Honeywell EN2H-0221GE51 R0808 Discharge to heating circuits, Exhaust gas temperature monitoring

Hydraulic Components SDC / DHC

Discharge to heating circuits

Any excess heat is dissipated into the heating circuits. The set maximum temperature is not exceeded here. The intended room temperature may be exceeded for short periods. If the respective circuits are equipped with room stations, the thermostat function should be activated.

ATTENTION

For floor heating a contact thermostat must be installed to control forced switch-off of the pumps.

Dissipation into buffer tank

Any excess heat is dissipated into the buffer tank, without exceeding the set maximum temperature.

7.1.19Exhaust gas temperature monitoring

NOTE Only if parameter 8 variable input 1 = 16 - Flue gas sensor set in the "Hydraulics" menu.

A flue gas sensor can only be connected to the variable sensor input VI 1. Due to the high temperatures involved, a PT 1000 sensor is used for this purpose. The control device automatically evaluates the sensor data, which are different from the data supplied by the standard sensors.

When a sensor fault is detected with the flue gas sensor active, and if flue gas monitoring was set for temporary disable or permanent inhibit (safety functions), there will be a heat generator switch-off in addition to the malfunction message.

Function This function controls the necessary measures in case the flue gas temperature exceeds the allowable limit.

Display of flue gas temperature only

No follow-up function; the actual flue gas temperature is displayed in the Information display.

Heat generator lock if limit value is exceeded for set time

When the temperature limit is exceeded the heat generator is disabled for the set time and a fault message is sent.

Heat generator lock if limit value is exceeded

142 EN2H-0221GE51 R0808