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Gas boilers Protherm TLO

On my Protherm Medved 30 TLO floor-standing boiler, this is what was discovered: the flame flared up a couple of times. What could be the reasons? The gas pressure was not measured with the device, but according to subjective sensations (the burner is running quieter), it has dropped. Or could such a phenomenon also appear due to a decrease in cravings? The weather has changed. This didn't happen before.

We need to watch everything. Gas pressure first. Remove the burner and clean it.

Boiler Proterm TLO 30, 7 years in operation. In the fall, I decided to fix it, took it all apart, cleaned the carbon deposits inside, cleaned the pilot burner, adjusted the thermogenerator according to the tester, everything seemed to be fine, but the pilot didn’t keep burning. The reason turned out to be the contacts of 2 safety relays (with red buttons), only after cleaning them did everything work. Now the thermogenerator has started to work poorly, so I can’t
caught the situation and this thought arose: I’m tired of adjusting the thermogenerator, but what bad could happen if I put 5-10 volts through the room thermostat relay to the terminals where the thermogenerator is connected? That is, should the voltage be applied only when the temperature drops? Accordingly, direct adjustment is obtained. The air temperature in the room has dropped, the boiler has turned on and runs until the temperature rises. And set the thermostat of the boiler itself to 70 degrees.

There is no need to invent anything, the unit is simple, so look for either a weak contact, or a sensor, or the thermogenerator could have become worn out over 7 years.

I have had various faults on my Protherm 40 TLO gas boiler since 2012, I fixed them myself and with the help of specialists. Now a problem arose: somewhere in mid-January, when the main burner was running, the smell of gas began to be felt and is still present. The emergency thermostats never worked. As I understand it, at the end of the heating season it is necessary to carry out boiler maintenance. I'm thinking of checking the operation of the draft thermostat and cleaning the burners. I have cleaned the ignition one before, but never the main one. Tell me how to clean it, how to disassemble it and what to clean?

You need to do full maintenance. Therefore, the most optimal and rational thing is to call a specialist from the service department and let him carry out full maintenance (cleaning, setting up, adjusting, checking operation).

The floor-standing boiler Protherm 20 TLO is in operation. After turning off the gas for maintenance work, another problem was added. When the main burner was turned on, it somehow began to burn differently, it seemed like it was stronger or something. When the viewing window is open, a blue flame flies out of it; if I close the window, then after a while the unit turns off and both burners go out. I measure the voltage on the pilot burner thermocouple, under load, about 12 mV. I close the window, the voltage begins to drop slowly, after a while it drops to less than 5 mV, and both burners go out. I think this also shows that the main burner needs to be cleaned or the gas pressure adjusted. But I have nothing to measure the gas pressure with, and the adjusting screw is flooded. For now, I got out of the situation by “pressing down” the gas with the valve at the inlet, so that the flame did not fly out of the window. Well, until the device turns off. First I want to clean the main burner. I read that they are blowing it out. How is that? Do I need to disassemble, remove the burner, then blow with compressed air?

Disassemble completely. Wash the heat exchanger for a long time until the soot stops coming out. Now the burner: Remove. Unscrew everything and rinse and blow under maximum pressure.

We connected and started up the Proterm Medved TLO 30 boiler. The wick burns, but the electric valve of the main burners does not work. Tell me what voltage the multiple thermocouple should produce, sufficient for the solenoid valve to operate. What else could be the cause of this phenomenon, and what could be the solution?

If insufficient voltage comes to the main burner valve from the thermo-EMF generator (through the thermostat), this is the result.

Proterm Bear 20 TLO. The pilot light goes out periodically. After turning on the cooled boiler after igniting the pilot and turning on the main burner, it may also turn off. There is a suspicion of a traction reset sensor. How to check that these shutdowns can occur due to the activation of emergency temperature and draft sensors? How can I check them separately?

Excluding them from the circuit for a while, replacing them with a jumper, but only for testing. The traction sensor can be checked easily - with a millivoltmeter - when working on it, it should not drop more than 4 mV.

Proterm TLO 40 the main burner does not start, the wick is burning. What could be wrong?

The temperature sensor is faulty or its setting is incorrect (should produce about 820 mV), it may be necessary to carry out preventive maintenance.

