Inputs and Outputs


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
 the value of “RetTempSP” or

- maximum supply temperature stage 1”SupplyTemp”
 exceeded the value of BST-01

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”