clamp on the modulator.
- Close the domestic hot water tap.
Electrical setting of minimum and maximum heating
The "electrical setting" function is activated and deactivated
exclusively by 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.
Activating the function involves starting up the burner by
simulating a heating request.
To calibrate:
- turn the boiler off
- remove the casing, press the side buttons on the control panel and
then rotate it forward
ENGLISH
"Summer mode"
LIQUID GAS
BUTANE PROPANE
(G30) (G31)
27,00 35,20 mbar
27,80 35,80 mbar
28,00 36,00 mbar
- 35,00 mbar
LIQUID GAS
BUTANE PROPANE
(G30) (G31)
2,30 2,90 mbar
3,30 4,30 mbar
3,60 4,80 mbar
- 4,40 mbar
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