The operation mode provides useful information for easy testing and debugging of the heating circuit. This information is available as a parameter DISP-05 or the macro output "OperationMode". The output operation mode should be connected to a multi-stage datapoint with the states as shown in the next table. Since BACnet multi-stage points do not support the value "0", the operation mode value range starts from "1".
Table 11. Operation mode
DISP-05 |
Operation Mode |
|
1 |
Unoccupied period |
RoomTempSp < SYS-01 |
2 |
Occupied period |
RoomTempSp >= SYS-01 |
3 |
||
4 |
||
5 |
Minimum MWT protection |
Total cooldown and MixedWaterTemp < MWT-10 – ½ MWT-07 and “FilteredOATemp” < OAT-03 and OperationMode <> 7 |
6 |
Maximum RWT control |
“ReturnWaterTemp” > “CalcRetTmpSp”– ½ RWT-05 |
7 |
OAT limits exceeded |
“FilteredOATemp” > OAT-02 or “LongFiltOATemp” > OAT-01 |
8 (with room sensor) |
Minimum RMT protection |
“RoomTemp” is configured (<>999) and (“RoomTemp” < “RoomTempSp” or “RoomTemp” < RMT-02) and unoccupied period and OperationMode <> 7 |
8 (without room sensor) |
freeze protection with night setback |
“RoomTemp” is not configured (=999) and unoccupied period and “FilteredOATemp" < OAT-03 |
9 |
Condensation protection/ DHWS priority request |
One of the inputs “DHWS_Priority” or “CondensProt” = 1 |
10 |
Heat override function |
Input “OverheatProt” = 1 |
11 |
Maximum temperature limitation by MXT |
Alarm at the input “MaxThermostat” |