TOPVEX FC OPERATING MAINTENANCE 125918A003
Table Of Contents
- 1 Warnings
- 2 Product Description
- 3 Interface Description
- 4 Commissioning
- 5 Maintenance
- 5.1 Important
- 5.2 Maintenance intervals
- 5.3 Maintenance instructions
- 5.3.1 Open the doors
- 5.3.2 Changing Supply/Extract air filter
- 5.3.3 Checking the heat exchanger
- 5.3.4 Checking the fans
- 5.3.5 Checking the Hot water heating battery
- 5.3.6 Checking the Electrical heating battery
- 5.3.7 Cleaning the extract louvers and inlet diffusers
- 5.3.8 Checking the outdoor air intake
- 5.3.9 Checking the duct system
- 5.3.10 Changing the Internal Battery
- 6 Troubleshooting
- 7 Service
Commissioning
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21
4.5 Defrost function
By measuring the pressure difference over the exchanger the need for defrosting can be detected. The differential
pressure transmitter is auto calibrated by the system to obtain the correct pressure in relation to the airflow. Manual
calibration is possible, e. g. after cleaning of exchanger.
The bypass damper opens to reduce the flow of cold outdoor air through the heat exchanger. When the bypass defrost-
ing is initiated the supply temperature is allowed to decrease 4K from the setpoint. If the actual supply air temperature
is decreased more then -4K a stop defrost sequence will be initiated. If stop defrost is not allowed, the unit will stop
and the alarm Analogue deicing is presented in the display.
Table 1
Exchanger deicing
Yes
Set if exchanger deicing will be used, Yes/No
Bypass
On
Exchanger deicing allowed with bypass, On/Off.
Stop deicing
On
Exchanger deicing allowed with stop of the supply air fan (SAF),On/Off
Activation temp
0.0
Outdoor temperature limit to allow deicing function
Stop temp SAF
-8
Outdoor temperature limit for forced stop deicing, interlock of bypass deicing
Setp Press dev
50%
Setpoint in percent of the pressure deviation to start deicing
Stop hyst
60%
Reduction of the pressure deviation in percent to cancel deicing.
125918 | A003