The heating system is essential to maintaining a comfortable and warm home. The boiler is also a crucial part of that system. If you’re thinking about getting a boiler for your house, you may be familiar with the brand "Drazice." Because of their dependability and efficiency, Drazice boilers—especially their indirect heating boilers—have grown in popularity. We’ll explore what makes Drazice boilers unique, how they work, the types that are available, how to connect them, and maintenance advice in this post.
Let’s first examine what makes Drazice boilers unique. The heating method used by Drazice boilers is indirect, in contrast to conventional boilers. This indicates that they use a heat exchanger to indirectly heat the water. This configuration has multiple benefits, such as increased energy efficiency and decreased corrosion risk because the heating water is kept apart from the boiler’s main circuit.
Let’s now examine the operation of these boilers in more detail. The boiler heats the water in its primary circuit first in the process. A heat exchanger absorbs heat from the primary circuit water as another loop of water flows through it. The house’s heating system then uses this heated water to circulate, warming radiators and underfloor heating systems. In addition to providing effective heat transfer, this indirect heating technique shields the boiler system from potential harm.
Depending on your unique requirements, there are a number of Drazice boiler types to take into consideration. Drazice offers a range of sizes and configurations, from small models perfect for smaller homes to larger units able to meet the demands of larger households. In addition, you have a variety of fuel options to select from, such as electric, propane, or natural gas, based on what best suits your home.
It’s not too difficult to connect a Drazice boiler to your home’s heating system, especially if you work with knowledgeable professionals. Your boiler will function at its best and last longer if it is installed correctly. To guarantee efficiency and safety, it is essential to abide by local building codes and manufacturer instructions.
Ultimately, the key to your Drazice boiler’s continuous smooth operation is maintenance. Peak performance is ensured and problems are avoided with routine servicing, which includes cleaning and inspecting components. Further enhancing boiler efficiency and lowering energy costs are best practices for energy-efficient heating, which include properly insulating your home and setting programmable thermostats.
Drazice’s indirect heating boilers are an excellent option if you’re looking for an efficient way to heat your house. These boilers are incredibly dependable and efficient because they heat water indirectly using a heat exchanger. They are available in different varieties to meet different needs, whether they are for a big house or a small apartment. They are easy to install and can be easily connected to your current heating system. After installation, these boilers run quietly and with little maintenance, giving your house a constant temperature. You can save money on energy expenses and have a warm and inviting living area with Drazice’s indirect heating boilers.
- Types of indirect heating tanks Drazice
- Hinged vertical and horizontal BKN Dražice
- Drazice floor standing boilers without side flange
- Floor mounted BKN Dražice with side flange
- Drazice floor standing boilers with top outlet
- Combi boilers Dražice with a heating element
- Drazice boilers for heat pumps
- Drazice indirect heating tanks connection diagrams
- Video on the topic
- Cut DRAZICE boiler after 14 years of operation.
- Indirect boiler Drazice OKC 200 NTR/BP
- Overview of DRAZICE water heaters of combined heating.
- Installation of indirect heating boiler drazice 125 liters.
- Combined and indirect boiler – what is the difference?? Device, connection, principle of operation.
- Indirectly heated boiler (IHB) How it works and how to tie it in
Types of indirect heating tanks Drazice
- tank (stainless steel or plain steel, black metal with internal glass-ceramic coating);
- inputs/outputs for connection to the heat source, discharge points. Spigot openings are typically 3/4" (26.8 mm) in diameter;
- service hatch;
- boiler thermostat;
- 3-way valve, circulation pump (standard 230 V/50 Hz);
- inside:
♠ Temperature sensors and immersion housings beneath the controller;
♠ Heat exchanger: coil connected to the boiler, either single or double circuit; one or two
♠ Built-in electric heating elements (TENS) in combined models help to keep the tank temperature stable;
♠ non-corrosive titanium anode (which requires a separate power source) or magnesium anode (which is gradually "eaten" by the environment);
- outside the indirect boiler is covered with thermal insulation (polyurethane foam 30 – 50 mm), closed casing made of thin sheet metal or polypropylene;
- on the front of the Drazice indirect boiler there is a control unit, thermometer scale (digital, mechanical);
- additional units: drain cock, safety valve, automatic air vents.
