De Dietrich MS 24 BIC – страница 4
Инструкция к Настенному Котлу De Dietrich MS 24 BIC
3. COMMISSIONING THE BOILER
To light the boiler correctly, proceed as follows:
1) power the boiler
2) open the gas tap;
3) press the button (
) and switch the boiler to Summer ( ), Winter ( ) or heating only ( );
4) press the heating circuit (+/-) and domestic hot water circuit ( ) temperature adjustment buttons ( ) in order to ignite
the main burner.
When the boiler is lit, the symbol ( ) will appear on the display.
In the Summer position ( ) the main burner will only ignite if a DHW tap is opened.
WARNING
During initial ignition, the burner may not ignite (causing the boiler to shut down) until any air in the gas pipes is vented. In
this case, repeat the ignition procedure until gas reaches the burner. Press button (
), for at least 2 seconds.
0805_2302 / CG_2072
SYMBOL KEY
BUTTON KEY
Operation in the heating mode
On / Off / Summer / Winter / heating only
Flame present (burner on)
(
+/-) : CH temperature adjustment
No ame (ignition failure)
(
+/-) : DHW temperature adjustment
Operation in the DHW mode
Reset
Generic fault
Information
RESET
No water (Low system pressure)
Numerical signal (Temperature, fault code, etc.)
Figure 1
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4. ADJUSTING ROOM TEMPERATURE AND DHW TEMPERATURE
The system must be tted with a room thermostat for controlling indoor temperature.
Adjust the room temperature (
) and the DHW temperature ( ) by pressing the respective +/- (gure 1). The ignition
of the burner is shown on the display with the symbol (
) as described in section 3.
HEATING
While the boiler is operating in the heating mode, the display (gure 1) shows the ashing symbol (
) and the heating
delivery temperature (°C).
DOMESTIC HOT WATER
While the boiler is operating in the DHW mode, the display (gure 1) shows the ashing symbol ( ) and the DHW output
temperature (°C).
5. DESCRIPTION OF BUTTON (Summer - Winter - Heating only - Off)
Press this button to set the following operating modes:
• SUMMER
• WINTER
• HEATING ONLY
• OFF
In the SUMMER mode, the display shows (
). The boiler satises requests for DHW only while central heating is NOT
enabled (ambient frost protection function active).
In the WINTER mode, the display shows (
). The boiler satises requests for both DHW and central heating (am-
bient frost protection function active).
In the HEATING ONLY mode, the display shows ( ). The boiler satises requests for central heating only (ambient frost
protection function active).
In the OFF mode, the display shows neither of the above two symbols (
) ( ). In this mode, only the ambient frost
protection function is active while requests for DHW and central heating are not satised.
6. FILLING THE SYSTEM
WARNING
Disconnect the boiler from the mains power supply using the two-pole switch.
IMPORTANT: Regularly check that the pressure displayed on the pressure gauge is 0.7 - 1.5 bar, with the boiler cold.
In case of overpressure, open the boiler drain tap. In case of insufcient temperature, open the boiler lling tap (gure 3).
Open the tap very slowly in order to vent the air.
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A: System emptying tap
B: Boiler emptying tap
C: System lling tap
D: Pressure gauge
Figure 2
The boiler is tted with a hydraulic pressure gauge which prevents the boiler from working if there is no water.
N.B.: In case pressure drops occur frequently, have the boiler checked by an authorised Service Engineer.
7. TURNING OFF THE BOILER
To turn off the boiler, disconnect the electric power supply. In “OFF” mode (section 5) the boiler remains off (the display
indicates OFF) though the electrical circuits remain live and the frost protection device is enabled (section 9).
8. GAS CONVERSION
The boilers can operate both on natural gas and LPG.
All gas conversions must be made by an authorised Service Engineer.
9. PROLONGED SHUTDOWN. FROST PROTECTION
Do not drain the whole system as lling up with water again causes unnecessary and harmful scale to build up inside the
boiler and the heating elements. If the boiler is not used during winter and is therefore exposed to the danger of frost, add
some specic anti-freeze to the water in the system (e.g.: propylene glycol coupled with corrosion and scale inhibitors).
The electronic boiler management system includes a “frost protection” function for the heating system which, when delivery
temperature falls below 5°C, operates the burner until a delivery temperature of 30°C is reached.
