Zehnder Rittling ComfoAir Q, Installer Manual

Page: 4 / 52

4 - EN
8 Maintenance procedures ............................................................................................................................................. 24
8.1 Procedure for opening the unit ............................................................................................................................. 24
8.2 Maintenance of the casing ................................................................................................................................... 25
8.3 Maintenance of the heat exchanger ..................................................................................................................... 25
8.4 Maintenance of the fans ....................................................................................................................................... 26
8.5 Maintenance of the modulating by-pass valves ...................................................................................................... 27
8.6 Maintenance of the pre-heater .............................................................................................................................. 27
8.7 Maintenance of the condensation drain ................................................................................................................. 28
8.8 Maintenance of the air ducts ................................................................................................................................ 28
8.9 Procedure for ending the maintenance .................................................................................................................. 29
9. Malfunction procedures .............................................................................................................................................. 30
9.1 How to gain access to the ComfoNet connectors on the unit .................................................................................. 30
9.2 How to gain access to the control PCB ................................................................................................................. 30
9.3 How to gain access to the main power fuse of the unit .......................................................................................... 31
9.4 How to change the location of the pre-heater ........................................................................................................ 31
9.5 How to gain access to the top-section sensor ....................................................................................................... 32
9.6 How to remove the modulating by-pass valve ........................................................................................................ 32
9.7 How to gain access to the mid-section sensor....................................................................................................... 33
9.8 Malfunction alerts on the display of the unit ........................................................................................................... 34
9.9 Malfunction alerts on the ComfoSense C .............................................................................................................. 35
9.10 Malfunction alerts on the ComfoSwitch C .............................................................................................................. 35
9.12 Malfunction alerts on the Control App ................................................................................................................... 35
9.12 Malfunction alerts on the Timer RF ........................................................................................................................ 35
9.14 What to do in the event of a malfunction alert (troubleshooting) ............................................................................... 36
9.15 What to do in the event of a malfunction (or problem) without a malfunction alert (troubleshooting) ............................ 45
10 Available operating devices ......................................................................................................................................... 47
11 Optional ancillaries ...................................................................................................................................................... 48
Quick Installation Guide ............................................................................................................................................... 52