Hot Water Mode | Bosch Appliances 28CDI, 35CDI II guide

Hot Water Mode:

The appliance operates to supply only domestic hot water when the heating temperature mode is fully anti-clockwise, at the – posi- tion or the timer is programmed to OFF mode.

A flow restrictor is fitted within the appliance which limits a hot water delivery rate to a maximum of:

24CDi	9.0 (±15%) litres/minute
28CDi	10.0 (±15%) litres/minute

35CDi II 12.0 (±15%) litres/minute

Hot Water and Central Heating mode:

Fig. 1. System Diagram.

	Automatic air
	vent
		Gas to water
		heat exchang-
		er
		Boiler
	Circulating	Expansion
	pump	Expansion
		vessel
	Water to	Pressure
	water heat	Pressure
	water heat	relief valve
	exchanger	relief valve
	exchanger
	Diverter valve

CH	Domestic	Domestic CH	Safety dis-
flow	hot water	cold sup- return	charge
	out	ply

When a demand is made for heating by the system con- trols (i.e. a programmer or room thermostat), the pump will energise, circulating pri- mary water around the heat- ing system and the burner will light. The heat output from the appliance in this mode has been factory set to maximum. The appliance will operate as necessary to main- tain the temperature of the radiators at the level set by the adjustment of the Heating Temperature Control Knob. (See Fig. 2.)

If the system no longer requires output to maintain the desired room tempera- ture, the burner will extin- guish. The pump will contin- ue to run for a short period to dissipate the residual heat from the appliance and then switch off.

The appliance will sup- ply heat to the central heating system as required. A demand for hot water at a tap or show- er will override the central heating function for the peri- od of the domestic hot water demand.

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.