The frost protection function is enabled if:
* the boiler is electrically powered;
* the gas tap is open;
* the system is at the correct pressure;
* the boiler is not blocked.
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10. TROUBLESHOOTING
Faults are shown on the display with an error code (e.g.: E 01):
To RESET the boiler, press and hold down “R” for at
least 2 seconds. If this fault persists, call the Authorised
Service Centre.
0607_1205
N.B.: 5 reset attempts can be performed after which
the boiler shuts down. To reset again, switch off the
boiler for a few seconds.
RESETTABLE
faults
Figure 3
CODE
FAULT CORRECTIVE ACTION
DISPLAYED
Press and hold down “R” for at least 2 seconds. If this fault persists, call the
E01 Failed ignition shutdown
Authorised Service Centre.
Press and hold down “R” for at least 2 seconds. If this fault persists, call the
E02 Safety thermostat tripped
Authorised Service Centre.
Flue thermostat/ ue pressure
E03
Call the Authorised Service Centre.
switch tripped
Shutdown after 6 consecutive
Press and hold down “R” for at least 2 seconds. If this fault persists, call the
E04
ame losses
Authorised Service Centre.
E05 Flow sensor failure Call the Authorised Service Centre.
E06 DHW sensor fault Call the Authorised Service Centre.
Hydraulic pressure switch
Check that the pressure in the system is correct; See section 6. If this fault
E10
block
persists, call the Authorised Service Centre.
Probable blocked pump safety
E25/E26
Call the Authorised Service Centre.
trip
Press and hold down “R” for at least 2 seconds. If this fault persists, call the
E35 Parasite ame (ame error)
Authorised Service Centre.
Switching off due to reductions
E96
RESET is automatic. If this fault persists, call the Authorised Service Centre
in power supply
N.B.: in case of a fault, the display backlighting ashes together with the error code.
11. ROUTINE MAINTENANCE INSTRUCTIONS
To keep the boiler efcient and safe, have it checked by the authorised Service Centre at the end of every operating period.
Careful servicing ensures economical operation of the system.
Do not clean the outer casing of the appliance with abrasive, aggressive and/or easily ammable cleaners (e.g.: petrol,
alcohol, and so on). Always switch off the appliance before cleaning it (see section 7 Switching off the boiler).
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12. GENERAL INFORMATION
The following notes and instructions are addressed to tters to allow them to carry out trouble-free installation. Instructions
for igniting and using the boiler are contained in the ‘Instructions for Users’ section.
• This boiler can be connected to any type of double- or single-pipe convector plate, radiator or thermoconvector. Design
the system sections as usual, though, bearing in mind the available ow-head at the plate, as shown in section 25.
• Do not leave any packaging (plastic bags, polystyrene, etc.) within reach of children, as it is a potential source of danger.
• Initial lighting of the boiler must be carried out by an authorised Service Engineer, as indicated on the attached sheet.
Failure to observe the above will render the guarantee null and void.
ADDITIONAL PUMP WARNING
If an additional pump is used on the heating system, position it on the boiler return circuit. This will allow the correct
operation of the water pressure switch.
SOLAR WARNING
if the instantaneous (mixed) boiler is connected to a system with solar panels, the maximum temperature of the domestic
hot water entering the boiler must not exceed 60°C.
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13. INSTRUCTIONS PRIOR TO INSTALLATION
This boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure.
It must be connected to a central heating system and to a domestic hot water supply system according to its performance
and power output.
Do the following before connecting the boiler:
a) Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings
on the packaging and the rating plate on the appliance.
b) Make sure that the ue terminal draft is appropriate, that the terminal is not obstructed and that no exhaust gases
from other appliances are expelled through the same ue duct, unless the latter has been specially designed to collect
exhaust gas from more than one appliance, in compliance with current laws and regulations.
c) Make sure that, if the boiler is connected to existing ue ducts, these have been thoroughly cleaned as residual products
of combustion may detach from the walls during operation and obstruct the ow of fumes.
To ensure correct operation and maintain the warranty, observe the following precautions:
1. DHW circuit:
1.1. If the water is harder than 20 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser
or an equivalent treatment system, compliant with current regulations.
