Emerson EC2-552, Installing And Operating Instructions

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OI_EC2-XC645CX_A1_A2L_A3_EN_Rev01_866933.docx EC2-XC645CX 13/54
FIRST INSTALLATION
At first installation, it’s necessary the following:
1. Select the kind of gas. 2. Set the range of the pressure probes.
In the following paragraph a short cut for the above operations.
Chapters 11 Parameters programming and 17 will show in detail these operations.
7.1 How to set the kind of gas
The controller has memorized the relation between temperature and pressure for some gases.
The pre-set gas is: R448A. (FtyP = 448)
If another gas is used, act as in the following:
1. Enter the Programming mode by pressing the Set and DOWN key for 3 seconds.
2. Select the “ Pr2 ” parameter. Then enter the password 3 2 1 0 .
3. Select the FtyP, kind of gas, parameter.
4. Press the “ SET ” key: the value of the parameter will start blinking.
5. Use “ UP ” or “ DOWN ” to change the gas among the following:
r22 = R22 134 = R134 404 = R404A 407A = R407A 407C = R407C 407F= R407F
410 = R410 507 = R507 CO2 = CO
2
r32 = R32 290 = R290 448 = R448A
449 = R449A 450 = R450A 452 = R452 513 = R513 1234 = R1234ze
6. Press “ SET ” to store the new value and move to the following parameter.
EXIT: Press SET + UP or wait 30s without pressing a key.
NOTE : The set value is stored even when the procedure is excited by waiting the time-out to
expire.
7.2 How to set the range of the pressure probes
If an instrument with the following part number is used: EC2-XC645CX – xxxxF, it is pre-set to
work with pressure probe with the following range:
Probe 1: -0.5 -11.0 bar (relative pressure);
Probe 2: 0 - 30.0 bar (relative pressure)
If the probes you’re using have a different range act as in the following:
To set the pressure range of the Probe 1 (suction probe) use the parameter:
PA04: Adjustment of read out corresponding to 4 mA (0.5 V)
PA20 : Adjustment of read out corresponding to 20 mA (4.5 V)
To set the pressure range of the Probe 2 (condenser probe) use the parameter:
FA04: Adjustment of read out corresponding to 4 mA (0.5 V)
FA20 : Adjustment of read out corresponding to 20 mA (4.5 V)
Practically these parameters have to be set with the start and end scale of the probe range.
How to do:
1. Enter the Programming mode by pressing the Set and DOWN key for 3 seconds.
2. Select the “ Pr2 ” parameter. Then enter the password 3 2 1 0.
3. Select the PA04, adjustment of read out corresponding to 4 mA (0.5 V), parameter.
4. Press the “
SET
” key: the value of the parameter will start blinking.
5. Set the lower value of the probe range.
6. Push the SET key to confirm the value. The PA20: adjustment of read out corresponding
to 20 mA (4.5 V) parameter will be displayed.
7. Set the higher value of the range.
8. Push the SET key to confirm the value. Next parameter will be displayed.
Do the same things for the Probe 2, FA04, FA20 parameters .