Emerson X-web300 Manual de usuario descargar pdf (Pagina 77)

1592015300 User manual iCHILL 200 L GB r1.3 09/09/2005

37.5 GRAPH: ON / OFF REGULATION OF THE CONDENSER FAN IN CHILLER MODE

37.6 GRAPH: ON / OFF REGULATION OF THE CONDENSER FAN IN HEAT PUMP MODE

38 DEFROST CYCLE

The defrost cycle starts only if all these steps are determined:

 CF02=1 heat pump unit.

 DF01 <>0: defrost enabled.

 Unit working in heat pump mode and at least one compressor running.

 The condenser/evaporator probe is configured (per circuit) (if the evaporator probe/s is/are defined, the defrost cycled is

always controlled by it / them).

38.1 FORCED DEFROST

The function is enabled if the parameter dF19<>0. It allows to make a forced defrost cycle even if the dF09 timeout counting is not

expired, when the condensing/evaporating temperature/pressure is lower than dF20 setpoint for the dF19 time counting.

If during the dF19 time counting the condensing/evaporating temperature/pressure rises above the value dF20+dF21 (set+differential)

the function is disabled and the tF19 time is reloaded.

ATTENTION: the forced defrost is not related to the dF09 /dF06 delay times, therefore the forced defrost cycle, if condition are OK, is

immediately executed.

38.2 COMBINED DEFROST

The function is enabled if one of the digital input is configured as NTC temperature for combine defrost of the 1

or 2

circuit. This

probe detects the external air temperature of the condenser (evaporator in heat pump). and its temperature value determines the start

and the stop of the defrost cycle.

Description of the functioning:

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Emerson X-web300 Manual de usuario Pagina 77