1.2. Thoroughly ush the system after installation of the appliance and before use.
1.3. The materials used for the product’s DHW circuit comply with Directive 98/83/CE.
2. Heating circuit
2.1. new system
Before proceeding with installation of the boiler, the system must be cleaned and ushed to eliminate residual
thread-cutting swarf, solder and any solvents, using suitable proprietary products. To avoid damaging metal, plastic
and rubber parts, only use neutral cleaners, i.e. non-acid and non alkaline. Recommended cleaning products are:
SENTINEL X300 or X400 and FERNOX Regenerator for heating circuits. Use these products in strict compliance
with the manufacturers’ instructions.
2.2. existing system:
Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suitable
proprietary products as described in section 2.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such
as SENTINEL X100 and FERNOX Protector for heating circuits. Use these products in strict compliance with the
manufacturers’ instructions.
Remember that the presence of foreign bodies in the heating system can adversely affect boiler operation (e.g.
overheating and excessive noise of the heat exchanger).
Failure to observe the above will render the warranty null and void.
13. INSTALLAZIONE DELLA CALDAIA 14. INSTALLING THE BOILER
After deciding the exact location of the boiler, make sure there is sufcient room to perform maintenance operations (at
least 450 mm of headroom is required in order to replace the expansion vessel).
Connect the system to the gas and water inlets present on the lower bar of the template. Fit two G3/4 taps (ow and
return) on the central heating circuit; these taps make it possible to carry out important operations on the system without
draining it completely. If you are either installing the boiler on an existing system or replacing one, as well as the above,
t a settling tank under the boiler on the system return line in order to collect any deposits and scale circulating in the
system after ushing. After xing the boiler to the template, connect the ue and air ducts, supplied as accessories, as
described in the following sections.
If the model
24 BIC
natural draught boiler is installed, connected it to the ue with a metal pipe resistant to normal me-
chanical stress, heat, products of combustion and relative condensate.
IMPORTANT
After lling the boiler, vent the entire internal circuit and the system as follows:
• close the gas on-off valve;
• power the boiler.
• open the vent valve on the pump body;
• press ( ) to set the boiler in the “WINTER” operating mode;
• send a heat demand from the room thermostat;
• open a hot water tap to alternate CH demand with DHW demand;
• after a few ignition attempts the boiler will shut down (error E01 appears on the display);
• to rest, press and hold down “R” for at least 2 seconds;
• repeat the procedure at least another two times;
• close the vent valve.
After venting the boiler circuit, proceed with initial lighting.
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EXPANSION VESSEL
The boiler features a standard 7.5-litre expansion vessel with a pre-charge pressure of 1 bar. The maximum volume of water in
the system is calculated according to hydrostatic pressure at an average water temperature of 80°C (ow: 95°C return: 75°C).
Hydrostatic pressure (m) 5 6 7 8 9 10
Maximum system volume (l) 138 131 119 107 97 87
Figure 4
WARNING
Tighten the boiler nipple water connections with care (maximum tightening torque 30 Nm).
G”3/4 HEATING FLOW G”1/2 DOMESTIC HOT WATER OUTLET
G”3/4 HEATING RETURN G”1/2 DOMESTIC COLD WATER INLET
G”3/4 GAS INLET TO BOILER
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14. DIMENSIONI CALDAIA 15. DIMENSIONS OF BOILER
24 BIC FF 24 BIC
CG_1848 / 1104_0702
CG_1848 / 1104_0703
Figure 5
16. INSTALLING THE FLUE AND AIR DUCTS
Model 24 BIC FF
The boiler is easy and exible to install thanks to the extensive range of available
accessories, as described below.
The boiler has been designed for connection to a vertical or horizontal coaxial
ue-air duct. A splitting kit is also available if separate ducts are required.
Only accessories supplied by the manufacturer must be used for installation!
WARNING: To optimise operating safety, make sure the flue ducts are firmly
fixed to the wall with suitable brackets.
… COAXIAL FLUE-AIR DUCT (CONCENTRIC)
This type of duct is used to discharge exhaust fumes and draw combustion air
both outside the building and if a LAS ue is tted.
The 90° coaxial curve allows the boiler to be connected to a ue-air duct in any
direction as it can be rotated by 360°. It can also be used as a supplementary
curve combined with a coaxial duct or a 45° curve.
