bought gas boiler, gas pipeline announced, the heating system installed, it remains the most important thing - to put it all in a single system.Connecting a gas boiler - not an easy task and it is not even that the gas boiler is a high-tech equipment, and most importantly - dangerous equipment, the main problem lies elsewhere: too many different options and wiring diagrams.The method, the procedure of installation and connection roads depends on the individual circumstances.It is strongly recommended that connection, start-up and commissioning of the gas boiler performed authorized service office.In addition, the independent activation of the boiler will void the manufacturer's warranty.But the situation may be different, so in this article we will discuss the main points of connection universal gas boilers.And you will notice that the instruction to your boiler is a higher priority than any article on the Internet.
- Wiring gas boiler
- Connecting a gas boiler
- Connecting the Single-bypass gas boiler
- connection to the gas heating boiler
- electrical connection gas boiler
- Connecting a gas boiler to the chimney
- Connecting boiler to a gas boiler
- Connecting the boiler via a three way valve
- Connecting the boiler via an additional pump
- Connecting the boiler and heating circuit via low loss header
- thermostat connection to the gas boiler
Wiring gas boiler
There are several connection schemesgas boilers.Which one to use depends on how the system is made of heating - open or closed, the coolant it moves by gravity or by a pump has a high-temperature radiator circuit or multiple circuits, which include low-temperature "warm floor".Also of great importance is given boiler - single-circuit or two-circuit, open chamber, or closed, the convection or condensation.
Connecting a gas boiler single-circuit
Single-circuit boiler is equipped with only one heat exchanger, which heats the water for one circuit.Initially these boilers used only for heating, but today they can be successfully used for hot water, adding to the wiring diagram of indirect heating boiler.Single-boilers are wall-mounted and floor-standing, in what - depending on power output.Single-floor boilers more powerful and heavier dual-circuit, they can be used for heating a large country house and provide households with hot water.
To connect single-circuit boiler that you can connect only two coolant pipes - one he will come to the boiler for heating, and on the other - out of it heated.
Wiring the Single-gas boiler for heating .
In the above embodiment, the coolant is circulated through the heating system at home and returned to the boiler for Afterrun.The safety valve and the expansion tank needed to relieve excess pressure from the system.
Wiring the Single-gas boiler for heating and indirect heating boiler.
This scheme presents the easiest way to connect to the indirect heating boiler - via a three way valve.
indirect heating boiler a thermally insulated container in which the water for sanitary purposes.It is this water and we need to be heated.For this purpose inside the boiler integrated spiral heat exchanger through which passes hot water coolant.
In this scheme - water heating for domestic hot water (hot water) is a priority.When the boiler fires sensor that the water cooled, three-way valve is triggered and all the coolant heated in the boiler flows into the boiler.There it gives up its heat to the water and returned to the boiler for Afterrun.Circulation boiler boiler-boiler will continue as long as the water inside the boiler is heated to the desired temperature.After this three-way valve is activated, and the heat transfer fluid from the boiler flows into the heating system will circulate through the scheme boiler-heating boiler until it is time until cool water in the boiler.
All the time hot water boiler for the heating system is not circulating coolant.What takes time heating boiler depends on its capacity.For example, boiler 200 l (for large families) filled with cold water, heated for 6 hours.But donagrev this boiler will take 40 - 50 minutes.Heating boiler smaller volume, e.g., 80 l takes 10 - 20 minutes.This time does not significantly affect the overall temperature in the building, such a short period it is not yet time to cool.
Connecting a bypass gas boiler
Turbofan boiler different from the single-circuit what it two heat exchangers - one basic, warm water for heating, and the second - an additional, heat water for hot water supply.Most of these boilers are high-tech boiler room, where everything is provided and automated, and are wall-mounted.
Please note the photo, which shows the inside of the boiler bypass.It connects the pipe 5 (right to left): 1 - the coolant pipe from the heating system, which goes to donagrev, 2 - pipe with cold water, which is a heat exchanger to heat water for hot water, 3 - gas pipe, 4 - pipehot water for hot water, 5 - a pipe with the hot coolant to the heating system.
All Automatic bypass is arranged inside the boiler.Default coolant heated in the boiler main burner is directed to heating and cooled down again returned to the boiler.So is the circulation boiler-heating boiler.But as soon as someone opens the hot water tap on one of the consumers, the boiler starts flowing cold water through the pipe 2. The three-way valve is immediately redirects the coolant, and it does not go beyond the boiler and circulating the primary heat exchanger - additional heat exchanger for heatingWater - the main heat exchanger.The coolant heats water for hot water until it is used.Once the valve is closed, the coolant begins to circulate again on the heating system.
Wiring bypass gas boiler directly.
As shown, double-pressure boiler is not able to provide a large amount of water for domestic hot water, no more than the consumer - a kitchen or a shower, and then - the water is not too warm.Boiler simply will not have time to heat it in the proper amount.That is why they are used only in small families, and for heating water in high amounts added in the boiler.
Wiring bypass gas boiler with a boiler of indirect heating.
Under the present scheme will only coolant to heat water in the boiler and the system of water supply to the second circuit will be closed.This trick significantly increases the durability of a bypass of the boiler, which is very much suffering from hard tap water.Additional heat exchanger for hot water clogged and out of action for about a year.That is why the circulation of clean coolant in the second circuit is a more economical option.But then what is the point to use double-pressure boiler, if it is possible to install single-circuit high power?It will be more profitable and practical.
Wiring bypass the boiler with a boiler / storage.
connection wall gas boiler paired with the usual elektroboyler as a storage tank for hot water is also possible.In this case, the hot water from the boiler will be supplied to the boiler, and when its quantity decreases to a critical point (set automatics), the boiler will heat the water again to fill the tank.It is also possible that the boiler is filled with hot water from the boiler and its subsequent temperature is maintained by heating element.
