City 2.24/II Chimney - Chauffe-eau & chaudière DE DIETRICH - Free user manual and instructions

Product Type	Condensing Combi Boiler
Brand	De Dietrich
Model	City 2.24/II Chimney
Energy Source	Natural Gas (convertible to LPG)
Heating Output (max)	23.8 kW
DHW Output (max)	24 kW
Flue Type	Conventional chimney (type B23)
Dimensions (H x W x D)	700 x 400 x 300 mm
Weight (empty)	30 kg
Electrical Supply	230 V / 50 Hz
Rated Power Consumption	120 W
Primary Heat Exchanger	Stainless steel
DHW Heat Exchanger	Brazed plate heat exchanger
Expansion Vessel Capacity	8 L
Heating Temperature Range	30 - 80 °C
DHW Temperature Range	35 - 65 °C
Efficiency (at 60°C/30°C)	Up to 93% (condensing)
Control Interface	Electronic with LCD display
Safety Features	Overheat protection, frost protection, pump anti-blocking
Noise Level	< 50 dB(A)
Maintenance	Annual service required; easily accessible components
Spare Parts Availability	Available through De Dietrich distributors for at least 10 years
Reparability	Modular design with replaceable parts
Warranty	2 years (extendable)

Frequently Asked Questions - City 2.24/II Chimney DE DIETRICH

How do I reset my De Dietrich City 2.24/II Chimney boiler after a lockout?

Press and hold the reset button on the control panel for 3-5 seconds. If the lockout persists, check for low gas pressure or blocked flue and contact a qualified engineer.

Why is the boiler pressure dropping frequently?

A regularly dropping pressure indicates a leak in the heating system or a faulty expansion vessel. Repressurise to 1-1.5 bar when cold and have the system inspected.

What does the E01 error code mean on my boiler?

Error E01 typically indicates a flame detection failure. Check that the gas supply is on and the ignition electrode is clean. If the problem continues, call a service technician.

How do I adjust the hot water temperature?

Turn the DHW temperature dial on the control panel to your desired setting (between 35-65 °C). For maximum comfort, set between 45-55 °C.

Can I use the boiler without a chimney?

No, this model is designed for a conventional chimney flue (type B23). It must be connected to an adequately sized, unobstructed chimney. Do not use in a balanced flue configuration.

Why is the heating not working but hot water is fine?

This could be due to a faulty diverter valve or a thermostat issue. Check if the room thermostat is calling for heat and that the heating mode is selected.

How often should I service my boiler?

An annual service by a Gas Safe registered engineer is recommended to ensure safe and efficient operation, and to maintain the warranty.

What is the difference between winter and summer mode?

In winter mode, the boiler provides both heating and hot water. In summer mode, only hot water is produced. Use the mode selector on the control panel to switch.

How do I bleed my radiators?

Turn off the heating, allow radiators to cool, then use a radiator key to open the bleed valve until air escapes and water appears. Close the valve and check boiler pressure.

Where can I find spare parts for this model?

Spare parts can be ordered from De Dietrich authorized distributors or through their online portal. Use the heating model number City 2.24/II Chimney when ordering.

USER MANUAL City 2.24/II Chimney DE DIETRICH

City 1.24/II Chimney and VMC - City 1.24/II FF

City 2.24/II Chimney and VMC - City 2.24/II FF - City 2.28 FF

City 3.24/II Chimney - City 3.24/II FF

City 24 BIC/II - City 24 BIC/II FF

City Condens 1.24, 2.24, 3.24

Wall-hung gas boilers

English

31/08/05

Instructions for

use

C€

Thanks

Congratulations on choosing a DE DIETRICH product, a product of quality. We strongly recommend that you read the following instructions in order to guarantee the optimal operation of your appliance. We are sure that you will not be disappointed and that it will satisfy all of your expectations.

Recommendations

For a proper operating of the boiler, follow carefully the instructions.

The installation and the first start-up must be performed by a qualified professional. Any work on the gas valve unit is authorised only if carried out by a qualified professional.

Aeration

France: the cross section of the aeration vent, which is compulsory in the premises in which the boiler is installed, must comply with the DTU 61.1 (P 45 204) standard and, in particular, with the instruction on general improvement work (Book 1764 April 1982).

The air inlet into the premises must in no event be obstructed, even partially.

Maintenance

The servicing and cleaning of the boiler and the sweeping of the flue gas pipe and the bleed pot must be done at least once a year by a qualified professional. We recommend that you take out a maintenance contract.

Precautions against frost

The boiler is fitted with an antifreeze system. In the event of total shutdown of the heating in winter which may lead to the danger of freezing (switching off of radiators and current), we recommend using a correctly dosed anti-freeze product to stop the heating water freezing. Failing this, drain the installation completely (in all cases, consult your fitter).