Figure 6
If fumes are discharged outside the building, the ue-air duct must protrude
at least 18 mm from the wall to allow an aluminium weathering surround to be
tted and sealed to avoid water inltrations.
Make sure there is a minimum upward slope towards the outside of 1 cm per
metre of duct.
0805_2901 / CG_2073
•
A 90° curve reduces total duct length by 1 metre.
•
A 45° curve reduces total duct length by 0.5 metres.
Connector
The first 90° curve is not considered when calculating the maximum avai-
lable length.
Figure 7
Use of DIAPHRAGM
Boiler model Length (m)
on INLET LINE A
0,5 73
24 BIC FF
0,5 ÷ 2 80
2 ÷ 4 No
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16.1 HORIZONTAL FLUE INSTALLATION EXAMPLES
L max = 4 m (Ø 60/100 mm)
8 m (Ø 80/125 mm)
L max = 4 m (Ø 60/100 mm)
8 m (Ø 80/125 mm)
0512_2001
L max = 3 m (Ø 60/100 mm)
L max = 3 m (Ø 60/100 mm)
7 m (Ø 80/125 mm)
7 m (Ø 80/125 mm)
16.2 LAS FLUE DUCT INSTALLATION EXAMPLES C42 TYPE
0503_0907/CG1640
L max = 4 m (Ø 60/100 mm)
8 m (Ø 80/125 mm)
16.3 VERTICAL FLUE INSTALLATION EXAMPLES
This type of installation can be carried out on either a at or a pitched roof by tting a ue terminal and a special weathering
surround with sleeve (both available on request).
0503_0908/CG1641
L max = 10 m (Ø 80/125 mm)
L max = 8 m (Ø 80/125 mm)
L max = 9 m (Ø 80/125 mm)
For detailed installation instructions, consult the technical data provided with the accessories.
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… SEPARATE FLUE AND AIR DUCTS
This type of installation makes it possible to discharge exhaust fumes both outside the building and into single ue ducts.
Comburent air can be drawn in at a different location from that of the ue terminal. The splitting kit comprises a ue duct
adaptor (100/80) and an air duct adaptor. For the air duct adaptor, t the screws and seals previously removed from the cap.
Position
CO
%
2
Boiler model (L1+L2)
of air regulator
G20 G31
0 ÷ 20 1
24 BIC FF
6,1 8,7
20 ÷ 30 2
The first 90° curve is not considered when calculating the maximum available length.
The 90° curve allows the boiler to be connected to a ue-air duct in any direction as it can be rotated by 360°. It can also
be used as a supplementary curve combined with a duct or a 45° curve.
• A 90° curve reduces total duct length by 0.5 metres.
• A 45° curve reduces total duct length by 0.25 metres.
Adjusting the air regulator for separate flues
This regulator must be adjusted to optimise combustion efciency and parameters.
After turning the air intake connecter, which can be mounted both to the right and the left of the exhaust ue duct, suitably
adjust the excess air according to the total length of the combustion exhaust and inlet ue ducts.
Turn this regulator anticlockwise to decrease the excess of comburent air and vice-versa to increase it.
To ne tune, use a combustion product analyser to measure the amount of CO
in the fumes at maximum heat capacity,
2
and, if a lower value is measured, gradually adjust the air regulator until the amount of CO
indicated in the following table
2
is measured.
To mount this device correctly, consult the relative instructions.
connector
CG_1145 / 1104_0801
aperture
index
Figure 8
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16.4 DIMENSIONS OF SEPARATE OUTLETS
CG_2344 / 1103_3002
16.5 HORIZONTAL SEPARATE FLUE INSTALLATION EXAMPLES - C82
IMPORTANT -
Make sure there is a minimum downward slope towards the outside of 1 cm per metre of duct length.
In the event of installation of the condensate collection kit, the angle of the drain duct must be directed towards the boiler.
1010_0102/CG1643
CG_1643_FR / 1010_0101
L max = 10 m
(L1 + L2) max = 30 m
N.B.: For the C52 type, do not t the ue and air duct terminals on opposite walls of the building.
The inlet ue must have a maximum length of 10 metres for C52 fumes outlets.