I decided to repair the Protherm 40 TLO, namely, clean the pilot burner. He took off the tube, unscrewed the bar on which the thermocouple, thermogenerator, burner and igniter were located. A burner made of two plates, one on top, the other on bottom. On the sides and front there are 3 round channels, 3 flames, the thermogenerator heats on the left, the main burner lights on the front, and the thermocouple heats on the right. I looked, the tip of the thermocouple is further than the right channel,
I unscrewed the thermocouple and placed it exactly opposite the channel. I wanted to clean the burner, but I didn’t understand how or what to clean. I only cleaned the jet with a thin needle. I assembled everything, turned it on, and began to measure the voltage, under a load of 22 mV. Directly on the valve 13.5 mV, more than a fourfold reserve (snaps off at 2.5-3 mV, time after turning off the gas is 30 seconds). But most importantly, the tension does not float as before, but
practically stands still (somewhere the run-up is only 0.2-0.3 mV for any switching on of the main burner). With the old thermocouple, the gap is also very large, it turns out that the thermocouple was installed incorrectly at the factory, and on the new boiler, the shutdown time was about 10 seconds. Well, now let's see how long this thermocouple will work. From time to time, I will measure the thermocouple voltage.

The TLO 20 boiler is connected to the system. The device is completely new and is already operating. The temperature delta is two degrees. It heats up for a minute, cools down for three, and so on for days. Is it possible to set it to a large temperature difference so that there is no clocking?

A Medved 30 TLO boiler was installed in the system. Worked well. In the summer, only heated towel rails were heated through it. The heating is now turned on. The temperature was set to 50 degrees. It builds up heat, then turns off, and the batteries cool down. And it won't turn on anymore. If immediately after it turns off, you increase the temperature, it starts. It also works if you click the piezo ignition. What's wrong?

We launched a new boiler 40 TLO (floor-standing, non-volatile). The system is gravity, but there is a pump. And immediately - that is, from the first start - questions arose: After starting, it worked for several minutes, warmed up to a certain temperature and turned off. I decided to call specialists for insurance. They arrived and said that this unit would not work without a pump! It's strange, because it is non-volatile. The boiler started up with the pump and is now working well. Will such a unit work without a pump or not? If not, why not? Now I'm purchasing a new device. Since it is under warranty, I draw up an agreement with a service organization. Is it the responsibility of the service organization to repair the boiler? The fact is that after installation it turned out that the thermometer was set to 0 - i.e. The thermometer needs to be replaced. At whose expense should this be done? Again, the specialists who connected the unit expressed doubt that the pipe coming out of it should be as hot as it is. The chimney is in the wall of the house, brick, height 12 m. I checked the chimney - clean (well, not counting the soot left over from the previous one). There is supply ventilation, and the window is also always open. Boiler room in the basement. The unit is connected to the chimney through a stainless steel pipe D150 mm - i.e. a pipe about 40 cm high goes up from it, then a 90-degree turn and another 30 cm of pipe to the chimney in the wall. Did I do everything right?

Its heat exchanger consists of cast iron sections, similar to those familiar to everyone cast iron batteries. The burner heats the heat exchanger and the water in it expands, i.e. its density becomes less. At the top of the heat exchanger there is an outlet (supply). “Light” water begins to rise upward and is replaced by cold “heavy” water from the pipe below (return). Thus, a circular movement of water occurs in the heating system, which is called circulation. The higher the column of “light” water, the more power, moving it through the system. For this reason, after leaving the boiler, a high vertical section is organized, which will create this draft. Until this area warms up, traction will be poor. During initial startups, it happens that air pockets remain in the system, which impede the movement of water. Any narrowings also impede movement. Have you done all this? If the heating system is made correctly, then the TLO will work without a pump. But circulation is provided by the heating system, not the boiler. The warranty implies the free elimination of defects that arose due to the fault of the manufacturer. If the thermometer has been faulty since purchase, you may wonder why this was not recorded at the time of purchase.

