DeDietrich WHE 2.24 User manual

WHE 2.24 / WHE 2.24 FF
Wall-hung gas boilers
User Guide
300011777-001-C
EN

2WHE 2.24 / WHE 2.24 FF 17/07/2008 - 300011777-001-C
.
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2.3 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 Safety instructions and recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.1.1 WHE 2.24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.1.2 WHE 2.24 FF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.2 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4 Operating the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.1 Meaning of the lights (normal operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.2 Changing the settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.2.1 Summer/winter setting / Heating temperature setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.2.2 Setting the domestic hot water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.3 Stopping the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3.1 Switching off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3.2 Antifreeze protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3.3 Cleaning the pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3.4 Precautions to take if there is a danger of frost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3.5 Precautions to take in the event of prolonged shutdown (one year or more). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.4 Restart of the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
5 Checking and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6.1 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6.2 Incidents and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
7 Technical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

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17/07/2008 - 300011777-001-C WHE 2.24 / WHE 2.24 FF
1. Introduction
1Introduction
1.1 Symbols used
Caution danger
Risk of injury and damage to equipment. Attention must be
paid to the warnings on safety of persons and equipment.
Specific information
Information must be kept in mind to maintain comfort.
ZReference
Refer to another manual or other pages in this instruction
manual.
DHW: Domestic hot water
1.2 General
1.2.1 Manufacturer's liability
De Dietrich Thermique S.A.S manufactures products in compliance
with the standard 1. Products are delivered with 1marking and
all documents required.
In the interest of customers, De Dietrich Thermique S.A.S are
continuously endeavouring to make improvements in product quality.
All the specifications stated in this document are therefore subject to
change without notice.
The liability of De Dietrich Thermique S.A.S as the manufacturer
may not be invoked in the following cases:
`Incorrect use of the appliance.
`Faulty or insufficient maintenance of the appliance.
`Incorrect installation of the appliance.
1.2.2 Installer's liability
The installer is responsible for the installation and inital start up of the
appliance. The installer must respect the following instructions:
`Read and follow the instructions given in the manuals provided
with the appliance.
`Carry out installation in compliance with the prevailing
legislation and standards.
`Perform the initial start up and carry out any checks necessary.
`Explain the installation to the user.
`Warn the user of the obligation to check the appliance and
maintain it in good working order.
`Give all the instruction manuals to the user.
1.2.3 User's liability
To guarantee optimum operation of the appliance, the user must
respect the following instructions:
`Read and abide by the instructions given in the user manual.
`Call on qualified professionals to carry out installation and initial
start up.
`Get your fitter to explain your installation to you.
`Have the required checks and services done.
`Keep the instruction manuals in good condition close to the
appliance.

4WHE 2.24 / WHE 2.24 FF 17/07/2008 - 300011777-001-C
2. Safety instructions and recommendations
2 Safety instructions and recommendations
2.1 Safety instructions
Fire hazard
Do not stock products of an inflammable nature close to
the appliance.
If you smell gas, do not use a naked flame, do not smoke,
do not operate electrical contacts or switches (doorbell,
lights, motor, lift, etc.).
1.Cut the gas supply
2.Open the windows
3.Extinguish all flames
4.Evacuate the premises
5.Contact a qualified professional
6.Inform the gas supplier
Risk of intoxication
Do not obstruct the air inlets in the room (even partially).
If you smell flue gases
1.Switch the appliance off
2.Open the windows
3.Evacuate the premises
4.Contact a qualified professional
Risk of being burnt
Avoid direct contact with the flame viewport.
Depending on the settings of the appliance:
- The temperature of the flue gas conduits may exceed 60°C
- The temperature of the radiators may reach 95°C
- The temperature of the domestic hot water may reach 65°C
Risk of damage
Do not stock chloride or fluoride compounds close to the
appliance.
Install the appliance in frost-free premises.
Do not neglect to service the appliance: Contact a qualified
professional or take out a maintenance contract for the annual
servicing of the appliance.
2.2 Recommendations
Warning
Only qualified professionals are authorised to work on the
appliance and the instalation.
Warning
`Before any work, switch off the mains supply to the appliance.
`Before any work, close the main gas valve.
`Check regularly that the installation contains water and is
pressurised.
`Keep the appliance accessible at all times.
`Avoid draining the installation.
`Use only original spare parts.
`Never remove or cover labels and rating plates affixed to the
appliance.
`The appliance should be on Summer or Antrifreeze mode rather
than switched off to guarantee the following functions:
- Cleaning the pumps
- Antifreeze protection
- Protection against corrosion on domestic hot water tanks fitted
with a titanium anode

