Operation Mode

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”