Siemens RVS41.813 User Manual page 178

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HVAC Products
1st speed
output Q2/Q6/Q20
Off
On
On
Diverting valve cooling Y21
Control of the diverting valve for cooling. This necessitates a 4-pipe system. The
diverting valve for cooling is required in the case of a commonly used heating and
cooling circuit for changeover from heating to cooling when the heat pump is used not
only for heating but also and simultaneously for cooling.
HK/KK
B1
T
Q2
Y1/Y2
Y21
H
H
K
K
Air dehumidifier K29
When room humidity rises, an external air dehumidifier can be switched on. In this
case, a humidity sensor must be connected to input Hx.
The functionality of the air dehumidifier is independent of cooling functionality.
Operation of the dehumidifier is not affected by operating modes, holiday programs,
presence button, etc.
Heat request K27
Indicates to an external heat source when there is a request for heat by closing its
contact.
Refrigeration request K28
As soon as there is refrigeration demand in cooling circuit 1, output K28 is activated.
This can be used to switch on an external refrigeration machine.
In the case of device with address 1, a refrigeration demand from the system also can
activate output K28. For this purpose, operating line 6627 "Refrig demand K28" on
menu "LPB system" must be set to "Centrally".
Alarm output K10
If a fault occurs in the controller or the system, one of the alarm relays delivers a signal.
The relevant contact closes with a delay of 10 minutes.
When the fault is corrected, that is, when the error message is no longer present, the
contact opens with no delay.
Time program 5 K13
The relay switches any connected component at the points in time set in time program
5 (601 – 616).
Heating circuit pump HC1 Q2
The relay is used for the control of heating circuit pump Q2.
User manual RVS61.843, RVS41.813
6 The settings in detail
2nd speed
Output Q21/Q22/Q23
Off
Off
On
Example:
4-pipe system
Pump state
Off
Part load
Full load
CE1U2355en_02
28. September 2009