DeDietrich VIVADENS MCR Manual

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Technical information
Heading No 5
Wall-hung gas condensing boilers
VIVADENS MCR, MCR-P, MCR BIC
MCX
Product evolution
P5253 JS F 67580 Mertzwiller N° IT2621 26/11/2014
Technical Sales Documentation
Department
EN
1. Description of the modifications
A thermal fuse has been added in the upper part of the heat exchanger front plate. The thermal fuse is connected in
series with the overheating safety thermostat of the heat exchanger.
The thermal fuse shuts down the boiler if the temperature reaches 128 °C and the error E13 appears.
Application date in series: 22 september 2014.
As of serial number 1426209919550.
During the annual maintenance, check the burner plate insulation and imperatively replace the gaskets. In spare parts,
the burner plate insulation is systematically delivered with a thermal fuse, which is to be mounted on the heat exchanger
front plate.
The thermal fuse is also delivered with the maintenance kit available from the Spare Part Centre (see kits hereafter).
Zsee the leaflet delivered with the kit : Reference 7619580 (Click on the reference to open the link).
G000790
New version Previous version
Thermal fuse
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2. Spare parts
Kits available in the Spare part Centre:
ZFor more detailed information, see the leaflet delivered with the kit : Reference 7619580 (Click on the reference to
open the link).
Maintenance kit :
3. Error code E13 (Overheating at the heat exchanger)
If error E13 appears, carry out the following operations and controls:
`Check the wiring and the connections,
`Check the water pressure in the installation. Check that the boiler circulating pump is working.
`Check the overheating safety thermostat at the heat exchanger : if triggered, replace the heat exchanger
`Check thermal fuse (dry contact) : if triggered, replace it, and adress the cause of the overheating.
Check the tightening of the heat exchanger front plate.
In case of bad tightness, replace defective parts, the front plate insulation disk and the front plate gasket.
Reference Description
7619579 Heat exchanger front plate insulation disk
(Insulation + Thermal fuse)
7619082 Maintenance kit (see picture below)

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4. Service operations
The front plate insulation disk is an important part to ensure safe operation of the boiler and must therefore be in good
condition. A damaged front plate insulation disk can lead to leakage on the flue gas side.
Check the front plate insulation disk for cracks, damage, moisture, ageing or distortion. In case of doubt or anomaly,
replace the front plate insulation disk and put in place the thermal fuse if not yet installed.
For optimum safety, we advise replacing the front plate insulation disk every 2 year(s).
- Check systematically the heat exchanger front plate insulation
disk when the front panel is removed. Replace the front plate
insulation disk if in doubt or if there are abnormalities.
- At each opening, imperatively replace the gasktet.
Ensure proper positioning of the gasket !
- Fit the burner with caution.
- Put in place the ignition electrode with caution.