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17/07/2008 - 300011777-001-C WHE 2.24 / WHE 2.24 FF
3. Description
3 Description
3.1 General description
3.1.1 WHE 2.24
- Wall-hung gas boiler
- Central heating and instant domestic hot water production
- Wide modulation range (8.4 to 24 kW)
- High efficiency ( 1)
- Stainless steel atmospheric burner
- Main exchanger in copper with protective zinc layer which enables
very high combustion efficiency
- Simple, functional control panel
- Integrated troubleshooting system
- Flow limiter (DHW): 10 l/mim.
- Expansion vessel: 8 l
- Automatic air vent
- Accelerator pump
- Low water safety device
- By-pass
- Filling and emptying tap
- Thermo-pressure gauge
- Assembly template delivered with the boiler
- Flue gas temperature sensor
- Connecting to a chimney
- Silent running
3.1.2 WHE 2.24 FF
- Wall-hung gas boiler
- Central heating and instant domestic hot water production
- Wide modulation range (8.4 to 23.6 kW)
- High efficiency ( 1)
- Stainless steel atmospheric burner
- Main exchanger in copper with protective zinc layer which enables
very high combustion efficiency
- Simple, functional control panel
- Integrated troubleshooting system
- Flow limiter (DHW): 10 l/mim.
- Expansion vessel: 8 l
- Automatic air vent
- Accelerator pump
- Low water safety device
- By-pass
- Filling and emptying tap
- Thermo-pressure gauge
- Assembly template delivered with the boiler
- Differential air pressure switch
- Combustion gas extraction fan
- Connection to a concentric air inlet and combustion products
discharge conduit:
- Horizontal forced flue - type C
12
connection
- Vertical forced flue - type
C
32
connection
- Leakproof collective conduit - type
C
42
connection
- Separate ducts - type
C
52
connection
- Silent running

6WHE 2.24 / WHE 2.24 FF 17/07/2008 - 300011777-001-C
3. Description
3.2 Control panel
1. :ON/OFF light (1)
2. / : No flame or thermostat activation light (1)
3. / : Flame present or sweeping mode activation light (1)
4. / : "Heating" or "domestic hot water" ON light (1)
5. "Chimney sweep" button (Sweeping mode)
6. Thermometer (Heating circuit temperature)
7. Pressure gauge (Pressure in the heating circuit)
8. domestic hot water thermostat (35 to 60 °C)
9. Boiler thermostat (35 to 80 °C)
"SUMMER" position / "WINTER" position
10. Main ON/OFF switch
11. Not used
12. Unlock button (reset)
13. "Fitter" button (Setting the boiler parameters)
The button can be locked by turning it 45°
(1) The lights may have 6 different signals
For the meanings of the various combinations, see the following
chapters:
- Meaning of the lights (normal operation) - Page: 7
- Error messages - Page: 10
On
Off
Flashing slowly On: 0.75 s
Off: 0.75 s
Flashing rapidly On: 0.10 s
Off: 0.40 s
Flashing on modification On: 0.75 s
Off: 0.25 s
Flashing on update
(2 flashes)
On: 0.15 s
Off: 0.15 s

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17/07/2008 - 300011777-001-C WHE 2.24 / WHE 2.24 FF
4. Operating the appliance
4 Operating the appliance
4.1 Meaning of the lights (normal operation)
4.2 Changing the settings
4.2.1 Summer/winter setting / Heating temperature setting
Set the boiler thermostat to %or ..
.: 35 to 80 °C
Set the boiler thermostat to the desired setting.
Heating and domestic hot water are in operation
%: Min position
Only domestic hot water is in operation
4.2.2 Setting the domestic hot water temperature
35 to 60 °C
Set the DHW thermostat to the desired setting.
Light 1 Light 2
/
Light 3
/
Light 4
/
Off Off Off Off Boiler off
On Off Off Off Boiler on standby
Flashing rapidly Off Off Off Anti-short cycle activated (Only in heating mode)
On Off On On Heating mode
On Off On Flashing rapidly Domestic hot water mode
Off Flashing rapidly Flashing rapidly Off Operating at maximum output
Flashing rapidly Off Flashing rapidly Off Operating at minimum output

