Product Description; Safety Devices - Riello KV/200 20 ISC Solar Installation And Maintenance Manual

PRODUCT DESCRIPTION

RESIDENCE COLONNA CONDENS boilers are high
efficiency, low temperature boilers for the production of
hot water for central heating and domestic hot water sys-
tems. They incorporate a 200 litre double coil solar stor-
age cylinder and are equipped as standard with a water
return group for use in conjunction with solar panels.
RESIDENCE COLONNA CONDENS boilers incorporate
a low water content, low pressure drop, compact, mono-
bloc, aluminium heat exchanger, and a premixed micro-
flame burner controlled by an electronic control panel,
all enclosed within a robust free-standing casing. They
feature sealed combustion chambers and, depending on
what flue accessories are fitted, can be classed as B23P,
B53P, C13, C23, C33, C43, C53, C63 or C83 appliances.
The fan extracts flue gases and aspirates comburent
air from outdoors, and is continuously controlled by the
electronic control card.
The characteristics of the heat exchanger and burner
ensure an excellent level of performance.
The combustion chamber and the heat exchange area are
designed to keep temperature low over the burner sur-
face, thus minimising emissions, maximising combustion
efficiency and improving ignition reliability. RESIDENCE
COLONNA CONDENS boilers come complete with safe-
ty valves, vent and bleed valve, expansion vessels, drain
cocks, system fill cock and pumps for the central heating
circuit, storage cylinder and solar collector circuit.
More than one high or low temperature zone can be
heated, with the addition of the relevant multi-zone acces-
sories. See the r catalogue for details.

SAFETY DEVICES

RESIDENCE COLONNA CONDENS boilers are equipped with the following main safety devices:
- autodiagnostics with display of error codes
- microprocessor control and display of NTC sensor
continuity
- 3-way valve anti-block function, activated automatically
after 24 hours from last movement
- pump anti-block function, activated automatically for 30
seconds, 24 hours after last pump cycle
- ionisation flame control device for shutting off gas sup-
ply in case of flame failure
- pressure transducer to prevent ignition in case of low
water pressure (with error display)
- maximum temperature thermostat to detect overheating
and ensure the safety of the entire system (with error
display requiring reset by OFF-RESET button)
- flue gas temperature sensor to shut down the burner if
flue gas temperature exceeds the safety threshold
- condensate drain siphon with float system to prevent
the escape of fumes
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GENERAL
The main technical characteristics of SUNDAY 200 SOL
boilers are:
- electronic burner ignition and ionisation flame control
- continuous electronic flame modulation for domestic
hot water and central heating water
- microprocessor control card for input and output control
and alarm management
- pneumatic control of air-gas ratio
- 3-way valve with electric actuator
- thermostatic valve
- water pressure switch
- digital display for temperature and error codes
- buttons for OFF-reset, alarm reset, and comfort func-
tions
- domestic hot water and central heating water tempera-
ture controls
- system filling cock
- central heating circuit pressure gauge
- 8 litre domestic hot water circuit expansion vessel
- 12 litre central heating circuit expansion vessel
- 18 litre solar circuit expansion vessel
- DC fan controlled by Hall effect speed sensor
- high head pump fitted as standard
- automatic bypass for central heating circuit
- 2 NTC sensors for control of flow and return tempera-
tures
- central heating flow temperature range adjustable
between 20 and 80°C
- 200 litre double coil solar storage cylinder
- water return group complete with flow regulator, solar
circuit fill/drain cocks and non-return valve
- solar controller for control of solar circuit and domestic
hot water production.
- condensate level sensor to shut down the burner if the
condensate level in the heat exchanger exceeds the
safety threshold
- flue gas venting safety system incorporated in the
pneumatic functioning system of the gas valve
- overtemperature diagnosis with double sensor on cen-
tral heating flow and return (temperature threshold 85°C)
- fan control with Hall effect speed sensor: fan speed is
continuously monitored
- first level of frost protection (for indoor systems) func-
tional even with the boiler in standby, activated when
water temperature drops below 7°C
- 3 bar central heating circuit safety valve.
- 8 bar domestic hot water circuit safety valve
- 6 bar solar circuit safety valve
- diagnosis of primary heat exchanger with cleaning
needed display
- circulation diagnosis by comparison of readings of cen-