Emerson XEV22D Wartungshandbuch PDF herunterladen (Seite 3)

1592025990 XEV22D GB r1.5 14.11.2014.docx XEV22D 3/6

4.11 RS485 SERIAL LINE

All models can be connected to the monitoring and supervising system XWEB3000. If Mod=Std

standard ModBUS-RTU protocol is used, if Mod=AdU custom XWEB library is required. This last

configuration makes possible to use the same serial address of the thermostat that gives the cooling

request to XEV. In this way, it’s possible to reduce the number of addresses used.

4.12 CONNECTION OF XEC SUPERCAP (BACK UP BATTERY)

XEC Supercap is designed to be used with Dixell products (XM678D, XEV, IEV and others); to close

the stepper valve in case of power failure.

!!!!! IMPORTANT !!!!!

XEC Supercap and XEV22D must be powered by two different transformers; the failure of the

observance of this rule may result in damage to the XEC Supercap and / or the connected XEV22D.

Wiring connection

XEV22D

XEC

Terminal 31 (+) Terminal 4 (12Vdc)

Terminal 30 (gnd) Terminal 3 (gnd)

5. FRONT PANEL

To display and to modify the set point. In programming mode it selects a parameter or it

confirms a value.

Push to display pressione per visualizzare il valore apertura valvola 0..100% per

qualche secondo.

PRB Una pressione per visualizzare il valore di pressione per qualche secondo.

By pressing and releasing this key, it’s possible to see the values of the probes.

In programming mode it slides the codes of the parameters or it increases their values.

In programming mode it slides the codes of parameters or it decreases their values.

KEYS COMBINATIONS

To lock or to unlock the keyboard

To enter programming mode.

5.1 XEV22D LEDS

On display there are some luminous dots. Their meaning is described in the following table:

LED MODE Function

ON Low pressure alarm

ON Maximum Operating Pressure alarm

OFF Valve is completely closed

BLINKING Valve is moving

ON Valve is completely opened

BLINKING Serial communication present

OFF Serial communication absent

ON Superheat alarm

6. USER INTERFACE

6.1 FAST ACCESS MENU (DURING REGULATION)

2) Press and release UP button.

3) The variable available in the Fast access menu are:

a. CLP Cooling demand percentage

b. tP1 Temperature from Probe 1

c. PPr Pressure value from Probe 2 transducer.

d. tP2 Suction temperature obtained from pressure temperature table .

e. SH Value of superheat.;

f. StH Superheat set point

g. oPP Percentage of valve opening.

h. d1S Free voltage digital input status

i. d2S Main Voltage digital input status VAC

4) Brows parameter labels with UP or DOWN buttons.

5) Press SET to see read-only value. To change parameter, press SET.

6) To leave the fast access menu, press and release SET+UP or wait for time-out to expire (about

3 minutes).

NOTE: IF THE REGULATION IS NOT ENABLED THE CONTROLLER DISPLAYS “PMP”.

6.2 HOW TO: SEE THE SET POINT

1) Press the SET buttons until the set point will be showed.

2) To come back to see temperature, wait about 5s or press newly SET key.

6.3 HOW TO: MODIFY THE SET POINT

To change the set point value operate as follows:

1) Press the SET button until the set point will be showed.

2) Use UP or DOWN buttons to change its value.

3) Press SET button to store the new value.

6.4 HOW TO: ENTERING “PR1” PARAMETER MENU

To enter in “Pr1” level menu:

1) Pressing SET+ DOWN buttons for about 3

seconds.

2) Instruments shows first parameter in Pr1

6.5 HOW TO: ENTERING “PR2” PARAMETER MENU

To enter to “Pr2” parameters list:

1. Enter to “Pr1”.

2. Select “Pr2” parameter and press SET.

3. The “PAS” label will be shown, then “0--” with 0 blinking.

4. Insert “321” password through UP and DOWN buttons, then press SET to confirm.

6.6 HOW TO: CHANGE A PARAMETERS VALUE

To change the parameter’s value operate as

follows:

1. Enter the Programming mode by

pressing the SET and DOWN button for

about 3s.

2. Select the required parameter.

3. Press the SET button to display the value.

4. Use UP or DOWN to change the value.

5. Press SET to store the new value and move to the following parameter.

To exit: Press SET + UP or wait 30s without pressing any button.

NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.

7. PARAMETER LIST

NOTE: All pressure parameters are relatives or absolutes depending on the PrM parameter.

REGULATION

FtY Kind of gas: type of gas used by plant. This is a fundamental parameter for correct

functioning of all system.

The table below contains the refrigerant gases managed by the XEV22D and their

operating temperature

LABEL REFRIGERANT OPERATING RANGE

R22 r22 -50-60°C/-58÷120°F

134 r134A -70-60°C/-94÷120°F

404 r404A -50-60°C/-58÷120°F

47A r407A -50-60°C/-58÷120°F

410 r410 -50-60°C/-58÷120°F

507 r507 -70-60°C/-94÷120°F

47C r407C -50-60°C/-58÷120°F

47F r407F -50-60°C/-58÷120°F

290 r290 – Propane -50-60°C/-58÷120°F

CO2 r744 - Co2 -50-60°C/-58÷120°F

450 r450A -45-60°C/-69÷120°F

513 r513 -45-60°C/-69÷120°F

448 r448A -45-60°C/-69÷120°F

449 r449A -45-60°C/-69÷120°F

rEt Reaction time (1÷100s; 0 = automatic time adjustment) time delay between valve

position adjustments.

It’s the time between the valve adjustment command and when the valve is moved.

With rEt = 1 the valve is moved continuously,

with rEt = 10 the valve is moved every 10s,

with rEt = 0 the reaction time is calculated automatically by the system, according the

SH variation. The range is between 6÷60s,

PEo Probe Error opening percentage: (0 to 100%) if a temporary probe error occurs, valve

opening percentage is PEo until PEd time is elapsed.

If PEO is different from 0 it assures cooling also with probe error, because even if the

device cannot calculate superheat the valve can work at PEo percentage.

PEd Probe Error delay before stopping regulation: (0 to 239sec; 240=On=unlimited) if

probe error duration is higher than PEd, valve will close completely and “Pf” message

will be showed. With PEd=on, valve opening is PEo until probe error finishes.

tEU Type of Stepper motor: (UP; bP) it permits to select the kind of valve.

UP = Unipolar valves;

bP = Bipolar valves.

!!!!! WARNING !!!!!

This parameter has to be adjusted before connecting the valve.

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