8WHE 2.24 / WHE 2.24 FF 17/07/2008 - 300011777-001-C
4. Operating the appliance
4.3 Stopping the boiler
4.3.1 Switching off
Set the On/Off switch to {.A boiler which is switched off is not protected against frost.
The control panel should always be switched on to take
advantage of the heating pump anti-sticking function
4.3.2 Antifreeze protection
Leave the boiler on standby:
- Turn the boiler thermostat to Min.
- Turn the domestic hot water thermostat to Min.
The pumps start up when the temperature falls below 8°C.
The pumps and the burner start up when the temperature falls below
6°C.
4.3.3 Cleaning the pumps
Leave the boiler on standby:
- Turn the boiler thermostat to Min.
- Turn the domestic hot water thermostat to Min.
The pumps operate for 5 seconds if they have been inactive for more
than 24 hours.
4.3.4 Precautions to take if there is a danger of frost
Heating circuit:
Use a correctly dosed antifreeze to prevent the heating water
freezing. If this cannot be done, drain the system completely. In all
cases, consult the fitter.
Domestic hot water circuit:
Drain the domestic water tank and pipes.
4.3.5 Precautions to take in the event of prolonged shutdown (one year or more)
- Close the gas valve
- The boiler and the chimney must be swept carefully.
- Close the door of the boiler to prevent the internal circulation of air.

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17/07/2008 - 300011777-001-C WHE 2.24 / WHE 2.24 FF
4. Operating the appliance
4.4 Restart of the boiler
Initial commissioning must be done by a qualified
professional.
1. Open the gas valve.
2. Set the boiler thermostat to the desired setting.
3. When preparing domestic hot water: Set the DHW thermostat to
the desired setting.
4. Set the On/Off switch to z.
If the flame is not detected, the boiler tries to ignite 4 more times
before going into safety shutdown.
5 Checking and maintenance
Make the following checks at least 1 time a year:
- Safety devices
- Water level
- Checking burner safety
- Checking the gas inlet
Carry out the following maintenance at least 1 time a year:
- Principal exchanger
- Plate exchanger
- Burner
- Cleaning the "cold water" filter
- Cleaning painted surfaces
Ignition cycle
Light 1 Light 2
/
Light 3
/
Light 4
/
1. Operational test for a few seconds Flashing rapidly Off Off Off
2. Test successful, the boiler is on standby On Off Off Off
3. When heating is required, the ignition
sequence starts up On Off On On

10 WHE 2.24 / WHE 2.24 FF 17/07/2008 - 300011777-001-C
6. Troubleshooting
6 Troubleshooting
Before informing the fitter of a fault, make a note of the following
information:
- Type of gas used
- Boiler type
- Date of manufacture
- Year (01 = 2001, 02 = 2002, ...)
- Week
- Serial no. of the appliance
6.1 Error messages
Errors are signalled by the 4 lights on the control panel.
Light 1 Light 2
/
Light 3
/
Light 4
/
Flashing rapidly Flashing rapidly Flashing rapidly Flashing rapidly
Communication error :
Communication error
between the safety
control box and the PCB
Check the cable between the safety control box and
the PCB.
Press the Reset button for 2 seconds.
If the problem persists, contact the fitter.
Off Off Off Off The boiler does not
start up: No current Check the electrical connections.
Off On Off Off
No flame detected
after 5 ignition
attempts
Press the Reset button for 2 seconds
If the problem persists, contact the fitter.
Flashing rapidly On Off Off
Fault temperature
sensor heating outlet:
The sensor circuit has
been broken or short
circuited
First check that the water is circulating in the boiler
(water pressure in the heating circuit, flow and return
valves open, valves and radiators open, etc.).
If the problem persists, contact the fitter.
Off On Flashing rapidly Off
Domestic hot water
outlet sensor fault: The
sensor circuit has been
broken or short circuited
First check that the water is circulating in the boiler
(water pressure in the heating circuit, flow and return
valves open, valves and radiators open, etc.).
If the problem persists, contact the fitter.
Off Flashing rapidly Off Off Thermostat activation:
Safety thermostat open
Check the fresh air inlet and flue gas discharge ducts
(or the forced flue).
Press the Reset button for 2 seconds.
If the problem persists, contact the fitter.
Off On Off Flashing rapidly
WHE 2.24
Flue gas temperature
sensor error:
- Insufficient draught
- The sensor circuit has
been broken or short
circuited
Check for adequate draw on the chimney
connection.
The boiler is in safety shutdown until the flue gas
temperature sensor is again operational. Wait 15
minutes.
If the problem persists, contact the fitter.
WHE 2.24 FF
Air pressure error:
Insufficient draught
Check the fresh air inlet and flue gas discharge ducts
(or the forced flue).
Press the Reset button for 2 seconds.
If the problem persists, contact the fitter.
Off On Flashing rapidly Flashing rapidly The water level and/or
pressure are too low
First check that the water is circulating in the boiler
(water pressure in the heating circuit, flow and return
valves open, valves and radiators open, etc.).
Top up the heating circuit with water.
Carry out a visual check for the presence of any
water leaks.