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Line
Function
534
Temperature differential ON heat transfer
535
Temperature differential OFF heat transfer
Overtemperature protection d.h.w. storage tank
539
Differential of maximum storage tank temperature
(MSB) and d.h.w. storage tank safety temperature
540
Hysteresis of the d.h.w. cooling function with priority 1
541
Priority of d.h.w. storage tank cooling with transfer
pump
---
Function deactivated
1
Priority 1
2
Priority 2
542
Priority of d.h.w. storage tank cooling with collector
pump
---
Function deactivated
1
Priority 1
2
Priority 2
544
Priority of d.h.w. storage tank cooling with overtem-
perature protection output K11
---
Function deactivated
1
Priority 1
2
Priority 2
Diagnosis
545
Functional test of d.h.w. storage tank
---
No test
0
Everything off
1
Charging pump ON (Q3)
2
In addition, diverting valve ON (Q3 + Y3)
3
Transfer pump ON (Q11)
Combi storage tank
570
B4 delivers temperature for functionality B31
0
No
1
Yes
Bivalent operation
Heat source sequence
620
Lead heat source
1
Oil- / gas-fired boiler
2
Heat pump
3
Wood-fired boiler
621
Switch-on delay lag heat source
622
Release limit for lag heat source
623
Reset limit for lag heat source
Release according to the outside temperature
630
Release of oil- / gas-fired boiler below the outside tem-
perature threshold
---
Boiler always released
631
Release of heat pump above the outside temperature
threshold
---
Heat pump always released
632
Release of wood-fired boiler below the outside tem-
perature threshold
---
Boiler always released
D.h.w. heating
640
Heat source strategy for d.h.w. heating
1
D.h.w. according to the current heat source sequence.
2
D.h.w. with lag heat source, lead heat source maintains the
room temperature setpoint during d.h.w. heating.
3
D.h.w. with lag heat source, lead heat source is shut down
during d.h.w. heating.
4
D.h.w. with lag heat source if released, lead heat source
maintains the room temperature setpoint during d.h.w. heating.
5
D.h.w. with lag heat source if released, lead heat source is shut
down during d.h.w. heating.
Siemens Building Technologies / HVAC Products
Range
Unit
Line 535...40
°C
0...line 534
°C
1...50
K
1...20
°C
--- / 1...2
–
--- / 1...2
–
--- / 1...2
–
--- / 0...3
–
0 / 1
–
1...3
–
1...255
min
0...500
K*min
0...500
K*min
--- / –30...30
°C
--- / –30...30
°C
--- / –30...30
°C
1...5
–
74 319 0312 0 a
Resolution
Factory
setting
...... °C
6
...... °C
4
...... K
5
...... °C
5
......
- - -
......
- - -
......
- - -
......
- - -
......
0
......
–
...... min
10
.....K*min
200
.....K*min
50
...... °C
- - -
...... °C
- - -
...... °C
- - -
......
1
19.08.2002
19/28
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