Connecting the turbo nozzle to the Lemax Nova boiler. The chimneys are separate. Turbo nozzle connection diagram

Igor November 2, 2016
“I bought a boiler “LEMAX” of the “PREMIUM” series with automatic equipment SIT 820 NOVA and a turbocharger “LEMAX”. Invited from service center for servicing gas boilers to start the boiler and connect the turbo nozzle to the boiler. The nozzle was connected, but not quite correctly. The nozzle fan runs constantly. When the main gas burner is turned off, the fan does not stop. I drew the attention of specialists to this, and they repeatedly tried to correct this situation. But to no avail. In the end they left me. I have a question - how to connect the nozzle so that the fan stops when the main burner is turned off? Thank you in advance for your advice."

In today’s article we will try to tell you what a turbocharger for a Lemax gas boiler is, what boilers it is suitable for, and we will try to answer the question that was left on our forum on November 2 by user Igor.

The turbo nozzle is designed for removal of combustion products using a forced method, which makes it possible to use gas boilers without a specially organized natural draft chimney.
For boilers with a power of 10 kW, the chimney diameter is 100 mm.
For boilers with power from 12.5 to 30 kW. chimney diameter 130 mm.
For boilers with power from 35 to 40 kW. chimney diameter 140 mm.
The product has a fan installed at a rated voltage of 220 V. 50 Hz

The turbo nozzle consists of a housing on which a fan No. 3 with inlet and outlet pipes is installed. A pressure switch (air pressure switch) item 4 is installed on the housing, connected to the fan by a tube. All electrical connections are switched through the terminal block, item 7.

1 – Turbo nozzle base.
2 – Turbo nozzle cover.
3 – Fan
4 – Monostat.
5 – Monostat connection tube.
6 – Smoke exhaust pipe.
7 – Terminal block.

Device and operation.
The turbo nozzle control unit is designed for connection to boilers equipped with automatic safety SIT 820 NOVA And SIT 845 Sigma.

The turbo nozzle performs forced removal of boiler combustion products based on a signal from the thermostat (the thermostat installed on the boiler maintains the temperature at the level specified by the consumer). In this case, the pressure switch (air pressure switch) closes the contacts only when the air pressure at the outlet of the turbo nozzle corresponds to the specified parameter. If the pressure in the chimney exceeds or falls below the set limit, the contacts will open and the boiler safety circuit will break.
In the event of an emergency stop of the turbo fan or when the flue gas outlet is blocked, the operation of the boiler stops, that is, the safety automatic SIT 820 NOVA (volatile boiler control unit) stops the gas supply to the main burner.

Chimney pipe placement:
? if there is no condensate collector, it should be installed at an angle to the ground, preventing condensate from flowing back. The optimal slope is 3–6°.
? the minimum horizontal distance to doors, windows and open ventilation grilles (openings) should be 0.5 meters;
? the minimum distance to the top edge of doors, windows and open ventilation grilles (openings) should also be 0.5 meters;
? the vertical distance from the windows located above the smoke duct opening is from 1 meter;
? in the area of ​​1.5 meters from the pipe there should be no obstacles, say, walls, pillars, etc.;
? each turn reduces the length of the pipe by: 0.5 meters - 45 degrees, 1 meter - 90 degrees;
? To avoid clogging and blowing out, it is mandatory to install a deflector on the chimney

TP - safety thermostat
TR - adjustable thermostat

Diagram of a Lemax turbocharger for a non-volatile boiler.



TR - adjustable thermostat
VT - fan
PT - pressure switch (air pressure switch)
RP - intermediate relay

Connection diagram of the Lemax turbocharger to a boiler with SIT 820 Nova safety automatic and time delay unit (PML 1100 starter and PVL-22(21) attachment).

TP - safety thermostat
TR - adjustable thermostat
BZV - Time delay block

Lemax turbocharger diagram"for a non-volatile boiler.


TP - safety thermostat
TR - adjustable thermostat
VT - fan
PT - pressure switch (air pressure switch)

Connection diagram of the Lemax turbo nozzle to a boiler with automatic safety system SIT 820 Nova


TP - safety thermostat
TR - adjustable thermostat

Connection diagram of the Lemax turbo nozzle to the boiler with a control board.

