The gas water heater NEVA 3208 is convenient, simple and reliable. Despite the venerable age of most of the operated specimens, they quite regularly cope with their duties of heating water. But sometimes you want to clarify something in the instruction manual. And here comes the problem.
The original instructions are most often lost, and downloading the operating instructions on the Internet is Neva-3208 impossible. More modern columns Neva series 4000, 5000, Neva Lux 6000, boilers Neva Lux series 8000 - please, but there are no instructions for Neva 3208.
In the search, only fraudulent sites that require a cell phone number come across, but even there there is no instruction - only the name of the file. This is easy to check by trying to find a file on such a site with a name that obviously does not exist - for example, " qwerrasdfgfgh-$%#$@$". He will find it, and even say that it has been downloaded several thousand times! I hope that you do not fall for such tricks and do not enter your phone number on suspicious sites. And you can find the instruction manual for the gas column Neva-3208 here.
DEVICE WATER HEATING FLOW GAS HOUSEHOLD
NEVA-3208 GOST 19910-94
NEVA-3208-02 GOST 19910-94
OPERATION MANUAL 3208-00.000-02 RE
Dear buyer!
When purchasing the device, check the completeness and marketable condition device, and also require the sales organization to fill out coupons for warranty repairs
Before installing and operating the machine, you must carefully read the rules and requirements set forth in this instruction manual, compliance with which will ensure long-term trouble-free and safe work water heater.
Improper installation and operation may result in an accident or damage the machine.
1. GENERAL INSTRUCTIONS
1.1. Apparatus flow-through gas water heating household "NEVA-3208" (NEVA-3208-02) VPG-18-223-B11-R2 GOST 19910-94, hereinafter referred to as the "apparatus", is designed to heat water used for sanitary purposes (washing dishes , washing, bathing) in apartments, cottages, country houses.
1.2. The device is designed to operate on natural gas in accordance with GOST 5542-87 with a net calorific value of 35570+/-1780 kJ/m3 (8500+/-425 kcal/m3) or liquefied gas in accordance with GOST 20448-90 with a lower calorific value of 96250+/- 4810 kJ/m3 (23000+/-1150 kcal/m3).
When manufactured at the factory, the apparatus is configured for a specific type of gas, which is indicated on the label on the apparatus and in the “Certificate of Acceptance” section of this manual.
1.3. Installation, assembly, owner briefing, preventive maintenance, troubleshooting and repairs are carried out by gas operating organizations or other organizations licensed to this species activities. Section 13 must contain the mark and stamp of the organization that installed the apparatus.
1.4. Checking and cleaning the chimney, repairing and monitoring the water supply system are carried out by the owner of the device or the building management.
1.5. Responsibility for safe operation the device and for its maintenance in proper condition is the responsibility of its owner.
2. TECHNICAL DATA
2.1. Rated heat output 23.2 kW
2.2. Rated heat output 18.0 kW
2.3. Rated heat output of the pilot burner, not more than 0.35 kW
2.4 Nominal natural gas pressure 1274 Pa (130 mm w.c.)
2.5 Nominal pressure liquefied gas 2940 Pa (300 mm w.c.)
2.6. Nominal consumption of natural gas 2.35 cubic meters. m/hour.
2.6. Nominal consumption of liquefied gas 0.87 cubic meters. m/hour.
2.7. Efficiency not less than 80%
2.8. Supply water pressure for normal operation of the device 50 ... 600 kPa
2.9. Water consumption when heated by 40 degrees (at rated power) 6.45 l / min
2.10. The temperature of the gas combustion products is not less than 110 degrees
2.11. Vacuum in the chimney not less than 2.0 Pa (0.2 mm w.c.), not more than 30.0 Pa (3.0 mm w.c.)
2.12. Ignition of the device "NEVA-3208" piezoelectric, device "NEVA-3208-02" - with a match
2.13. dimensions apparatus: height 680 mm, depth 278 mm, width 390 mm
2.14. The weight of the device is not more than 20 kg
3. SCOPE OF DELIVERY
3208-00.000 Apparatus "Neva-3208", or "NEVA-3208-02" 1 pc.
3208-00.000-02 RE Operating manual 1 copy.
3208-06.300 Package 1 pc.
3208-00.001 Handle 1 pc.
Wall fixing elements 1 set
3103-00.014 Gasket 4 pcs.
3204-00.013 Sleeve 1 pc.
4. SAFETY INSTRUCTIONS
4.1. The room where the device is installed must be constantly ventilated.
4.2. To avoid fire, do not place or hang flammable substances or materials on or near the device.
4.3. After stopping the operation of the device, it is necessary to disconnect it from the gas supply source.
4.4. To prevent the unit from defrosting during winter time(when installed in unheated rooms) it is necessary to drain the water from it.
4.5. In order to avoid accidents and damage to the device, consumers are PROHIBITED:
a) independently install and start the device into operation;
b) allow children to use the device, as well as persons who are not familiar with this instruction manual;
c) operate the device on a gas that does not correspond to that specified in the plate on the device and the "Acceptance Certificate" of this manual;
d) close the grate or gap in the lower part of the door or wall, intended for the inflow of air necessary for the combustion of gas;
e) use the device in the absence of draft in the chimney;
e) use a faulty device;
g) independently disassemble and repair the device;
h) make changes to the design of the device;
i) leave the working device unattended.
4.6. During normal operation of the apparatus and with a serviceable gas pipeline, the smell of gas should not be felt in the room.
