Manual pCoOEM Bicircuit - Rhoss
Manual pCoOEM Bicircuit - Rhoss
Manual pCoOEM Bicircuit - Rhoss
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5.4 Calculation of the request in air/water units<br />
5.4.1 Used inlets<br />
• Water temperature analogue inlet, evaporator-condenser inlet<br />
• Digital inlet of summer/winter commutation.<br />
5.4.2 Used parameters<br />
• Summer regulation setpoint<br />
• Winter regulation setpoint<br />
• Temperature regulation band<br />
• Unit selection air/water type<br />
5.4.3 Used outlets<br />
• All the outlets reserved at the compressors<br />
5.5 Working description<br />
The calculation of the thermostatic request of the unit is based on a control of proportional type<br />
with lateral band, based on the temperature measure of the inlet water to the evaporator/<br />
condenser coil. If the unit is in chiller mode or heat pump the regulation band will be fixed at the<br />
right or left of the setpoint respectively.<br />
5.5.1 Temperature regulation in chiller mode<br />
Regulation example of the temperature in single-compressor units<br />
PWR<br />
STEP1<br />
STPM<br />
EIWT[°C]<br />
BND<br />
PWR Integrated power<br />
STEP1 Power step 1<br />
STPM Main regulation setpoint<br />
BND Regulation band<br />
EIWT[°C] Evaporator inlet water temperature<br />
There are 2 possible ways of compressor management: grouped and equalised. For default is<br />
equalised.<br />
The selection is done by the “En.layer device” parameter in the “configuration menu”.<br />
Example<br />
of grouped regulation (En.layer device=N) in twin-circuit four-compressor units:<br />
<strong>Rhoss</strong> S.p.A. S.A.T.<br />
Rev. 1.0 20/01/05 18
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