12 | Regulations
The anti-freeze device protects the appliance
against possible risks of freezing.
Codes of errors in the display
See tab. 11 on page 21.
Resetting the appliance
Some of the possible faults may be solved by resetting the
▶ Press the button
Cleaning the front of the appliance
▶ Only clean the front of the appliance with a cloth and some
Do not use corrosive and/or abrasive
Any local by-laws and regulations pertaining to installation and
use of gas-heated appliances must be observed. Please refer to
the laws that should be attended in your country.
Installation (only by qualified
▶ Always shut off the gas tap before any
work on the gas pipe parts.
6 720 819 528 (2016/02)
for 3 seconds.
The installation, electrical connection, the
installation of the gas, the connection of the
flue/air intake pipes and the initial start-up
are operations to be carried out by
The appliance may only be used in the
countries indicated on the rating plate.
▶ The temperature of the incoming water
of the appliance must not exceed 60 °C.
▶ Fit a 3-way or thermostatic valve
(adjusted for values less than 60 °C), if
the incoming water temperature
exceeds these values.
▶ In the case of a thermal solar system,
ensure that the installation has an
Thermal solar system (thermosiphon)
Thermal solar system
 Cold water from the mains
 Incoming water
 Thermostatic valve
 Expansion tank
 Safety unit
For outgoing temperatures above 45 °C, we
recommend the use of a de-scaling system.
Therm 4000 S