The results of repairing the Protherm TLO 20 boiler. Finally, I took a multimeter with me. I measured the voltage without load: 17 mV. I went to the store and bought a thermocouple, although not my original one, but the thread for the SIT NOVA fit. No-load voltage: 38 mV. I connected everything as it was, under a load of 24 mV. It would seem that everything is fine, but I monitored it with the boiler running, when the main burner was turned on, the voltage first increased for 10 seconds, then began to gradually drop. At the end of a long heating cycle (about 15 minutes), the voltage across the valve was 8 mV, after turning off the main burner it dropped further to 6.5 mV. Then it began to rise after 1.5 minutes to 12 mV at the valve and again 24 at the thermocouple output. On the protective wires
the circuit drops 12 mV, i.e. 50%. Thus, at the very critical moment There was only 1 mV left before the valve turned off. The voltage at which the valve turns off is about 5.5 mV (turned off the gas and measured until it clicked: 5.5 mV, time 15 s). The wires of this circuit are made with only 1.5 square meters of wire. mm, replaced the wires with 4 sq. mm, won 4 mV. So far these 3 days it hasn’t turned off even once, I left it on for a week, let’s see how it goes. What is the reason for this effect? Maybe there's not enough oxygen and I need to think about supply ventilation to the boiler room? Or is this a consequence of a “badly executed” burner? I haven’t decided to drill out the burner yet, I think I should first buy a new spare one and experiment with it. By the way, where can I find a catalog of spare parts for 20 TLO?

There is a suspicion that the thermocouple is inserted too deep. Its tip should warm up. It is possible that the gas pressure in dynamics is low. And 17mV is very little. You need at least 20-25.

Boiler Bear 50 TLO. Now the temperature outside has dropped to -40 degrees, the working thermostat is at maximum, the thermometer shows an interval from 60 to 75 degrees, and the automation is activated. How to make (adjust) so that the temperature rises to 90 degrees, because... Our temperature drops to -50 degrees. And the room is already cold.

As for the “pilot” screw, it was basically in vain to turn it, it only controls the flame on the ignition burner, that is, it is designed to heat up the control thermocouple gas valve. In simple terms, it’s like gas control in a gas stove, the flame disappears - the gas is shut off. To adjust the main burner, which heats your heat exchanger, a gas balancing screw is used. It is located under the control knob on the valve - such a large screw for a straight screwdriver. You unscrew this plug screw, there is an adjusting screw under it, turn it clockwise - you increase the pressure on the burner, counterclockwise - you decrease it.

What are the specifics of connecting the Protherm B100S boiler to the non-volatile boiler Protherm TLO 50? The water in the boiler coil apparently moves forcefully, and the heating system is supposed to have an EC, are these completely independent cycles?

If you connect the boiler according to a circuit with a feed pump, the boiler ceases to be non-volatile, the board is changed, and pumps are added. If through a 3-way valve, one pump will be needed, again the system ceases to be energy independent.

Installation and operation

The Protherm Bear gas boiler has the following type range: 20, 30, 40, 50 TLO.

The Proterm Bear TLO boiler is completely independent from an external source electrical energy. It is designed to work in gravity heating systems (with natural circulation). Usage cast iron heat exchanger allows you to ensure stable and trouble-free operation of the unit at partial load, i.e. when it only works with low temperatures coolant. Full power used only during a small part heating season, and the rest of the time the device operates at partial heating load.

At the same time, moisture condenses on the cooled surface of the heat exchanger, chemically reacting with those present in the combustion products various acids, which is the cause of the so-called. low-temperature corrosion of steel units. Low temperature corrosion is most often prevented by maintaining more high temperatures coolant, which leads to significant operating costs. The use of a cast iron heat exchanger limits these processes in two ways: the massive cast iron heat exchanger does not cool down or heat up sharply due to inertia; Cast iron is more resistant to corrosion than steel.

Floor standing boiler Protherm Bear TLO reliable and stable in operation, easy to install and maintain, installed on the floor and has a drain combustion products into the chimney. The type range corresponds to the rated thermal power, (kW): 50 TLO - 44.5; 40 TLO - 35; 30 TLO - 27; 20 TLO - 18.

Equipment

The unit consists of the following parts: cast iron heat exchanger with insulation, frame, combustion product collector, gas part, lining with control unit. The cast iron heat exchanger consists of sections. Flue gases from the combustion chamber are transmitted thermal energy coolant flowing inside the sections. Sections are divided into side ("right" and "left") and middle (of the same type). The power of the heat exchanger depends on the number of sections in the heat exchanger. The heat exchanger is covered with thermal insulation to reduce heat loss and increase efficiency. The heat exchanger is equipped with a sleeve for installing a boiler sensor, emergency thermostat and pressure gauge. The bed is a welded frame that, in addition to the body, also holds external cladding(for sizes 40 and 50, the control panel holder is attached to the frame).