There is a floor version of the Drazice stationary indirect heating tanks with two heat exchangers.
"Tank in a tank," featuring a thermal jacket (part of the horizontal boiler Drazice series):
- external elements are standard – insulated tank, outlets/inlets for liquid, thermometer scale, control, pump, three-way valve, thermostat. Outer casing of steel, it is also a water (thermal) jacket;
- inner tank made of stainless steel. The walls are corrugated to increase/compress during heating/cooling, increasing the heat exchange area. The surface is self-cleaning due to its mobility;
- the space between the casing is filled with the heat transfer medium (+80… +90 °C);
- inside there is a sleeve with a temperature lock, supply/return tubes;
The direct heating element in Drazice combination boilers keeps the temperature constant (as determined by the thermostat) or activates when the heating is not needed, as in the summer.
The BCN with a thermal jacket has the following general technical characteristics: the DHW circuit’s useful capacity is 70% of the total volume, and its 100 liter capacity has an output of 18 kW at 1.03 m² of heated surface, with a fill time of 10 minutes.
Benefits of a horizontal boiler’s shingle heat exchanger: far more efficient than coil models, the heated BKN can serve as a flow-through tank. If the boiler heating apparatus delivers the estimated heat transfer fluid consumption, the heat exchange area is adequate for heating "on the run." Example: 1.5 to 2.5 kWh are needed for a 100-liter tank (70-liter DHW tank).
- Heat transfer medium (+70… +90 °C) is poured through the upper pipe of the heat exchanger – the technical resource is taken from any external heat sources, e.g. from the house system or heating boiler.
- Cold (sanitary) water is supplied to the tank from a water source (water pipe, well).
- The heat transfer medium gives off heat, the cooled one returns to the heat generator and is heated again. The heating element is used to accelerate heating or in case of heating system interruptions.
- Extraction is from the upper segment, replenishment is from below.
Unlike traditional electric water heaters, the BKN’s heating elements heat the heating medium rather than the sanitary water. The pump provides circulation in the event that the source has no head. Compared to traditional boilers, costs are lower, the working fluid is delivered already heated, and its circulation boosts productivity.
Hinged vertical and horizontal BKN Dražice
Models suspended provide better ergonomics. Two- or three-way valves, fuses, terminals, and a thermostat for the circulation pump are included in Drazice indirect wall-mounted boilers with vertical installation. Boilers that are positioned horizontally share the same equipment, including heating components.
| Type | OKC 100 NTR | OKC 125 NTR | OKC 160 NTR | OKC 200 NTR | OKC 250 NTR |
|---|---|---|---|---|---|
| Volume (l) | 87 | 112 | 148 | 208 | 242 |
| Boiler weight (kg) | 53 | 66 | 73 | 93 | 92 |
| Boiler height (mm) | 902 | 1 067 | 1 255 | 1 398 | 1 542 |
| Boiler Ø (mm) | 524 | 524 | 524 | 584 | 584 |
| Heat transfer area. (м²) | 1.08 | 1.45 | 1.45 | 1.45 | 1.45 |
| Operating pressure of heat exchangers. (MPa) | 1 | 1 | 1 | 1 | 1 |
| Max.temp. warm water (°C) | 90 | 90 | 90 | 90 | 90 |
| Connection voltage | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz |
| Nominal. heating. power at temperature. 80°C and flow rate 720 l/hour (W) | 24 000 | 32 000 | 32 000 | 32 000 | 32 000 |
| Heating time from 10°C to 60°C (minutes) | 13 | 12 | 16 | 23 | 26 |
| Coeff. electrical safety | IP 42 | IP 42 | IP 42 | IP 42 | IP 42 |
| Static loss (W) | 42 | 54 | 75 | 82 | 87 |
| Type | OKC 200 NTRR | OKC 250 NTRR |
|---|---|---|
| Volume (l) | 200 | 234 |
| Boiler weight (kg) | 102 | 104 |
