Adjustment And Commissioning, Heating Circuit - Danfoss VX Solo II Series Instructions For Installation And Use Manual

Instructions for installation and use

11.0 Adjustment and commissioning, heating circuit

The temperature for the heating circuit can be controlled by a
thermostatic valve T°C 200.
Approximate thermostat scale setting:
Pos. 1 = 20°C
2 = 30°C
3 = 40°C
4 = 50°C
5 = 60°C
6 = 70°C
Please note that the values are intended as a guide and may vary
according to the district heating operating conditions.
Approximate supply temperatures at:
10 °C outdoor temperature approx. 40°C
0 °C outdoor temperature approx. 55°C
-10 °C outdoor temperature approx. 65°C
It is important to keep the supply temperature to the radiators as low
as possible (the temperature is indicated by thermometer mounted
in HE return). The room temperature is controlled by radiator ther-
mostats.
Floor heating (substation with heat exchanger for floor heating).
It is important to keep the supply temperature to the floor heating
system as low as possible, approx. 30-35° (the temperature is indi-
cated by thermometer mounted in HE supply),
The T°C is typically set in pos. 2-2.5 (intended as a guide). The supply
temperature should not exceed 40°C (ALWAYS refer to the instruc-
tions of the floor supplier).
Please note that a label on the TC thermostat will indicate the temperature
range.
Zone valve / thermal actuator TWA-A (option)
The thermostatically controlled VX Solo II can as option be equipped
with zone valve/thermal actuator TWA-V, which enables connection
to an electronic programmable 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.
Heating operation is then activated by the programmable room ther-
mostat in connection with a zone valve /thermal actuator TWA-A.
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.
24 DKDHR
VX Solo II substations
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
VI.GP.P2.02
Zone valve / Thermal actuator TWA-A
Danfoss District Energy