Control panel (City 1.24/II, 2.24/II, 3.24/II, 24 BIC/II)

A Temperature display

B Domestic hot water temperature maintenance override button

C Safety shutdown light

D Unlock button

E "Chimney sweep" button

F "Fitter" button

G 3-position switch

H "Heating" on light

I Heating temperature setting

J Flame presence light
K Setting the domestic water temperature
L "Domestic hot water" on light
M Pressure indicator

• Check that the boiler is connected to the electricity.
• Open the gas valve (See next page).

G : Switch

Turn the switch to the desired operating mode :

✿ : Boiler stopped (with antifreeze protection)

☐ : Boiler in use : Heating; production of domestic hot water * (recommended mode)

☐ : Boiler in use : production of domestic hot water Only *

I: Setting button

Adjust the heating water temperature

• Stop to the left := 40 °C
• Hard point := 75 °C
• Stop to the right := 90 °C

K : Setting button \*

Adjust the domestic hot water temperature

• Stop to the left := 40 °C
• Hard point := 53°C to 55 °C depending on the model
• Stop to the right := 58°C to 60°C depending on the model

B : Domestic hot water temperature maintenance override button

For City with Easymatic or Easyradio control unit

Pressing for 1 second in summer or summer/winter mode overrides loading of the domestic hot water tank or of the primary storage tank outside the time slot programmed on the control unit up to midnight (indicator light B2 flash)

Light B1 lit : The burner is ignited to reheat the domestic hot water tank (or primary storage tank)

Light B2 off : No override or programme running

Light B2 lit : Comfort programme activated

For City without control unit

Light B1 lit : The burner is ignited to reheat the domestic hot water tank (or primary storage tank)

A power cut does not modify the selected operating mode.

D : Unlock button

If the boiler has locked itself out (warning light C lit), press button D to re-ignite it. If a 2nd reset turns out to be necessary and remains unsuccessful, consult your fitter.

M : Pressure indicator

Displays the pressure in the heating circuit from 0.5 to 2.5 bar. If the red warming light (0.5 bar) is lit, top up with water using the filling system (disconnector, consult your fitter (See next page).

E and F : "Chimney sweep" button and "Fitter" button

These 2 buttons are for use only by the fitter.

Boiler ignition may be provoked by :

• A request for heat from the room thermostat, if being used.
• A request for heat by the boiler thermostat (Setting button I).
• Drawing off dometic hot water or a request for heat by the tank*.
• Temperature maintenance in the primary storage tank (City 2.24/II).

* only for boilers with tank and City 2.24/II.

N Temperature display

O 6-position switch

T Domestic hot water temperature maintenance override button (1.24, 3.24) or Maintenance override button for the primary storage tank (2.24)

P Safety shutdown light

Q Unlock button

R Sweeping mode / Previous parameter / Decrementation of the parameter (The previous parameter function is invalidated when an adjustable parameter is concerned)

S Sweeping mode / Parameter incrementation

U "Heating" on light

V Heating temperature setting

W Flame presence light

X Setting the domestic water temperature

Y "Domestic hot water" on light

Z Pressure indicator

N : Temperature display

The display shows the temperature of the water in the domestic hot water heating outlet when there is a request for domestic hot water.

O : 6-position switch

• Stop/Anti-freeze/Bleed
• Domestic hot water (Summer)
• Heating and domestic hot water (Winter)

T : Domestic hot water temperature maintenance override button (City Condens 1.24, 3.24) or Maintenance override button for the primary storage tank (City Condens 2.24)

For City Condens with Easymatic or Easyradio remote control

Pressing for 1 second in summer or summer/winter mode overrides loading of the domestic hot water tank or of the primary storage tank outside the time slot programmed on the control unit up to midnight (indicator light T2 flash)

i Light T1 lit : The burner is ignited to reheat the domestic hot water tank (or primary storage tank)

Light T2 off : No override or programme running Light T2 lit : Comfort programme activated

For City Condens without remote control

Light T1 lit : The burner is ignited to reheat the domestic hot water tank (or primary storage tank)

A power cut does not modify the selected operating mode.

Q : Unlock button

To restart the boiler after safety shutdown.

V : Heating temperature setting

Setting range : 30 °C to 90 °C (Hard spot at 68°C)

X : Setting the domestic water temperature

Setting range : 40 °C to 60 °C
(Hard spot at 55°C): 1.24, 3.24
Setting range : 40 °C to 58 °C
(Hard spot at 53°C): 2.24

Z : Pressure indicator

Displays the pressure in the heating circuit from 0.5 to 2.5 bar. If the red warming light (0.5 bar) is lit, top up with water using the filling system (disconnector, consult your fitter (See next page).

