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SEC electronical controller can perform device ON / OFF from the dry contact information it gets from the
building automation system or similar system (VRV, VRF controller, timer etc.). By a dry contact on the relay
card connected to the BMS input; when dry contact is ON (short circuit) the device is activated and starts to
work in the position where previous closed. In this case, by using the front panel interfering device ON /OFF
equipment position change operations can be performed. When the dry contact is off, the device closes down
and you can’t interfere to the device from the front panel.
When the optional filter sensor detects the dirty filter,
‘’AL 03’’ warning will be shown on screen. When this
warning is shown, the device will run properly, however the warning will be shown until the filters are cleaned.
Optionally, there is a system which prevents freezing plated heat recovery under low temperature. When icing
is determined in the plated heat exchanger, fresh air fan will stop and exhaust fan will work at maximum stage
for defrosting. After defrosting, the device will return to its normal working conditions. Under these
circumstances ‘’AL 07’’ will be shown on screen. Commands from the front panel will not run.
Optionally, there is By-pass damper control. Damper will be automatically ON or OFF position depending on
the outdoor and room temperature information. If fan is selected in by MODE the damper is OFF.
Optionally, there is a control of air quality.
The fan in AUTO (FAN1, FAN2 or BOTH) changes fan speed according to the information from sensors.
14.2.
Functional Electronic Controller (FEC)
VENCO VHR type heat recovery unit control functions are;
Unit ON / OFF
FAN 1 ( Supply fan ) Speed control as 5 step and automatic
FAN 2 ( Exhaust fan) Speed control as 5 step and automatic
Heat, cool and fan mode
Image 14.2.1. Electronic Controller Buttons
Button
Name
Description
ON / OFF
Unit will be ON or OFF.
MODE
Select Running Status
(Cooll
, Heat
or Fan
)
FAN
Fan1 and FAN2 stepped control
button.
Value Increase
Increases of the set value.
Increases the value of selected by
fan button area.
Summary of Contents for VHR Series
Page 8: ...2019 10 8 31 Table 3 2 Dimensions for VHR and VHR EC Models...
Page 23: ...2019 10 23 31 17 APPENDIX 17 1 APPENDIX 1 Standard Controller SEC Electrical Wiring Diagram...
Page 24: ...2019 10 24 31 17 2 APPENDIX 2 Functional Controller FEC AC FAN Electrical Wiring Diagram...
Page 25: ...2019 10 25 31 17 3 APPENDIX 3 Functional Controller FEC EC FAN Electrical Wiring Diagram...