Universal wiring diagrams gas boilers we reviewed, now move on to the installation procedure of pipes and components.
connection to the gas heating boiler
Despite the fact that the above schemes to indicate which connects the feed pipe, and where tapping, carefully read the instructions on your gas boiler.Location of the pipes may vary depending on the model and manufacturer.
to start a couple of words about the heating system.If it has operated previously, and now you are just changing the boiler, the system must be drained of coolant and be sure to rinse it several times.On the walls of the pipes and radiators settles a lot of different salts, so they do not clog the delicate heat boiler, it is better not to be lazy and wash system.
in the heating system can circulate as the water , and antifreeze .Can I use an antifreeze specifically with your boiler, be sure to look in technical documentation.Sometimes manufacturers of boilers do recommend certain brands of antifreeze, or even produce it themselves.To ignore such recommendations are not worth it.
Use antifreeze as coolant in the heating system only makes sense if you live in the house and turn off the boiler arrivals when leaving for a long time.Water pipes may then be frozen and no antifreeze.But if you live in the home permanently and disconnect the boiler in cold weather, it makes sense to use water as a coolant.The reason for that - the shortcomings of antifreeze: a small heat capacity, higher viscosity and thermal expansion coefficient.For the entire system is threatened by the fact that anti-freeze is necessary to use the boiler and pumps more power, higher capacity storage tank and radiators larger area.
in favor of the use of water also says that modern gas boilers can be placed in a safety net mode when the coolant cools down to +5 ° C, the boiler heats up again.
Wiring to the boiler heating is :
- circulation pump (if necessary).
- ball valve.
- ball valve.
- Quick Connect "American."
circulation pump is always set to "return pipe". Ball valves are required in order to easily disconnect the system from the boiler without draining the coolant, and quickly remove the filter for the prevention and treatment. coarse filter in the heating system is necessary in order to protect the heat exchanger from clogging the boiler salts, put directly before the boiler, preferably on a horizontal section of a sump / catcher down.If possible install a filter on a horizontal pipe section is not, then set it to the upright.Flow direction must necessarily coincide with the direction of the arrow on the filter housing.
pipes with hot coolant coming from the boiler must be connected to the boiler pipe using quick connect "American" and also set the shut-off ball valve.
the upstream and downstream pipe must be installed with the coolant ball valves for emptying the system for the summer or for repairs.
Wiring to the hot water boiler Turbofan:
- ball valve.
- fine filter or a magnetic filter.
- ball valve.
- Quick Connect "American."
To maximize the life of an additional heat exchanger bypass the boiler and to protect it from the scale on the supply pipe with cold water is necessary to establish strainers and magnetic filter .If the coarse filter has been previously set - up to the water meter, then set it ahead of the boiler does not make sense.
outlet pipe from the hot water must be connected to the pipe by means of a ball valve with "American", it is advisable to install a check valve.
All connections must be sealed with oakum or FUM-tape, and even better special sanitary paste.
electrical connection gas boiler
Modern gas boilers are available with two versions of the connection to the mains - cable with plug for connection to the outlet and a three-wire cable bushing.Whichever option you are not caught in any case should follow this rule: the connection of the gas boiler is made through an individual circuit breaker directly to the visor and always need to take care about grounding.It is also desirable to use surge protectors or backup power supply in case of power outage.
Automatic shutdown installed close to the boiler, so that it can be easily and quickly removed.Even if the boiler has a cable with a plug, it is necessary for him to fulfill a personal outlet for the power goes through the circuit breaker.
Grounding boiler or heating pipe pipeline impossible.To ensure quality of grounding is necessary to equip a ground loop or ground point.For the latter, there are ready to sell Universal kit module ground (ZZ-000-015), installation of which will take 0,5h0,5 m plot in the basement, sub-field or on the street next to the house.The resistance of the grounding circuit for the boiler heating should not exceed 10 ohms.In different sources, you can find other figures, but gas service require just such indicators - no more than 10 ohms.This is necessary for the safety net and is connected with the fact that the pillars power overhead lines have largely re-ground.
Connecting a gas boiler to the chimney
Gas boilers are different - one needs a conventional chimney, another - coaxial, and the third (parapet boilers) - do not need.Therefore, read the manual for your boiler.Moreover, often complete with a gas boiler already has a chimney, it is only necessary to mount correctly.
Rule one - diameter of the flue of the boiler must be equal to or greater than the diameter of the outlet in the boiler .
most common diameter of the chimney depends on the power:
- up to 24 kW - 120 mm.
- 30 kW - 130 mm.
- 40 kW - 170 mm.
- 60 kW - 190 mm.
- 80 kW - 220 mm.
- 100 kW - 230 mm.
Conventional flues output up above the ridge of house 0.5 m. They can be arranged inside the wall of the house and inside the house or outside.No more than three bends in the pipe.The first section of the pipe connecting the boiler to the main flue should be not more than 25 cm. The tube must necessarily be to close the opening of the Audit cleaning.For boilers with conventional chimneys and open combustion chamber requires a large flow of air, it can provide either an open window or a separate air supply pipe.
second rule - chimney must be made of roofing sheets or other material resistant to acids .The same applies to the short sections, turning the knees and stuff.Do not connect the boiler to the main flue corrugations can not be used brick chimney.The resulting combustion gas produces steam, saturated with sulfuric acid and other acids, in acid condensation precipitate corrodes and the chimney walls.
Rule Three - coaxial flue is mounted horizontally and output directly into the wall .This type of chimney is a pipe in the pipe.