Honeywell EN2H-0221GE51 R0808 service manual Heating circuit room factor, Example

Hydraulic Components SDC / DHC

Room sensor off, At this setting the room sensor is only used as a display device operation active without influencing the room temperature-related functions. The

operation of the wall device is possible without restrictions.

Application All system layouts that exclude room influence while the display of the actual room temperature is still required (in contrast to setting OFF).

See also 5.4.4 "Direct heating circuit" menu (UNMIXED CIRC), Pg. 92

7.3.4.2Heating circuit room factor

Function This function determines to what extent a deviation of the room temperature from the setpoint affects the control of boiler flow temperature.

If there is no difference between the desired (TARGET) and the current (ACTUAL) room temperature, the direct heating circuit's flow temperature is controlled according to the set heating curve.

If there is a difference between the room temperature and the setpoint, the heating curve is shifted parallel to the room temperature axis so that the deviation is compensated. The amount of the displacement depends on the setting of the room factor.

The following relation applies:

⎛ Deviation	x Room factor ⎞
Corrected room setpoin t = Set room setpoin t − ⎜	100	⎟
⎝		⎠

Example:

set room setpoint = 21°C

actual room temperature = 20°C Deviation = -1 K

For a room influence of 100%:

Corrected room setpoin t =	⎛ − 1 K x		100 ⎞	=	22 °C
	21 °C − ⎜	100	⎟
	⎝		⎠

The boiler temperature is controlled according to a heating curve which corresponds to a room temperature setpoint of 22°C.

170 EN2H-0221GE51 R0808