If you can smell gas :

• Close the gas valve
• Open the windows
• Do not operate switches
• Extinguish all flames
• Consult your fitter or the maintenance company
• Inform the gas supplier.

1 Opening the gas valve on the boiler (Example with City 2.24/II)

1 Under the boiler, push the yellow lever upwards
2 Under the boiler, turn the lever a quarter turn

2 Checking the water pressure in the boiler (Example with City 2.24/II)

The water pressure in the boiler must be between 1 and 2 bar.

A

B

Technical line drawing of a mechanical assembly with multiple ports and tubing (no text or symbols)

A Under the boiler, open (+) the 2 valves until you reach a pressure of between 1 and 2 bar

B Close the 2 valves (-)

4 Troubleshooting

Checks to make before calling your fitter

The burner is not working

Example with City 2.24/II

- Check the boiler thermostat settings.

- If using a room temperature thermostat or a remote control (Easymatic or Easyradio), check that it is set according to the instructions.

Line drawing of a person inside a living room with TV, sofa, and door (no text or symbols)

It is cold. There is no domestic hot water (Example with City 2.24/II)

• Note the code displayed AL + ____.
• Press button ↗ until the red light goes out.
• Release the button. The heater restarts.
• If there is a problem, contact your fitter, specifying the alarm code.

The burner is operating but the radiators are cold

▶ Air and water noise in the radiators

• Bleed the radiators.
• Top up the heating circuit with water.
• If it is often necessary to top up the installation with water, contact your fitter.
• If the problem persists, consult your fitter.
  ▶The burner is operating but the radiators are cold
• Check that the boiler heating pump is operating correctly.
• If the problem persists, consult your fitter.

The domestic hot water does not appear hot enough

▶Flow of water from the tap too high. The higher the flow, the lower the temperature.
- Reduce the flow from the hot water tap.
- If several draw-off points are open at the same time, close one or other of the points.

Hot water takes a very long time to reach certain draw-off points and not others

This is due to the length of the hot water pipes between the draw-off points and the boiler. The greater the length, the longer the time necessary for the hot water to replace the colder water in the pipes.

When you inform your fitter of an error, tell him :

▶ Boiler type,
▶ Serial number. This information can be found on the rating plate stuck to the inside of the control panel flap,
▶Year of manufacture. This information can be found on the rating plate stuck to the inside of the control panel flap,
▶Type of gas used.

Warranty

You have just purchased a DE DIETRICH appliance and we thank you for the trust you have placed in our products.

Please note that your appliance will provide good service for a longer period of time if it is regularly checked and maintained.

Your fitter and the DE DIETRICH customer support network are at your disposal at all times.

Warranty terms

Starting from the purchase date shown on the original fitter's invoice, your appliance has a contractual guarantee against any manufacturing defect.

The length of the guarantee is mentioned in the price catalogue.

The manufacturer is not liable for any improper use of the appliance or failure to maintain or install the unit correctly (the user shall take care to ensure that the system is installed by a qualified fitter).

In particular, the manufacturer shall not be held responsible for any damage, loss or injury caused by installations which do not comply with the following:

• applicable local laws and regulations
• specific requirements relating to the installation, such as national and/or local regulations
• the manufacturer's instructions, in particular those relating to the regular maintenance of the unit
• the rules of the profession

The warranty is limited to the exchange or repair of such parts as have been recognised to be faulty by our technical department and does not cover labour, travel and carriage costs.

The warranty shall not apply to the replacement or repair of parts damaged by normal wear and tear, negligence, repairs by unqualified parties, faulty or insufficient monitoring and maintenance, faulty power supply or the use of unsuitable fuel.

Sub-assemblies such as motors, pumps, electric valves etc. are guaranteed only if they have never been dismantled.

France

The preceding dispositions are not exclusive of benefits for the purchaser of the legal guarantee as stated in Civil Code articles 1641 to 1648.

Belgium

The preceding dispositions about the contractual guarantee are not exclusive of profit if the need arises for the purchaser in Belgium of the applicable legal dispositions on hidden defects.

Other countries

The above provisions do not restrict the benefit of the legal laws regarding hidden defects applicable in the buyer's country.

DE DIETRICH THERMIQUE S.A.S.

www.dedietrich.com

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www.dedietrich.com

Rheiner Strasse 151

D-48282 EMSDETTEN

02572/23-5

0 25 72 / 23-102

[e-mail]

VAN MARCKE

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www.vanmarcke.be

Weggevoedenlaan 5

B- 8500 KORTRIJK

056/23 75 11

VESCAL S.A.

www.chauffer.ch / www.heizen.ch

Z.I de la Veyre, St-Légier

1800 VEVEY 1

021 943 02 22

021 943 02 33

NEUBERG S.A.

www.dedietrich.com

39 rue Jacques Stas

L-2010 LUXEMBOURG

02 401 401