Service instructions for heating engineers Electric immersion heater EHO part no. 7265 124, part no. 7265 197 and part no.
General Information Safety instructions Please follow these safety instructions closely to prevent accidents and material losses. These safety instructions also apply in conjunction with heat generators. Work on the equipment Installation, initial start−up, maintenance and repairs must only be carried out by a competent person (heating engineer/installation contractor) (EN 50 110, part 1, and VDE 1000, part 10, or local regulations).
Contents Page General Information Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Implementation . . . . . . . . . .
Initial start−up and maintenance Implementation For commissioning the electric immersion heater EHO, see also the operating instructions. ¨ Safety instructions The electric immersion heater EHO may only be taken into use after the DHW cylinder has been properly filled and is under operating pressure. Only open the heating water connections after the DHW cylinder has been de−pressurised. Only drain the DHW cylinder with a vacuum pump when the air vent valve is open. Maintenance 1.
Initial start−up and maintenance Implementation (cont.) Initial start−up Maintenance 4. Changing the thermostat setting "As delivered" condition The thermostat may be set to a value between 30 and 60 ºC. The frost protection temperature is approx. 5 ºC. Adjustment options The upper limit may be changed to 80 ºC. . 1. Pull rotary selector A off the thermostat. 2. Extract spigot B with a pair of pliers from the rotary selector. 3. Push rotary selector A onto the thermostat. 4.
Troubleshooting Resetting the high limit safety cut−out Please note: The high limit safety cut−out must be reset, if +0 K it has been activated (switch−off point: 100 ºC 8 K ). 1. Isolate the electric immersion heater EHO supply cable and safeguard against re−connection. 2. Remove the cap. 5692 415 GB 3. Press reset button A on the thermostat/high limit safety cut−out. The high limit safety cut−out will reset.
Additional information Electrical connection ¨ Safety instructions Observe the relevant DIN standards and VDE regulations (in particular VDE regulation 0100) as well as the technical requirements of local energy suppliers and water authorities, and all other local regulations. Provide a facility in the electric immersion heater power supply cable which can separate all conductors from the mains supply with at least 3 mm contact separation (except the neutral conductor).
Additional information Parts list Electric immersion heater EHO, part no. 7265 124, for Vitocell−V 100, type CVA When ordering spare parts: Quote the part and serial no. of the equipment (see type plate) and the item no. of the required part (as per parts list). Obtain common parts from your local supplier. 001 003 Parts 001 Gasket 003 Flange (incl.
Additional information Parts list (cont.) Electric immersion heater EHO, part no. 7265 198, for Vitocell−B 100, type CVB, and Vitocell 333, type SVK When ordering spare parts: Quote the part and serial no. of the equipment (see type plate) and the item no. of the required part (as per parts list). Obtain common parts from your local supplier.
Additional information Parts list (cont.) Electric immersion heater EHO, part no. 7265 197, for Vitocell−V 300, type EVI When ordering spare parts: Quote the part and serial no. of the equipment (see type plate) and the item no. of the required part (as per parts list). Obtain common parts from your local supplier. Parts 001 Flange (incl.
Additional information Commissioning/service report Initial start−up Maintenance/Service Maintenance/Service Maintenance/Service Maintenance/Service date: by: Maintenance/Service Maintenance/Service Maintenance/Service Maintenance/Service Maintenance/Service date: 5692 415 GB by: 11
Additional information Declaration of Conformity for electric immersion heater EHO We, Viessmann Werke GmbH & Co, D 35107 Allendorf, declare as sole responsible body, that the product with the type code Electric immersion heater EHO for DHW cylinder Vitocell−V 100, type CVA and Vitocell−B 100, type CVB, Vitocell−V 300, type EVI, and Vitocell 333, type SVK corresponds to the following standards: EN 50 081 1 EN 50 082 1 EN 60 555 2 EN 60 555 3 EN 60 555 3/A This product is identified in accordance wit