If you smell gas in the room, you MUST:
a) immediately turn off the device;
b) close the gas valve located on the gas pipeline in front of the apparatus;
c) thoroughly ventilate the room;
d) call immediately emergency service gas facilities, tel. 04.
Until the gas leak is eliminated, do not perform any work related to sparking: do not light a fire, do not turn on or off electrical appliances and electric lighting, do not smoke.
4.7. If abnormal operation of the device is detected, it is necessary to contact the gas management service and, until the malfunctions are eliminated, do not use the device.
4.8. Explosion or carbon monoxide poisoning or gas or carbon monoxide poisoning ( carbon monoxide) located in the products of incomplete combustion of gas.
The first signs of poisoning are: heaviness in the head, palpitations, tinnitus, dizziness, general weakness, then nausea, vomiting, shortness of breath, impaired motor functions may appear. The victim may suddenly lose consciousness.
To provide first aid, it is necessary to: take the victim to fresh air, unfasten clothing that restricts breathing, give ammonia a sniff, cover it warmly, but do not let it fall asleep and call a doctor.
If there is no breathing, immediately remove the victim to warm room with fresh air and perform artificial respiration, without stopping it until the doctor arrives.
5. DEVICE AND OPERATION OF THE DEVICE
5.1. Device device
5.1.1. The apparatus (Fig. 1) of the wall type has rectangular shape formed by a removable lining 7.
5.1.2. All main elements of the device are mounted on a frame. On the front side of the cladding are: handle 2 for controlling the gas valve, button 3 for turning on the solenoid valve, viewing window 8 for observing the flame of the pilot and main burners.
5.1.3. The apparatus (Fig. 2) consists of a combustion chamber 1 (which includes a frame 3, a gas exhaust device 4 and a heat exchanger 2), a water-gas burner unit 5 (consisting of a main burner 6, an ignition burner 7, a gas cock 9, a water regulator 10, a valve electromagnetic 11) and tube 8, designed to turn off the water heater in the absence of draft in the chimney.
NOTE: Due to the fact that OAO continues to work on further improving the design of the apparatus, the purchased apparatus may not fully match in individual elements with a description or picture in the "Operating Instructions".
5.2. Description of the device
5.2.1. Gas through pipe 4 (Fig. 1) enters solenoid valve 11 (fig. 2), the button 3 (fig. 1) of which is located to the right of the gas cock turn-on handle.
5.2.2. When the solenoid valve button is pressed and open” (to the “Ignition” position) (Fig. 3), the tap gas flows to the pilot burner. The thermocouple, heated by the flame of the pilot burner, transmits the EMF to the valve solenoid, which automatically holds the valve disc open and provides gas access to the gas cock.
5.2.3. When turning handle 2 (Fig. 1) clockwise, the gas valve 9 (Fig. 2) performs the sequence of switching on the pilot burner to the “Ignition” position (see Fig. 3), gas supply to the main burner in the “Apparatus on” position ( see Fig. 3) and regulates the amount of gas supplied to the main burner within the "High flame" - "Small flame" positions (see Fig. 3) to obtain the desired water temperature. In this case, the main burner lights up only when water flows through the device (when the tap is opened hot water).
5.2.4 Turning off the apparatus is done by turning the control knob counterclockwise to the stop, while the main and pilot burners are instantly extinguished. The electromagnetic plug valve will remain open until the thermocouple cools down (10...15 s).
5.2.5. To ensure smooth ignition of the main burner, the water regulator is provided with an ignition retarder, which acts as a throttle when water flows out of the supra-membrane cavity and slows down the upward movement of the membrane, and, consequently, the ignition speed of the main burner.
The device is equipped with safety devices that provide:
- gas access to the main burner only in the presence of a pilot flame and water flow
- shutting off the gas valve to the main burner in case the pilot burner goes out or the water flow stops,
- shutdown of the main and pilot burners in the absence of draft in the chimney.
1 - branch pipe, 2 - handle; 3 - button: 4 - gas supply pipe; 5 - hot water outlet pipe, 6 - inlet pipe cold water; 7 - facing, 8 - viewing window
Figure 1. Apparatus water-heating flowing gas household
1 - combustion chamber; 2 - heat exchanger; 3 - frame; 4 - gas outlet device; 5 - water gas burner block; 6 - main burner; 7 - ignition burner; 8 - thrust sensor tube; 9 - gas tap: 10 - water regulator; 11 - electromagnetic valve; 12 - thermocouple; 13 - piezo ignition (NEVA-3208); 14 - plate.
Figure 2. Apparatus water-heating flowing gas household (without cladding)
Figure 3. Positions of the gas cock control knob
6. INSTALLATION PROCEDURE
6.1. Installing the Machine
6.1.1. The device must be installed in kitchens or other non-residential premises in accordance with the Gasification Project and SNiP 2.04.08.87
6.1.2. Installation and installation of the apparatus must be carried out by the operating organization of the gas facilities or other organizations licensed for this type of activity
6.1.3. The device is hung with holes (on the frame) on a special bracket mounted on the wall. Mounting holes of the apparatus are shown in Figure 4. It is recommended to install the apparatus in such a way that viewing window 8 (see Fig. 1) is at the level of the user's eyes.
6.1.4. Mounting dimensions pipelines for gas supply, water supply and discharge, removal of combustion products through a chimney are shown in Figure 1
6.2. Water and gas connection
6.2.1 Connection should be made with pipes with DN 15 mm. When installing pipelines, it is recommended that you first connect to the water supply and discharge points, fill the heat exchanger and water system water and only then connect to the place of gas supply. Connection should not be accompanied by mutual tension of pipes and parts of the apparatus in order to avoid displacement or breakage of individual parts and parts of the apparatus and violation of the tightness of gas and water systems.