The burner device consists of a gas distribution section, burner pipes and automatic ignition and “gas path”. The “gas path” is formed by a section of the gas pipeline from the valve at the lower end to the entry into the combined gas fitting SIT NOVA 820 mV. The combined gas fittings regulate the gas supply to the boiler depending on the required power in heating mode or in DHW mode. The exit from it is already a section of the burner gas path, which ends with nozzles (one for each burner pipe). The main burner is turned on by the pilot burner. As a device for starting and controlling the operation of the device, a set of combined gas fittings is used, which contains a gas valve, a thermogenerator, thermogenerator wiring, an ignition burner, a gas supply pipe, a thermocouple, a piezo igniter, and an ignition electrode.

Dismantling and installation of the Protherm TLO boiler

Dismantling the cladding:

The front panel can be folded back by pulling the top edge towards you. The top panel, after unscrewing the two screws located at the back, folds up from the bottom.
- After this, the bolts attaching the side walls to the frame and to the support frame are loosened - the cladding is dismantled;
- Then the back panel is removed - in the same way as the side panels of the cladding;
- All parts of the cladding are set aside or leaned against the wall (carefully so as not to scratch the paint) and protected from falling.

After dismantling the cladding, the fully installed and insulated housing can be removed from the frame by loosening the anchor bolts. It is necessary to disconnect the thermostat and thermometer sensors from the heat exchanger sleeves. However, it should be noted that when manipulating in this way installed boiler, other supporting parts may be damaged, so these parts must be removed if necessary.

Removing the combustion products collector: the collector can be removed after loosening the holding bolts; at the same time, it is necessary to disconnect the exhaust gas thermostat from the combustion products collector.

Removing the burner: The burners can be dismantled after loosening the mounting bolts. Under no circumstances should you use the pipeline connections (water and gas) to carry the boiler.

Installation room regulator- Terminals for connecting the room regulator are accessible after removal top panel lining, loosening the bolts holding the control panel and opening the panel towards itself, while the panel remains connected to the terminal block and the housing by wires, measuring capillaries and a working thermostat.

The connections for the hydraulic connection of the Proterm Medved TLO 20, 30, 40, 50 floor-standing boiler are located on its rear side. The gas connection is also located on the rear side - between the hydraulic connecting pipes. The unit is installed on a building foundation, i.e. on the floor or stand. To facilitate its connection to the heating system in hard-to-reach places, it is possible to use flexible connecting pipes specially designed for such purposes. Flexible connecting pipes must have a minimum length and be protected from mechanical stress. If they are worn out, they must be replaced with new ones. All safety elements of the heating system
(safety valve, expansion tank) must be installed so that there is no connection between the boiler and the heating system and the safety elements of the heating system. shut-off valves(shut-off valves).

Ignition and shutdown

The control knob is in the "point" position - The ignition and main burners are turned off (the gas supply to them is blocked). Control knob in the “spark” position - In this position, the control knob of the gas fittings is kept pressed all the way, and at the same time the piezo ignition button is pressed (several times) until the pilot burner ignites. The control knob is kept pressed (10 seconds after ignition of the pilot burner) until the thermocouple heats up, then the control knob can be released (the gas supply to the main burner remains blocked).

Control knob in the "torch" position - The gas supply to the main burner is unblocked and the burner ignition is controlled automatically. The burner is ignited if operating voltage from the circuit is supplied to the closing electric valve of the SIT-NOVA fittings internal wiring apparatus. The control knob is in the “dot” position - The ignition and main burners will go out (if they are burning) - initial position. It is not possible to move the control knob to the "spark" position for 60 seconds after moving it to the "dot" position until the gas valve safety device is activated.

Adjusting gas fittings

Gas fittings adjustment elements: gas inlet; gas outlet; control handle; stub; fitting for measuring gas pressure at the inlet of gas fittings; fitting for measuring gas pressure at the outlet of the gas fittings; adjusting the gas supply to the ignition burner (“PILOT” screw); thermocouple connection.

The process of adjusting the gas pressure of the main burner: Unscrew the plug. When turning the adjusting screw clockwise, the outlet pressure increases. After measuring the gas pressure, check the measuring fittings of the gas fittings for leaks. After general settings Screw the plug all the way in.

Setting the gas supply to the pilot burner: The thermocouple must be in the pilot burner flame. The “PILOT” screw is used to adjust the flame. Flame adjustment is visual. When turning the “PILOT” screw clockwise, the gas flow to the ignition burner decreases and the size of the flame washing the thermocouple decreases. After completing the setup, it is necessary to check the tightness of the connections and the operation of the device. After adjustment, the screw must be sealed with a drop of paint.

