To simplify your choice
JUNKERS gas heaters
Gas heating appliances are such gas heating appliances which, in addition to the burner, gas fittings and heat exchanger, also contain the parts necessary for the operation of the heating system: circulation pump, diaphragm expansion tank, safety valve, etc. Gas heaters can be hung on the wall and their power is usually 20… 35 kW – in the case of a device with a lower capacity, it is not possible to obtain sufficient hot water through the flow. Gas heaters are used for heating small (up to 300 m2) private houses and apartments and for the production of domestic hot water.
Heaters are different…
1. … in terms of the ignition principle of the main burner.
1.1 For pilot flame devices, the main burner is ignited from a continuously burning watch flame.
1.2 Electronically ignited devices are ignited by an electronically generated spark.
Junkers no longer produce any pilot flame devices. Electronically ignited devices are convenient for the user as there is no need to start manually.
2. in terms of combustion chamber construction.
2.1 Equipment with an open combustion chamber takes the air needed for combustion from the installation room and the combustion residues are directed to the chimney with natural draft.
2.2 Equipment with a closed combustion chamber includes a fan, by means of which the combustion residues are directed out through a special coaxial pipe and the combustion air is taken from the yard. In the absence of a better one, we call them “turbo” devices.
Appliances with an open combustion chamber are used if a suitable chimney with sufficient draft is available. The height of the chimney must be at least 4 meters and gas smoke must not be led into the same flue as solid fuel stoves or ventilation. “Turbo” devices are used when there is no chimney or when a short chimney does not provide sufficient natural draft.
3. in terms of the principle of domestic hot water production
3.1 Domestic hot water is produced by flow. The flowing water is heated, so the power required is high.
3.2 For domestic hot water, there is a tank in which the water is heated before consumption.
Flowing hot water production means that the appliance only produces hot water when the water tap is open. Such production of domestic water does not allow hot water to be obtained from the tap if the water flow is lower than the application level and does not allow to obtain more water than the capacity of the device allows. 20kW power means, for example, domestic water productivity with a temperature rise of 6 l / min? T ° = 50 ° C. It follows that equipment in which domestic water is produced by flow-through is only suitable for the needs of one family. If the hot water demand is higher or several consumers need water at the same time, then the only solution is to prepare the domestic water in the hot water tank.
4. … in terms of automation connectivity
Automating the operation of the heater is important for any heating system, providing savings in heating costs.
4.1 Setting the temperature from the boiler thermostat. In the simplest case, the user can manually adjust the parameters of the water leaving the device, but this usually tends to be delayed, which increases energy consumption.
4.2 Operation control of the room thermostat device. The apartment, the temperature of which is maintained by a room thermostat, must not be large (up to 80 m2). As the minimum heating capacity of the equipment is usually 7… 10 kW, in the case of small apartments, the room sensor prevents an excessive rise in the temperature of the apartment. The right choice of pilot room is very important to ensure the proper operation of the heating system. Better room thermostats allow you to set heating and saving times in a programmed manner, which also lowers heating costs. Heating in a system controlled by a room thermostat is cyclical: rooms are heated; then there is a waiting time and the rooms cool down; then heated again. NB! In a warm room, the radiator may be cold.
4.3 Controlling the operation of the device according to the outdoor temperature. The outdoor temperature automation calculates the temperature of the water entering the heating system according to the outdoor temperature according to the set heating schedule. Thus, the heating system is constantly running and the radiators are warm all the time, but when the outside temperature drops, their temperature rises and when it warms up, it drops again. In general, the automation also includes a timer that can be used to control the switching between heating and economy modes. Such temperature control is used in larger apartments and houses and in systems where radiator heating is combined with water floor heating.
5 … by product family
5.1 Ceraclass – ZW14-2DH KE, ZW14-2DH AE, ZS14-2DH KE, ZS14-2DH AE
The Ceraclass product family includes four models: a chimney connection and a turbo version for both direct domestic hot water production and connection to a tank. The heating capacity of the equipment is 14 kW, but still 24 kW for better production of domestic water. ZW units have a plate heat exchanger for domestic water production and the burner flame is modulated according to both the leaving water temperature and the flow rate. In ZS devices, the switch directs energy to the hot water tank if domestic water is required. The devices only allow you to add a room thermostat to control the heating. The equipment is supplied by the Junkers Potugal assembly plant.
5.2 CeraclassSmart – ZWA 24-2K, ZWA 24-2A, ZSA 24-2K, ZSA 24-2A
In appliances where hot water is produced by flow, the hot water circuit is located in the primary heat exchanger. In units with a boiler option, the energy is routed by means of a switch valve in the heating circuit of the tank – so a separate boiler charging pump is not required. In heating mode, automatic power setting (flame modulation) takes place according to the heat demand. The devices only allow the use of a room thermostat to control the heating. The equipment is supplied by the Junkers assembly plant in Turkey.
5.3 CeraclassExellence –
ZWC24-3MFK, ZWC24-3MFA, ZSC24-3MFK, ZSC24-3MFA
ZWC28-3MFK, ZWC28-3MFA, ZSC28-3MFK, ZSC28-3MFA
Equipment with a chimney connection of 24, 28 and 35 kW and a “turbo”, for the production of domestic water by flow or in a hot water tank. Equipped with a Bosch Heatronic-3 control unit and allows heating to be controlled by the outdoor temperature or by means of a room thermostat. When using additional automation FR or FW, it is possible to cascade the boilers and add different heating circuits. The combined DHW comfort level has been maximized (the DHW heat exchanger is kept constantly warm if necessary) and DHW recirculation can also be used if required. The equipment is supplied by the Junkers assembly plant in Turkey.
Explanation of type designation
Z – central heating (Zentralheizung)
W – the unit has a flow exchanger for the production of domestic hot water (Warmwasser)
S – the switch in the device allows hot water to be produced in a boiler (Speicher)
D – Display
H – Horizontal mounting plate
A – CeraclassSmart devices
C – CeraclassExellence series models
14; 24, 28 or 35 – The power of the device in kilowatts
2 or 3 – Product Generation Symbol
K – to connect the chimney (Kamingerät)
A – closed combustion chamber unit (Aussenwand)
MF – Multifunctional dashboard and digital control
Gaspre technical manager