6.2.2. After installing the apparatus, the places of its connections with communications must be checked for tightness. The tightness of the water inlet and outlet connections is checked by opening the shut-off valve (see Fig. 4) of cold water (with closed water taps). Leakage at the joints is not allowed.
Check the tightness of the gas supply connection by opening a common valve on the gas pipeline with the handle of the device in the closed position (position "Apparatus off"). The check is carried out by washing the joints or using special devices. Gas leakage is not allowed.
6.3. Installing a chimney to remove combustion products
For the apparatus, a system is necessarily provided for the removal of combustion products, going from the apparatus outside the building. Flue pipes must meet the following requirements:
- must be sealed and made of non-combustible and corrosion-resistant materials, such as: stainless steel, galvanized steel, enameled steel, aluminum, copper with a wall thickness of at least 0.5 mm;
- length connecting pipe should not be more than 3 m, there should not be more than three turns on the pipe, the slope of the horizontal section of the pipe should be at least 0.01 towards the water heater;
- the height of the vertical part of the pipe (from the water heater to the axis of the horizontal section) must be at least three diameters;
- The internal diameter of the flue pipes must be at least 125 mm.
6.3.3. The connection between the device and the flue pipe must be airtight. It is recommended to install the pipe according to the diagram in Figure 5.
6.4. After installation, installation and leak testing, the operation of the safety automation must be checked (clauses 5.2.5 and 5.2.6.).
Figure 4. Installation diagram of the device
1 - smoke pipe; 2 - branch pipe; 3 - heat-resistant seal
Figure 5. Scheme of connecting the flue pipe
7. ORDER OF WORK
7.1. Turning on the machine
7.1.1. To turn on the device, it is necessary (see Fig. 4)
a) open the common valve on the gas pipeline in front of the apparatus;
b) open shut-off valve cold water (in front of the apparatus);
c) set the handle of the device to the "Ignition" position (see Fig. 3),
d) press the button of the solenoid valve 3 (see Fig. 1) and repeatedly press the piezo ignition button 13 (see Fig. 2) (or bring a lighted match to the pilot burner) until the flame appears on the pilot burner;
e) release the button of the solenoid valve after turning it on (after no more than 60 s), while the flame of the pilot burner should not go out.
WARNING: to avoid burns, do not bring your eyes too close to the viewing window.
At the first ignition or after a long period of non-use of the device, in order to remove air from the gas communications, repeat the indicated operations listed d and e.
f) open the gas cock to the main burner, to do this, turn the gas cock handle to the right until it stops ("Big flame" position). In this case, the pilot burner continues to burn, but the main burner is not yet ignited.
g) open the tap, and the main burner should ignite. The degree of water heating is adjusted by turning the handle of the apparatus within the "Big flame" - "Small flame" positions or by changing the flow rate of water passing through the apparatus.
7.2. Turning off the machine
7.2.1. At the end of use, turn off the device, observing the following sequence:
a) close the water taps (see Fig. 4);
b) turn knob 2 (see Fig. 1) to the "Appliance off" position (counterclockwise to the stop);
c) close the general valve on the gas pipeline;
d) close the cold water shut-off valve.
8. MAINTENANCE
8.1. To ensure long-term trouble-free operation and maintain the performance of the machine, regular care, inspection and maintenance is required. Maintenance and inspection are the responsibility of the owner of the machine.
Maintenance is carried out at least once a year by specialists from the gas facilities or other organizations licensed for this type of activity.
8.2.1. The apparatus should be kept clean, for which it is necessary to regularly remove dust from the upper surface of the apparatus, and also to wipe the lining first with a damp and then with a dry cloth. In case of significant contamination, first wipe the lining with a wet cloth moistened with neutral detergent, and then with a dry cloth.
8.2.2. It is forbidden to use detergents of the strengthened action and containing abrasive particles, gasoline or other organic solvents for cleaning of a surface of facing and plastic details.
8.3. Inspection
Before switching on the device, you must:
a) check the absence of combustible objects near the device;
b) check for gas leakage (by characteristic smell) and water leakage (visually);
c) check the serviceability of the burners according to the combustion pattern:
the flame of the pilot burner should be elongated, not smoky and reach the main burner (flame deviation sharply upwards indicates clogging of the air supply channels to the burner);
The flame of the main burner should be blue, even and not have yellow smoky tongues indicating contamination of the outer surfaces of the nozzles and inlets of the burner sections.
In case of detection of gas and water leaks, as well as malfunction of the burners, it is necessary to carry out repairs and maintenance of the device.
8.4. Maintenance
8.4.1. During maintenance, the following work is performed:
- cleaning and flushing the heat exchanger from scale inside the pipes and from soot outside;
- cleaning and washing of water and gas filters;
- cleaning and flushing of the main and pilot burners;
- cleaning and lubricating the conical surface of the plug and the gas valve opening;
- cleaning and lubrication of seals and rods of water and gas blocks;
- checking the tightness of the gas and water systems of the apparatus;
- checking the operation of the safety automation, including the draft sensor, for which it is necessary to remove the chimney (see Fig. 1), turn on the device and, with the gas cock fully open and the maximum water flow, close the pipe of the device sheet metal. After 10 ... 60 seconds, the device should turn off. After checking, install the flue pipe according to figure 5.
Work related to maintenance are not warranted by the manufacturer.
