Cancelling switch-off

Control Functions	SDC / DHC

The switch-off is cancelled when the current outside temperature drops below the set value by more than 1 K

The summer switch-off function is cancelled:

•in case of an outside sensor defect

•in case frost protection is active

NOTE The HEATING LIMIT parameter can be used to assist the summer switch-off function. This function allows setting non- heating periods on warm days for each individual heating circuit.

In connection with a second outside sensor, the current averaged outside temperature is accepted for summer deactivation if the average value of both sensors is specified during outside sensor assignment.

Active summer deactivation is represented by a beach umbrella symbol in the basic display. In case of separate operation of the heating circuits ("System Parameters" menu, Control Mode parameter) the symbol is not displayed. If two outside sensors are connected and they were assigned to different heating circuits, the symbol is furthermore only displayed if both sensors fulfil the condition for summer de-activation.

See also 5.2.3 "System Parameters" menu, Pg. 72

6.8.8System frost protection

Function To avoid the freezing of the heating system in switch-off mode, the controller is equipped with electronic frost protection.

Operation without room temperature sensing

If the outside temperature (current value) drops below the set limit, heating is turned on again. Heating is interrupted if the outside temperature exceeds the set limit by 1 K.

124	EN2H-0221GE51 R0808

EN2H-0221GE51 R0808 specifications

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Honeywell EN2H-0221GE51 R0808 service manual Cancelling switch-off, System frost protection

Models: EN2H-0221GE51 R0808

SDC / DHC