Immergas VICTRIX R 24 1 I User manual

VICTRIX R 24 1 I
Condensation wall hung boiler
for central heating only
VICTRIX R 24 1 I

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STVR1I ed 04/08 VICTRIX R 24 1 I
Technical Documentation Technical Documentation
VICTRIX R 24 1 I
Condensing, sealed chamber suspended boiler
for central heating only. Can be coupled to a
separate storage tank unit
VICTRIX R 24 1 I
VICTRIX R 24 1 I is a wall-hung sealed generator (type C)
with useful heat output of 24 kW (20,640 kcal/h) for room
central heating, prepared for:
- installation on open vessel systems;
- connection to an external pump;
- connection to one external 3-way valve for coupling to a
separate 80, 105, 120 and 200 litre Storage Tank Unit for the
production of domestic hot water.
anks to condensing technology, the boiler distinguishes itself
due to its high eciency and large eld of modulation (from
20 % to100 % of the nominal heat output).
The boiler has a total premix combustion system that
guarantees particularly reduced pollutant emissions and allows
functioning with natural gas or LPG.
e VICTRIX R 24 1 I series boiler is type-approved for
outdoor installation in a partially protected place.
N.B.: a partially protected place is where the appliance is not
exposed to the direct action of weather (rain, snow, hail etc..).
Adjustment and control are entrusted to a P.C.B. with
micro processor with continuous ame modulation, which
using a back-lit display shows the boiler functioning status
(temperatures, safety devices, etc.) and allows connection
(optional) to the Comando Amico Remoto remote control.
is allows to manage and control the boiler at a distance with
extreme simplicity, at the external probe, at the zones control
unit and at the Multi-system Distribution Manifold.
General features.
e hydraulic circuit has a water-gas heat exchanger with coil
in STAINLESS STEEL.
e boiler has an anti-freeze safety device as per standard
that protects it to a temperature of -5°C.
e VICTRIX R 24 1 I boiler must be installed using the
intake/exhaust kits or the ducting systems (Ø 60 mm rigid and
Ø 80 mm exible) realised in plastic and designed expressly for
Immergas condensing boilers.

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Technical DocumentationTechnical Documentation
Main dimensions and VICTRIX R 24 1 I connections.
Key:
V - Power supply connection
G - Gas supply
SC - Condensate drain (min. internal diameter Ø 13 mm)
R - System return
M - System ow
Height (mm) Width (mm) Depth (mm)
795 440 250
CONNECTIONS
GAS SYSTEM
G R M
3/4” 3/4” 3/4”

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VICTRIX R 24 1 I control panel.
Key:
1 - Boiler status signal display
2 - Stand-by selector- D.H.W./Remote Control - D.H.W. and Central Heating - Reset
3 - Domestic hot water temperature selector
4 - Central heating temperature selector

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VICTRIX R 24 1 I main components.
Key:
1 - Electric connection terminal board
(very low voltage)
2 - Condensate drain trap
3 - Gas valve
4 - Voltage transformer
5 - Fan
6 - Gas nozzle
7 - Venturi
8 - Burner
9 - Flue safety thermostat
10 - Detection electrode
11 - Air intake pipe
12 - Negative sign pressure point
13 - Positive sign pressure point
14 - Sample points (air A) - (ue exhaust F)
15 - Manual air vent
16 - Flue hood
17 - Condensation module
18 - Ignition electrode
19 - Flow probe
20 - Safety thermostat
21 - System ow switch
22 - System draining valve
23 - ree-way connection box external pump

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VICTRIX R 24 1 I hydraulic layout.
Key:
1 - Condensate drain trap
2 - Gas valve
3 - Gas valve outlet pressure point (P3)
4 - Air/gas Venturi collector
5 - Fan
6 - Gas nozzle
7 - Detection electrode
8 - Flue safety thermostat
9 - Air intake pipe
10 - Condensation module
11 - Flue hood
12 - Air sample point
13 - Manual vent valve
14 - ∆p gas pressure point
15 - Flue sample point
16 - Flow probe
17 - Safety thermostat
18 - Ignition electrodes
19 - Burner
20 - Condensation module cover
21 - Venturi negative signal (P2)
22 - Venturi positive signal (P1)
23 - System ow switch
24 - System draining valve
G - Gas supply
SC - Condensate drain
R - System return
M - System ow
Primary circuit.
e primary circuit with relative control and safety devices
is made to operate every time there is a central heating or
anti-freeze request.
Operation.
e heat contained in the fumes produced by combustion
is absorbed by the pipes of the primary coil water-gas heat
exchanger inserted into the condensation module (10), which
then gives this up to the water made to circulate inside it from
the external pump (optional, not supplied with the generator).
e water is introduced directly into the system.