9. POSSIBLE FAULTS OF THE NEVA 3208 DEVICE AND METHODS FOR THEIR ELIMINATION
Fault name | Probable Cause | Elimination Methods |
The igniter is difficult to ignite or does not ignite at all | The presence of air in gas communications. | See section 7.1 Turning on the machine |
Clogged igniter nozzle | ||
Replace LPG bottle |
||
When the solenoid valve button is released (after a control time of 60 s), the igniter goes out. | Ignition burner flame fails to heat thermocouple | Call the gas service |
Broken electrical circuit thermocouple - solenoid valve | Check the contact of the thermocouple with the solenoid valve (clean the contacts if necessary) Check the tightness of the connection of the thermocouple with the solenoid valve, while remembering: the tightening torque must ensure reliable contact, but should not exceed 1.5 N.m (0.15 kg.m) in order to avoid damage to these units. |
|
The electromagnetic plug or thermocouple is out of order | Call the gas service |
|
The main burner does not ignite or is difficult to ignite when the hot water tap is opened. | Insufficient opening of the gas cock on the device or the general cock on the gas pipeline | Turn the handle of the device to the “Big flame” position and open the common valve on the gas pipeline completely |
Low gas pressure | Call the gas service |
|
Low tap water pressure | Temporarily not using the device |
|
Clogged water filter, torn membrane or broken water block plate | Call the gas service |
|
The main burner does not go out when the hot water tap is closed | Jamming of the stem of the gas or water block | Call the gas service |
The flame of the main burner is sluggish, elongated, with yellow smoky tongues | Dust deposits on the nozzles and internal surfaces of the main burner | Call the gas service |
After a short period of operation, the device turns off spontaneously. | No draft in the chimney | Clean the chimney. |
The supply of liquefied gas in the cylinder has run out | Replace LPG bottle. |
|
The faucet plug handle turns with considerable effort | Lubricant drying out | Call the gas service |
Ingress of contaminants | Call the gas service |
|
Low water flow at the outlet of the apparatus with normal water pressure in the pipeline | Presence of scale in the heat exchanger or in the hot water outlet pipe | Call the gas service |
Insufficient water heating | Large water consumption | |
Soot deposits on the heat exchanger fins or scale in the heat exchanger tubes | Call the gas service |
|
During operation of the device, there is increased noise from flowing water. | Large water consumption | Adjust the water flow to 6.45 l/min. |
Misaligned gaskets in the water block connection | Correct misalignment or replace gaskets. |
|
The main burner ignites with a "pop" and the ejection of the flame from the casing window | The ignition burner flame is small or deviates sharply upwards and does not reach the main burner (the nozzle is clogged or the air supply channel to the igniter is clogged with dust, the groove on the valve plug is partially clogged with grease, low gas pressure) | Call the gas service |
Ignition retarder not working | Call the gas service |
|
The igniter does not ignite from the piezo ignition (it ignites normally from a match) | No spark between spark plug and igniter | Check the connection of the wires of the piezoelectric generator to the candle and to the body of the device. |
Weak spark between spark plug and igniter | Set a gap of 5 mm between the spark plug electrode and the igniter. |
10. STORAGE RULES
10.1. The device must be stored and transported only in the position indicated on the handling signs.
10.2. The device must be stored in a closed room that guarantees protection against atmospheric and other harmful effects at air temperature from -50°С to +40°С and relative humidity no more than 98%.
10.3. When storing the apparatus for more than 12 months, the latter must be subjected to conservation in accordance with GOST 9.014
10.4. The openings of the inlet and outlet pipes must be closed with plugs or plugs.
10.5. Every 6 months of storage, the device must be technical inspection, at which the absence of moisture ingress and dust clogging of the units and parts of the apparatus is checked.
10.6. Apparatus should be stacked in no more than five tiers when stacked and transported.
11. ACCEPTANCE CERTIFICATE
The device is water-heating flowing gas household. NEVA - 3208 complies with GOST 19910-94 and is recognized as serviceable
12. WARRANTY
The manufacturer guarantees trouble-free operation of the device if the project documentation for the installation of the device is available and if the consumer observes the rules for storage, installation and operation established by this "Operation Manual".
Warranty period of operation of the device is 3 years from the date of sale through retail trading network; 3 years from the date of receipt by the consumer (for off-market consumption);
12.3. Warranty repair The device is produced by gas facilities, the manufacturer or other organizations licensed for this type of activity.
12.4. Average term service of the device not less than 12 years.
12.5. When purchasing the device, the buyer must receive the "Operation Manual" with the store's mark on the purchase and check for the presence of tear-off coupons for warranty repairs.
12.6. In the absence of a store stamp in the warranty cards with a mark of the date of sale of the device guarantee period calculated from the date of its release by the manufacturer.
12.7. When repairing the device, the warranty card and the spine to it are filled in by an employee of the gas industry or an organization licensed for this type of activity. The warranty card is withdrawn by an employee of the gas industry or an organization licensed for this type of activity. The spine of the warranty card remains in the instruction manual.
12.8. The manufacturer is not responsible for the malfunction of the device and does not guarantee its operation if the Consumer's claim is presented with evidence of:
a) non-compliance with the rules of installation and operation;
b) non-compliance with the rules of transportation and storage by the Consumer, trading and transport organizations;
Evidence can be presented both in the form of an opinion of an independent Expert, and in the form of an act drawn up by a representative of the Manufacturer and signed by the Consumer.