Conversion to another type of fuel

Boiler readjustment floor-standing Proterm Bear TLO should be accomplished using propane conversion kits. If it is necessary to change the type of fuel (G 20 to G 30 and vice versa), readjustment is carried out in the following way: Remove the burner; Replace all burner nozzles with a different type (depending on the type of fuel). Reinstall the burner. Turn the gas valve adjusting screw to maximum. Check the connections of the gas fittings for leaks and accept the following measures safety: indicate on the boiler the type of fuel used.

For conversion to a different type of fuel, only original parts are used. When switching to another type of fuel, it is necessary to take into account the design requirements threaded connections gas fittings located inside the unit, i.e. seal them only with materials suitable for installation and resistant to this type of fuel. The results of setting all elements must be recorded.

The Protherm Bear gas boiler has the following type range: 20, 30, 40, 50 TLO.

The Proterm Bear TLO boiler is completely independent of an external source of electrical energy. It is designed to work in gravity heating systems (with natural circulation).

The use of a cast iron heat exchanger allows for stable and trouble-free operation of the boiler at partial load, i.e. when the device operates only with low coolant temperatures.

Full power is used only during a small part of the heating season, and the rest of the time the unit operates at partial heating load.

In this case, moisture condenses on the cooled surface of the heat exchanger, chemically reacting with various acids present in the combustion products, which causes the so-called. low-temperature corrosion of steel units.

Low-temperature corrosion is most often prevented by maintaining higher coolant temperatures, which leads to significant operating costs.

The use of a cast iron heat exchanger limits these processes in two ways:

The massive cast iron heat exchanger does not cool down or heat up sharply due to inertia;
- cast iron is more resistant to corrosion than steel.

The Protherm Bear TLO floor-standing boiler is reliable and stable in operation, easy to install and maintain, is installed on the floor and has combustion products discharged into the chimney.

The standard range corresponds to the rated thermal power, (kW):

50 TLO - 44.5
40 TLO - 35
30 TLO - 27
20 TLO - 18

Proterm TLO boiler equipment

The unit consists of the following parts:

Cast iron heat exchanger with insulation,
- beds,
- combustion product collector,
- gas part,
- facings with control unit.

The cast iron heat exchanger consists of sections. Flue gases from the combustion chamber transfer thermal energy to the coolant flowing inside the sections. Sections are divided into side ("right" and "left") and middle (of the same type).

The power of the heat exchanger depends on the number of sections in the heat exchanger.

The heat exchanger is covered with thermal insulation to reduce heat loss and increase efficiency.

The heat exchanger is equipped with a sleeve for installing a boiler sensor, emergency thermostat and pressure gauge.

The frame of the Protherm Bear gas boiler is a welded frame, which, in addition to the body, also holds the outer cladding (for sizes 40 and 50, the control panel holder is attached to the frame).

The burner device consists of a gas distribution section, burner pipes and automatic ignition and “gas path”. The “gas path” is formed by a section of the gas pipeline from the valve at the lower end to the entry into the combined gas fitting SIT - NOVA 820 mV

The combined gas fittings regulate the gas supply to the boiler depending on the required power in heating mode or in DHW mode. The exit from it is already a section of the burner gas path, which ends with nozzles (one for each burner pipe).

The main burner is turned on by the pilot burner. As a device for starting and controlling the operation of the device, a set of combined gas fittings is used, which contains a gas valve, a thermogenerator, thermogenerator wiring, an ignition burner, a gas supply pipe, a thermocouple, a piezo igniter, and an ignition electrode.

Dismantling and installation of the Proterm Medved boiler

Dismantling the cladding:

The front panel can be folded back by pulling the top edge towards you. The top panel, after unscrewing the two screws located at the back, folds up from the bottom.

After this, the bolts attaching the side walls to the frame and to the support frame are loosened - the cladding is dismantled;

Then the back panel is removed in the same way as the side panels;

All parts of the cladding are set aside or leaned against the wall (carefully so as not to scratch the paint) and protected from falling.

After dismantling the cladding, the fully installed and insulated boiler body can be removed from the frame by loosening the anchor bolts.

It is necessary to disconnect the thermostat and thermometer sensors from the heat exchanger sleeves.

