Clip
Circulating pump
Locating peg

TO LIGHT AND STOP THE

APPLIANCE

TO LIGHT THE APPLIANCE

Check that the water valves to the central heating circuit are open. On sealed systems check that the grey needle on the pressure

gauge is not below the required pressure.

Switch on the mains electricity. The green power on indicator will light. Set the room thermostat, if fitted, to maximum. Turn the central heating temperature control knob to ‘MAX’. The red central heating demand indicator will light.

The burner will light and the red flame detection indicator will light. Set the central heating and hot water temperature control knobs

and the room thermostat, if fitted, to the desired temperature.

TO STOP THE APPLIANCE

For Short Periods

Turn the central heating temperature control knob fully anti- clockwise to the ‘ ’ position.

For Long Periods

Turn the operating switch to the ‘ ’ position. Switch off the mains electricity.

A facia mounted electronic programmer will retain its settings for about two weeks, after which it will return to the factory set

 

 

 

 

 

programme. The display will disappear

 

 

 

 

 

Fig. 3. CDi with front panel removed.

 

 

after approximately 12 hours.

 

 

A facia mounted mechanical

 

 

 

 

 

 

 

 

 

 

programmer will require resetting once

 

 

 

 

 

the operating switch has been set to ‘O’,

 

 

 

 

 

or the mains supply has been

 

 

 

 

 

disconnected.

 

ELECTRICITY SUPPLY

 

FAILURE

 

If the electricity supply fails the

 

appliance will not operate. Once the

Expansion

supply is restored the appliance will

vessel

return to normal operation. If a

 

programmer is fitted, check that the

 

settings have been maintained.

 

OVERHEAT CUT-OFF

Gas valve

THERMOSTAT

 

The appliance will enter a lockout

 

condition in the event of overheating.

 

An overheat cut-off thermostat is

 

fitted to the appliance which will

 

interrupt the electricity supply to the gas

 

valve.

 

If the overheat cut-off has operated,

 

both the central heating and the hot

 

water demand indicators will flash

 

together.

10

Page 9 Page 11
Page 10
Image 10
Bosch Appliances 28CDI, 35CDI II manual To Light and Stop Appliance
Page 9 Page 11

28CDI, 35CDI II specifications

Bosch Appliances has established itself as a leader in the world of heating and hot water solutions, and its range of condensing boilers, specifically the 28CDI, 35CDI II, and 24CDI models, exemplifies their commitment to innovation, efficiency, and reliability.

The Bosch 28CDI condensing boiler is designed with efficiency in mind, delivering a powerful output without compromising on energy consumption. With a maximum output of 28kW, it is ideal for medium-sized homes and offers high levels of heating performance. Its compact design makes it easy to install in various locations, even in smaller homes. Notably, the 28CDI features a built-in wireless connectivity option, allowing users to monitor and control their heating system remotely via a smartphone app.

The Bosch 35CDI II takes energy efficiency to the next level, with an increased output of 35kW, providing ample heating for larger homes. This model incorporates advanced weather compensation technology, which adjusts the heating output based on outdoor temperature, thus optimizing energy use and enhancing comfort. Additionally, the 35CDI II features a high-efficiency stainless steel heat exchanger, ensuring durability while maximizing energy savings. The boiler's intuitive user interface makes it easy to operate, providing users with real-time information about their heating system.

For even smaller spaces, the Bosch 24CDI offers a compact solution with an output of 24kW. This model is particularly effective for energy-conscious homeowners. It includes an integrated condensing technology which allows for efficient heat recovery from exhaust gases, resulting in lower energy bills and reduced carbon emissions. The 24CDI is also designed for quiet operation, ensuring that it runs smoothly without disturbing the household.

All three models boast several advanced safety features, including frost protection, pressure relief, and a quick reset function. They are also compatible with Bosch's range of smart controls, enabling users to tailor their heating needs according to their schedule and preferences. With these notable characteristics, the Bosch 28CDI, 35CDI II, and 24CDI boilers provide efficient, reliable heating solutions tailored to various household requirements, ensuring comfort and peace of mind for homeowners.
Top Page Image Contents