To heat water used for domestic purposes and in water heating systems, various water heaters are used: HSV-18-A, AGV-80 and AGV-120.
A flowing gas water heater VPG-18-A, designed for continuous heating of running water, can be used for multi-point water intake. The water heater works on natural and liquefied gases.
The VPG-18-A water heater is made in the form of a parallelepiped, the outer surfaces of which are covered with white enamel. The main elements of the device are the main and pilot burner, heat exchanger, gas burner block, electromagnetic valve, thermoelectric thermometer, draft transducer and piezoelectric ignition device. All elements of the device are mounted in a detachable casing, thanks to which you can freely inspect and repair its elements without removing the device from the wall.
On the front wall of the apparatus there is a gas valve control knob, buttons for turning on the electromagnetic valve and a piezoelectric ignition device. In the upper part of the apparatus, a device is provided for the removal of combustion products into the chimney, in the lower part there are branch pipes for connection to the water supply system and the gas pipeline. Automatic devices ensure that the gas supply to the main burner is cut off if water does not flow to the apparatus, if there is no draft in the chimney and if the pilot burner flame goes out.
Technical characteristics of the water heater VPG-18-A
VPG-18-A water heaters are installed in kitchens or bathrooms and fastened with hooks or screws screwed into dowels embedded in a fireproof wall. If the water heater is mounted on a wooden plastered wall, then a sheet of roofing steel on asbestos 3 mm thick is nailed to it behind the water heater.
Gas water heaters are installed at a distance of 970-1200 mm from the bottom of the case to the floor. Water heaters are connected to the chimney with pipes made of roofing steel. The pipe diameter must be at least the diameter of the socket on the flue gas outlet. The length of the vertical section of pipes above the draft breaker should be at least 0.5 m, and the horizontal section should not exceed 3 m in new houses and 6 m in previously built ones. The slope of the pipes is 0.01 towards the water heater.
The pipes are tightly pushed one into the other along the gas flow by at least 0.5D) (where D is the diameter of the pipe) and they must have no more than three turns with a radius of curvature of at least D. At a distance of 10 cm from the end of the pipe, a washer is installed that abuts into the wall.
The water heater is mounted as follows: they mark the installation site, mark and punch holes for the dowels, which are embedded in the wall. Then they wrap it in dowels, screws, hang the water heater and attach it to the gas and water connections.
Automatic gas water heaters of the AGV type are capacitive water heaters used for hot water supply systems and providing multi-point water intake. Such water heaters are installed in bathrooms, kitchens or rooms with a volume of at least 6 m 3 with a mandatory connection to a separate gas duct. Automatic gas water heaters AGV-80 and AGV-120 consist of the following main elements: a galvanized welded tank, a combustion chamber with a burner, a thermostat, a magnetic gas valve, an ignition burner, a thermoelectric thermometer, a safety valve and a draft interrupter.
The casing 1 of the AVG-80 water heater (Fig. 244) is a cylinder made of 1 mm thick sheet steel and painted with enamel paint. Between the walls of the tank and the casing there is a thermal insulation of 2 ¦ - a layer of slag wool.
Rice. 244. Automatic gas water heater AGV-80:
1 - casing, 2 - thermal insulation, 3 - water tank, 4 - cold water pipeline. 5 - flame tube, 6 - gas flow extension, 7 - drain fitting, 8 - thin, 9 - gas burner, 10 - air supply regulator, 11 - firebox door, 12 - thermocouple, 13 - temperature controller sensing element, 14 - tube igniter, 15 - thermocouple tube, 16 - burner tube, 17 - temperature control valve, 18 - button, 19 - solenoid valve, 20 - gas cock, 21 - plug valve, 22 - gas pipeline, 23 - hot water pipe, 24 - draft breaker
Tank-cylinder with upper and lower bottoms is made of 3 mm thick galvanized steel. In the upper bottom there are two fittings with a diameter of 20 mm, one of them is used to connect pipelines 4 of cold water, the other 23 is for hot water extraction.
Water is drained from the water heater through fitting 7.
A flame tube 5 with a diameter of 80 mm is located along the axis of the tank, through which hot gases pass from the combustion chamber and heat the water. To increase heat transfer, an extension 6 of the gas flow is placed inside the flame tube. A draft breaker 24 is put on top of the pipe. 8 in the firebox 8 of the water heater there is a low-pressure gas burner 9 of the injection type. On the gas pipeline 22, as well as in front of the burner and igniter, plug 21 and gas 20 valves are installed. To maintain a constant water temperature, a sensitive element 13 of the thermostat is installed in the middle part of the water heater tank.
The gas enters the burner through the solenoid valve 19, which is activated when the button 18 is pressed, and the thermostat valve 17. Near the tube 14 of the igniter, there is a tube 15 of a thermoelectric thermometer and a thermoelectric thermometer 12 with a bimetallic plate that regulates the passage of gas to the burner.
The water heater tank is constantly under pressure from the water supply. The ignition field of the burner is warm from its flame and hot gases passing through the flame tube heat the water.
When the water in the tank is heated to a predetermined temperature, the brass tube of the sensitive element of the regulator lengthens and pulls the rod of the regulator lever connected to it. The regulator levers are moved by the lever spring to another position and release the regulator valve. The valve closes under the action of its spring and the passage of gas through the regulator to the burner stops. The flame in the burner goes out, but it burns in the igniter, as gas is supplied to it through the solenoid valve.
