GENERAL NOTES

CENTRAL HEATING SYSTEM

During the first few hours of operation of the central heating system, check that all radiators are being heated at an even rate. Should the upper area of a radiator be at a lower temperature than the base of the radiator, it should be vented by releasing air through the venting screw at the top of each radiator. Make sure your installer shows you how to carry out the operation. Repeated venting will reduce the quantity of water in the system and this must be replen- ished for safe and satisfactory operation of the appliance. Should water leaks be found in the system or excessive venting be required from any radiator, your installer or heating engineer should be con- tacted and the system corrected.

Fig. 1a.

SEALED HEATING SYSTEM

The appliance can be fitted to a sealed heating sys-

 

 

tem which is pre-pressurised. In this case your installer

 

will advise you on the minimum and maximum pres-

 

sure that should be indicated on the pressure gauge. See

 

Fig. 2. Check regularly that this pressure is maintained

 

and contact your installer or maintenance engineer if

 

there is a permanent significant drop in pressure indi-

 

cated on the gauge. If the system loses pressure it

 

should be re-pressurised as instructed by the installer

 

(N.B. Maximum operating pressure 2.5 bar).

 

Re-pressurising The System (See Fig. 1a).

 

(If in doubt leave this procedure to your installer).

 

Remove the bottom panel to gain access to the fill-

 

ing loop assembly.

 

Insert the bayonet end of the filling key into the

 

corresponding cut outs in the filling loop housing and

Grey

twist to lock the key in place.

Turn the grey knob anti-clockwise to allow water

Knob

ingress and fill until the required pressure is reached.

 

 

Turn the grey knob clockwise to stop filling and

 

remove the filling key by lining up the bayonet end of

Filling Key

the key with the cut outs in the filling loop housing and

 

withdrawing the key.

 

N.B. The key must always be removed from the

 

filling loop housing after the system has been filled to

 

prevent accidental filling and to comply with Bylaw 14

 

of the Water Bylaws Scheme.

 

Store the key in a safe place for future use and

 

refit the bottom panel.

 

OPEN VENTED HEATING SYSTEM

 

The appliance may be fitted to an open vented

 

heating system your installer will advise you. There is

 

no need to observe the pressure gauge.

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Bosch Appliances 35CDI II, 28CDI manual General Notes, Central Heating System, Sealed Heating System
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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.
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