Login

User Name  
Password  
Create account

Who is online

We have 66 guests and no members online

Scarica pagina in PDF

MEGA PREX N 80 (cod. 00910800)

MEGA PREX N OPERATING PRINCIPLES


The boiler consists of 2 overlapped units of same capacity and one only control panel for both units. Each unit can work independently and the boiler can be operated partially. This means that all panel controls (burner switches, thermostats and thermometers) have been doubled. See paragraph 4.5 on connection. As an example, bi-thermostats TR1 and TR2 can be adjusted so that there is a 10°C intervention difference between each other (do not forget that knobs have a 60° to 90° regulation range with a 1/4 turn rotation). Flow water temperature after 2 equal flows have been mixed corresponds to mean temperature displayed by the 2 thermostats of each unit.

 

ELECTRICAL CONNECTION


The boiler must be connected to a power supply of 230V/50Hz single-phase + ground, following the instructions below: The system must be in compliance with the SAFETY REGULATIONS IN FORCE. - Fit a bipolar line disconnection switch in conformity with CEI-EN regulations (contact opening of at least 3 mm). - Respect the L  (phase) - N (neutral) connection - Use cables with a cross-section equal to or greater than 1.5 mm 2 - Refer to the wiring diagrams in this manual for any electrical operation. - Make the ground connections to an effective ground system.


MEGA PREX N CONTROL PANEL OPERATIONS

Use main switch (11) to power up the panel and all the connected devices. Switches (12) and (13) in turn, power off the plant burner and pump. Thermostat (21) is used to regulate boiler working pressure. Min pressure thermostat stops the plant pump during start up and until the boiler temperature has reached 50°C. In case of three-phase burners and/or pump or if electrical input exceeds 3A, remote contactors should be provided between the boiler control panel and the load. The electric line supplying the boiler control panel should be provided with a protection fuse-switch.

WARNING • For the electric connection of boilers exceeding 300.000 kcal/h rated power, the technician should make ready an additional (2nd) safety thermostat.

 

pannello comandi

Legend:

A - Operating burner light

B - Counter (optional)

22 - Safety

30 - Termometer

 

INSTALLATION


Before connecting the boiler, perform the following operations:

• Thoroughly clean all the system pipes in order to remove any foreign matter that could affect correct operation of the boiler;

• Check that the flue has an adequate draught, that there is no narrowing of passages and that it is free from debris; also check that other appliances do not discharge into the flue (unless designed to serve several utilities). See the regulations in force.

 

BOILER ROOM

As a rule, regulations in force should be always observed. Premises in which boilers will be installed should be sufficiently ventilated and guarantee access for ordinary and extraordinary maintenance operations.

FLUE

The pressurised boiler that now equips your heating system is so-called because it uses a burner provided with fan which introduces into the combustion chamber the exact amount of air necessary in relation to the fuel and maintains an overpressure in the furnace equivalent to all the internal resistances of the flue gas path as far as the boiler exhaust. At this point the fan pressure should have dropped to zero to prevent the flue connection pipe and the lower area of the flue itself from being under pressure and combustion gas leaks occurring in the boiler room. The connection pipe from the boiler to the base of the flue must slope upwards in the direction of the flue gas flow with recommended gradient of no less than 10%. Its path must be as short and straight as possible with the bends and fittings rationally designed in accordance with air duct criteria.
The paragraph Technical Specifications specifies the flue connection diameters of the boilers for lengths of up to 1 metre. For more winding paths, the diameter must be suitably enlarged.

 

PRELIMINARY CHECKS

Before starting the boiler, check that: - the rating plate specifications and power supply network (electricity, water, gas or fuel oil) specifications correspond; - the burner power range is compatible with the power of the boiler; - the boiler room also contains the instructions for the burner; - the flue gas exhaust pipe is operating correctly; - the air inlet supply is well dimensioned and free from any obstacle; - the manhole , the smokebox and the burner plate are closed in order to provide a complete flue gas seal; - the system is full of water and that any air pockets have therefore been eliminated; - the anti-freeze protections are operative; - the water circulation pumps are operating correctly. - The expansion vessel and the safety valve(s) have been connected correctly (with no interception) and are properly operating. - Check the electrical parts and thermostat operation.

WATER TREATMENT

The most common phenomena that occur in heating systems are: - Scaling Scale obstructs heat transfer between the combustion gases and the water, causing an abnormal increase in the temperature of the metal and therefore reducing the life of the boiler. Scale is found mostly at the points where the wall temperature is highest and the best remedy, at construction level, is to eliminate areas that overheat. Scale creates an insulating layer which reduces the thermal transfer of the generator, affecting system efficiency. This means that the heat produced by burning the fuel is not fully exploited and is lost to the flue.

diagramma

Scale diagram

%: fuel not used

mm: mm scale

 

- Corrosion on the water side Corrosion of the metal surfaces of the boiler on the water side is due to the passage of dissolved iron through its ions (Fe+). In this process the presence of dissolved gases and in particular of oxygen and carbon dioxide is very important. Corrosion often occurs with softened or demineralised water which has a more aggressive effect on iron (acid water with Ph <7): in these cases, although the system is protected from scaling, it is not protected against corrosion and the water must be treated with corrosion inhibitors.

