Instruction manual
WWH Heater
Pag. 10
5. Maintenance and operation
Causion:
Make sure that you have turned off the power group
that you are working on. The heater must be
earthed.
5.1 Maintenance
Especially in dusty spaces, it’s important to clean the heater regularly. If the heat exchanger is
heavily covered by dust-traps it will not displace the heat sufficiently. Use a vacuum cleaner or
compressed air. Avoid damage to the fins. Clean also the fan and the fan grill.
5.2 Safe operation
The heater is controlled by the room thermostat and/or the 5-stage switch if there is one
connected to it. There are no controls on the heater itself. Depending on the installation, the user
can make following settings:
- Control main or isolation switch
- Turn up and down room thermostat
- Turn up and down contact thermostat
- Change fan speed with 5-stage switch
Adjusting direction of the air outlet is normally no user’s action, this is done by the installer.
5.3 Frost damage
ATTENTION:
frost damage!
Do not set the room thermostat lower than 5°C. Freezing of the exchanger or the tubes, will cause
irrevocable damage to the installation. A constant supply of hot water from the boiler must be
ensured. Frost damage will exclude warranty claims!
