Immergas VICTRIX 75 Manual de usuario

VICTRIX 75

Condensation-type wall-hung boiler

for Central Heating only

pre-engineered for external

storage tank

VICTRIX 75

STV75 ed 01/08 VICTRIX 75

VICTRIX 75

Condensing wall-hung open chamber

fan assisted or room-sealed fan-assisted

boiler for central heating only

VICTRIX 75

VICTRIX 75 is a condensing wall-hung open chamber fan assisted

or room-sealed fan assisted boiler for central heating only. With a

special kit (optional) this boiler may be used in conjunction with a

separate boiler unit for the production of domestic hot water with

capacities of 80, 105, 120 and 200 litres.

e boiler is approved for installation both inside a heating station

and outside the building and can be installed single or in cascade by

which we mean the installation of a maximum of 3 boilers in battery

on the same system.

Special hydraulic kits are available as optional accessories to complete

the installation such as the ISPESL safety kit, the distribution

manifold with lter kit, the 3-way diverter valve kit for coupling

the boiler unit storage tank and the hydraulic manifolds kits for

connecting two or three boilers in cascade.

ankstothecondensationtechnology,VICTRIX 75 is distinguished

for its high operating performance and wide modulation range (from

25 % to 100 % of its nominal output).

e boiler has a heat output of 72.6 kW (62.443 kcal/h) and features

an innovative total premix combustion system that ensures minimal

pollution emissions. It can work with natural gas or LPG.

e appliance is regulated and controlled by means of a

microprocessor controlled p.c.b. which, via a display, shows the state

of boiler operation (temperatures, operation status, fault codes, etc.).

General features.

e hydraulic circuit features a water-gas coil exchanger in stainless

steel.

All boilers are tted with an antifreeze device for temperatures of

down to -5 °C.

e VICTRIX 75 boiler must be installed using specic air/ue kits

(green series) made in plastic and especially for the VICTRIX 75

boiler whether it is installed in a single conguration

or in a battery (up to a maximum of 3 boilers).

e plastic (80 mm Ø exible) ducting ue system can also be used,

designed specically for Immergas condensing boilers.

Technical Documentation Technical Documentation

STV75 ed 01/08 VICTRIX 75

VICTRIX 75 main dimensions.

Legend:

V - Electrical connection

G - Gas supply

R - System return

M - System ow

SC - Condensate discharge

(minimum internal diameter

13 mm Ø)

Height (mm) Width (mm) Depth (mm)

950 600 525

Connections

GAS SYSTEM

G R M

3/4” 1”1/2 1”1/2

Technical DocumentationTechnical Documentation

STV75 ed 01/08 VICTRIX 75

VICTRIX 75 main components.

Legend:

1 - Drain funnel

2 - Burner

3 - Draught diverter

4 - Flue thermostat

5 - Condensing module

6 - Air intake pipe

7 - Ignition plug

8 - System ow NTC probe

9 - System return NTC probe

10 - Sleeve with Venturi housing

11 - Venturi

12 - Gas nozzle

13 - Air fan

14 - Condensate siphon

15 - System pressure switch

16 - Flow manifold

17 - 4-bar safety valve

18 - P.C.B.

19 - Condensate discharge pipe

20 - Sample points (air A) - (fumes F)

21 - Vent valve

22 - Cover of condensing module

23 - Overheating safety thermostat

24 - Detection electrode

25 - Current transformer

26 - Pump

27 - Gas valve

Technical Documentation Technical Documentation

STV75 ed 01/08 VICTRIX 75

VICTRIX 75 Control Panel.

Legend:

1 - Main switch

2 - User interface display

3 - Boiler manometer

Technical DocumentationTechnical Documentation

STV75 ed 01/08 VICTRIX 75

VICTRIX 75 hydraulic circuit.

Legend:

1 - External funnel drain

2 - ISPESL certied 4 Bar safety valve

3 - Boiler draining valve

4 - Absolute pressure switch

5 - Flow manifold

6 - Gas valve

7 - Air fan

8 - Gas nozzle

9 - Air intake tube

10 - Ignition electrode

11 - Condensation module cover

12 - Condensation module

13 - Flue thermostat

14 - Flue hood

15 - Air sample point

16 - Flue sample point

17 - Automatic air vent valve

18 - System ow adjustment probe

19 - System return adjustment probe

20 - Overheat safety thermostat

21 - Burner

22 - Detection electrode

23 - Air/gas venturi manifold

24 - Positive Venturi signal (P1)

25 - Boiler pump

26 - Condensate siphon

M - System ow

G - Gas supply

SC - Condensate discharge

R - System return

Technical Documentation Technical Documentation

STV75 ed 01/08 VICTRIX 75

Primary circuit (boiler circuit).

e primary circuit with relevant control and safety devices

is triggered each time there is a request for central heating

or antifreeze.