However, it should be taken into account that when manipulating a boiler installed in this way, other supporting parts may be damaged, therefore, if necessary, these parts must be dismantled.

Removing the combustion products collector:

The manifold can be removed after loosening the holding bolts; at the same time, it is necessary to disconnect the exhaust gas thermostat from the combustion products manifold.

Burner removal:

The burners can be dismantled after loosening the mounting bolts.

Under no circumstances should you use the pipeline connections (water and gas) to carry the boiler.

Installation of a room regulator - The terminals for connecting the room regulator are accessible after removing the top panel of the boiler casing, loosening the bolts holding the control panel and opening the panel towards itself, while the panel remains connected to the terminal block and the housing by wires, meter capillaries and the operating thermostat.

The connections for the hydraulic connection of the Proterm Medved TLO 20, 30, 40, 50 floor-standing boiler are located on its rear side.

The gas connection is also located on the rear side - between the hydraulic connecting pipes.

The boiler is installed on a building foundation, i.e. on the floor or stand. To facilitate the connection of the boiler to the heating system in hard-to-reach places, it is possible to use flexible connecting pipes specially designed for such purposes.

Flexible connecting pipes must have a minimum length and be protected from mechanical stress. If they are worn out, they must be replaced with new ones.

All safety elements of the heating system (safety valve, expansion tank) must be installed so that there are no shut-off valves (shut-off valves) between the boiler and the heating system and the safety elements of the heating system.

Ignition and shutdown of the boiler Protherm TLO 20, 30, 40, 50

The control knob is in the "point" position - The ignition and main burners are turned off (the gas supply to them is blocked).

Control knob in the “spark” position - In this position, the control knob of the gas fittings is kept pressed all the way, and at the same time the piezo ignition button is pressed (several times) until the pilot burner ignites.

The control knob is kept pressed (10 seconds after ignition of the pilot burner) until the thermocouple heats up, then the control knob can be released (the gas supply to the main burner remains blocked).

Control knob in the “torch” position - The gas supply to the main burner is unblocked and the burner ignition is controlled automatically (the burner is ignited if the closing electric valve of the SIT-NOVA fittings is supplied with operating voltage from the internal wiring circuit of the device).

The control knob is in the “dot” position - The ignition and main burners will go out (if they are burning) - initial position.

It is not possible to move the control knob to the "spark" position for 60 seconds after moving it to the "dot" position until the gas valve safety device is activated.

Adjusting gas fittings

Gas fittings adjustment elements: gas inlet; gas outlet; control handle; stub; fitting for measuring gas pressure at the inlet of gas fittings; fitting for measuring gas pressure at the outlet of the gas fittings; adjusting the gas supply to the ignition burner (“PILOT” screw); thermocouple connection.

The process of setting the gas pressure of the main burner:

Unscrew the plug.
- When turning the adjusting screw clockwise, the outlet pressure increases.
- After measuring the gas pressure, check the measuring connections of the gas fittings for leaks.
- After general adjustments, screw the plug as far as it will go.

Setting the gas supply to the pilot burner

The thermocouple must be in the pilot burner flame. The “PILOT” screw is used to adjust the flame.
- Visual flame adjustment.
- When turning the “PILOT” screw clockwise, the gas flow to the ignition burner decreases and the size of the flame washing the thermocouple decreases.
- After completing the setup, it is necessary to check the tightness of the connections and the operation of the device.
- After adjustment, the screw must be sealed with a drop of paint.

Conversion to another type of fuel

Re-adjustment of the Proterm Medved TLO floor-standing boiler should be carried out using propane conversion kits.

If it is necessary to change the type of fuel (G 20 to G 30 and vice versa), readjustment of the boiler is carried out in the following way:

Remove the burner;
- Replace all burner nozzles with a different type (depending on the type of fuel).
- Reinstall the burner.
- Turn the gas valve adjusting screw to maximum.
- Check the connections of the gas fittings for leaks and take the following safety measures: indicate on the boiler the type of fuel used.

For conversion to a different type of fuel, only original parts are used.

When switching to a different type of fuel, it is necessary to take into account the requirements for the design of threaded connections of gas fittings located inside the unit, i.e. seal them only with materials suitable for installation and resistant to this type of fuel.

The results of setting all elements must be recorded.

Floor-standing gas boilers Proterm Medved TLO with open camera combustion and power range from 18 to 44.5 kW. These boilers non-volatile and are designed to work in heating systems with natural circulation. Coefficient useful action is 90%, the permitted temperature range is from +30°C to 85°C.