If the discharge duct is longer than 6 metres, install the condensate collection kit, supplied as an accessory, near the boiler
IMPORTANT:
if tting a single ue duct, make sure it is adequately insulated (e.g.: with glass wool) wherever the duct
passes through building walls. For detailed installation instructions, consult the technical data provided with the accessories.
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17. ELECTRICAL CONNECTIONS
This machine is only electrically safe if it is correctly connected to an efcient earth system in compliance with current
safety regulations.
Connect the boiler to a 230V single-phase earthed power supply using the supplied three-pin cable, observing correct
LIVE-NEUTRAL polarity.
Use a double-pole switch with a contact separation of at least 3 mm. When replacing the power supply cable, t a
2
harmonised HAR H05 VV-F’ 3x0.75mm
cable with a maximum diameter of 8 mm.
…Access to the power supply terminal block
• disconnect the boiler from the mains power supply using the two-pole switch;
• remove the two screws xing the control panel to the boiler;
• rotate the control panel;
• remove the cover and access the wiring area (gure 9).
The 2A fast-blowing fuse is incorporated in the power supply terminal block (to check and/or replace the fuse, pull out
the black fuse carrier).
IMPORTANT: respect polarity L (LIVE) -N (NEUTRAL).
(L) = Live (brown)
(N) = Neutral (blue)
= Earth (yellow-green)
(1) (2) = Contact for room thermostat
CG_1853 / 1103_2302
Figure 9
18. CONNECTING THE ROOM THERMOSTAT
• Access the power supply terminal block (gure 9) as described in the previous section;
• remove the jumper on terminals (1) and (2);
• thread the two-wire cable through the grommet and connect it to these two terminals.
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19. GAS CONVERSION
The authorised Technical Assistance Service can convert this boiler to natural gas (G. 20) or liquid gas (G.31).
Carry out the following operations:
A) replace the nozzles of the main burner and the gas diaphragm (if tted);
B) new max. and min. calibration of the pressure regulator.
A) Replace the burner nozzles
• carefully pull the main burner off its seat;
• replace the main burner nozzles making sure to fully tighten them to prevent gas leaks. Nozzle diameters are specied
in table 2.
• replace the gas membrane located on the gas valve (gure 10). The diameter of the membrane is specied in table 2.
Attention: it is not necessary to change parameter F02.
B) Calibrate the pressure regulator
• connect the positive pressure test point of a differential pressure gauge (possibly water-operated) to the gas valve
pressure test point (Pb) (Figure 10). Only for models with sealed chambers, connect the negative pressure test point of
the manometer to a “T” tting in order to join the boiler adjustment outlet, the gas valve adjusting outlet (Pc) and the
pressure gauge. (The same measurement can be made by connecting the pressure gauge to the pressure test point
(Pb) after removing the front panel of the sealed chamber);
Measuring burner pressure using methods other than those described could lead to incorrect results as the low pressure
created by the fan in the sealed chamber would not be taken into account.
B1) Adjustment to nominal heat output:
• open the gas tap and switch the boiler to the Winter mode;
• take the boiler to maximum power as described in section 19.1;
• remove the modulator cover;
• adjust the tube brass screw (a) until the pressure values shown in table 1 are obtained;
• make sure that the dynamic inlet pressure of the boiler, measured at the gas valve pressure test point (Pa) (Figure 10)
is correct (37 mbar for propane or 20 mbar for natural gas).
B2) Adjustment to reduced heat output:
• disconnect the modulator power cable and unscrew the screw (b) until a pressure value corresponding to reduced heat
output is achieved (see tab. 1);
• reconnect the cable;
• mount the modulator cover and seal.
B3) Final checks
• attach the additional plate supplied with the transformer, specifying the type of gas and the calibration performed.
gas valve
mod. SIGMA 845
a
0605_1502
CG_2347 / 1104_0406
gas diaphragm
Figure 10
b
Figure 11
ATTENTION
If the natural gas inlet pressure is too low (less than 17 mbar) remove the gas diaphragm installed over the gas valve (g.
10) and set parameter F02=00 on the electronic board (§21).