| Boiler height (mm) | 1 362 | 1 542 |
| Boiler Ø (mm) | 584 | 584 |
| Heat transfer area. (м²) | 1×2 | 1×2 |
| Working pressure of the tank (MPa) | 0.6 | 0.6 |
| Operating pressure of the heat exchanger. (MPa) | 1 | 1 |
| Max.tempo. of warm water (°C) | 90 | 90 |
| Connection voltage | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz |
| Nominal. heater. power at temperature. 80°C heat transfer medium and 720 l/hour flow rate (W) | 2× 24 000 | 2× 24 000 |
| Heating time from 10°C to 60°C (minutes) | 14/14 | 14/23 |
| Coeff. electrical safety | IP 42 | IP 42 |
| Static loss (W) | 82 | 87 |
| Type | OKCV 125 | OKCV 160 | OKCV 200 |
|---|---|---|---|
| Volume (l) | 125 | 152 | 200 |
| Nominal overpressure (MPa) | 0.6 | 0.6 | 0.6 |
| Voltage (V) | 230 | 230 | 230 |
| Demand. power (W) | 2 000 | 2 000 | 2 200 |
| Coeff. electrical safety | IP 44 | IP 44 | IP 44 |
| Boiler height (mm) | 1 046 | 1 235 | 1 287 |
| boiler Ø (mm) | 524 | 524 | 584 |
| Boiler weight without water (kg) | 63 | 69 | 85 |
| Time for heating water from 10°C to 60°C with the heating element (hours) | 3.8 | 5 | 5.5 |
| Max. operating overpressure (MPa) | 0.4 | 0.4 | 0.4 |
| Heating area. (м²) | 0.7 | 0.7 | 0.75 |
| Nominal heating. power at temperature. 80°C and 310 l/hour flow rate (W) | 10 260 | 10 260 | 11 000 |
| Max. heating water heating time. from 10°C to 60°C (minutes) | 43 | 53 | 72 |
| Nominal heating. power at temperature. Heat transfer medium 80°C and flow rate 310 l/hour (W) | 16 800 | 16 800 | 18 000 |
| Max. heating time. from 10°C to 60°C (minutes) | 26 | 35 | 43 |
Drazice floor standing boilers without side flange
One of the limitations of Drazice indirect boilers without a side connection flange for heating elements is that a tube heater cannot be connected.
| Type | OKC 100 NTR | OKC 125 NTR | OKC 160 NTR | OKC 200 NTR | OKC 250 NTR |
|---|---|---|---|---|---|
| Volume (l) | 87 | 112 | 148 | 208 | 242 |
| Boiler weight (kg) | 53 | 66 | 73 | 93 | 92 |
| Boiler height (mm) | 902 | 1 067 | 1 255 | 1 398 | 1 542 |
| Ø boiler (mm) | 524 | 524 | 524 | 584 | 584 |
| Heating area. (м²) | 1.08 | 1.45 | 1.45 | 1.45 | 1.45 |
| Working pressure of the heat exchanger. (MPa) | 1 | 1 | 1 | 1 | 1 |
| Max.temp. warm water (°C) | 90 | 90 | 90 | 90 | 90 |
| Connection voltage | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz |
| Nominal. heating. output at temperature. 80°C heat transfer medium and flow rate 720 l/h (W) | 24 000 | 32 000 | 32 000 | 32 000 | 32 000 |
| Heating time from 10°C to 60°C (minutes) | 13 | 12 | 16 | 23 | 26 |
| Coeff. electrical safety | IP 42 | IP 42 | IP 42 | IP 42 | IP 42 |
| Static loss (W) | 42 | 54 | 75 | 82 | 87 |
| Type | OKC 200 NTRR | OKC 250 NTRR |
|---|---|---|
| Volume (l) | 200 | 234 |
| Boiler weight (kg) | 102 | 104 |
| Boiler height (mm) | 1 362 | 1 542 |
| Boiler Ø (mm) | 584 | 584 |
| Heat transfer area. (м²) | 1×2 | 1×2 |
| Tank operating pressure (MPa) | 0.6 | 0.6 |
| Operating pressure of the heat exchanger. (MPa) | 1 | 1 |
| Max.temperature. warm water (°C) | 90 | 90 |
| Connection voltage | 1 P-EN AC 230 V/50 Hz | 1 P-EN AC 230 V/50 Hz |
| Nominal. heating. power at temperature. of 80°C heat transfer medium and a flow rate of 720 l/hour (W) | 2× 24 000 | 2× 24 000 |
| Heating time from 10°C to 60°C (minutes) | 14/14 | 14/23 |
| Coeff. electrical safety | IP 42 | IP 42 |
| Static loss (W) | 82 | 87 |
Floor mounted BKN Dražice with side flange
For the purpose of increasing the heating speed or enabling operation during the heating equipment shutdown period, the user must have a side flange for the heating element. Apart from the aforementioned, the flange permits an additional inspection of the tank in addition to the service hatch (flange inspection hatch). Flanged BKN Dražice costs between 2000 and 3000 p.m. on average more.
