22
912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
When connecting the user module to a system operating at low temperature, install an off-the-shelf manually resettable
contact thermostat (calibrated to 50°C) in order to protect the floor system from elevated temperatures due to possible
faults in the adjustment system.
Mount the thermostat on the low temperature delivery line upline from the distribution manifold to the various loops and
distant from the user module delivery connector (> 1m).
attention: Make sure low temperature operation is enabled. Electronic board switches 4 and 5 (climate curve
switches) must be OFF
.
SWITCH 4 = OFF
SWITCH 5 = OFF
14. CONNECTING THE FLOOR OVERHEATING THERMOSTAT
This selection allows central heating temperature to be adjusted by turning the heating water adjustment potentiometer
(
TCH
) on the electronic board. The temperature range is 25 ÷ 40 °C.
Electrical connection of thermostat
r BDDFTTUIFFMFDUSJDBMDPNQPOFOUTBTEFTDSJCFEJOQBSBHSBQI
r SFNPWFUIFKVNQFSPOUIFFMFDUSPOJDCPBSEUFSNJOBMT $/&% TFFXJSJOHEJBHSBNTJOfBOE'JHVSF
r UISFBEUIFUXPXJSFDBCMFDPNJOHGSPNUIFUIFSNPTUBUUFSNJOBMTUISPVHIUIFHSPNNFUTPGUIFFMFDUSJDBMCPYBOE
connect it to these two terminals (using a harmonised cable “HAR H05 VV-F” 2 x 0.75 mm2 with a maximum diameter
of 8 mm).
Safety thermostat tripping
If the safety thermostat trips due to a fault in the adjustment system, the user module stops for safety reasons and the
red
LED DL12
shines on the electronic board (see § 23).
After checking the reason for the overheating, restart the system by pressing the safety thermostat reset device and mo-
mentarily disconnecting the power supply from the module (this operation is required in order to cancel the block from the
board memory: the red LED DL12 flashes).
0904_2409 / CR_0028
Figure 12: Connecting the low temperature safety thermostat
0904_2410 / CR_0025
SIRIUS SAT BOARD
SIRIUS SAT DUAL-ZONE
LOW CLIMATE CURVE
RESETTABLE
SAFETY THERMOSTAT
Connector on board
to wire
Resettable safety device to mount
on low temperature zone heating
delivery piping only