When the water in the tank cools below the set temperature, the regulator tube, cooling down, shortens and presses the rod on the regulator lever. The levers of the regulator are moved by a lever spring to their original position and open the regulator valve. The gas flows through the solenoid valve and the regulator valve to the burner and is ignited by the igniter. If the igniter goes out, the thermoelectric thermometer cools down, the electric current in the circuit disappears, the solenoid valve closes and stops the gas supply to the burner and igniter. To regulate the amount of air supplied to the burner 9 is the regulator 10 of the air supply.
The device is also equipped with automatic control of draft and flame, with the help of which the gas supply is stopped in the absence of draft from the chimney or the flame of the pilot burner goes out.
Technical characteristics of water heaters AGV
When installing apartment heating and hot water supply from the AGV-80 water heater (Fig. 245), the cold water pipeline is connected to the water heater through the lower drain fitting. On the water supply line they put check valve and a valve and arrange a branch with a valve to drain water from the system. Hot water through the top fitting and the riser is sent to the expansion vessel, from which the top hot line of the heating system is laid. The hot riser is insulated. To increase the circulation pressure, it is recommended to install radiators at a height of 30-35 cm from the bottom of the appliance to the floor.
Rice. 245. Scheme of apartment heating and hot water supply from gas water heater AGV-80:
1 - pipe to the chimney, 2 - safety line from the valve, 3 - pipeline to the heating system, 4 - pipeline from the heating system
The return line is connected to the lower drain fitting after the check valve. A drain pipe runs from the expansion vessel to the sink. A safety valve is installed on the hot riser, from which a pipe is laid to the washbasin or sink. Hot water is supplied to sanitary appliances, as shown in the figure. For ease of ignition of the igniter and maintenance of the water heater, it is installed on a stand. When installing the water heater on a wooden floor, a steel sheet on asbestos cardboard should be placed under it.
For heating individual rooms with an area of 30 to 150 m 2, heating devices are used, respectively, AOG-5, AOGV-20, operating on natural and liquefied gas. The devices are made in the form of a rectangular pedestal (Fig. 246), the front surfaces of which are covered with white silicate enamel. The main elements of the apparatus are a combustion chamber, a heat exchanger, burners (one or two), automatic device combustion safety, which provides control of the presence of a flame on the pilot burner and draft in the chimney and an automatic device for controlling the temperature of water heating, which maintains its heating temperature within the specified limits and, when the maximum is reached, turns off the gas supply to the main burner.
Rice. 246. Heating apparatus
Technical characteristics of heating devices
Overview of the gas column Neva 4511 VPG-18
household geyser Neva 4511, 4513 (VPG-18 water heater) is designed to provide hot water apartments, country houses. It is a compact model with a digital display, reliable and easy to maintain, equipped with complete set security systems.
Designation of the water heater VPG-18-223-V11-UHL 4.2, where:
IN - water heating apparatus,
P - flowing;
G - gas;
18 - nominal heat output, kW;
223 - the device runs on natural and liquefied gases;
B11 - removal of combustion products through the chimney;
UHL 4.2 - climatic version.
Advantages of the gas column Neva 4511, 4513
It is intended for fast heating of water;
Operates at low water pressure (0.10 bar)
Automatic electronic ignition;
Compact overall dimensions;
Compact 2-tier heat exchanger;
Water-cooled combustion chamber;
Modern security systems;
Built-in temperature indicator;
1-2 tapping points;
Technical characteristics of the geyser Neva 4511
Common parameters
Rated thermal power, kW - 21
Productivity, l/min - 11
Gas pressure (natural / liquefied) - 1.3 / 2.9 kPa
Nominal gas consumption (natural/liquefied), m3/hour - 2.2/0.8
Minimum water pressure - 30 kPa
Maximum water pressure, kPa - 1000
Type of communication supply - Lower
Inlet pipe diameter, mm - 19.17
Chimney diameter, mm - 122.6
Water heater control functions VPG-18
Management - Mechanical
Functions - Flame adjustment, Water flow adjustment, Auto ignition
Indication - Display
Indicators - Temperature indication
Operating parameters
Rated heat output - 18 kW.
Efficiency - not less than 84%.
Gas group - 2nd; H / 3rd; B/P.
Mass flow rate of combustion products of natural / liquefied gas at rated thermal power - 7.4 / 8.0 g / s.
Type of ignition of the device - electronic.
Device dimensions, Dimensions (WxHxD), mm - 290 x 565 x 221 mm
Weight, kg - 10
Geyser Neva 4511, 4513 wall type (see Fig. 1) has a rectangular shape formed by a removable lining 4.
On the front side of the cladding are: water flow adjustment knob 1, gas flow adjustment knob 2, water temperature display 3 and viewing window 5 for observing the burner flame. All main elements are mounted on the rear wall 22 (see Fig. 2).
Picture 1. Appearance and dimensions of the gas column Neva 4511, 4513
1 - water flow adjustment knob; 2 - gas flow adjustment knob; 3 – water temperature display; 4 - lining; 5 - viewing window; 6 - cold water inlet, thread G 1/2; 7 - gas supply fitting, thread G 1/2; 8 - hot water outlet, thread G 1/2; 9 - branch pipe of the gas outlet device; 10 - mounting holes.
Figure 2. View of the gas column Neva 4511, 4513 without a casing
1 - water flow regulator; 2 – gas flow regulator; 3 - plate; 4 - water-gas unit; 5 - burner; 6 - fitting for supplying cold water; 7 - gas supply fitting; 8 - hot water outlet; 9 - gas outlet device; 10 - candle; 11 – flame presence sensor; 12 - heat exchanger; 13 - valve
electromagnetic; 14 - battery compartment; 15 - electronic control unit; 16 - thermal relay (traction sensor); 17 – microswitch (water flow sensor); 18 – water temperature sensor; 19 - thermal relay (water overheating sensor); 20 - plug for draining water; 21 - fitting for measuring gas pressure; 22 - rear wall; 23 - screws for fastening the cladding.
