Operation Manual

131/180
Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Configuration 23. August 2007
The voltage signal present at input H… is converted into a linearized pressure value.
The pressure value at 3.5 V can be adjusted with parameter Pressure value 3.5V H..”.
Example:
p
H1
3.5 V
4
0
D
35
= 4bar
2
1
0.5 V
D
35
= 2bar
D
35
= 1bar
2359Z136
p Pressure value (bar)
H1 Voltage at H..
Input EX2
Line no. Operating line
5982 Function input EX2
Counter for second burner
stage
Heat generation lock
Error / alarm message
SLT error message
Excess heat discharge
5983 Cont type input EX2
NC
N/O
Counter for second burner stage
The counting values (hours run and number of starts) for the second burner stage are
recorded based on the signal received at input EX2. If the function is not activated, the
counting values are counted based on the state of relay K5 .
Heat generation lock
The heat source will be locked via terminals EX2.
All temperature requests made by the heating circuits and by DHW will be ignored.
Frost protection for the boiler will be maintained.
The chimney sweep function can be activated although the heat generation lock is
switched on.
Error / alarm message
Input EX2 generates a controller-internal error message.
If the “Alarm output” (relay outputs QX2-4, operating lines 5891 – 5894) is appropriately
configured, the error message will be forwarded or displayed by an additional contact
(e.g. an external lamp or horn).
SLT error message
The input generates error message 110.
Pressure value 3.5V H…
Function input EX2