OUMAN EH-105 - User Manual

EH-
n
et
EH-105
Air handling
unit controller
Ouman EH-105 is an intelligent air handling unit
controller that is suitable for all kinds of applications.
The controller s diverse and innovative control
solutions are as easy to use as the other Ouman
controllers that have a reputation for user friendliness.
The controller makes it possible to maintain optimal
air handling in spite of changing conditions in the
room to be ventilated (temperature, CO2 content,
channel pressure, increase in humidity).
In addition to normal week/24 hour clock functions,
EH-105 has a yearly clock that makes it easy to
create air handling unit controls for certain times
of the year (e.g., summer holidays, sundays during
the week, etc.)
Alarms can be received and acknowledged, time
programs and settings can be adjusted and
measurement data can be read quickly via text
messages. A GSM modem must be connected to
the controller to be able to use a GSM.
Control sequences:
• Dampers
• HRU
• Heating
• Cooling
• Fan control
Web-based remote control takes
place via EH-net server (optional
equipment).
GSM use requires that a GSM
modem (optional equipment) has
been connected to the controller.
www.ouman.fi
User manual
Remote control options:
• EH-net
Web based user interface
• GSM Control
Traditional text message use with all
GSM phones
• Other remote control opitions
Possibility to join SCADA solutions using
Modbus or LON protocol by means of
adapter card (optional).
Fan controls:
• Contactor controlled AH units
• AC converter controlled AH units

Summary

EH-105 Air Handling Unit Controller

Remote Control Options

Options for remote control via web interface or GSM text messages.

FOR STARTERS

Operation Panel

Details the buttons and display elements of the controller's interface.

Remote Control

Explains remote control via mobile phone text messages and web interface.

Controllers Basic Display

Measurements

Additional Information About Measurements

Provides further details on measurement values and their ranges.

AH Unit Control

AH Output Control Priorities

Settings

Additional Information About Settings

Provides extra details on specific settings like dampers and CO2 content control.

Supply Air Information

AH Output Information; Connection Information

Control Sequence Operating Modes

Clock Functions

Clock Functions

Covers programming week, special day, and calendar programs for AH unit control.

Alarms

B-ALARMS

Lists B-type alarms, their explanations, and associated relay outputs.

Language;Kieli

Type Information

Modem Initialization

GSM Functions; Text Messages

Entering the Maintenance Mode

General Settings

Covers user and maintenance level settings for general controller operations.

Additional Information About General Settings

Provides further details on alarm settings and parameter configurations.

Principle of Cascade Control

Cascade Control System

Explains the sequence of heating and damper functions in cascade control systems.

AH Controls

AH Controls

Explains air handling enhancement based on CO2, room temp, and humidity.

AH Controls Settings Tuning Values Actuator Selection

AH Controls

Details AH enhancement based on CO2, room temperature, and humidity.

AH Controls Tuning Values Actuator Selection

Dampers: Operating Mode

Dampers Settings Tuning Values Actuator Selection

Covers damper settings, tuning values, and actuator selection modes.

HRU Operating Mode

HRU Settings Tuning Values Actuator Selection

Covers HRU settings, tuning values, and actuator selection for defrost and efficiency.

Heating Operating Mode Settings Tuning Values Actuator Selection

Cooling: Operating Mode

Cooling Settings Tuning Values

Covers cooling settings, tuning values, and control types (stepped/continuous).

Cooling Tuning Values Actuator Selection

Details cooling tuning values and actuator selection for control modes.

24 VAC Controls

NTC-Measurements

Transmitter Measurements

ON;OFF Inputs

Additional Information About ON;OFF Inputs

Provides more details on ON/OFF inputs related to alarms, pump status, and temperature relays.

Restoring Settings

Locking Code

How to set a code to prevent unauthorized changes to settings.

Header Text

How to write custom text for the controller's basic display.

Bus Measurement; LON Initialization

Bus Connections; LON Initialization

Information on connecting to MODBUS, RS-485, or LON buses and initializing LON.

Text Message Connection via the Bus

Text Message Connection via a GSM Modem

Setting up GSM modem for text message communication and alarm reception.

Using the Browser

Installation and Maintenance Guide

General Connection Guide

Connection Guide Example 1 AC Freq. Converter Controlled AH Unit with Contradiction Alarms

Connection Guide Example 2 Contactor Controlled AH Unit with Contradiction Alarms

Connection Guide Example 3 Contactor Controlled AH Unit with Thermal Protection Alarms

Optional Equipment

Technical Information

OUMAN EH-105 Specifications

General

Model	EH-105
Protection	Short circuit, Overload
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +60°C
Humidity	20% to 90% RH (non-condensing)