The purpose of the main nodes and constituent parts geyser Neva 4511, 4513
The water-gas unit 4 is designed to control the gas supply to the burner, adjust the water flow and consists of water and gas units (the design of the unit provides gas access to the burner only if there is a water flow);
Burner 5 is designed to create and supply an air-gas mixture to the place of combustion;
The exhaust device 9 is designed to remove combustion products into the chimney;
Candle 10 is designed to create a spark discharge to ignite the burner;
The flame presence sensor 11 provides control of the burner;
The heat exchanger 12 ensures the transfer of the heat obtained by burning the gas to the water flowing through its pipes;
Thermal relay 16 (draft sensor) is designed to turn off the device in the absence of draft in the chimney;
The water temperature sensor 18 is designed to determine the water temperature at the outlet of the apparatus;
Thermal relay 19 (water overheating sensor) is designed to turn off the gas column Neva 4511, 4513 when the water is heated above 90 ° C;
Plug 20 is used to drain water from the water circuit of the device to prevent it from freezing; the safety valve built into the plug is designed to protect the water circuit of the water heater from high blood pressure water.
The working diagram of the water heater VPG-18 is shown in Figure 3.
When water begins to flow through the water unit 22 (see Fig. 3) with a flow rate of at least 2.5 l / min, the gas valve 30 opens with the membrane rod 25 and the contacts of the microswitch 17 close, after which the control unit 15 opens the solenoid valve 13 and begins to flow high voltage current pulses to spark plug 10.
Burner 5 is ignited by spark discharges between the spark plug electrode and the nozzle of the burner section. Further, the burner operation is controlled by the flame presence sensor 11.
The water flow regulator 1 regulates the amount and water temperature coming out of the machine: turning the knob counterclockwise increases the flow rate and lowers the water temperature; turning the knob clockwise decreases the flow and increases the water temperature.
The position of the regulator also determines the water flow at which the machine is switched on.
The gas flow regulator 2 adjusts the amount of gas entering the burner in order to obtain the required water temperature at its set flow rate: turning the regulator counterclockwise increases the gas flow and water temperature; turning the knob clockwise reduces gas flow and water temperature.
When the flow of water stops or when its flow rate decreases to less than 2.5 l / min, the contacts of the microswitch 17 open and valves 13 and 30 close. The burner goes out.
R Figure 3. Scheme of the gas column Neva 4511, 4513
1 - water flow regulator; 2 – gas flow regulator; 3 – water temperature display; 4 - water-gas unit; 5 - burner; 6 - cold water inlet; 7 - gas inlet; 8 - hot water outlet; 9 - gas outlet device; 10 - candle; 11 – flame presence sensor; 12 - heat exchanger; 13 - solenoid valve; 14 - battery compartment; 15 - electronic control unit; 16 - thermal relay (thrust sensor); 17 - microswitch; 18 – water temperature sensor; 19 - thermal relay (water overheating sensor); 20 - plug for draining water; 21 - fitting for measuring gas pressure; 22 - water node; 23 - water purification filter; 24 - water flow limiter; 25 - membrane; 26 - Venturi fitting; 27 - water outlet to the heat exchanger; 28 - gas unit; 29 - gas purification filter; 30 - gas valve; 31 - gas outlet to the burner.
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OPERATION AND REPAIR OF BOILERSIn the name of columns produced in Russia, the letters VPG are often present: this is a water-heating (V) flow-through (P) gas (G) apparatus. The number after the letters HSV indicates thermal power apparatus in kilowatts (kW). For example, VPG-23 is a flow-through gas water heater with a heat output of 23 kW. Thus, the name of modern speakers does not define their design.
The VPG-23 water heater was created on the basis of the VPG-18 water heater, produced in Leningrad. In the future, VPG-23 was produced in the 90s at a number of enterprises in the USSR, and then - SIG. A number of such devices are in operation. Separate nodes, for example, the water part, are used in some models of modern Neva columns.
Main specifications HSV-23:
- thermal power - 23 kW;
- productivity when heated to 45 ° C - 6 l / min;
- minimum water pressure - 0.5 bar:
- maximum water pressure - 6 bar.
VPG-23 consists of a gas outlet, a heat exchanger, a main burner, a block valve and an electromagnetic valve (Fig. 74).
The gas outlet is used to supply combustion products to the flue pipe of the column. The heat exchanger consists of a heater and a fire chamber surrounded by a cold water coil. The height of the VPG-23 fire chamber is less than that of the KGI-56, because the VPG burner provides better mixing of gas with air, and the gas burns with a shorter flame. A significant number of HSV columns have a heat exchanger consisting of a single heater. The walls of the fire chamber in this case were made of steel sheet, there was no coil, which made it possible to save copper. The main burner is multi-nozzle, it consists of 13 sections and a manifold connected to each other by two screws. Sections are assembled into a single whole with the help of coupling bolts. There are 13 nozzles installed in the collector, each of which pours gas into its own section.
