Daikin FWECSA - User Manual

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Summary

Safety Symbols and General Warnings

Safety Symbols

Identifies and explains the safety symbols used in the manual for safe operation and handling.

General Warnings

Provides crucial warnings and precautions for the safe and proper use of the FWECSA controller.

Networks and Connectivity

Supervision System Connection

Connects FWECSA controllers to an external supervision system via MODBUS RTU protocol.

Small Network Solutions

Sets up MASTER/SLAVE networks of FWECSA controllers using RS485 or Conveyed Waves.

Mixed Network Configuration

Combines SMALL network on Conveyed Waves with a supervision network via RS485.

Product Overview and Functions

General Features

Describes the FWECSA controller's design and capabilities for multi-speed, single-phase motors.

Main Functions

Lists the primary operational capabilities of the FWECSA controller, including fan speed and valve management.

User Unit Interface

User Unit Description

Details the main screen layout, status symbols, and information displayed on the FWECSA controller.

Keyboard Operations

Explains the functions of the 6 keys on the FWECSA controller's display screen.

Basic Unit Operations

Key Combinations

Lists useful key combinations for accessing specific functions and features on the FWECSA unit.

Unit On;Off and Temperature Set

Procedure for switching the unit on/off and adjusting the room air temperature setpoint.

Ventilation Speed Adjustment

Steps to change the fan speed settings on the FWECSA controller.

Advanced User Unit Functions

Operating Mode Control

How to switch between Cooling and Heating modes using the MODE key.

Economy Function Management

Steps to turn the Economy function on or off via the main screen.

Electric Heater Operation

How to enable or disable the electric heater operation on the FWECSA controller.

Viewing and Configuring Settings

Keyboard Locking and Unlocking

Procedure to lock or unlock the FWECSA controller's keyboard for normal operation.

Date, Time, and Time Slots Configuration

Guide to viewing, changing, and setting up time slots for daily and weekly operation.

Parameters and Configuration Menu

Parameters Menu and Lists

Overview of accessing and navigating the parameter menus for configuration.

Configuration Limits and Settings

Configuration Limits

Requirements for unit configuration, considering heaters, valves, and pipe systems.

Configurable Digital Output

Details on setting up the digital output based on operating statuses.

Stand-by Mode Options

Explains the different stand-by modes and their display behavior.

Adjustment Menu and Setup

Adjustment Menu

Provides access to various adjustment parameters for the FWECSA controller.

Setup Menu Parameters

Lists parameters accessible via the Setup Menu and their default values.

Logic and Ventilation Control

Cooling;Heating Switching Logic

Explains the logic for switching between cooling and heating modes.

Ventilation Modes and Speeds

Overview of step and modulating ventilation, including natural convection and speed selection.

Automatic Ventilation Operation

3-Speed Unit Automatic Operation

Automatic fan speed operation for 3-speed units with ON/OFF or modulating valves.

4-Speed Unit Automatic Operation

Automatic fan speed operation for 4-speed units with ON/OFF or modulating valves.

Modulating Ventilation and Heating

Modulating Ventilation Logic

Explains automatic and fixed-speed operation for modulating ventilation.

Heating Ventilation Configurations

Ventilation logic for heating with 3-speed and 4-speed configurations.

Forced Operations and Valve Control

Forced Operations

Describes situations where normal ventilation logic is ignored for temperature control.

Valve Control Types

Explains the management of 2- or 3-way ON/OFF or modulating valves.

Water Consent and Economy

Water Consent Logic

Conditions for water temperature consent for heater operation.

Economy Function Details

Details on how the Economy function adjusts setpoints and forces operation.

Minimum Temperature Control

How minimum temperature control prevents room temperature from dropping.

Dehumidification and Alarms

Dehumidification Logic

Explains the logic for reducing room humidity in cooling mode.

Water Consent for Dehumidification

Conditions for water temperature consent for dehumidification.

System Alarms

Lists possible alarms related to missing probes required by the unit configuration.

Network Setup and Data

Supervision System Connectivity

Connects FWECSA controllers to an external supervision system via MODBUS RTU protocol.

Small Network Configuration

Sets up MASTER/SLAVE networks of FWECSA controllers using RS485 or Conveyed Waves.

Mixed Network Configuration

Combines SMALL network on Conveyed Waves with a supervision network via RS485.

Input;Output Status and Registers

Input Status Overview

Lists digital inputs and their read-only status.

Holding Registers (Read;Write)

Details holding registers for reading and writing parameters.

Input Registers (Read-Only)

Lists input registers for read-only values like temperature and humidity.

Small Network Specifics

RS485 Small Network Setup

Configuration for MASTER/SLAVE network using RS485 bus.

Conveyed Waves Small Network Setup

Configuration for connecting up to 32 units via OC bus.

Network Topologies and Indicators

Mixed Network Topology

Combining SMALL network with a supervision network for a MIXED NETWORK.

I;O Board LED Indicators

Explains the status indicated by the BLUE, GREEN, and RED LEDs on the I/O board.