TR - thermal relay

Set of wires for connecting the Lemax turbo nozzle


P - pink
B - white
G - blue
K - red
W/G yellow-green

1. Disconnect wire No. 5 from connector No. 7.
2. Connect wire No. 5 to wire No. 3.
3. Disconnect wire No. 6 from connector No. 8.
4. Connect wire No. 6 to wire No. 4.
5. Connect wire No. 1 to connector No. 7.
6. Connect wire No. 2 to connector No. 8.

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1. Security measures

1.1. The turbocharger must be installed and put into operation by the organization

tions that have permission to this type works To prepare the turbocharger for use, only specially trained personnel who have the appropriate electrical safety group, as well as knowledge of the regulatory operational documents of the facility where the product is installed, are allowed.

1.2. Work on transportation, installation and preparation of the turbocharger must be carried out in the absence of voltage in its electrical circuits.

2. Preparing the product for use

2.1. The turbocharger is installed on the boiler, and the smoke exhaust pipe is led outside; during installation it is necessary to ensure condensate drainage. (See Appendix A). When laying, the required fire resistance limits of their structures must be ensured in accordance with SNiP 41-01. During operation of the boiler, it is necessary to ensure that the air necessary for combustion enters the room.

2.2. The electrical connection of the turbo nozzle must be made in accordance with the diagram given in Appendix B.

2.3. When the boiler is operating, it is prohibited to place objects made of highly flammable materials closer than 200 mm (for example, wood fiber boards, polyurethane, polyethylene, lightweight PVC, synthetic fibers, cellulose substances, and the like).

2.4. After installation, check the correct operation of the turbo nozzle:

• After turning on the boiler, the fan starts first. Next, after closing the contacts of the monostat, the main burner lights up.
• when the outlet of flue gases from the turbo nozzle is blocked, the fan continues to operate, but the main burner does not light up.

2.5. If the boiler does not have an overheating sensor installed (at 95 degrees/Celsius), it must be installed in the upper part of the heat exchanger and connected according to the “Turbo nozzle connection diagram” (see Appendix B).

OPERATING LIMITATIONS

1. The chimney from the boiler to the turbo nozzle must not create resistance to the movement of exhaust gases (constrictions or turns are not allowed).

2. The vacuum at the inlet to the turbo nozzle must be at least 5 Pa.

3. The turbo nozzle is designed to operate with a rated voltage of 220 V. 50 Hz.

4. The turbo nozzle is not intended for removing combustion products from solid fuel boilers, removing smoke during a fire, or for operating wall-mounted boilers.

5. When installing and servicing the turbo nozzle, electrical safety measures must be observed.

MAINTENANCE

1. Maintenance must be done at least once a year. Only specially trained personnel with an appropriate electrical safety group, as well as knowledge of the facility’s regulatory operational documents, are allowed to carry out maintenance. During maintenance, it is necessary to check the condition of the fan, monostat, and tubes, as well as electrical wires. Clean the turbo nozzle from dust and, if necessary, lubricate the moving parts with machine oil.

2. After completing the work, be sure to check the functionality of the turbo nozzle. (see clause 2.3.3.)

• if there is no condensate collector, it should be installed at an angle to the ground, preventing condensate from flowing back. The optimal slope is 3-6°.
• at a distance of at least 2 meters from the ground level;
• the minimum horizontal distance to doors, windows and open ventilation grilles (openings) should be 0.5 meters;
• the minimum distance to the top edge of doors, windows and open ventilation grilles (openings) should also be 0.5 meters;
• the vertical distance from the windows located above the smoke duct opening is from 1 meter;
• in the area of ​​1.5 meters from the pipe there should be no obstacles, say, walls, pillars, etc.;
• each turn reduces the length of the pipe by: 0.5 meters - 45 degrees, 1 meter - 90 degrees;
• To avoid clogging and blowing out, it is mandatory to install a deflector on the chimney.