33
Installation instructions geoTHERM VWS/VWW 0020051574_01
6.6.3 Mixer circuit with buffer cylinder (Hydraulic
plan 2)
The regulated underfloor heating circuits are operated
by the external heating circuit pump from the buffer
cylinder via a mixer. The flow temperature sensor sits
behind the external pump.
The heat pump responds to a demand for heat from the
buffer cylinder.
Fig. 6.9 Hydraulic plan 2
Key to Fig. 6.9
3
geoTHERM heat pump, VWS/VWW
4
Buffer cylinder, VPS
13
Weather-controlled energy balance controller
13a
VR 90 remote control unit
13b
Mixer module VR 60
16
External sensor/DCF receiver
19 Maximum thermostat
30
Non-return valve
31
Control valve with position indication
32
Cap valve
33
Dirt trap
42a Expansion
relief
valve
42b Diaphragm
expansion
tank
52
Valve, individual room control
58
Fill and drain valve
KP
Circulation pump, heat pump circuit
HKa-P CH pump
HKb-P CH pump
HK2-P CH pump
HKa
Mixer module for heating circuit
HKb
Mixer module for heating circuit
HK2
Mixer module for heating circuit
RF1
Return temperature sensor
VFa
Supply temperature sensor
VFb Supply
temperature
sensor
VF1 Supply
temperature
sensor
VF2
Supply temperature sensor
WQ
Heat source circuit
The brine pump is only included with VWS.
Electrical installation 6