| Type | OKC 160 NTR/BP | OKC 200 NTR/BP | OKC 250 NTR/BP |
|---|---|---|---|
| Volume (l) | 148 | 208 | 242 |
| Boiler weight (kg) | 76 | 92 | 94 |
| Boiler height (mm) | 1 052 | 1 362 | 1 542 |
| Boiler Ø (mm) | 584 | 584 | 584 |
| Operating pressure of the tank (MPa) | 0.6 | 0.6 | 0.6 |
| Working pressure of heat exchanger. (MPa) | 1 | 1 | 1 |
| Max.temp. heat transfer medium (°C) | 110 | 110 | 110 |
| Max. temp. warm tech. water (°C) | 90 | 90 | 90 |
| Lower heat transfer area. (м²) | 1.45 | 1.45 | 1.45 |
| Heat output. (HT/WT) (kW) | 32 | 32 | 32 |
| Heating time from 10°C to 60°C (heat transfer time).) (minutes) | 16 | 23 | 32 |
| Constant hot water capacity* heat rate. (l/hour) | 990 | 990 | 990 |
| Load profile | С | С | С |
| Static loss (W) | 75 | 82 | 87 |
| Type | OKC 200 NTRR/BP | OKC 250 NTRR/BP |
|---|---|---|
| Volume (l) | 200 | 234 |
| Boiler weight (kg) | 103 | 107 |
| Boiler height (mm) | 1 362 | 1 542 |
| boiler Ø (mm) | 584 | 584 |
| Tank working pressure (MPa) | 0.6 | 0.6 |
| Operating pressure of heat exchanger. (MPa) | 1 | 1 |
| Max.temp. heat transfer fluid (°C) | 110 | 110 |
| Max. temp. heat. techs. water (°C) | 90 | 90 |
| Max. temp. warm tech. water (m²) | 1 | 1 |
| Top heat transfer surface. (м²) | 1 | 1 |
| Lower/upper heat output. (HT/WT) (kW) | 2× 24 | 2× 32 |
| Constant capacity TUV*/NT/VT (l/hour) | 670/650; 1 080** | 670/650; 1 080** |
| Heating time from 10°C to 60°C (heat treatment.) (minutes) | 14/14 | 14/17 |
| Load profile | С | С |
| Static loss (W) | 82 | 87 |
| Type | OKC 300 NTR/BP | OKC 400 NTR/BP | OKC 500 NTR/BP | OKC 750 NTR/BP | OKC 1000 NTR/BP |
|---|---|---|---|---|---|
| Volume (l) | 296 | 373 | 447 | 725 | 945 |
| Ø (mm) | 670 | 650 | 700 | 910 | 1 010 |
| Boiler height (mm) | 1595 | 1919 | 1892 | 1998 | 2025 |
| Boiler weight (kg) | 108 | 139 | 137 | 216 | 284 |
| Working pressure of warm tech. water (MPa) | 1 | 1 | 1 | 1 | 1 |
| Operating pressure of the heat carrier (MPa) | 1 | 1 | 1 | 1 | 1 |
| Max. tempo. coolant (°C) | 110 | 110 | 110 | 110 | 110 |
| Temperature. warm tech.water (°C) | 90 | 90 | 90 | 95 | 95 |
| Heat transfer area. (м²) | 1.5 | 2 | 2 | 3.7 | 4.5 |
| Heat transfer capacity. at temp. of heating water 80°C and flow 720 l/hour (kW) | 35 | 58 | 59 | 99 | 110 |
| Heating time from 10°C to 60°C (heat transfer medium (°C)).) (minutes) | 30 | 22 | 26 | 24 | 26 |
| Static loss (W) | 83 | 109 | 121 | 143 | 170 |
Drazice floor standing boilers with top outlet
The selection of Dražice BKN models with varying outlet arrangements is based on the boiler connection’s technical capabilities. For instance, if a floor version of the boiler is installed and it is hinged, the top connection of the BKN is selected because the heat generator it is connected to is situated above. Horizontal models are characterized by a side connection.
