Rev. d 01/1 7
DMP052E
MODE A2
DEHUMIDIFICATION LOOP
If the output value must increase when the
SH
Humidity Sensor value goes above the operating
set. When the set point is achieved the output is zero.
If the
SH
Humidity Sensor value exceeds the SPD Dehumidification Set Point value plus BPD
Dehumidification Proportional Band, the relevant analogue output goes to 100% equivalent to
10Vdc
.
MODE A3
ENTHALPY CONTROL WITH SUMMER/WINTER CHANGEOVER SET
It enables the Enthalpy Control with summer/winter changeover set point through (D.i.2) contact.
By D.i.2 open contact, the loop goes in Enthalpy control with winter set-point, by closed contact,
loop goes in 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, as well as the (LLA) minimum opening limit value.
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 a time exceeding 15
min. to avoid output hunting when the enthalpy values are almost the same.
MODE A4
: HUMIDIFICATION/DEHUMIDIFICATION
SEQUENCE LOOP
To be selected when it is required to exploit the 0-5, 6-10
control characteristics of Controlli actuators to perform a
humidification/dehumidification sequence with a unique 0-10
Vdc output, driving in sequence proportional humidifier and
cooling valve.
When the set point value is achieved, the output is 5.5 Vdc
When the control humidity drops under the (SPH) humidity set
point minus (BPH) Humidity Proportional Band, the relevant
analogue output is 0 Vdc.
When the control humidity exceeds the (SPD) Dehumidification Set Point value plus (BPD)
Dehumidification Proportional Band, the relevant analogue output is 10 Vdc.
The two actuators must be connected in parallel to the same output setting the range 0-5Vdc with
reverse action for the actuator which drives the proportional humidifying channel, whilst for the
actuator which drives the cooling channel it is necessary to select the range 6-10Vdc with direct
action.