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19.1 GAS VALVE CALIBRATION FUNCTION
To simplify calibration of the gas valve, the calibration function may be set directly
on the boiler control panel as follows:
a)
hold down the buttons and together for at least 6 seconds;
b) after about 6 seconds, the symbols ash;
c) the display shows, at intervals of one second, “100” and the flow temperature.
0805_2302 / 1002_1201
In this phase, the boiler works at the maximum heating output (100%).
d) press +/- to immediately set the power of the boiler (100% or 0%);
e) adjust the “Pmax/Pmin” screw (gure 10) to set the burner pressure value as
described in table 1.
To adjust pressure at maximum power, turn the “Pmax” screw (g. 10) clockwise
to increase or anti-clockwise to decrease pressure at the burner.
To adjust pressure at minimum power, turn the “Pmin” screw (g. 10) clockwise
to increase or anti-clockwise to decrease pressure at the burner.
f)
press +/- to gradually set the desired power level (interval = 1%).
Press the button to leave the function.
Note:
The function is automatically deactivated after a period of 15 minutes, at the end of which the electronic board returns to
its operating status prior to the activation of the function or prior to reaching the set maximum temperature.
Table of burner nozzles
24 BIC FF 24 BIC
gas type G20 G31 G20 G31
diameter of nozzles (mm) 1,18 0,69 1,18 0,69
Burner pressure (mbar*)
1,7 6,9 1,6 6,6
REDUCED HEAT OUTPUT
Burner pressure (mbar*)
7,8 24,7 7,5 18,1
RATED HEAT OUTPUT
Diameter of gas diaphragm (mm) 4,2 3,5 4,2 3,5
N° nozzles 18
Table 1
Consumption 15°C-1013 mbar
24 BIC FF - 24 BIC
G20 G31
3
Rated power
2,73 m
/h 2,00 kg/h
3
Reduced power
1,26 m
/h 0,92 kg/h
3
p.c.i.
34,02 MJ/m
46,34 MJ/kg
Table 2
* 1 mbar = 10,197 mmH
O
2
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20. VISUALISATION OF PARAMETERS ON THE DISPLAY (“INFO” FUNCTION)
Press “i” for at least 5 seconds to visualise certain boiler information on the display on the front panel of the boiler.
N.B: when the “INFO” function is enabled, the message “A00”, alternating with the boiler delivery temperature,
is shown on the display (figure 12):
0605_2204 / CG_1808
Figure 12
Press buttons (+/-) to display the following information:
•
A00: current DHW temperature (°C);
A01: current external temperature (°C) (with external sensor connected);
A02: modulation current value (100% = 310 mA);
A03: power range (%) (MAX R);
A04: heating setpoint temperature (°C) - - If the external sensor is connected, the value of the “kt” curve is displayed
(section 26);
A05: current heating delivery temperature (°C);
A06: DHW temperature setpoint (°C);
A07: — — ;
A08: value (l/minx10) of the DHW ow rate;
A09: last error that occurred in the boiler.
This function remains active for 3 minutes. It is possible to interrupt the “INFO” function in advance by pressing button
•
(i) for at least 5 seconds, or turning off the power to the boiler.
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21. PARAMETER SETTINGS
To set the boiler parameters, press (– ) and (– ) together and hold down for at least 6 seconds. When the function is
activate, the “F01” appears on the display alternating with the value of the parameter shown.
Edit parameters
• Press (+/– ) to scroll through the parameters;
• Press (+/– ) to edit each parameter;
• Press ( ), to save the changes. “MEM” appears on the display;
• Press (i), to exit without saving. “ESC” appears on the display.
