50 Instruction manual TWI 35-130 G/TWI 45-190 G
10.3.1 Descale
Scaling depends on the water condition and the water demand. Besides, more
scale deposit will be formed in the device at high temperatures. A temperature
setting of 60 ºC is recommended to ensure low scale deposit. Descale using the
appropriate agents. A descaling instruction is available for detailed information.
10.3.2 Clean the condensation drainage
Regularly clean the condensation drainage and the siphon to avoid stoppage.
10.4.1 Introduction
Proceed as follows for gas-side maintenance:
1. Clean the burner.
2. Clean the heat exchanger.
10.4.2 Clean the burner
1. Dismount the burner.
2. Remove the contamination present on the burner.
3. Remount the burner.
10.4.3 Clean the heat exchanger
1. Dismount the burner.
2. Clean the combustion chamber of the heat exchanger using a vacuum
cleaner and a soft brush.
3. Dismount the fl ue gas discharge.
4. Clean the end of the heat exchanger using tap water.
5. Remount the burner.
6. Remount the fl ue gas discharge.
Remark
Check the pressure difference again after cleaning. Contact the supplier
of the device if the pressure difference remains too low.
Proceed as follows for completing the maintenance:
1. Fill the device (5 “Fill”).
2. Start up the device
(7 “Start up”).
Maintenance
10
10.3 Water-side
maintenance
10.4 Gas-side
maintenance
10.5 Complete
maintenance
