Fig. 4. CARE Icon
Table 23. Boiler Inputs
Inputs |
Description |
Connection Signal Name |
SupplyTemp |
boiler supply temperature |
|
RetTemp |
return temperature |
|
RetTempSp |
return temperature setpoint |
|
ManSwCond |
manual switch condition |
|
PumpStatus |
boiler pump status(universal input) 1 = pump on |
|
ValveEndSwitch |
boiler valve end switch; (universal input) 1 = valve open |
|
BurnerAlarm |
burner alarm input; 1 = alarm |
|
AlarmIn |
common alarm input; 1 = alarm |
|
PumpAlarm |
pump alarm from a pump macro; 1 = alarm |
|
Reset |
alarm reset input |
XXX |
Table 24. Boiler Outputs
Outputs |
Description |
Connection Signal Name |
Stage1Cmd |
boiler stage 1 |
|
Stage2Cmd |
boiler stage 2 |
|
ValveControl |
3-way valve |
|
ButFlyVlv |
butterfly valve |
|
PumpCmd |
connect to a pump macro |
|
VESAlarm |
valve end switch failure |
|
DispBlrPower |
display active boiler capacity |
|
DispPosNumber |
display position number |
|
OperationMode |
contains diagnostic information |
|
StageReqMode |
displays the requested stages |
Table 25. Operation Mode
DISP-03 OperationMode |
Function |
Comments |
1 |
normal operation |
The boiler operates in normal mode and has no alarms or manual overrides. |
2 |
continuous flow |
Leading boilers which have no alarms can be in continuous flow mode. They receive the continuous flow signal from the strategy. If the leading boiler is in alarm, continuous flow will be performed by the next boiler of the sequence. |
3 |
manual operation |
The input “ManSwCond” <> 4 (automatic operation). |
4 |
burner stage 2 “Stage2Cmd” switched off |
maximum supply temperature stage 2 exceeded the value of BST-02 |
5 |
burner stage 1 “Stage1Cmd” switched off |
- maximum return temperature “RetTemp” exceeded - maximum supply temperature stage 1”SupplyTemp” |
6 |
valve end switch failure |
The valve end switch alarm occurs if an end switch is connected and does not give a feedback after 600 seconds after the valve was opened for 100%. |
7 |
pump off alarm |
Stop the boiler due to pump alarm at the input ”PumpAlarm” |
8 |
boiler common failure |
Alarm at one of the inputs “BurnerAlarm” or “AlarmIn” |