Combi boilers Dražice with a heating element
Boilers that combine electric heating and an external heat source function as combination boilers. Versatility is increased by the inclusion of a heating element with thermostat in addition to the external heat source:
- disconnection of the heating system (outside the heating season or during service maintenance) will not affect the work – heating will be TEN;
- the device can work simultaneously with another source, increasing the temperature if it is insufficient or accelerating the work.
½ combi boilers There is a flange opening on the drip tray for heating element replacement and installation. Water heater electric power consumption: 2.3 – 3.6 kW.
Electric heating elements are incorporated into Drazice combination indirect storage water heaters.
| Type | OKCE 100 NTR/2.2 kW | OKCE 125 NTR/2.2 kW | OKCE 160 NTR/2.2 kW |
|---|---|---|---|
| Volume (l) | 87 | 113 | 148 |
| Boiler weight without water (kg) | 58 | 70 | 80 |
| Boiler height (mm) | 902 | 1067 | 1047 |
| Boiler Ø (mm) | 524 | 524 | 584 |
| Tank operating pressure (MPa) | 0.6 | 0.6 | 0.6 |
| Operating pressure of the heat carrier (MPa) | 1 | 1 | 1 |
| Max. temp. coolant temperature (°C) | 110 | 110 | 110 |
| Max. temp. TUV* (°C) | 90 | 90 | 80 |
| Pov. heating of the lower heat exchanger. (м²) | 1.08 | 1.45 | 1.45 |
| Lower/upper heat output. (HT/WT) (kW) | 24 | 32 | 32 |
| TUV*/NT/VT continuous capacity (l/hour) | 610 | 990 | 990 |
| Heating time from 10°C to 60°C (heat transfer time).) (minutes) | 14 | 14 | 17 |
| Heating time from 10°C to 60°C (el. element) (hours) | 2.3 | 3 | 4.5 |
| Coeff. electrical safety | IP 42 | IP 42 | IP 42 |
| Static loss (W) | 42 | 54 | 75 |
| Type | OKCE 200 NTR/2,2 kW | OKCE 250 NTR/2.2 kW | OKCE 300 NTR/2.2 kW | OKCE 300 NTR/3-6 kW |
|---|---|---|---|---|
| Volume (l) | 208 | 241 | 294 | 292 |
| Weight of boiler without water (kg) | 95 | 96 | 113 | 116 |
| Boiler height (mm) | 1357 | 1537 | 1581 | 1581 |
| Boiler Ø (mm) | 584 | 584 | 670 | 670 |
| Tank operating pressure (MPa) | 0.6 | 0.6 | 0.6 | 0.6 |
| Operating pressure of the heat transfer medium (MPa) | 1 | 1 | 1 | 1 |
| Max. temp. coolant (°C) | 110 | 110 | 110 | 110 |
| Max. temp. TUV* (°C) | 80 | 80 | 80 | 80 |
| Pov. heating of the lower heat exchanger. (м²) | 1.45 | 1.45 | 1.08 | 1.08 |
| Lower/upper heat output. (HT/WT) (kW) | 32 | 32 | 35 | 35 |
| TUV*/NT/VT continuous output (l/hour) | 990 | 990 | 1100 | 1100 |
| Heating time from 10°C to 60°C (heat transfer time) (heat transfer time from 10°C to 60°C).) (minutes) | 22 | 28 | 24 | 24 |
| Heating time from 10°C to 60°C (el. (hours) | 5.5 | 6.5 | 8.5 | 8.5 |
| Coeff. electrical safety | IP 42 | IP 42 | IP 42 | IP 42 |
| Power consumption (kW) | 2.2 | 2.2 | 2.2 | 2020-06-03 00:00:00 |
| Static loss (W) | 96 | 93 | 83 | 83 |
| Type | OKCE 200 NTRR/2.2 kW | OKCE 250 NTRR/2,2 kW | OKCE 300 NTRR/2,2 kW | OKCE 300 NTRR/3-6 kW |
