Komfovent C3.1, User'S Installation And Operation Manual

EN

UAB KOMFOVENT we reserve the right to make changes without prior notice

14

C3.1-16-01

2.5.4.1. Air handling unit settings 
Temperature control

The air handling unit provides for several temperature control modes:

•  Supply

. The unit supplies air according to the temperature preset by the user.

•  Extract

. Unit automatically supplies air of such temperature to maintain preset 

exhaust air temperature.

•  Auto.

 When cooling is needed, unit will work in the extract air temperature 

maintenance mode. If the outside temperature will be few degrees lower than 

set value, control automatically will switch to supply air maintenance mode. 

Note. This setting is not intended in supply air units (OTK).

Air volume control

Supply and exhaust air volumes control modes have been provided in the unit:

•  CAV

 – constant air volume control mode. The unit will supply and extract a constant air flow which is preset 

by the user, irrespective of any changes occurring in the ventilation system;

•  VAV

 – variable air volume control mode. The unit will supply and extract an air flow with regard to the 

ventilation needs in different rooms. In case of frequently changing ventilation demands this air volumes 

maintenance mode signally reduces unit exploitation costs.

Menu window for air flow control is intended only in units with EC fans.

It is possible to use a simplified VAV control function, “single-flow VAV control”. It means that the perfor

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mance of this function requires only a single air flow pressure sensor, which is installed in a variable air duct 

system (e. g. in supply air). This variable system is called the master ventilation system, according to which 

control is performed, while the other air flow (in this case, discharged air) operates as the slave ventilation sys

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tem and always follows the master one. If the supply air requirement in the ventilation system which is assigned 

as the master system decreases, the intensity of discharged air in the slave system is reduced correspondingly 

by the same percentage.

If the variable air volume control function is mode is selected, the initial 

calibration of the control mode must be performed; otherwise, the unit 

will not operate if the VAV mode is selected.

Variable air volume control mode calibration:

1.  Before start of calibration the air distribution and exhaust devices in ventilation system should be adjusted, 

all valves for variable air flow in a way enabling air supply to all ventilated premises should be opened. 

2.  After switch on of the unit the VAV mode should be selected and calibration procedure should be confirmed. 

After the end of the calibration, depending on the configuration of pressure sensors, VAV mode status will 

change to Supply, Extract, Double.

3.  After calibration the air handling unit further will operate in the previous mode.

Time / Date

Time and date is required for air handling unit operation planning.

Season

For the air handling unit operating in most economical mode, summer and winter seasons have been provided.

•  By setting “Winter” season, unit cooling function is blocked. 

•  By setting “Summer” season, unit heating function is blocked. 

•  By setting “Auto”, automatic season selection will take place. Depending on 

the heating and cooling demand, the season is selected automatically.

2.5.4.2. Personalization

In this item for the user are presented menu language, measurement units and 

other control panel settings. 

Reset settings

Air handling unit

Temperature control

Flow control

Time/Date

Season

Personalization

Language

English

Flow units

m

3

/h

Screen saver

On

Panel lock

Off

Touch sound

Click