Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Configuration 23. August 2007
Separate DHW circuit
Line no. Operating line
5736 Separate DHW circuit
The separate circuit can only be employed if a boiler cascade is used.
OFF:
The separate circuit is switched off. Every boiler in use can charge the DHW storage
tank
ON:
The separate circuit is switched on. DHW charging takes place exclusively via the
boiler defined for that purpose.
For the separate circuit, DHW controlling element Q3 must be set to “Diverting valve”!
Boiler
Line no. Operating line
5770 Type of heat source
1-stage
2-stage
Modulating 3-position
Modulating UX
Without boiler sensor
2 x 1 cascade
In the case of a 1-boiler plant, the burner stage of the single stage boiler is released as
soon as a valid boiler temperature setpoint becomes active.
TKw+SDK½
0
1
BR
2371D01
°C
TKw
TKw-SDK
½
TKx
t
40°C
Connections:
Use Space Connector type
L1 Phase burner P AGP8S.07A/109
Protective earth
N Neutral conductor
T1 Phase 1st burner stage
T2 1st burner stage on
S3 Input burner fault
4 Input 1st burner stage operating hours
If the required boiler temperature setpoint cannot be reached with the first burner stage,
the second burner stage will be released (release integral satisfied). When the second
burner stage is released, the first burner stage stays active, but setpoint control will be
ensured by the second stage. The first stage can be switched off again only when the
second stage is locked (reset integral satisfied).
1-stage
2-stage