Carel pCO1 series Manual

Standard Shelter
Cod. +030221471 – Rel. 2.0 – April 01, 2003
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17
ELECTRONIC EXPANSION VALVE
The EVDriver module for the management of electronic expansion valves (EEV) in the pLAN network allows superheating control on the suction
side for more efficient and versatile operation of the refrigerating unit.
The use of the electronic expansion valve involves the installation of both the EVDriver same and the expansion valve itself, as well as of a
temperature sensor and pressure transducer, both located at the evaporator outlet (on the compressor suction line). The following diagram shows the
typical installation layout.
The heart of the superheating control function is a PID algorithm with programmable coefficients.
The possible settings are: LOW (Low superheating with programmable integration time and threshold)
LOP (Low evaporation pressure, active only on changes in capacity, with programmable
integration time and threshold)
MOP (High evaporation pressure, programmable integration time and threshold)
HiTcond (High condensing pressure, using the condensing pressure probe connected to the pCOx,
with programmable integration time and threshold)
The table of parameters lists the control parameters, with the corresponding threshold and default value. The table below explains the meaning of the
VALVE TYPE parameter (see screens F1 – F2):
PARAMETER VALUE CORRESPONDING VALVE TYPE
0 Alco EX5 – EX6
1 Alco EX7
2 Alco EX8
3 Sporlan SIX 0.5 - 11
4 Sporlan SIX 25
5 Sporlan SIX 50 - 250
6 Danfoss ETS 50
7 Danfoss ETS 100
8 ---
9 Carel E2V**P
10 ---
11 Custom (other type of valve)
Condensor
EEV
Evaporator
Compressor
T probe
P probe
Motor
connection
pLAN
EEV
Evaporator
T probe
P probe
Motor
connection
pLAN

Carel pCO1 series Specifications

General

Brand	Carel
Model	pCO1 series
Category	Controller
Language	English