Seltron ACD20 Manuale utente

ACD20

Constant temperature controller

ENEN

| 3

CONSTANT TEMPERATURE

CONTROLLER ACD20

INTRODUCTION

ACD20 controllers are modern microprocessor-controlled devices with an integrated

actuator for the mixing valve and circulation pump control. They are produced in

digital and SMT technology. They are designed to control constant temperature in

various heating and cooling applications. They are most commonly used for the

control of the return temperature to the boiler or the supply temperature to the system.

4 |

| 5

CONTENTS

Introduction .....................................................................................................................................................3

Appearance of the controller....................................................................................................................6

Initial controller setup..................................................................................................................................7

Basic screens .................................................................................................................................................. 11

Help ...................................................................................................................................................................14

Entering and navigating through the menu .....................................................................................14

Menu structure and description............................................................................................................ 15

Requested temperatures......................................................................................................................... 16

Operation mode ........................................................................................................................................... 18

Information....................................................................................................................................................20

Display............................................................................................................................................................. 23

Statistics........................................................................................................................................................ 26

User P parameters..................................................................................................................................... 28

Service S parameters ................................................................................................................................. 31

Factory settings ..........................................................................................................................................38

Clutch and manual valve displacement ............................................................................................39

Controller installation............................................................................................................................... 40

Controller power connection................................................................................................................. 42

Operation modes with sensor failure..................................................................................................43

AUX function at COM input....................................................................................................................44

Technical data..............................................................................................................................................45

Hydraulic schemes .....................................................................................................................................46

6 | Instructions for use

EN APPEARANCE OF THE

CONTROLLER

1. Button . Return back.

2. Button . Move to the left, decreasing.

3. Button . Move to the right, increasing.

4. Button . Menu entry, conﬁrmation of selection.

5. USB port for software updates and connection to a personal computer.

6. Graphic display.

7. Button . Help.

8. Manual operation clutch.

9. Manual movement button.

10. Pre-wired power cord with plug.

11. Pre-wired cable for circulation pump.

12. Pre-wired connection box for sensors and communication.

911128

1 2 103 4 5

| 7Instructions for use

Use the buttons and to select the requested

language. Conﬁrm the selected language by pressing .

If you've mistakenly selected the wrong language, you

can return to the language selection with the button.

STEP 1 - LANGUAGE SELECTION

INITIAL CONTROLLER SETUP

The controller is equipped with an innovative "Easy start" function, which allows the

initial setting of the controller in just a few steps.

Upon the ﬁrst connection of the controller to the power supply network, the ﬁrst step

of the controller setup is displayed after the program version and logo

The manual movement button must be removed for the setup. The Easy start function

is activated by pressing the buttons and and holding them both down together

for 5 seconds.

Later, you can change the language in the

“Display” menu.

8 | Instructions for use

STEP 4: SELECTING THE OPENING DIRECTION OF THE MIXING

VALVE.

You can select the opening direction of the mixing

valve. Use the buttons and to navigate between

directions. Conﬁrm the selected direction with the

button.

If you have mistakenly selected the wrong direction, you

can return to the direction selection with the button.

STEP 2 - SELECTING HEATING OR COOLING OPERATION

Use the buttons and to select the requested

operating mode - heating or cooling.

Conﬁrm the selected operating mode by pressing .

If you've mistakenly selected the wrong operating mode,

you can return to the operating selection with the button

STEP 3: HYDRAULIC SCHEME SETUP.

You can select the hydraulic scheme for the controller

operation. Use the buttons and to navigate

between schemes.

Conﬁrm the selected scheme with the button.

If you have mistakenly selected the wrong scheme, you

can return to the diagram selection with the button .

INITIAL CONTROLLER SETUP

Later, you can change the operating mode in the

"Operating mode" menu.

Later, you can change the hydraulic scheme with

the S1.1 service parameter.

Later, you can change the opening direction of the

mixing valve with the service parameter S1.3.

| 9Instructions for use

STEP 6: SETTING THE UPPER LIMIT FOR THE REQUESTED

HEATING TEMPERATURE

With the buttons and you can set up the upper

limit of the requested temperature in heating mode.

Conﬁrm the setup by pressing .

If you have accidentally set the wrong upper limit, you can

return to the upper limit setting by pressing .

STEP 7: SETTING THE REQUESTED HEATING TEMPERATURE

With the buttons and you can set up the requested

temp. in heating mode. Conﬁrm the setup by pressing .

If you have accidentally set the wrong requested

temperature, you can return to the requested temperature

setting by pressing .

For schemes with stand-pipe control, the supply temperature symbol

is displayed.

STEP 5: SETTING THE LOWER LIMIT FOR THE REQUESTED

HEATING TEMPERATURE

With the buttons and you can set up the lower

limit of the requested temperature in heating mode.

Conﬁrm the setup by pressing .

If you have accidentally set the wrong lower limit, you

can return to the lower limit setting by pressing .

INITIAL CONTROLLER SETUP

Later, you can change the lower limit setting of the

requested heating temperature with the service

parameter S2.1.

Later, you can change the upper limit setting of the

requested heating temperature with the service

parameter S2.2.

Later, you can change the requested heating

temperature in the "Requested temperatures"

menu.

10 | Instructions for use

STEP 8: SETTING THE LOWER LIMIT FOR THE REQUESTED

COOLING TEMPERATURE

With the buttons and you can set up the lower

limit of the requested temperature in cooling mode.

Conﬁrm the setup by pressing .

If you have accidentally set the wrong lower limit,

you can return to the lower limit setting by pressing .

STEP 9: SETTING THE UPPER LIMIT FOR THE REQUESTED

COOLING TEMPERATURE

With the buttons and you can set up the upper

limit of the requested temperature in cooling mode.

Conﬁrm the setup by pressing .

If you have accidentally set the wrong upper limit, you

can return to the upper limit setting by pressing .

STEP 10: SETTING THE REQUESTED COOLING TEMPERATURE

With the buttons and you can set up the

requested temperature in heating mode.

Conﬁrm the setup by pressing .

If you have accidentally set the wrong requested

temperature, you can return to the requested

temperature setting by pressing .

For schemes with stand-pipe control, the supply temperature symbol

is displayed.

INITIAL CONTROLLER SETUP

Later, you can change the lower limit setting of the

requested cooling temperature with the service

parameter S2.3.

Later, you can change the upper limit setting of

the requested cooling temperature with the service

parameter S2.4.

Later, you can change the requested cooling

temperature can be later changed in the

"Requested temperatures" menu.

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