Vaillant MultiMatic 700/2 - Solar Circuit (VR 70 = 6, 12); Basic Function; Solar Function

multiMATIC 700/2
Notes
10/2015 75 Training 0020228700_00
4.5.7.12 Solar circuit (VR 70 = 6, 12)
Prompt/setting
Select
Comment
Collector temperature
Display in °C
Solar pump status
On, Off
Solar pump runtime
Value in h
Reset runtime
No, Yes
Resets the solar circuit pump operating hours
Solar yield sensor
Display in °C
Solar flow volume
Auto, 0.1 – 165.0 l/min
The flow rate of the solar fluid is entered in
l/min under "flow volume". This value corre-
sponds to the setting on the flow volume lim-
iter of the solar pump unit. The PWM signal is
used to determine the volume flow for the
new VMS 70 solar pump unit; "Auto" must be
set.
Solar pump boost
On, Off
The solar pump is switched on for 15 sec-
onds once the collector temperature at the
collector temperature sensor has risen by 2 K
due to solar radiation.
Solar circuit prot.
110 – 150 °C
If the temperature at the collector tempera-
ture sensor exceeds the adjustable solar
circuit protection temperature, the collector
pump remains switched off.
Min. collector temp
0 – 99 °C
Purging time
0 – 600 min
Current flow rate
Display in l/min
Basic function
Solar function
The solar function is always active. It is only switched off in the "System off" operating
mode.
The "Collector temperature" and "Cyl. temp.: Bottom" sensors are constantly tested. As
soon as the difference between these two values exceeds the switch-on differential,
the solar pump is switched on. If the difference falls below the switch-off differential,
the solar pump is switched off again.
Solar pump boost: The position of the collector sensor is not ideal for the tube collec-
tor in particular (because it is fitted in the cylinder dry pocket outside the distributor).