Cleaning The Heater Coil; Filling The System - Baxi Luna Duo-tec Series Supplementary Manual For The Installer

DOMESTIC HOT WATER
EXPANSION TANK
Figure 4: domestic hot water expansion tank

10. CLEANING THE HEATER COIL

To carry out this operation, proceed as described here:
Removing the heater
In addition, if necessary, it is possible to remove the entire heater.
To carry out this operation, proceed as described here:

11. FILLING THE SYSTEM

Important: Regularly check that the pressure gauge (19) reads a pressure of 1 - 1.5 bar when the system is cold. Open the
boiler drain cock to reduce pressure if it is too high. Open the boiler filling cock to increase pressure if it too low (read the
instruction described in the boiler manual).
The cocks can be reached by removing the lower front panel (retained by magnets).
Always open the cock very slowly to allow any air to bleed off.
If the pressure in the system drops frequently, contact an authorised service centre to have the system checked.
7113543.01 - en
SUPPLEMENTARY INSTRUCTIONS
23
FOR THE INSTALLER