|---|---|---|---|---|
| Volume (l) | 208 | 2235 | 288 | 285 |
| Boiler weight without water (kg) | 107 | 108 | 128 | 135 |
| Boiler height (mm) | 1357 | 1537 | 1581 | 1581 |
| boiler Ø (mm) | 584 | 584 | 670 | 670 |
| Tank operating pressure (MPa) | 0.6 | 0.6 | 0.6 | 0.6 |
| Operating pressure of the coolant (MPa) | 1 | 1 | 1 | 1 |
| Max. temp. heat transfer fluid (°C) | 110 | 110 | 110 | 110 |
| Max. temp. TUV* (°C) | 80 | 80 | 80 | 80 |
| Pov. heating of the lower heat exchanger. (м²) | 1.08 | 1.08 | 1.08 | 1.08 |
| Pov. upper heat exchanger heating. (м²) | 1.08 | 1.08 | 1.08 | 1.08 |
| Lower/upper heat output. (NT/VT) (kW) | 2 ч 24 | 2 ч 24 | 35 | 35 |
| TUV*/NT/VT continuous capacity (l/hour) | 670/650 | 670/650 | 1100 | 1100 |
| **1080 | **1080 | |||
| Heating time from 10°C to 60°C (heat exchanger.) (minutes) | 28 | 36 | 24 | 24 |
| Heating time from 10°C to 60°C (el. element) (hours) | 5.5 | 6.5 | 8,5/6,3 | 8,5/6,3 |
| Coff. electrical safety | IP 42 | IP 42 | IP 42 | IP 42 |
| Power consumption (kW) | 2.2 | 2.2 | 2.2 | 2020-06-03 00:00:00 |
| Static loss (W) | 96 | 93 | 83 | 83 |
Drazice boilers for heat pumps
One way to improve the economy of Drazice hot water tanks is to use environmentally friendly, alternative sources.
The heat pump extracts heat from its surroundings, such as subterranean space. Below the freezing point, a network of pipes is buried and connected by a collector. Solar heating can be added to equipment. The system’s boilers feature twin designs, larger area heat exchangers, and heating elements.
| Type | OKC 250 NTR/HP | OKC 300 NTR/HP | OKC 400 NTR/HP | OKC 500 NTR/HP | OKC 750 NTR/HP | OKC 1000 NTR/HP |
|---|---|---|---|---|---|---|
| Volume (l) | 234 | 286 | 352 | 469 | 710 | 930 |
| Boiler weight without water (kg) | 119 | 133 | 190 | 223 | 259 | 324 |
| Boiler height (mm) | 1537 | 1 558 | 1 644 | 1 914 | 2039 | 2053 |
| Ø boiler (mm) | 584 | 670 | 700 | 700 | 950 | 1050 |
| Tank operating pressure (MPa) | 1 | 1 | 1 | 1 | 1 | 1 |
| Working pressure of the heat exchanger. (MPa) | 1 | 1 | 1 | 1 | 1 | 1 |
| Max. temp. heat transfer medium (°C) | 110 | 110 | 110 | 110 | 110 | 110 |
| Temp. warm tech.water (°C) | 90 | 90 | 90 | 90 | 90 | 90 |
| Heating area. (м²) | 2.5 | 3.2 | 5.2 | 6.4 | 7 | 9 |
| Heat transfer volume. (л) | 17 | 21 | 32 | 39 | 47 | 63 |
| Energy efficiency class | C | C | C | C | C | C |
| Static loss (W) | 87 | 72 | 90 | 105 | 140 | 167 |
Drazice indirect heating tanks connection diagrams
- The first step is the cold water connection:
- Through the bottom inlet to the supply line.
- To the upper spigot connect the connection to the water points.
- The second stage is to the heating medium:
- Hot water supply – to the upper inlet, discharge of cooled coolant – through the lower outlet.
An automatic two-circuit system is created using a unique variant of the scheme that includes a 3-way valve:
- Main heating.
