OSTBERG HERU 400-2400 S, Руководство пользователя

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Climatix HERU® 400-2400 2017-11-03
SERVICE Climatix HERU®
4. CONTROL SYSTEM Function description
CONTROL
Operating times
The unit is controlled via a built-in timing channel.
At start-up, the ST1/ST2 dampers open. After a set time, the extract air fan (FF) starts
and heat recovery (EMS) is controlled to maximum recovery, if the outside
temperature is under the adjustable set value (15°C). The supply air fan (TF) then starts
after an adjustable time delay, and normal regulation starts. When the unit is stopped,
first the fans will stop and then the ST1 and ST2 dampers will close according to the set
time, with control voltage or spring return.
Timer/Boost
The unit is controlled to the set fan stage for prolonged operation or boost during the
set time via push button TM1, push button timer (time in timer) or pulse-controlled
push button (spring return with adjustable time in PROC1).
Circulation pumps
Circulation pump heating CP1 switches on automatically when heating is required or at
outside temperatures below the minimum setting (adjustable in HMI). Exercised once
a week.
Circulation pump cooling CP2 switches on automatically when cooling is required, if
pump is blocked or if outside temperature is lower than minimum value (adjustable in
HMI). Exercised once a week.
Cool down of electric heater
If electric heating is configured and the unit is stopped, the supply air fan will switch
over to prolonged operation to cool down the electric heater. ST1 and ST2 remain
open during cool down.
Rotary heat exchanger
Time-controlled blow-off when the unit is stopped or when heating is not required.
Control is integrated in EMS.
REGULATION
Temperature regulation
The supply air temperature is regulated via GT1.
When the heating requirement increases, temperature is regulated according to the
following sequence:
1. Cooling valve SV2 closes or cooling unit KM1 begins decreasing output.
2. Heat exchanger EMS increases heat recovery if GT2 > GT3.
3. Heating valve SV1 opens for heating, or electric heater EHC begins increasing
output.
For reduced heating requirements/increased cooling requirements, the above
sequence is reversed.
Models with DX cooling and heating pumps and integrated heating:
1. The CHP cooling and heating pump begins decreasing cooling effect.
2. Heat exchanger EMS increases heat recovery if GT2 > GT3.
3. The CHP cooling and heating pump begins increasing heating effect.