The block valve consists of gas and water parts connected by three screws (Fig. 75). The gas part of the block valve consists of a body, a valve, a valve plug, a gas valve cover. A conical insert for the gas valve plug is pressed into the body. The valve has a rubber seal on the outer diameter. A conical spring presses on top of it. The seat of the safety valve is made in the form of a brass insert pressed into the body of the gas section. gas cock has a handle with a limiter, fixing the opening of the gas supply to the igniter. The faucet plug is pressed against the conical liner by a large spring.
The valve plug has a recess for supplying gas to the igniter. When the valve is turned from the extreme left position at an angle of 40 °, the groove coincides with the gas supply hole, and the gas begins to flow to the igniter. In order to supply gas to the main burner, the valve handle must be pressed and turned further.
The water part consists of the bottom and top caps, Venturi nozzle, diaphragm, poppet with stem, retarder, stem seal and stem clamp. Water is supplied to the water part on the left, enters the submembrane space, creating a pressure in it equal to the water pressure in the water supply system. Having created pressure under the membrane, water passes through the Venturi nozzle and rushes to the heat exchanger. The Venturi nozzle is a brass tube with four through holes in its narrowest part that open into an outer circular groove. The undercut coincides with the through holes that are in both covers of the water part. Through these holes, pressure from the narrowest part of the Venturi nozzle will be transferred to the supra-membrane space. The poppet stem is sealed with a nut that compresses the PTFE gland.
The automatic water flow works as follows. With the passage of water through the Venturi nozzle in the narrowest part, the highest speed of movement of water and, therefore, the lowest pressure. This pressure is transmitted through through holes into the supra-membrane cavity of the aquatic part. As a result, a pressure difference appears under and above the membrane, which bends upward and pushes the plate with the stem. The stem of the water part, resting against the stem of the gas part, lifts the valve from the seat. As a result, the gas passage to the main burner opens. When the water flow stops, the pressure under and above the membrane equalizes. The conical spring presses on the valve and presses it against the seat, the gas supply to the main burner stops.
The solenoid valve (Fig. 76) serves to turn off the gas supply when the igniter goes out.
When the solenoid valve button is pressed, its stem rests against the valve and moves it away from the seat, while compressing the spring. At the same time, the armature is pressed against the core of the electromagnet. At the same time, gas begins to flow into the gas part of the block valve. After ignition of the igniter, the flame begins to heat the thermocouple, the end of which is installed in a strictly defined position with respect to the igniter (Fig. 77).
The voltage generated during the heating of the thermocouple is supplied to the winding of the core of the electromagnet. In this case, the core holds the anchor, and with it the valve, in the open position. The time during which the thermocouple generates the necessary thermo-EMF and the electromagnetic valve begins to hold the armature is about 60 seconds. When the igniter goes out, the thermocouple cools down and stops generating voltage. The core no longer holds the anchor, under the action of the spring the valve closes. The gas supply to both the igniter and the main burner is stopped.
Draft automation turns off the gas supply to the main burner and igniter in case of violation of draft in the chimney, it works on the principle of "gas removal from the igniter". Traction automation consists of a tee, which is attached to the gas part of the block valve, a tube to the draft sensor and the sensor itself.
Gas from the tee is supplied to both the igniter and the draft sensor installed under the gas outlet. The thrust sensor (Fig. 78) consists of a bimetallic plate and a fitting, reinforced with two nuts. The top nut is also a seat for a plug that shuts off the gas outlet from the fitting. A tube supplying gas from the tee is attached to the fitting with a union nut.
With normal draft, the combustion products go into the chimney without heating the bimetallic plate. The plug is tightly pressed against the seat, the gas does not come out of the sensor. If the draft in the chimney is disturbed, the combustion products heat up the bimetallic plate. It bends up and opens the gas outlet from the fitting. The gas supply to the igniter decreases sharply, the flame ceases to heat the thermocouple normally. It cools down and stops producing voltage. As a result, the solenoid valve closes.
Repair and service
The main malfunctions of the HSV-23 column include:
1. The main burner does not light up:
- little water pressure;
- deformation or rupture of the membrane - replace the membrane;
- clogged venturi nozzle - clean the nozzle;
- the stem came off the plate - replace the stem with the plate;
- skew of the gas part in relation to the water part - align with three screws;
- the stem does not move well in the stuffing box - lubricate the stem and check the tightening of the nut. If the nut is loosened more than necessary, water may leak from under the stuffing box.
2. When the water intake is stopped, the main burner does not go out:
- dirt has got under the safety valve - clean the seat and valve;
- weakened cone spring - replace the spring;
- the stem does not move well in the stuffing box - lubricate the stem and check the tightening of the nut. In the presence of an igniter flame, the solenoid valve is not held in the open position:
3. Violation of the electrical circuit between the thermocouple and the electromagnet (open or short circuit). The following reasons are possible:
- lack of contact between the terminals of the thermocouple and the electromagnet - clean the terminals with sandpaper;
- violation of the insulation of the copper wire of the thermocouple and its short circuit with the tube - in this case, the thermocouple is replaced;
- violation of the insulation of the turns of the electromagnet coil, shorting them to each other or to the core - in this case, the valve is replaced;
- violation of the magnetic circuit between the armature and the core of the electromagnet coil due to oxidation, dirt, grease, etc. It is necessary to clean the surfaces with a piece of coarse cloth. It is not allowed to clean surfaces with needle files, sandpaper etc.
4. Insufficient heating of the thermocouple:
- the working end of the thermocouple is smoky - remove soot from the hot junction of the thermocouple;
- the igniter nozzle is clogged - clean the nozzle;
- the thermocouple is incorrectly set relative to the igniter - install the thermocouple relative to the igniter so as to provide sufficient heating.
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