User's Manual

DRAFT 66 8003 002-11

If '2-pipe fan coil with automatic switching' is chosen at Type, the alternatives

Pipe sensor and Trigger level will be shown.

1. If the pipe sensor is a bimetal switch (open or

closed depending on the temperature it senses),

choose at Pipe sensor the applic able one of

'Cooling' and 'Heat ing'.

2. Ifthepipesensorisan1k NTC resistor,

Trigger level (in the range 0-100%) for

switc hing between heat and c ool should be

entered. When the t emperat ure reac hes the

switch-over-temperature (default 3 ºF; this is

chosen under the Deadband alternative in the

Thermostat profile details dialog, see Figure

57), it is c hecked whether the pipe sensor has

reached the trigger level so that the thermostat

can change mode from heating to cooling or

vice versa.

Note:

When '2-pipe fan coil with automatic

switc hing' is c hosen as HVAC type, t he c ooling

relay (Y

) is the only relay that applies, forc ed by

the thermostat.

Figure 56

Figure 57