Operation.

e heat contained in the ue produced by combustion is

absorbed by the pipes of the coil water-gas exchanger tted in

the condensation module (13), which, in turn, transfers it to

the water circulating inside thanks to the boiler pump (28).

Flow-head graph.

e trend of the curve that represents the ow-head ratio

depends on pump speed.

Flow rate (litres/h)

Head (kPa)

Head (m c.a.)

A = Head available to the system at maximum single boiler speed

B = Head available to the system at second single boiler speed

C = Head available to the system at maximum speed with check valve for boilers in cascade (battery)

D = Head available to the system at second speed with check valve for boilers in cascade (battery)

Pump.

e pump works on the primary circuit return and it is physi-

cally coupled to the components supporting plate.

Technical DocumentationTechnical Documentation

STV75 ed 01/08 VICTRIX 75

Primary heat exchanger

(condensation module).

It consists of a casing containing 12 coil shaped elements.

Each element is made of 5 elliptic pipe spirals (3).

e whole module is made of stainless steel. e lower sec-

tion is the sealed combustion chamber while the top is the

condensation chamber (4).

e eight lower elements are heated directly by the cylindrical

burner, while the top four are located inside the condensation

chamber (4) which is separated from the combustion chamber

by a metal plate (see the ue circuit).

To minimise head losses and increase the ow available for

the system, the ow consists of the parallel connection of six

elements while the return consists of the parallel connection

of the remaining six elements.

e exchanger inlet is connected to the boiler pump ow on

which the system return NTC probe is positioned (6) while the

outlet, on which the system ow (7) NTC probe is positioned,

is connected to the primary circuit ow.

readed ttings and a at seals are used to couple the ow

and return pipes of the primary circuit.

e overheating safety thermostat (1) is installed on the system

ow pipe.

e ue hood (5) is connected to the top of the module by a

seal and fastened to the supporting frame by screws.

Condensation is runo from the bottom.

Safety devices and controls.

System pressure switch (2).

is switch detects the pressure inside the primary circuit.

It is housed on the ow manifold body and coupled to a

microswitch that prevents the burner working when pressure

is below 0.3 bar.

It prevents the main exchanger from overheating.

ISPESL type approved 4 bar safety valve (3).

It prevents the safety pressure from being exceeded in the

circuit (4 bar).

It is located at the front of the ow manifold body to which

it is coupled.

When this valve trips it causes water to come through the

system ow pipe to which an extension pipe (4) is connected

that ends with a collection funnel (5).

System

ow

Flue

Condensate

discharge

System

return

System

ow

Technical Documentation Technical Documentation

STV75 ed 01/08 VICTRIX 75

Air-gas circuit.

e circuit consists of a total pre-mix combustion system

comprising a fan (7), a pneumatic type gas valve (9), a Venturi

pipe (5) and a special cylindrical burner (4) that works inside

the condensation module.

Operation.

e fan (7) is controlled by the microprocessor driven p.c.b.

that varies speed according to the output required.

By means of this fan, combustion air is taken from the draught

diverter (3), which is in contact with outside and sent through

a duct where a Venturi pipe (5) is installed.

A positive pressure signal (P1) is located at the Venturi (5) inlet

and varies in a way directly proportional to the quantity of air

extracted by the fan (7) and which is detected by means of a

pressure point connected to the pneumatic gas valve (9).

e energising of the main valve coils causes both internal

shutters to open and the gas to ow through, whose outlet

pressure is regulated by the same pneumatic valve with a 1:1

ratio at pressure “P1”.

rough nozzle (6), gas is injected at the inlet of the Venturi

pipe (5) where pre-mixing begins with the combustion air.

e resulting mix is ignited on the cylindrical burner surface

(4) by a spark of the ignition electrodes (10).

Gas valve.

e gas valve features two main coils controlled by the inte-

grated board and a pneumatic control unit that modulates the

exiting gas pressure at a 1:1 ratio at pressure (P1) detected at

the Venturi pipe inlet.

e ratio between air and gas pressures (o-set) are set on this

valve (see gas regulations).

Electrical coils (4).

Two ON-OFF type coils that are powered by the integrated

board (24 Vdc) when the burner has to be ignited.

ey are connected in series and energised at a voltage of 24

V through a connector (3).

Pneumatic unit (2).

Outlet pressure can be varied with this unit at a 1:1 ratio at

pressure (P1) detected at the Venturi pipe inlet which is re-

turned to the valve through a silicone pipe (1).

anks to this system, the percentages in the air-gas mix remain

constant at optimum values on the entire modulation eld thus

ensuring an almost constant combustion performance.

By means the o-set screw (2) the air-gas ratio can be ad-

justed.

is is only necessary if, after having analysed the ue, incorrect

combustion values are found (see air-gas ratio adjustment).

Technical DocumentationTechnical Documentation

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