Factory settings
Description of parameters
24 BIC FF 24 BIC
Type of boiler
F01
10 20
10 = sealed chamber 20 = atmospheric chamber
Gas used
00 = METHANE
F02
02
01 = LPG
02 = METHANE (WITH DIAPHRAGM)
F03
Hydraulic system 15
Setting programmable relay 1 (See SERVICE instructions)
00 = no associated function
01 = condominium alarm
F04
02 = ambient fan
04
03 = not used
04 = zone pump controlled by room thermostat (230V)
05 = not used
F05
Setting programmable relay 2 (
DHW pump
)
03
Maximum CH setpoint (°C)
F06
00
00 = 85°C - 01 = 45°C (function unavailable)
F07
DHW inlet priority conguration
00
F08
CH max. output (0-100%)
100
F09
DHW max. output (0-100%)
100
F10
Min. heating output (0-100%)
00
Delay prior to new ignition in CH mode
F11
03
(00-10 minutes) - 00=10 seconds
F12
Diagnostics (See SERVICE Instructions)
--
F13-F14-F15
Factory settings (no change) 00
Anti-legionella function
F16
00 = disabled
00
55...67 = enabled (setpoint °C)
CH pressure sensor selection
F17
00 = hydraulic pressure sensor
00
01 = hydraulic differential pressure sensor
F18
Manufacture information
00
22. ADJUSTMENT AND SAFETY DEVICES
The boiler has been designed in full compliance with European reference standards and in particular is tted with the
following:
• Air pressure switch (model 24 BIC FF)
This device only allows the burner to ignite if the exhaust ue duct is in perfect working order.
In the event of one or more of the following faults:
• ue terminal obstructed
• venturi tubes obstructed
• fan blocked
• venturi tube connection - pressure switch tripped
the boiler remains on standby and error code E03 is displayed (see table in section 10).
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• Fumes thermostat (model 24 BIC)
This device has a sensor positioned on the left section of the fumes hood and shuts off the gas ow to the main burner
if the ue is obstructed and/or if there is no draught.
In these conditions the boiler shuts down and displays error code E03 (section 10).
After eliminating the problem, press button ( ), for at least 2 seconds to re-ignite immediately.
It is forbidden to disable this safety device
• Safety thermostat
Thanks to a sensor placed on the CH ow line, this thermostat interrupts the ow of gas to the burner if the water in
the primary circuit overheats. In these conditions, the boiler is blocked and only after the fault has been eliminated can
it be ignited again by pressing ( ), for at least 2 seconds.
It is forbidden to disenable this safety device
• Flame ionization detector
The ame sensing electrode, located on the right-hand side of the burner, guarantees safety of operation in case of gas
failure or incomplete ignition of the burner.
In these conditions, the boiler is blocked after 3 ignition attempts.
Press ( ), for at least 2 seconds to re-establish normal operating conditions.
• Hydraulic pressure switch
This device allows the main burner to be ignited only if system pressure is higher than 0.5 bars.
• Pump overrun for heating circuit
The electronically-controlled pump post-circulation function lasts 180 seconds and is enabled, in the heating mode, if
the ambient thermostat causes the burner to go out.
• Pump overrun for DHW circuit
The electronically-controlled pump post-circulation function lasts 30 seconds and is enabled, in the DHW mode, if the
probe causes the burner to go out.
• Frost protection device (CH and DHW systems)
The electronic boiler management system includes a “frost protection” function for the heating system which, when
delivery temperature falls below 5°C, operates the burner until a delivery temperature of 30°C is reached.
This function is enabled when the boiler is switched on, the gas supply is open and the system is correctly pressurised.
• Water not circulating in primary circuit (pump probably blocked)
If there is insufcient or no water circulating in the primary circuit, the boiler blocks and the error code E25 is shown on
the display (section 10).
• Anti-block pump function
If no heat demand is received for 24 consecutive hours, in the heating mode, the pump will automatically start and
operate for 10 seconds. This function is operative when the boiler is powered.
• Three-way valve anti-blockage function
If no heat demand is received for a period of 24 hours, the three-way valve performs a complete switching cycle. This
function is operative when the boiler is powered.
• Hydraulic safety valve (heating circuit)
This device is set to 3 bar and is used for the heating circuit
.
Connect the safety valve to a drain trap. Do not use it to drain the heating circuit.
N.B.: domestic hot water is guaranteed even if the NTC sensor develops a fault. In this case, temperature is controlled
by the delivery sensor.
INSTALLATION INSTRUCTIONS
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77
23. POSITIONING THE IGNITION AND FLAME-SENSING ELECTRODE
9912070100
Figure 13
24. CHECKING COMBUSTION PARAMETERS
To measure combustion efciency and the toxicity of the products of combustion, the boiler is tted with two dedicated
test points.
One connection point is connected to the exhaust duct and is used to measure combustion efciency and the toxicity of
the products of combustion.
The other is connected to the air intake circuit and is used to check for the presence of any products of combustion
circu¬lating in installations with co-axial ues.