 

FILLING THE SYSTEM


The water must enter the system as slowly as possible and in a quantity proportional to the air bleeding capacity of the components involved. Filling times vary depending on the capacity and characteristics of the system but should never be less than 2 or 3 hours. In the case of a system with closed expansion vessel, water must be let in until the pressure gauge indicator reaches the static pressure value pre-set by the vessel. Heat the water to maximum temperature and never over 90°C. During this operation the air contained in the water is released through the automatic air separators or through manual bleed valves. The water discharged from the system with elimination of the air is made up by the automatic or manual filling valve.

Techincal Data:

 

Model Useful power Heat capacity fireplace Yield 100% Minimum useful power Side pressure drop fumes Side pressure drop water (∆T=12°C) Max press. Operating Capacity
kW kcal/h kW kcal/h % kW kcal/h mbar mbar bar l
MEGA PREX N 80  80 69.000 87 74.820 91,95 40 34.000 1 9 5 105
MEGA PREX N 90 90 77.000 98 84.280 91,84 45 39.000 0,8 10 5 123
MEGA PREX N 100 100 86.000 109 93.740 91,74 50 43.000 1 12 5 123
MEGA PREX N 120  120 103.000 131 112.660 91,6 60 52.000 1,1 13 5 123
MEGA PREX N 150  150 129.000 163 140.180 92,02 75 65.000 1,2 14 5 172
MEGA PREX N 200  200 172.000 218 187.480 91,74 100 86.000 1,9 15 5 172
MEGA PREX N 250  250 215.000 272 233.920 91,91 125 108.000 2 15 5 220
MEGA PREX N 300  300 258.000 325 279.500 92,31 150 129.000 2 16 5 300
MEGA PREX N 350 350 301.000 380 326.800 92,11 175 151.000 2,9 18 5 356
MEGA PREX N 400  400 344.000 434 373.240 92,17 200 172.000 4,1 20 5 360
MEGA PREX N 500 500 430.000 542 466.120 92,25 250 215.000 4,2 22 5 540
MEGA PREX N 620 620 533.000 672 577.920 92,26 310 267.000 6,4 27 5 645
MEGA PREX N 750  750 645.000 813 699.180 92,25 375 323.000 5,2 25 5 855
MEGA PREX N 850  850 731.000 921 792.060 92,29 425 366.000 7,2 27 5 855
MEGA PREX N 950  950 817.000 1030 885.800 92,23 475 409.000 5,2 32 5 950
MEGA PREX N 1020 1020 877.000 1106 951.160 92,22 510 439.000 4 26 5 1200
MEGA PREX N 1200  1200 1.032.000 1301 1.118.860 92,24 600 516.000 5,5 30 5 1200
MEGA PREX N 1300  1300 1.118.000 1409 1.211.740 92,26 650 559.000 6,5 32 5 1200
MEGA PREX N 1400  1400 1.204.000 1517 1.304.602 92,29 700 602.000 6 28 5 1500
MEGA PREX N 1600  1600 1.376.000 1733 1.490.380 92,33 800 688.000 6,5 32 5 1500
MEGA PREX N 1800  1800 1.548.000 1950 1.677.000 92,31 900 774.000 7 37 5 1650
MEGA PREX N 2000  2000 1.720.000 2167 1.863.000 92,29 1000 860.000 6 35 5 200
MEGA PREX N 2400  2400 2.064.000 2600 2.236.000 92,31 1200 1.032.000 7,5 40 5 2300
MEGA PREX N 3000  3000 2.580.000 3250 2.795.000 92,31 1500 1.290.000 8 49 5 3150
MEGA PREX N 3500  3500 3.010.000 3792 3.726.380 92,3 1750 1.505.000 9 60 5 3650
MEGA PREX N 4000  4000 3.440.000 4333 4.183.900 92,31 2000 1.720.000 9 60 6 4450
MEGA PREX N 4500  4500 3.870.000 4865 3.870.000 92,5 2250 1.935.000 10 52 6 4900
MEGA PREX N 5000  5000 4.300.000 5402 4.645.720 92,56 2500 2.150.000 10 58 6 6200
MEGA PREX N 6000  6000 5.160.000 6480 5.572.800 92,59 3000 2.580.000 12 62 6 6980
Product Date  

© Copyright Lamborghini Calor 2014. All Rights Reserved.
Lamborghini Calor S.p.A. - Via Statale, 342 - C.P. 46 - 44047 Dosso - FE - Italy - UNI EN ISO 9001 Certified Company
Capitale Sociale € 827.112,00 int. vers. - Cod. Fisc. - P.Iva e Reg. Impr. Ferrara n° 00173420381 Sole Shareholder Management and coordination of Ferroli S.p.A.