2 | © Danfoss | 2023.04
LGB53541
Termix VMTD-IV MIX - 5 Series DS Fully insulated
Table of contents
Introduction..................................................................... 3
Warranty and product liability ...................................... 3
Glossary of technical terms ............................................ 4
Key to symbols ................................................................. 4
Materials .......................................................................... 4
Unit label .......................................................................... 5
Functional specification ................................................. 6
Safety notes ..................................................................... 7
Handling, transport and storage ................................... 8
Assembly, installation and commissioning .................. 8
Unpacking and preparation ..................................................................8
Lifting instructions ...................................................................................9
Mounting and installation ...................................................................11
Dismantling the insulation .................................................................11
Design .........................................................................................................12
Schematic description - Termix VMTD-IV MIX UFH ....................13
Electrical connections and wiring ....................................................14
Wiring diagram - radiator heating ....................................................15
Wiring diagram - underfloor heating ..............................................15
Fitting of energy meter .........................................................................16
Commissioning ........................................................................................16
Filling of the heating system ..............................................................16
Start-up .......................................................................................................17
Underfloor heating ................................................................................17
Operating Guide - Components ................................... 18
Heating controls ............................................................ 18
RAVK controller (35-75 °C) ....................................................................18
Thermoactuators ....................................................................................19
Differential pressure controller ..........................................................19
Circulator pump UPM3..........................................................................19
Grundfos UPM3 AUTO instructions ................................................. 20
IMIT Thermostat ......................................................................................21
Domestic Hot Water Temperature control .................. 21
Tamperproofing the IHPT valve ........................................................21
Pressure absorber .................................................................................. 22
Domestic Hot Water Re-circulation................................................. 22
Maintenance .................................................................. 23
Troubleshooting ............................................................ 24
Deactivation and dismantling ..................................... 26
Disposal .......................................................................... 26
Declaration of conformity ............................................ 27
Pre hand over check list ................................................ 28