The following parameters can be measured using the test point connected to the exhaust duct:
• temperature of the products of combustion;
• concentration of oxygen (O
) or, alternatively, carbon dioxide (CO
);
2
2
• concentration of carbon monoxide (CO).
The temperature of the comburent air must be measured on the test point located on the air intake ue by inserting the
measurement sensor by about 3 cm.
N.B.: to regulate the rated power, see chapter 19 (B1)
For natural draught boiler models, a hole must be made in the exhaust ue at a distance from the boiler equal to twice
the internal diameter of the ue.
The following parameters can be measured through this hole:
• temperature of the products of combustion;
• concentration of oxygen (O
) or, alternatively, carbon dioxide (CO
);
2
2
• concentration of carbon monoxide (CO).
The temperature of the combustion air must be measured close to the point where the air enters the boiler. The hole,
which must be made by the person in charge of the system during commissioning, must be sealed so as to ensure that
the exhaust duct is airtight during normal operation
.
25. PUMP CAPACITY/ HEAD
A high static head pump (GRUN-
DFOS UPSO 15-50), suitable for
installation on any type of single- or
1103_0901
double-pipe heating system, is used.
The automatic air valve incorporated
in the pump allows quick venting of
O
2
the heating system.
HEAD mH
Graph 1
FLOW l/h
INSTALLATION INSTRUCTIONS
71.06199.02 - EN
78
26. CONNECTING THE EXTERNAL SENSOR
The wiring harness leaving the control board includes two RED wires tted with faston covers. Connect the external sensor
to these two wires.
With the external sensor connected, the “kt” curve (Graph 2) can be changed by pressing
+/- .
N.B.: In case of installation in an average living unit (good perimeter insulation and radiator systems), set the “kt” climate
curve to “25”.
TM
“kt” curves
1012_0501
TM = Flow temperature range
Te
Graph 2
Te = External temperature
27. DHW EXPANSION VESSEL (AVAILABLE ON REQUEST)
DHW expansion vessel kit comprising:
- 1 stainless steel expansion vessel;
- 1 support for expansion vessel;
- 1 nipple G1/2”;
- 1 lock nut;
- 1 connection hose.
Connect the hose (supplied as an accessory in the expansion vessel kit) to the two connectors A and B as shown in gure.
The DHW expansion vessel should be mounted if:
- the pressure of the water supply or lifting system is such as to require the installation of a pressure reducer (pressure
higher than 4 bar)
- a non-return valve is tted to the water supply line
- the water supply network is insufcient for the expansion of the water contained in the storage boiler and it is necessary
to use the DHW expansion vessel.
INSTALLATION INSTRUCTIONS
71.06199.02 - EN
79
TIPS
For the efcient operation of the expansion vessel, the pressure of the water supply must be lower than 4 bar. If it is not,
install a pressure reducer. Adjust the pressure reducer to obtain a water supply pressure less than 4 bar.
28. ANNUAL SERVICE
To optimise boiler efciency, carry out the following annual controls:
• check the appearance and air-tightness of the gaskets of the gas and combustion circuits;
• check the state and correct position of the ignition and ame-sensing electrodes;
• check the state of the burner and make sure it is rmly xed;
• check for any impurities inside the combustion chamber.
Use a vacuum cleaner to do this;
• check the gas valve is correctly calibrated;
• check the pressure of the heating system;
• check the pressure of the expansion vessel;
• check the fan works correctly;
• make sure the ue and air ducts are unobstructed.
• check the state of the boiler anode.
WARNINGS
Before commencing any maintenance operations, make sure the boiler is disconnected from the power supply.
Afterwards, move the knobs and/or operating parameters of the boiler to their original positions.
29. DRAINING THE BOILER CIRCUIT AND THE STORAGE BOILER
DRAINING THE BOILER CIRCUIT
Drain the boiler by opening the tap in the hydraulic assembly.
To drain the boiler using the drain tap located at the bottom, proceed as follows (g. 14):
- close the boiler on/off valves;
- open the drain tap using an 8 mm hex wrench;
- drain the boiler;
- close the drain tap using the 8 mm hex wrench.
Figure 14
INSTALLATION INSTRUCTIONS
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