UAB AMALVA we reserve the right to make changes without prior notice
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V2-C5-15-03-v1
Combi-coil control function must be ordered in advance.
6.12.2. Multi-level control of direct evaporation cooler
For air cooling in the air handling unit there is provided 3 control contacts (connection is shown in Picture 5.3 b).
Depending on how much will be cooling steps and how it will be divided on steps, automatically will be selected
optimal control method. If the capacity of all steps is the same, then only three control steps are possible. If cooling
capacities of steps are close to ratio 1-2-4 (the capacity of each of the following steps is double the previous), then
cooler control will be realized with seven cooling steps.
Example: To the terminals DX1 is connected 1kW cooler, to DX2 – 2kW and to terminals DX3 connected cooler
with 4kW capacity. Control will be in steps:
1: 1kW; 2: 2kW; 3: 1kW+2kW; 4: 4kW; 5: 1kW+4kW; 6: 2kW+4kW; 7: 1kW+2kW+4kW.
The function of step rotation is provided, when capacities of coolers are
the same.
The number of direct evaporation cooling units must be provided in ad-
vance.
6.12.3. Reversal of direct evaporation coolers
There is a reverse option of direct evaporation coolers, i.e. when the cooler is switched to the heating mode. In
such case, there must be only max 3 cooling control steps. There are control terminals for connection of the cooler
reversing signal “Heating” (Pic. 5.3 b.).
The option of reversal of direct evaporation cooling units must be provided
in advance.
6.12.4. Inverter direct evaporation cooler control
There is an inverter unit control which power can be managed smoothly. For the inverter unit power control, there
is a modulated signal (TG2), as well as signals: cooler start (DX1), cooling demand DX2, heating demand DX3
(see Pic. 5.3 b).
There are three different control methods:
1. Universal control, suitable for most cooler units.
2. Control adapted to Panasonic cooler units.
3. Control adapted to Daikin cooler units.
The inverter cooling unit controls should be provided in advance.
6.12.5. Additional zone control
By connecting the additional extension module to the air handling unit, the supply air temperature is maintained in
a separate ventilated area (room), i.e. the module has the option to independently control additional heaters and
coolers. In this case, the user can have a separate temperature setting for the particular area:
There is a possibility to control up to 2 additional areas (two additional extension modules).
Detailed information is presented in the additional zone installation manual.
