AD 4538 - Instant water heater and boiler ADLER - Free user manual and instructions
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| Product type | Instantaneous water heater and gas wall-mounted boiler |
| Brand | ADLER |
| Model | AD 4538 |
| Power supply | Natural gas (G20) |
| Thermal power | 24 kW |
| Domestic hot water flow rate | 13.7 L/min for a 25 °C temperature rise |
| Dimensions (H x W x D) | 700 x 400 x 300 mm |
| Weight | 28 kg |
| Main functions | Instantaneous domestic hot water production and central heating |
| Temperature setting | Hot water: 35 °C – 60 °C; Heating: 40 °C – 80 °C |
| Flue gas evacuation | Horizontal or vertical concentric duct |
| Safety | Flame detection, overheat protection, safety valve, temperature limiter |
| Maintenance and cleaning | Annual descaling of the heat exchanger, bleeding of the heating circuit, inspection of the duct by a professional |
| Spare parts and repairability | Heat exchanger, heating body, gas solenoid valve available from ADLER after-sales service |
| Warranty | 2 years |
| Approval | CE |
Frequently Asked Questions - AD 4538 ADLER
How to adjust the hot water temperature on the ADLER AD 4538?
Use the dedicated domestic hot water button on the control panel. The temperature can be adjusted between 35 °C and 60 °C according to your needs.
What to do if the appliance does not start?
First check the gas supply, electrical power and the water circuit pressure. If the problem persists, refer to the troubleshooting section of the manual or contact a professional installer.
How to maintain the AD 4538 water heater?
It is recommended to have the heat exchanger descaled each year and to have the burner and flue duct checked by a qualified professional.
What water pressure is required for operation?
The appliance operates with a water pressure between 1 and 6 bars. Check that the pressure of your installation is within this range.
Can I install the appliance myself?
No, the installation of this type of appliance must be carried out by a certified professional in accordance with current standards, in particular for the gas connection and flue gas evacuation.
How to bleed the heating circuit?
Use the bleed screw located on the radiators. Start with the radiator farthest from the boiler and open the screw until air escapes and water flows steadily.
What does the alarm indicator on the screen mean?
An alarm light can indicate a flame fault, overheating or insufficient pressure. Refer to the error code table in the manual to identify the exact problem.
Where can I find spare parts for the AD 4538?
Spare parts such as the heat exchanger, the heating body or the gas solenoid valve are available from the ADLER after-sales service or authorized dealers.
What is the warranty of the appliance?
The AD 4538 is guaranteed 2 years against any manufacturing defect. The warranty does not cover wear parts or damage due to incorrect installation.
Is reading the 178-page manual really necessary?
Yes, the manual contains essential information on safety, installation, use and maintenance. Read the safety instructions chapter carefully before any operation.
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USER MANUAL AD 4538 ADLER
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Product information
Brand : ADLER
Model : AD 4538
Category : Instant water heater and boiler