The manual stresses that the El600 must be mounted vertically. The hydraulic separator relies on gravity and thermal convection to work correctly. If mounted horizontally, the internal vortex baffles will fail, mixing the hot return water with the hot supply water, effectively destroying the "low-loss" function.
The Bosch EL600 is a compact but capable electric cooktop control panel (or, for some markets, a model code linked to in-built kitchen appliances). Whether you’ve just unpacked a used unit, inherited one, or need to troubleshoot, the EL600 manual is the key to getting safe, reliable performance. This article highlights what the manual typically covers, how to extract the most useful information quickly, and practical tips that save time and avoid common mistakes. Bosch El600 Manual
Bosch includes a pre-commissioning checklist in the manual to ensure the system operates silently. A common failure mode is "hydraulic noise" (gurgling or rushing water), which the manual states is usually caused by insufficient water volume in the secondary circuit. The solution (found on page 12 of the official manual) involves adjusting the balancing valves on the return legs while monitoring the El600's integral pressure gauge. The manual stresses that the El600 must be
If you have lost your manual, here are three common fixes based on the original documentation: The Bosch EL600 is a compact but capable
Issue: The boiler fires constantly, but radiators are cold. Solution (per manual): Check the differential pressure across the El600. The manual states delta P should be < 0.2 bar. If it is higher, the primary pump speed is too high. Reduce pump speed to setting 2.
Issue: Gurgling noise from the header. Solution (per manual): The header is air-locked. Using a flathead screwdriver, open the automatic air vent at the top of the El600 2 full turns. Wait 10 minutes. If noise persists, the diaphragm expansion tank is likely undersized.
Issue: The display reads "Sensor Error." Solution (per manual): Measure resistance across the sensor wires. At 20°C (68°F), a PT1000 sensor should read 1000 Ohms ± 5%. If resistance is infinite, replace the sensor (Part No. 8-735-500-101-0).