Designating Heating Circuits; Setting High Altitude - Viessmann Vitocrossal 300 Series Service Instructions Manual

Start-up

Designating Heating Circuits

Setting High Altitude

16
Vitocrossal 300 CU3A 26 to 199 Service
In the delivered condition, the heating circuits are
designated "Heating circuit 1", "Heating circuit 2" and
"Heating circuit 3" (if installed).
If the system user prefers, the heating circuits can be
designated differently to suit the specific system.
To enter names for heating circuits:
Refer to the Operating Instructions
In the factory default setting, the boiler is equipped to
operate in altitudes of up to 5,000 ft. (1,500 m).
Altitude can be set using coding address 93:
(in coding level 2 General).
- Coding 11:9 must be set in order to unlock coding 93:.
- 93:0 is reserved for altitudes up to 5000 ft. (1500 m).
- 93:6 must be set for altitudes from 5000 ft. (1500 m).
to 10000 ft. (3000 m)
- Setting back to 93:0 turns off the high altitude
function.
IMPORTANT
Do not set or use coding addresses 93:1 to 93:5.
- After setting coding address 93:, set coding address 11:0
- The program is automatically disabled after 20 minutes.