ECH 200 BD
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Every time the external fan is started up, power is supplied to the exchanger fan at maximum voltage, and the fan operates
at maximum speed, for an amount of time equal to Pa F02 seconds; after this time the fan operates at the speed set by
the regulator.
Pa F02 = Fan pick-up time (seconds)
Determines a delay during which it is possible to compensate the different electrical characteristics of the fan drive
motors:
Pa F03 = duration of fan phase shift, expressed in microseconds x 200.
Determines the duration of the TK output piloting impulse in microseconds x 200
Pa F04= triac piloting impulse duration
6.2.2 DRV module
If a DRV three-phase fan module is used, follow the diagram below:
TF: current
transformer
6.3 Reversing valve
The reversing valve is used only when operating in “heat pump” mode.
It is active if:
• relay 3 configuration parameter Pa H23= 0.
• heat pump is enabled, Pa H28= 1.
The reversing valve is off if the instrument is OFF or on stand-by.
Polarity may be configured using the following parameter:
Pa H38= Reversing valve polarity
• 0: relay active in cool mode
• 1: relay active in heat mode
In cooling mode the reversing valve is never active.
6.4 Hydraulic pump
The hydraulic pump must be connected to the output of relay NO2 (refer to connection diagram).
It is active only if the corresponding parameter, Pa H22, is set to 0.
The pump may be configured to function in three different ways using parameter Pa P01:
• Pa P01 = 0 : continuous operation
• Pa P01 = 1 : operation when called up by regulation algorithm (compressor)
• Pa P01 = 2 : cyclic operation
CONTINUOUS OPERATION:
Pump is on at all times.
Pick-up
Phase shift
Impulse duration
Connection
diagram of the
DRV module
Polarity
Continuous
operation
Energy/EWCM
12
TC
12
12
DRV
1
2
3
4
J5=3
J6=on
J7=on1
J8=off
TF
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