Operation Manual

5
TR 21
6 720 610 267 (00.02)
Safety Instruction
This appliance may only be installed by a properly
qualified person and as shown in the wiring dia-
grams. The applicable safety regulations must
also be observed.
1 Details of Appliance
Room thermostat for the listed modulating-con-
trol central heating boilers.
This room thermostat is intended exclusively for
temperature control in dry and closed rooms with
normal ambient conditions.
2 Technical Data
3 Fitting
y Fit room thermostat as shown in Figures 1
to 4.
4 Electrical Connections
y
Use wires conforming at least to NYM or
H05VV- ... with the following cross-sectional
areas:
y
All 24-V wires (measurement current) should
be routed separately from 230-V or 400-V
wires in order to prevent inductive interfer-
ence (minimum separation 100 mm).
y
In cases where there is inductive interference
from external sources:
(e.g. power cables, overhead tram cables,
electricity substations, radio and TV equip-
ment, amateur radio equipment, microwave
appliances, etc.), use shielded wires.
y
Connect up room thermostat as shown in
Figures 5 to 7.
Rated voltage 24 V DC
Rated current 0.01 A
Thermostat output,
continuous 2.5 V ...24 V
Minimum Temperature
change rate 0.05 K/Min.
Permissible ambient
temperature 0 °C...35 °C
Protection class III
Testing class IP 20
Table 1
English
Cable length:
Cross section:
£ 20 m 0,75 mm
2
...1,5 mm
2
£ 30 m 1,00 mm
2
...1,5 mm
2
> 30 m 1,5 mm
2
Table 2