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Appendix
sensor position
Note: For plastic pipes
position sensor on metal
boiler coupling
Sensor positioning
on metal pipes
Sensor positioning
on plastic pipes
HW A T -R/-M/-L
Min. 200 mm
Min. 200 mm
Insulation
HW A T -ECO sensor
Aluminium tape
Pipe/boiler coupling
Boiler
Boiler
ATE-180
Electrical scheme
L
N
L L/ N N PE
PE
COM NO
NC
S1 GND S2 GND
Heating cable
HWAT-L/M/R
Pipe temp. sensor Boiler temp. sensor
Temperature sensors
NTC
Alarm 2 A max.
250 Vac
30 mA
MAX.
C 20 A
HWAT-ECO
For multiple unit connection on a three phase system
F1: circuit breaker 3x20 a max. ( c-characteristic)
F2: residual current device 3x30 ma double-pole electrical protection might be
needed to comply with local electrical standards.
For Connection of a single unit:
F1: circuit breaker 20 a max. ( c-characteristic).
F2: residual current device 30 ma.
For multiple unit connection on one phase system:
F1, F3, F5: circuit breaker 20 a max. ( c-characteristic).
F2, F4, F6: residual current device 30 ma.
