Operating Mode; Versions Dmh, Dmh-C - AERMEC DMH Serie Manual De Instalación

Parameter Default Range
H01 12 7.0 – 12.0
H02 20 15.0 – 25.0
H05
30 25.0 – 35.0
H06 15 10.0 – 30.0
T0
120 0 – 120
T1 120 0 – 240
T1 120 0 – 240
H13 0 0
H14 0 0
H15
0 0
H16 0 0
H18
0 0-255
H21 0,5 0-1
H22 0,5 0-1
H23 1 0-1
H33 1 0-1
H34
4 0.0-15.0
H50 0 0-1
H51
1 0-1
H52 1 0-1
H53 1 0-1
H54 55 30.0-90.0
Parameter Default Range
D01 1 0-1
D07
2 2-150
D08 240 2-255
Parameter Default Range
AL1 180 0-255
AL2 3 0-255
AL7 3 0-255

OPERATING MODE

In all functioning modes, the on-board electronics check the water and air inlet temperatures to ensure that they are compatible with the selected functioning mode. The
actual activation of the valves, fan and compressor will be linked to the upstream consent chain (humidistat/thermostat, water and air inlet temperatures).

VERSIONS DMH, DMH-C

If digital input ID4 is open, the unit is set to operate in summer dehumidification mode.
Activation is by means of a humidistat (not supplied) connected to the ID3 digital input (potential free contact) which, when closing, activates the voltage outputs in this order:
— R04: Cooling water circulator/shut-off valve consent (not supplied)
— R03: Fan start consent
— R01: Compressor start consent, with delay T1 with respect to the fan
The lighting of LEDs L1 and L2 in fixed mode confirms that the compressor and fan are running; they flash if the compressor and fan are switched on with a preset delay.
When the humidity set point is reached, the compressor, fan and valve are switched off, the latter with a delay of T1 in relation to the compressor.
In dehumidification mode dEh, the supply air is:
— Dehumidified and neutral in the DMH version
— Dehumidified and cooled in the DMH-C version.
To prevent frost formation on the evaporator, a timed defrosting procedure is provided (parameter d01), which involves stopping the compressor momentarily and restarting
it later.
The unit can also function as a winter forced air heater, as long as a bipolar summer/winter switch is connected as shown in the diagram below. In the winter position, the
switch closes the ID4 input automatically disabling the compressor, and the thermostat provides heating consent (switch and thermostat not supplied). This mode is indicated
on the display by the word FAn.
21.10 – 5899000_03
Table of adjustment parameters
Branch CFn / BranchdFr / BranchALL
Unit Description
°C Min inlet water temperature value in DEHUMIDIFIER mode
°C Max inlet water temperature value in DEHUMIDIFIER mode
°C Min inlet water temperature value in WINTER FORCED AIR HEATER mode
°C Min inlet air temperature value in DEHUMIDIFIER mode
sec Condition check time (a) on air [S02>=H06] in DEHUMIDIFIER mode
sec Condition check time (b) on water [H01>=S01>=H02] in DEHUMIDIFIER mode
sec Condition check time (d) on water [S01>=H05] in WINTER FORCED AIR HEATER mode
°C S1 probe offset
°C S2 probe offset
°C S3 probe offset
°C S4 probe offset
No(3) Manufacturer password for programming access
°C S1 probe hysteresis
°C S2 probe hysteresis
[no.] Enabling autostart [0=disabled; 1=enabled]
[no.] Enabling condition 1 [0=disabled; 1=enabled]
[°C] Temperature difference measured by probe S3 during interval AL1
[no.] Enabling compressor stop [0=disabled; 1=enabled]
[no.] Meaning ID2 [0=low pressure switch; 1= summer integration]
[no.] Forces summer integration request [0=disabled; 1=enabled]
[no.] High pressure detection function from probe S4 [0=disabled; 1=enabled]
[°C] Trip threshold of S4 for high pressure detection
Branch dFr
Unit Description
[no.] Defrost enabling [0=disabled; 1=enabled]
[min] Duration of defrost cycle when d02=2 (timed end)
[min] Maximum cycle time
Branch ALL
Unit Description
Low pressure alarm delay from compressor start (H51=0)
sec
High/low pressure alarm delay from compressor start (H51=1)
No(3) Number of low pressure events/hour for switching from automatic to manual rearm (H51=0)
Number of high pressure events/hour for switching from automatic to manual rearm (H51=0)
No(3)
Number of high/low pressure events/hour for switching from automatic to manual rearm (H51=1)
15