Honeywell EN2H-0221GE51 R0808 ユーザーズマニュアル

SDC / DHC 

Control Functions 

EN2H-0221GE51 R0808 

121 

Function active only when using a second outside sensor! 

 

If in the central device a second outdoor sensor (AF2) was 
connected to a variable input and registered, the heating circuit 
can be assigned either to the outside sensor 1, 2 or to the mean 
value of both sensors. 

 

For each outside sensor the following applies: 

In case of a defect affecting a sensor, switching to the remaining 
outside sensor with simultaneous fault indication occurs 
automatically. In case of a defect affecting both sensor circuits the 
heating circuit is regulated on the basis of a set heating 
characteristic curve and heating program corresponding to a 
fictitious outside temperature of 0°C with regard to the set 
minimum temperature. 

 

5.2.5 "Direct Heating Circuit" / "Mixed Heating Circuit 1" / "Mixed 
Heating Circuit 2" menu, Pg. 78 

 

If a connected outside sensor fails during weather condition-
controlled operation (sensor short-circuit or interruption), 
emergency operation takes effect. 

Weather condition-based control then adjusts the temperature 
based on an assumed fixed outside temperature specified via a 
parameter value. 

Characteristic curve for 
emergency operation without 
outside sensor 

SYSTEM 29