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Primary heat exchanger
(condensation module).
It is formed by a casing that contains 4 coiled elements.
Each element is made up from 5 elliptical spirals (3).
e entire module is realised in stainless steel and its internal
part makes up the sealed combustion chamber and the
condensation chamber (2).
e rst three elements are aected directly by the action of
the cylindrical burner applied to the front, while the fourth is
arranged in the condensation chamber, which is separated from
the combustion chamber by sheet steel (see ue circuit).
To reduce head losses to a minimum and increase the ow rate
available to the system, the ow is made up from the parallel
connection of the rst two elements, the return, instead is made
up from the parallel connection of the last two elements.
e inlet of the heat exchanger is connected to the external
pump ow (optional, not supplied with the boiler) and the outlet,
on which the NTC ow probe is positioned (1), is connected
to the primary circuit ow.
e primary circuit is coupled to the ow and return pipes
using threaded ttings with at gaskets.
e ue hood (4) is connected to the rear using a relevant
gasket blocked by a metal ring.
e condensate drain is also found in the lower part.
To ease the escape of any air bubbles still present in the coils,
there is a manual air vent in the upper part of the module
(5).
2
1
4
3
5
RETURN
FLUE
CONDENSATION
RUNOFF
FLOW

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System ow switch (1).
Faced with circulation of water with a ow rate of at least
400 l/h, the system flow switch (1) enables generator
functioning.
is takes place by means of a disc connected to a micro
switch, which rising when hit by the ow of water, closes an
electric contact.
e closing of the contact, which is positioned outside of the
pipe where the water passes, allows the integrated P.C.B. to
start the generator.
e body is made of two parts in plastic, which are xed to
each other by two self-tapping screws.
e ow switch (1) is push-tted onto the system return pipe
(2) and blocked by two appropriate shaped forks.
1
2
FLOW
RETURN

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Air-gas circuit.
e circuit consists of a total premix combustion system com-
posed of a fan (5), a pneumatic gas valve (7), a Venturi pipe
(3) and a special cylindrical burner (8) that operates inside the
condensation module.
Functioning.
e fan (5) is controlled by the integrated P.C.B. that varies
its speed depending on the output requested.
Its functioning allows to withdraw combustion agent air from
outside of the sealed chamber and introduce it into a pipe
where a Venturi pipe is inserted (3).
At the inlet to the Venturi (3) there is a positive pressure signal
(P1) variable in a directly proportional manner to the amount
of air taken in by the fan (5) and which is detected by a pressure
point connected to the pneumatic gas valve (7).
e electric power supply of the valve main coils causes both
internal shutters to open and allows the passage of gas, whose
outlet pressure is regulated by the same pneumatic valve in a
1:1 ratio to pressure “P1”.
e gas is injected at the entry of the Venturi pipes (3) through
a nozzle (4), where the premix starts with the combustion
agent air.
e mixture obtained in this way is ignited on the surface
of the cylindrical burner (8) by the discharge of the ignition
electrodes (9).
Gas valve.
e gas valve is equipped with two main coils controlled by
the electric circuit and with a pneumatic unit that modulates
the outlet gas pressure in 1:1 ratio to the pressure (P1) detected
on the inlet of the Venturi pipe.
e calibration of the ratio between the air and gas pressures
are carried out on the valve (o-set) (see gas regulations).
Electrical coils (4).
ere are two ON-OFF coils that are powered (230 V AC) by
an integrated P.C.B. when the burner must be ignited.
ey are connected in series and powered by the mains voltage
rectied by means of a jumper of diodes arranged inside the
connector (3).
Pneumatic unit (2).
Allows to vary the outlet pressure in 1:1 ratio with the pressure
(P1) detected at the inlet of the Venturi pipe that is taken back
to the valve using a small silicone pipe (1).
anks to this system, the percentages in the air-gas mixture
are maintained constant at optimal values on the entire range
of modulation, thus guaranteeing a more or less constant
combustion eciency.
e air-gas ratio calibration can be performed using the o-set
adjusting screw (2).
is is necessary only when, after having performed ue
analysis, incorrect combustion parameter values are detected
(see air-gas ratio regulation).
1
2
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