ECH 200 BD
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Outdoor fan in HEAT mode
Speed: fan speed
Temp: temperature
Press: pressure
Control is not active if:
• defrosting is in progress
• the boiler is on
8.5.3 Reversing valve control
Refer to section on reversing valves.
8.5.4 Hydraulic pump control
Refer to section on the hydraulic pump.
8.5.5 Anti-freeze/supplementary electrical heater control
Electrical heater control employs two separate set points, one for heating mode and one for cooling mode:
• Pa r07: electrical heater 1 set point in heating mode
• Pa r08: electrical heater 1 set point 1 in cooling mode
The two set points of the anti-freeze electrical heaters fall between minimum and maximum values which the user may set
using the following parameters:
• Pa r09: maximum set point of anti-freeze electrical heaters
• Pa r10: minimum set point of anti-freeze electrical heaters
When off or on stand-by, control is based on the cooling set point, using the control probe used in the heating mode
.
Parameter Pa R11 determines the hysterisis around the set points for the anti-freeze/supplementary electrical heaters.
An example of operation is shown in the diagram below:
Fan control in
heat mode:
diagram
Temp/Press
Pa F11
Pa F10Pa F18
Pa F17
Pa F20
Pa F11
Speed (%)
Pa F19
Pa F16
Pa F15
OFF
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