Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 49

System example 2, ID: 4605308_1006_01
Pos. Designation
Natural cooling function (NC)
Note
All required components (with a suitably designed plate heat exchanger)
for the cooling circuit must be provided on site.
iQ 3-way diverter valve
Note
When using a 3-way diverter valve without spring-loaded return, at contact
gS2 (from pos iU) "L1" must be connected (see for example terminal strip
X3).
iW Secondary cooling circuit pump
iE Contact humidistat
iR
Primary cooling circuit pump
iT Mixer motor in 3-way mixer
iZ Frost stat
iU
Extension kit for NC
iI Extension kit for heating circuit (cooling circuit) with mixer
iO Motorised two-way valve, normally closed
Note
When using a 2-way diverter valve without spring-loaded return, at contact
gS1 (from pos iU) "L1" must be connected (see for example terminal strip
X3).
Heating circuit without mixer (A1)
oP Radiator heating circuit
oQ Vitotrol 200 remote control
oZ Heating circuit pump
Heating circuit with mixer (M2)
uP
Underfloor heating circuit with directly controlled mixer motor
uQ Vitotrol 200 remote control (accessory)
uE Flow temperature sensor
uR
Temperature limiter as maximum limiter for underfloor heating systems
uZ Heating circuit pump
uU Mixer motor in 3-way mixer
Preparing for installation
(cont.)
49