The undeniable advantage of the boiler is the presence of a draft breaker and a cast iron heat exchanger that will last for ten years.

Control system

• Traction sensor
• Flame control
• Thermal fuse

• Thermostatic regulator
• Safety valve
• Frost protection
• Pump jam protection

Bear TLO boilers are perfect in places where serious problems with electricity. If power outages are not your case, it’s better to take a closer look at the series.

Operating diagram of the Medved TLO boiler

Boiler connection diagram Bear TLO

Simple scheme connection of the Proterm Medved TLO boiler with natural circulation. This scheme completely energy independent. This option has many disadvantages such as poor circulation, slow start-up and larger diameter pipes are needed compared to a system with forced circulation.

Installation diagram Bear TLO and indirect heating boiler

Operation of the Bear TLO boiler on liquefied gas

Bear TLO boilers are capable of operating on gas from a cylinder - liquefied gas G30. To reconfigure the Medved boiler, you need to purchase an additional conversion kit
(article number - 0020109562 for 20TLO and 0020109563 for models 30TLO, 40TLO and 50TLO).

Without heating system no residential or office space. At the same time, the owner of each of these premises is faced with the task of installing a reliable and economical heating system, which is almost impossible without a high-quality boiler. And here Proterm boilers come to the rescue, having a lot of useful parameters.

Parameters of boilers of the Protherm Medved TLO series

The Protherm TLO series is designed for heating rooms measuring 150-450 square meters. m. It is important that such boilers are energy independent and can operate even during a power outage.

High-quality assembly and availability protective systems allow the equipment to be used for a long time without any repairs. If a breakdown does occur, the TeplovodService company will provide correct work your Proterm TLO as during the action warranty period, and after its completion. Of course, provided that this model You purchased the boiler from us.

Selecting a boiler model

You can choose a specific model of the Proterm Medved TLO boiler, knowing the area for which it is needed to heat. Typically, the number in the boiler model multiplied by 10 indicates the number square meters which it is capable of heating.

The Protherm Medved 20 TLO gas boiler is used for heating buildings not connected to electrical networks. It does not require external power supply, operating exclusively on gas fuel. Main features of the model:

• Open combustion chamber;
• Durable two-pass cast iron heat exchanger;
• Floor installation;
• Ease of operation;
• Increased security;
• Balanced price;
• Ability to work with boilers indirect heating;
• Work on natural or liquefied gas.

The boiler is easy to maintain and does not require frequent attention from users.

Detailed description of the model

The gas boiler Protherm Bear 20 TLO is a floor heating unit with a capacity of 18 kW. It is created according to a non-volatile design and is equipped with an open combustion chamber. It requires a traditional chimney to operate. Conservation of thermal energy is ensured by the use of effective thermal insulation located inside the boiler.

The basis of the gas boiler Protherm Bear 20 TLO is a cast iron heat exchanger. It is resistant to corrosion and can withstand severe temperature overloads. On board is provided additional protection from corrosion resulting from temperature changes. The two-pass cast iron heat exchangers used consist of three sections and ensure efficient heat transfer to the coolant.

The gas boiler Protherm Bear 20 TLO is designed for floor installation. Its weight is 92 kg; pipes with a diameter of 1 ½ inches are used for connection to the heating circuit. For the preparation of hot water External connected indirect heating boilers of any brand are used (including those from Protherm). The maximum heated area is 180 square meters. m, the temperature in the heating circuit varies from +30 to +85 degrees at a pressure of up to three atmospheres.

The equipment does not need to be connected to the mains, generating power for its own needs using an igniter. It is equipped with safety systems that monitor the temperature of the coolant and the presence of draft in the chimney. It is possible to operate on liquefied gas - in this case, reconfiguration of the equipment is required.

The use of a cast iron heat exchanger leaves a certain imprint on the cost of the Protherm Bear 20 TLO gas boiler. But, thanks to the optimal pricing policy, the final price remains affordable even for the thrifty consumer. You can buy a floor-standing gas boiler Protherm Bear 20 TLO in the Teplodvor online store. Together with heating equipment We will offer you auxiliary products and accessories for the installation of heating systems.

The technical characteristics correspond to those of boilers of the PLO modification. When installing circulation pump And expansion tank The boiler works great closed system heating.