What does the shop sell?

Spare parts for gas and oil burners and boilers: gas valves, nozzles, ignition electrodes and transformers, pressure switches, flame detectors, fuel pumps, servomotors and burner control boxes.

How large is the catalogue?

Over 100,000 part numbers from every major manufacturer, brought into one structure so that parts from different brands can be compared and replaced.

Can I find a part by its number?

Yes. The order number, the manufacturer model and any supplier code all lead to the same part, so a number from an old invoice or a nameplate is enough.

What if the part is discontinued?

The catalogue records what the manufacturer replaced it with, and which parts from other brands do the same job — together with the conditions that apply.

The company is based in London and ships across the United Kingdom, Europe and the rest of the world.

Is the shop open yet?

The catalogue is being assembled now. The shop opens as soon as it is ready.

Siemens Control box LDU11.323A27

Key specifications

Supply voltage	220–240 V
Safety time	27 s
Protection class (IP)	IP40
Frequency range	50–60 Hz
External fuse	10 A
Power consumption	2.5 W
Pre-purge time	22.1 s
Pre-ignition time	2.5 s

Supply voltage

220–240 V

Safety time

27 s

Protection class (IP)

IP40

Frequency range

50–60 Hz

External fuse

10 A

Power consumption

2.5 W

Pre-purge time

22.1 s

Pre-ignition time

2.5 s

all specifications (8) ↓

Description

A burner control box that manages the ignition sequence and monitors safety interlocks during operation. It provides a 22.1 s pre-purge, a 2.5 s pre-ignition time, and a 27 s safety time. Supply voltage is 220–240 V AC at 50–60 Hz, with power consumption of 2.5 W and an external fuse rating of 10 A. Protection class is IP40.

Choosing and fitting

When replacing a control box of this type, match the exact series and full type designation, supply voltage, pre-purge time, safety time, and flame detection method. The base or plug pattern must correspond to the existing wiring. Compare the timing sequence against the original unit because even within the same brand different series are not interchangeable. Verify the full type designation on the old control before ordering, as multiple variants exist for different voltage and timing specifications.

All specifications

Supply voltage	220–240 V
Safety time	27 s
Protection class (IP)	IP40
Frequency range	50–60 Hz
External fuse	10 A
Power consumption	2.5 W
Pre-purge time	22.1 s
Pre-ignition time	2.5 s