PRODUCTS
EShop-number
Password
Welcome to SK Sales
 

ACOTO • Auto Change-Over panels

  • Auto Change-Over panel
  • 230 Volts or 400 Volts
  • Max. 9 Amps

Auto changeover panels

Application

The ACOTO range of changeover panels are designed to suit either single phase or three phase (Direct On Line starting) twin fan units fitted with or without airflow switches. The changeover panels incorporate industrial contactors fitted with thermal overloads pre-set to your requirements.
The control panel fascia has a power lamp, fan fail lamp and a rocker switch. The ACOTO range of auto changeover panels are compatible with our EFSC and ATC range of speed controllers. The ACOTO range are not suitable for use with inverters.

Composition

  • Fan A/B selector switch on manual duty share version
  • Internal timer on auto duty share version allows user to select duty period
  • Auto changeover on tripping of thermal overload or loss of airflow (if airflow switches fitted)
  • Optional fan fail output
  • Enable connections available as optional extra allowing duty fan to be enabled from a set of volt free contacts (230v ac rated)
  • Compatible with EFSC & ATC speed controllers

Auto Changeover
The control panel will automatically changeover from the duty fan to the standby fan if the thermal overload trips or on loss of airflow detected by airflow switches (if airflow switches are fitted to the twin fan unit)

Order example

ACO1TO - ADS - VFC - EN - 4.8A

Electrical Supply
ACO1TO: 230v 1Ph 50Hz fans
ACO3TO: 400v 3Ph 50Hz fans

Duty Share Method
MDS: Manual Duty Share
ADS: Automatic Duty Share

VFC: Volt Free Contacts
Fitted with normally open volt free contacts that close when either fan fails

EN: Enable Connections
Fitted with connections for external volt free contacts used to enable duty fan

x.xA: Motor Full Load Current
The full load current of each fan

Technical Data

ModelElectrical SupplyMax RatingDuty Share Method
ACO1TO-MDS230v 1ph 50hz9 AmpsManual Duty Share
ACO3TO-MDS400v 3ph 50Hz9 AmpsManual Duty Share
ACO1TO-ADS230v 1ph 50hz9 AmpsAutomatic Duty Share
ACO3TO-ADS400v 3ph 50Hz9 AmpsAutomatic Duty Share

Dimensions

ACOTO Auto Change-over Panels
ModelHeightWidthDepthMounting
ACO1TO-MDS315235130Surface
ACO3TO-MDS315235130Surface
Automatic duty share models
ACO1TO-ADS315235130Surface
ACO3TO-ADS315235130Surface

Wiring diagram 1

Notes

Auto Changeover
The control panel will automatically changeover from the duty fan to the standby fan if the thermal overload trips or on loss of airflow detected by airflow switches (if airflow switches are fitted to the twin fan unit)

Manual duty share models
Manual duty share models are fitted with a 2-position (Fan A/Fan B) rocker switch enabling the user to manually select the duty fan. The control panel will auto changeover from the duty fan to the standby fan as described in Auto Changeover above.

Auto duty Share models
Auto duty share models are fitted with an electronic timer to provide a 12 hour cycle time for each fan. The timer has a jumper link to allow testing of the auto change over on a 1 minute test cycle for each fan. After testing the jumper link should be fitted back in the 12hr cycle time position The position of the jumper link for the test cycle and 12 hour cycle are shown below.

Volt free contacts (VFC Models)
These models are suffixed with VFC and feature 1 set of volt free contacts for a common fan fail status. The contacts are normally open and close when either fan fails.

Volt free contact enable connections (if fitted)
The control panel has the facility for the user to enable the duty fan using an external set of volt free contacts e.g. Building Management system. The duty fan will run when the contacts close.

Operation
Mobile WebsiteAbout UsDisclaimerPrivacy policyCookie policy

Requesting information. Please wait a moment...