6.15 Supplementary source (only RVS41...)
A supplementary source can be operated either independently (e.g. in a zone), or in
addition to the main source (e.g. heat pump).
Control of the supplementary source is based on the "collected" common flow
temperature setpoints, also considering the state of the internal main source or
cascade.
Operating mode
Line no.
Operating line
3700
Release below outside temp
3701
Release above outside temp
Only RVS41..
Operation of the supplementary source is released only when the composite outside
temperature lies above or below the set temperature limit.
Release below / above the
outside temperature
This enables the supplementary source to lock in a selected outside temperature range
in order to attain bivalent operation of supplementary source and heat pump. Also refer
to operating line 2910.
TA gem
B Z3701
B Z3700
1
0
ZE
0.5°C
0.5°C
TAgem Composite outside temperature
ZE
Supplementary source
To ensure continuous release of the supplementary source, setting "---" must be
selected on the respective operating lines.
Overtemperature protection
Line no.
Operating line
3705
Overrun time
Only RVS41..
Overrun time of the release for the external source:
If the integral indicates another heat deficit before the overrun time has elapsed, the
release remains activated.
If the set overrun time elapses before the common flow temperature drops below the
common flow temperature setpoint, the release is also deactivated.
Control
Line no.
Operating line
3720
Switching integral
3722
Switching differential Off
3723
Lock time
Only RVS41..
The temperature-time integral is a continuous summation of the temperature differential
Switching integral
over time. In this case, the decisive criterion is the difference by which the temperature
lies above or below the common flow temperature setpoint.
150/258
Siemens Switzerland Ltd
User manual RVS61.843, RVS41.813
CE1U2355en_02
HVAC Products
6 The settings in detail
28. September 2009