Automatic hot water boiler ROJEK A 15 U
Automatic hot water boiler ROJEK A 15 U allows to burn automatically brown coal and wood pellets with a diameter of 6 - 8 mm, both quality white and with bark mixture. Thanks to the fuel tank, electronic control and the burner with screw feeder, the boiler can work in automatic mode for several days. The boiler is supplied with a 300 litre storage hopper placed on the right or left side. The ST 480 zPID control unit is standard with the boiler. This type of boiler meets the highest emission class 4 for brown coal and emission class 5 for pellet. This boiler meets EKODESIGN. This type of boiler has a controllable output of 3 - 15 kW and is designed for insulated buildings with low heat losses.
Product code: 1015004
Technical parameters
| Nominal power - brown coal | 3,4 - 15 kW |
| Nominal power - pellets | 3,5 - 15 kW |
| Efficiency - brown coal | 89 % |
| Efficiency - pellets | 89 % |
| Boiler class according to EN 303-5 - brown coal | 4 |
| Boiler class according to EN 303-5 - pellets | 5 |
| Energy efficiency class - brown coal | C |
| Energy efficiency class - pellets | A+ |
| Seasonal energy efficiency - brown coal | 79 % |
| Seasonal energy efficiency - pellets | 77 % |
| Boiler emissions according to Regulation (EU) 2015/1189 | EKODESIGN |
| Flue gas temperature range | 80 - 130°C |
| Specified chimney draft | 12 Pa |
| Dimensions (width x height x depth) | 1261 x 1498 x 960 mm |
| Chimney height | 625 mm |
| Chimney diam. (chimney extension diam.) | 130 (129) mm |
| Volume of standard fuel tank (right standard / left standard) | 300 l |
| Volume of fuel tank larger than standard | 500 l |
| Boiler water volume | 106 l |
| Boiler connections - inlet and outlet water diameter | G 2" |
| Electrical connection voltage | 230 V / 50 Hz |
| Maximum electric input | 71 W |
| Boiler weight | 300 kg |
Description of the boiler
The automatic hot water boiler A 15 U allows you to automatically burn brown coal with a grain size of 4 - 25 mm or wood pellets with a diameter of 6 - 10 mm, quality white, but also with a mixture of bark. A retort burner is installed in the boiler, which is designed on the principle of lower fuel supply to the combustion section and the combustion itself resembles burning in a forge. From the feed chamber, the fuel is fed by a feeder into the cast-iron retort tube. Here it is pushed upwards onto a circular grate. The retort is placed in a stirrer into which air is blown by a fan. The burnt fuel - ash and slag - falls over the edges of the grate into the ash tray.
The ROJEK A 15 U boiler is supplied with a 300 l fuel storage on the right or left side.
The boiler is equipped with a modulation unit ST 480 zPID.
This unit controls:
-
This unit controls:
- the burner fan (continuously controls the fan speed)
- the fuel feeder (controls the dosage according to the required output)
- the central heating circulating water pump (DHW)
- the hot water pump
- the boiler circuit pump
- the circulation pump
The controller includes a module for controlling a four-way or three-way mixing vent in the base. Furthermore, the ST 480 zPID controller can work with an equithermal sensor, with other four-way or three-way vents, with a room thermostat, with a GSM module, with a Wifi module and with an Ethernet module (via the Internet).
These hot water boilers meet the requirements of EN 303 - 5, Boiler Class 5 for pellet boilers and Boiler Class 4 for coal boilers. These boilers comply with EKODESIGN for wood pellet and brown coal fuel.
You will definitely appreciate this product
Horizontal tubular exchanger A 15 U
Retort burner A 15 U
Detail of boiler A 15 U
Katalog kotlů
(Katalog-TT-Rojek-final.pdf)
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