Commissioning And Maintenance; First Start-Up - Riello START 28 KI Manuel D'installation Et D'utilisation

It is appropriate to install a condensate collector and specific
pipes. In this case realize an inclination of 3° to the condensate
collector.
24 KIS
Max length
twin duct Ø 80 mm
up to 2m + 2m
from 2m + 2m to 6 + 6m
from 6m + 6m to 16m + 16m
28 KIS
Max length
twin duct Ø 80 mm
up to 3m + 3m
from 3m + 3 tom 7m + 7m
from 7m + 7m to 11m + 11m
from 11m + 11m to
14,5m + 14,5m
35 KIS
Max length
twin duct Ø 80 mm
up to 4m + 4m
from 4m + 4m to 8m + 8m
(*) fitted in the boiler
POSSIBLE OUTLET CONFIGURATIONS (fig. 10a)
B22P-B52P Suction indoors and discharge outdoors.
C12-C12x Discharge via concentric wall outlet. The pipes may
leave the boiler independently, but the outlets must be concentric
or sufficiently close together to be subjected to similar wind condi-
tions (within 50 cm).
C22 (where required) Discharge via concentric outlet in common
smoke pipe (suction and discharge in the same pipe).
C32-C32x Discharge via concentric roof outlet. Outlets as for C12.
C42-C42x Discharge and suction in common separate smoke
pipes, but subjected to similar wind conditions.
C52-C52x Separate discharge and suction lines on wall or roof
and in areas with different pressures. The discharge and suction
lines must never be positioned on opposite walls.
C82-C82x Discharge via single or common smoke pipe and wall
suction line.
C92-C92x Discharge on roof (similar to C32) and air suction from
a single existing smoke pipe.
3.11 System filling and emptying (fig. 11)
Once the hydraulic connections have been made, the system can
be filled.
FILLING
- Open the automatic air vent valve cap by two or three turns (A)
- Ensure that the cold water inlet valve is open
- Open the filling tap (B) until the pressure on the hydrometer is
between 1 and 1.5 bar
- Close the filling tap.
NOTE: air in the boiler is bled automatically via the automatic air vent
valve on the pump. Ensure that the valve of the air vent valve is open.
EMPTYING
- Before emptying, disconnect the electric power supply by switching
the main system switch to "OFF".
- Close the cold water inlet valve.
a) Heating system:
- Close all shut-off devices of the heating circuit
- Connect the pipe supplied as standard to the discharge valve (C)
- Loosen the discharge valve (C)
b) DHW system:
- Open the hot and cold water utility valves and empty from the
lowest points.
The safety valve outlet (D) must be connected to a suitable
disposal system. The manufacturer declines all liability for any
flooding caused by the safety valve.
Load losses
Flue gas
flange (ø)
45° bend
42
44 (*) 1,2m
not installed
Load losses
Flue gas
flange (ø)
45° bend
43
45 (*)
1,2m
47
not installed
Load losses
Flue gas
flange (ø)
45° bend
49 (*)
1,2m
not installed

4 - COMMISSIONING AND MAINTENANCE

4.1 Preparation for initial commissioning
Before the ignition and functional testing of the boiler, it is essential
to check that:
- the system gas and water valves are open
90° bend
1,7m
90° bend
- the type of gas and the supply pressure comply with the boiler
specifications
- the vent valve cap is open
1,7m
- the hydraulic circuit pressure, when cold, is between 1 and 1.5 bar
and the circuit is de-aerated
- preloading of the expansion tank is adequate (refer to the data table)
- the electrical connections have been made correctly
- the flue gas discharge ducts and the combustion air suction vents
have been fitted correctly
90° bend
- the pump can rotate freely: unscrew the inspection screw and use
a slotted screwdriver to check that the rotor shaft moves freely.
1,7m
Before loosening or removing the pump cap, protect the electric
devices underneath from any leaks.
4.2

First start-up

To turn on the boiler:
- Connect the boiler to the mains
- Open the gas valve, to enable the gas supply
- Adjust the room thermostat to the desired temperature (~20°C)
Turn the function selector to the required setting:
WINTER: turn the function selector to within the adjustment range.
The boiler produces domestic hot water and heating water. The boiler
lights automatically in response to a heat request. The digital display
indicates the heating water temperature. The boiler lights automatically
in response to a request for domestic hot water. The display indicates
the domestic hot water temperature
WINTER MODE
ENGLISH
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