Danfoss Akva Lux II TDP-F Instructions For Installation And Use Manual page 13

Instructions for installation and use
Zone valve / thermal actuator TWA-A
The Akva Lux II TDP-F can be supplied with zone valve/thermal ac-
tuator TWA-A, which enables connection to an electronic program-
mable room thermostat.
The thermal actuator of the zone valve is switched on by an exter-
nal contact from the room thermostat, and starts to open or close
the valve. The actuating movement is achieved by means of an
electrically heated expansion element. When the heating current is
switched off, the actuator shuts or opens the valve.
The actuator is equipped with a visual position indicator to show
the open or closed position of the valve.
INSTRUCTIONS
TWA NC
TWA-A
For Danfoss RA valves
TWA-V
For Danfoss RAV/VMT valves
TWA-L
For Danfoss RAVL valves
TWA-K
For Heimeier/MNG/Oventrop
valves with M30 × 1.5 connection,
generally as per attached drawing.
Other valves must be verified
individually to ensure correct
valve closing measurement and
valve top geometry.
TWA-D
For Danfoss RTD valves
*) 24 V Class II transformer (SELV)
**) 230 V max. 3 A pre-fuse
VI.SB.H3.02 12-2005
Produced by Danfoss Industri Service 05.09 JJ-Bi.DS
Electronic programmable room thermostat (option)
If the substation is connected to a room thermostat the tempera-
ture is controlled by the room thermostat and radiator thermostats.
Please note that the room thermostat keeps the temperature at a
constant level in the whole apartment according to the set room
parameters.
Consult additional maintenance instructions for room thermostat
for further information. It is recommended to avoid fully opened
thermostats on some radiators and fully shut-off on others. Higher
temperature at the top and lower temperature at the bottom part
of radiators means that the system operation is correct. To keep cor-
rect temperature and friendly microclimate for human beings in the
apartment, it is recommended to ensure regular airing in rooms.
Danfoss District Energy
Akva Lux II TDP-F
VI.HE.A1.02
Thermal actuator TWA-A
13 13
DKDHR