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The function of the thermal process safeguard must be checked once a year by a technician and the
amount of limescale in the thermal safety device must be checked. If there is limescale in the thermal
safety device then it must always be removed.
– Press the red cap against the valve (Fig. 55) > Water must flow out
into the funnel.
– Little outflow at funnel > Limescale in thermal safety device (pump
limescale remove – e.g. formic acid – through the thermal safety
device).
– Thermal process safeguard dripping > Clean the seal on the piston
and valve seat. If the seal is damaged > Renew the piston.
Please note:
There is no need to remove the fitting for this pur-
pose!
Fig. 55
Thermal process safeguard
4.2 Checking and servicing the thermal process safeguard
(Please inform your customer)
For the Service Technician
4.1 Service and repair work
Service and repair may be performed only by appropriately qualified technicians.
Switching off the on/off button on the InfoWIN does not mean the boiler and its accessories are completely
without power! When replacing system components (pumps, mixing valves, etc.) prevent all power input (e.g.
by removing the mains power plug).
Power plug
De-energise the boiler before opening the control panel for service or repair purposes. Unscrew boiler
cover at front – Fig. 53. Unplug power plug – Fig. 54.
Fig. 54
Disconnecting plugs – rear view
Fig. 53
Securing 2 screws at the front
