RCF manual Chapter 12 Fan control 33
Number of
Description
Factory
25
Configuration of fan control:
0=No control, 1=The fan is controlled by heating requirement,
2=The fan is controlled by cooling requirement, 3=The fan is
controlled by both heating and cooling requirement.
When using an electric heater this parameter should only be set
to 1 or 3, otherwise there is a risk of overheating.
3
Mould protection
When this function has been configured, the fan will always run at the lowest speed and
circulate air in the room to minimise the risk of mould growth in the fan-coil unit. The
function is deactivated on delivery.
Prevent manual fan control
This function prevents manual fan control in cases where the cooling/heating control signal
should have no influence on the fan. Observe that, if the function is active when fan control
is simultaneously set to follow neither the cooling nor the heating signal, it will not be
possible to control the fan using the fan button. The function is activated/deactivated in
parameter 66 and the fan, if active, will follow the behaviour according to the schematic for
parameter 25, below.
The function is structured as detailed below:
Setting of parameter 25
Manual fan control available?
If heating signal If cooling signal
0 = The fan is controlled neither by cooling or heating
No No
1 = The fan is controlled by heating demand Yes No
2 = The fan is controlled by cooling demand No Yes
3 = The fan is controlled by both cooling and heating
Yes Yes
Fan kickstart
When using today’s energy-saving fans, there is always a risk the fan will not start due to the
low control voltage preventing the fan from exceeding its starting torque. The fan will then
remain at a standstill while power still flows through it, which may give rise to damage. The
kickstart function ensures fan output is set to 100 % for a set time (1...10 s) thereby making
sure the starting torque is exceeded. Kickstart is activated when the lowest fan speed is
selected. The function is also active during manual fan control. After the set time (1…10 s)
has elapsed, the fan will return to its original speed.
Cooling when using electric heater
When using RCF-230CTD(-EC) with an electric heater, the fan will run for an additional 2
minutes after the heater has been shut down in order to cool it off.
NOTE: RCF-230CTD(-EC) has no indication capable of showing if the fan breaks or if the
heater should overheat. This requires all safety connections to be made externally. An
overheating protection or similar can be used to cut the supply voltage.
To Next Page
Loading...
Need help?
General
