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| Start-up, adjustments, use, commissioning and unit in hipernation
K.5.13
Filter guards
Filter guard over pre-filter and primary filter installed and connected to the controller for display of alarm when the me-
chanically set limit is exceeded. Filter alarm will be displayed on the Systemair Control Panel.
K.5.14
Room temperature sensors
One or two external room temperature sensors are available. The cabinet has been prepared with additional terminals
for connection of the room temperature sensors. The sensors are delivered without cable. The controller calculates an
average of the value from the 2 sensors as input for the control.
K.5.15
Frost protection
For the frost protection of the heating coil, the water temperature in the coil is transmitted to the controller by a tem-
perature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that
keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the run-
ning mode is “off”.
If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is
activated.
From Systemair every heating coil for hot water is provided with a little pipe at the collection pipe for the return water.
This little pipe is prepared for the installation of the above mentioned temperature sensor for the transmission of the re-
turn water temperature to the controller.
K.5.16
Systemair Control Panel - NaviPad
The separate cable-connected (3m) hand terminal with touch screen — the NaviPad is always necessary for the normal
handling and programming, because the main controller — Access — is without display and buttons.
K.5.17
Cooling recovery
If the extract air temperature is lower than the outdoor air temperature, and there is a cooling demand in the rooms,
the cooling recovery will be activated by reversing the heat exchanger signal. The signal is increased to the cooling re-
covery by increasing cooling demand.
K.5.18
Free cooling
A temperature sensor has been installed inside the unit in the outdoor air entrance. If the outdoor temperature after
midnight is below the room temperature set point and the actual average room temperature is above the set point
temperature, the fans start during the summer to cool down the building during night hours.
K.5.19
Alarm signal
By alarm there are 24 V DC on terminals in the cabinet. Lamps and cables are not available from Systemair.
K.5.20
Heat recovery
The heat recovery capacity is controlled by modulating speed of the rotor.
K.5.21
Frost protection – plate heat exchanger
Signals from a temperature sensor mounted in the airflow after the plate heat exchanger are transmitted to the control-
ler for frost protection of the plate heat exchanger.
K.6
Commissioning
When the installer has completed the installation and wants to hand over the finished installation to his customer for
payment the commissioning protocol can be the written receipt for the full ended job. Fill in the blank spaces and sign
the proposed commissioning protocol that is Annex 9, or fill in the Word-file with a Commissioning Protocol that is avail-
able from your local Systemair office.
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