11
Electronic continuously variable speed controller
1.96
recirculating air with digital timer and room temperature control, type 30515
Assembly and installation instructions
4.3 Room cooling down prevention
The room cooling down function is superior to all operating modes
and works independently of the external enable contact. The feature
is enabled using the “OFF” position on the speed controller if it is
enabled by DIP switch 4 = OFF. At a room temperature below 5°C,
the room cooling down protection function is active and inactive
at a room temperature above 7°C (the system resumes its original
operating mode). When this function is active, the fan is activated at the
maximum speed set and the valve is opened.
The function is not active if / when:
• there is a motor fault.
• Frost alarm.
• Condensation alarm.
• Temperature sensor line breakage or short-circuit.
4.4 Frost alarm
On delivery the frost alarm is disabled by DIP switch positions 2
and 3 and a jumper between MI1/GND. The DIP switch allows the
multifunctional input to be enabled, among other things, for a frost
protection sensor or a frost protection contact. Frost protection is
superior to all operating modes.
Frost protection contact:
The frost protection contact is enabled when
DIP switch 2 is set to ON and DIP switch 3 is set to OFF. The frost alarm
is inactive if the contact is closed. The frost alarm is active if the contact
is open.
Frost protection sensor:
The frost protection sensor is enabled when
DIP switch 2 is set to OFF and DIP switch 3 is set to OFF. The switching
threshold for the frost protection sensor is 8°C.
When the frost alarm is active, the valve is open in heating and cooling
mode and the fan is switched off. The fault must be reset by turning the
speed controller to Off of by switching off the mains power supply. If
the error is not rectified, the fault cannot be acknowledged. As soon as
the fault has been successfully acknowledged, the system returns to its
original operating mode.
Содержание 30515
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