As a consequence, the compressor (K1/K2), source pump (Q8) and emergency heating
elements (K25/K26) must be connected via external relays to the electricity meter.
As an alternative for source pumps, you can use the internal energy calculation for
source operation.
NC contact
The contact is normally closed and must be opened to activate the selected Hx
function.
Type of contact Hx
NO contact
The contact is normally open and must be closed to activate the selected function Hx.
The descriptions given on the functions of contact Hx refer to the setting as NO contact.
If input H1, H2
, H3 (5950, 6046, 5960) is used as a contact input ("Min flow temp setp"
or "Refrigeration request"), the controller uses the value set here as the setpoint.
Function valu
e contact Hx
The heat pump is controlled
constantly at the temperature level set here, either until
contact Hx opens again or until a higher heating / cooling request is delivered.
If several requests for heating or cooling are received at the same time (contact Hx
,
DHW or from the controller itself), the highest or lowest of them is automatically
selected.
Example of minimum flow temperature setpoint:
30 20 10 0-10
40
30
60
50
80
70
TVw
TVw
2355Z20
TA
°C
°C
gem
0
TVHw
TVHw Minimum flow temperature setpoint
TVw Flow temperature setpoint
These settings are available for each input Hx.
Voltage value
1
Function value 1
Voltage value 2
Function value 2
The linear characteristic is d
efined via 2 fixed points. The setting is made with 2
parameter pairs for
Function value and Voltage value (F1/U1 and F2/U2).
• Example of heat or refrigeration request 10 V
TVLw
[°C]
Hx [V]
U
2
=10VU
1
=0V
F
1
=0
0.15 V
F
2
=130
TVLw Flow temperature setpoint
Hx Voltage value at Hx
U1 Voltage value 1
F1 Function value 1
184/258
Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products 6 The settings in detail 28. September 2009
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