Rev. d 01/1 8
DMP052E
FOR THE DIGITAL RELAY OUTPUT 2 IT IS POSSIBLE TO SELECT:
MODE D1
: ON/OFF HUMIDIFICATION HYSTERESIS
If the output value must turn to ON when the value of
H
Humidity Sensor drops under (SPH)
operating humidity set value minus (BPH) hysteresis band.
When the set point is achieved the relay output is OFF.
MODE D2
: ON/OFF DEHUMIDIFICATION HYSTERESIS
If the output value must turn to ON when the value of
H
Humidity Sensor exceeds the SPD operating dehumidification
set point plus (BPD) hysteresis band.
When the set point is achieved the relay output is in OFF status.
MODE D3
: ENTHALPY HYSTERESIS WITH S/W
CHANGEOVER SET
If the enthalpy control with S/W changeover set through (D.i.2) contact input is required.
By D.i.2 open contact, the loop goes to enthalpy control with winter set-point; by closed contact the
loop goes to enthalpy control with summer set-point.
The two sets STI winter and STE summer are independent.
The (BEI) internal and (BEE) external proportional bands are always the same both in winter and in
summer.
By outdoor humidity signal it is necessary to set also SHI and SHE winter and summer humidity set
points and (bPH) humidity band.
The comparison between internal and external enthalpy must last for at least 15 min. to avoid
output hunting when enthalpy values are almost the same.
MODE D4
: ON/OFF DELAY
If it is required to enable or disable a relay output with a specified stop and/or start delay.
The operation is the same as described for mode D4 of the Relay 1 digital output (see page 6).