- BKN circuit.
Three-way valve equipment operation: the unit uses thermoregulator commands to control the system. Setting values for the heater’s operating algorithm is possible with the thermostat device. The hot stream is diverted to the coil by the controller when the device’s t° in DHW falls to the predetermined minimum. The device operates in reverse, with the coolant flowing to its source, when the fixed values are reached.
Detailed installation schematic for the water supply and heating systems connected to the Dražice indirect heating boiler:
Shut-off valves are located at the coolant inlet and outlet to facilitate heater disassembly. To cut down on heat loss, all of these units are situated nearer the BKN. It is necessary to install a pre-washed filter in the circuit to guard against system clogging. It’s crucial that all lines have thermal insulation. Installing a drain valve and a safety valve (on the branch) is always required when connecting to the water supply.
Diagram connecting the water supply solid fuel boiler to the Drazice indirect heating tank with recirculation (cut-off valves are not shown, but they are required to disconnect the water heater before servicing):
Because the DHW tank compresses and expands, it is advised to connect an expansion tank and safety nodes at the coolant outlet when connecting a shingled jacket tank.
When mounted boilers with a specific connector are used, connecting the BKN is the simplest option. Through a three-way valve that is operated by an electric actuator under the control of the boiler thermostat, other heat generators are connected to the tank.
Diagram of the connections between Drazice boilers and 3-way valves for boilers with two circuits:
Diagram showing how to connect a single-circuit boiler to an indirect heating tank made by Drazice:
Making a connection with two pumps is also appropriate, as the flows will go through two lines. The warm water circuit is in first position. BKN is adjusted to the scheme in conjunction with a single-circuit boiler. Check valves in front of the pumps ensure that the characteristics remain unchanged even in multi-temperature flows. The boiler is the only source of hot liquid.
When solar energy is connected to the water heater’s second coil, a full closed cycle including a water accumulator, pump, and safety elements is created. The collector sensors require their own CU.
If there are nearby appliances to discharge, make the connection on the water supply side. In order for the liquid to flow out when the drain is opened, the drain pipe is left full. The piping includes an expander (6–8 bar) that is the same size as the water supply.
If your customers are spread out, set up a recirculation pipeline with a pump and check valve. A return pipe is cut into the cold inlet if the BCU is not equipped with a connection socket.
Connecting to the electrical grid is a different step; the typical plan looks like this:
| Description | Indirect heating boilers by Drazice are systems designed to heat water indirectly, utilizing a heat exchanger. |
| How they work | These boilers work by transferring heat from a primary heat source, such as a central heating system or solar panels, to water stored in a separate tank. |
| Types | Drazice offers various types of indirect heating boilers, including models with different capacities and features to suit different household needs. |
| Connection | They are typically connected to the primary heat source and a separate hot water storage tank, ensuring efficient heat transfer and distribution. |
| Operation | Once connected, the boiler operates by circulating hot water through the heat exchanger, warming up the water in the storage tank for later use. |
Drazice’s indirect heating boilers provide a dependable and effective way to heat your house. These boilers heat the water in an independent storage tank by transferring heat via a heat exchanger from a primary heat source, such as a gas or oil boiler. This technique contributes to maintaining a high degree of energy efficiency in addition to guaranteeing a steady supply of hot water.
Drazice offers a variety of indirect heating boiler types, each intended to satisfy various heating needs and preferences. Drazice provides a variety of options to suit different needs, ranging from small models ideal for smaller homes to larger systems capable of providing hot water for larger households. Furthermore, the ease of integration with current heating systems is made possible by the versatility of installation options.
Drazice boiler connections and functions are made to be simple and easy to use. A qualified professional can efficiently complete installation with the manufacturer’s clear instructions. After installation, these boilers require little upkeep and deliver dependable performance, giving homeowners comfort and peace of mind all year round.
To sum up, Drazice indirect heating boilers provide a practical and efficient way to maximize energy efficiency while preserving a cozy home atmosphere. These boilers are a dependable option for providing hot water and heating in residential settings because of their easy connection and operation, efficiency, and variety of types and sizes. Purchasing a Drazice boiler guarantees warmth and comfort while also promoting environmental sustainability and energy savings.
