Ignition Lockout, AIR Flow Device RSF only

(See Fig. 3)

The appliance can be reset by pressing the reset button and holding in for 5 seconds.

IGNITION LOCKOUT

The appliance will enter a lockout condition in the event of the burner failing to ignite.

If the burner fails to light within a preset time of 10 seconds the electricity supply to the gas valve will be interrupted.

If ignition lockout has occurred, the central heating demand indicator will flash slowly (approximately once per second).

The appliance can be reset by pressing the reset button and holding in for 5 seconds. Check that the gas supply has not been interrupted.

If this condition continues to occur, then call a service engineer.

AIR FLOW DEVICE (RSF ONLY)

The appliance will enter a lockout condition in the event of an air flow fault.

If the controls fail to detect the correct air flow through the appliance the electricity supply to the gas valve will be interrupted.

If an air flow fault has occurred, the domestic water demand indicator will flash (approximately five times per second).

The appliance will try to re-light after a waiting period of approximately 4 minutes Check that the flue terminal has not been obstructed or damaged. If this condition continues to occur, then call a service engineer.

FLUE SPILLAGE DEVICE (OF ONLY)

The appliance is fitted with a device which detects the spillage of combustion products from the draught diverter. In the event of the flue becoming wholly or partly blocked this device will cut the gas supply to the burner. If the device has activated, the D.H.W. demand indicator will flash (approximately 5 times per second).

The device automatically resets after a waiting period of approxi- mately 20 minutes. If the blockage remains the appliance will re-light briefly before the device operates again. Should the problem persist consult your service engineer.

REMOVAL AND REPLACEMENT

OF THE FRONT PANEL

Removal:

Holding the panel at the edges, slide it upwards to disengage the clips and ease the top edge forwards and upwards to raise it clear of the two pegs on the top edge of the facia.

Replacement:

Locate the two holes in the bottom edge of the front panel over the two pegs on the top edge of the facia and reverse the removal procedure.

WARNING: Do not touch any component within the appliance when it is running as some may be very hot.

28CDI, 35CDI II, 24CDI 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.