Manual pCoOEM Bicircuit - Rhoss

Defrost temperature circ-1 B3 pGE B3 conf. NTC (like for single circuit)
Recovery temperature 1 / Outside air B4 pGE B4 conf. NTC (like for single circuit)
temperature
Recovery temperature 2 B5 pGE B5 conf. NTC (like for single circuit)
Condenser pressure circ-1 B6 pGE B6 conf. 0-5V (like for single circuit)
Water outlet temperature circ-2 B7 pGE B7 conf. NTC
Defrost temperature circ-2 B8 pGE B8 conf. NTC
Condenser pressure circ-2 B9 PCOE address 0 B1 conf. 0-5V
2.5 Considerations
The way of working decided for the digital inlets (except the remote On/Off inlet) provides the high
logic state (1) in case of opened contact, like already did for all the applications on any Carel
hardware.
At the qualification of the pressure transducer the software will automatically proceed at the
following operations:
• disqualification of the analogue inlet, related to the condensing coil temperature
• control of the defrost process according to the pressure values of condensation instead of the
temperature of the condensing coil.
The disconnection of the pressure trasductor will involve the automatic return at working in
temperature of all the interested functions and if qualified, at the exclusion of the proportional
control of condensation.
2.6 Digital inlets/outlets Configuration
To allow the interface dialogue of the system with different nature devices, among the
manufacturer parameters, protected by specific passwords, are provided with set up parameters of
the working modality of the inlets and the digital outlets.
They can be clearly set up, the working logic of each inlet or outlet, on the main card according to
the following correspondences:
Digital inlets
N.C. during the normal working of the unit the contact is closed (logic state 0), the contact
opening, involves an action from the program (logic state 1)
N.O. during the normal working of the unit the contact is opened (logic state 0), the contact
closing, involves an action from the program (logic state 1)
Digital outlets
N.C. the activation of a loading connected to the card pCO1OEM is caused from a closing of an
associated contact (references to the inlet/outlet tables)
N.O. the activation of a loading connected to the card pCO1OEM is caused from an opening of an
associated contact (references to the inlet/outlet tables)
2.7 B4 multifunction analogue inlet
The management of the B4 analogue inlet provides distinct modalities if is qualified or no, the heat
recovery function and the compensation of the adjusting setpoint based on the values of the
outside temperature.
The following table summarises the correspondences between the analogue inlet functionality and
particular unit enabled functions.
Rhoss S.p.A. S.A.T.
Rev. 1.0 20/01/05 8