Technical Data and Installation Overview

Technical Specifications

Provides specifications for power supply, temperature, IP rating, inputs, and probes.

Installation and Maintenance Overview

General guidance on installing user interfaces, boards, and probes.

Probe Installation Guidelines

Details on installing air and water temperature, and humidity probes.

Probe Installation Details

Humidity Probe Installation

Instructions for connecting and positioning the optional humidity probe.

Water Probe Installation

Guidance on connecting water temperature probes for 2-pipe and 4-pipe systems.

Fan Coil Probe Placement

Specific placement instructions for water probes on different fan coil types.

User Unit Installation Procedure

User Unit Mounting Guidelines

Guidelines for choosing an installation area and mounting the user unit panel.

I;O Board and Electrical Installation

On-Board I;O Board Installation

Procedures for installing the I/O board on various FWECSA unit models.

Electrical Connections

Instructions for qualified staff to perform electrical connections safely.

Maintenance Guidelines

Recommendations for maintenance operations to be performed by authorized centers or qualified staff.

The Daikin FWECSA is an electronic control unit designed for hydronic terminals, managing various aspects of their operation. It is compatible with Daikin system units featuring multi-speed, single-phase motors or those coupled to an inverter for speed modulation.

Function Description

The FWECSA controller provides comprehensive management for hydronic units, including:

Fan Speed Control: Offers automatic or manual fan speed variation, with options for 3-speed or 4-speed hydronic units, and modulating ventilation (0-100% variable speed).
Valve Management: Controls ON/OFF or modulating valves for both two-pipe and four-pipe systems.
Electric Heater Control: Supports the operation of an electric heater during heating mode.
Operating Mode Switching: Allows switching between Summer (cooling) and Winter (heating) modes through four methods: manually from the keyboard, remotely via digital input, automatically based on water temperature, or automatically based on air temperature.
Dehumidification Function: Manages the dehumidification process in Cooling mode, aiming to reduce room humidity to a setpoint level when a humidity probe is installed and configured.
Time Slots Operation: Enables scheduled operation of the unit based on hourly, daily, and weekly time slots, allowing users to define when the fan coil is OFF or operates with specific setpoints (T1, T2, T3).
Network Connectivity: Supports serial communication on two types of networks:
- External Supervisor System Solution: Connects to an external supervision system using MODBUS RTU protocol over serial RS485, with the FWECSA acting as a SLAVE.
- "Small" Network Solution: Allows connection of multiple FWECSA controllers in MASTER/SLAVE configurations via serial RS485 or Conveyed Waves (CW).
- Mixed Network Solution: Combines both RS485 and CW connections for multi-level control.
Digital Inputs: Features external pre-consensus digital input (e.g., window contact, remote ON/OFF, presence sensor) to enable/disable unit operation, digital switching input for remote centralized Cooling/Heating, and digital input to enable ECONOMY function from remote control.
Digital Output: Includes a completely configurable dry contact digital output.
Probes: Utilizes a standard room air temperature probe (integrated into the user unit), with optional remote air, water (one or two for 4-pipe systems), and relative room air humidity probes.

Important Technical Specifications

Power Supply: 230Vac 50/60Hz, Power 2.5 W.
Operating Temperature: Range 0-50°C.
Storage Temperature: Range -10-60°C.
IP Protection Rating: IP30 (user unit).
Output Relay: Normal Open 5A @ 240V (Resistive), Max room temperature: 105°C, Micro-interruption.
Inputs: NTC Temperature Probes, 0-5V probes, Dry contacts (digital inputs).
Temperature Probes: NTC probes 10K Ohm @25°C, Range -25-100°C.
Humidity Probe: Resistive type of probe, Range 20-90%RH.
Max Cable Section for Clamps: 1.5 mm².
Pollution Rating: Degree II.
Heat/Fire Resistance: Category D.
Over-voltage Category: Category II.
EMC Conformity Standards: EN 61000-6-1(2007), EN 61000-6-3(2007) + A1(2011).
Serial Communication: Settable baud rate (default: 9600), no parity, 8 bits of data, 1 bit of stops for MODBUS RTU.

Usage Features

The user unit features a graphic display and a six-key keyboard for interaction.

Main Screen: Displays room temperature, ambient humidity (if configured), status symbols (time slots on, economy function on, dehumidification running, minimum room temperature function enabled, valve/s open, electric heater enabled/on, network status, locked keyboard), operating mode (COOLING/HEATING), ventilation status, and room air temperature SET value. Alarm signals overwrite status symbols.
Key Functions:
- ON/OFF Key: Switches the unit on/off, returns to the main screen.
- PRG Key: Accesses the MENU.
- MODE Key: Changes operating mode (HEATING/COOLING).
- UP/DOWN Arrow Keys: Changes ventilation values/speed, scrolls through screens.
- SET Key: Changes SET/VENTILATION mode, confirms values, returns to screen scroll mode.
Key Combinations: Specific combinations enable/disable time slots, display water temperature, display clock data, and lock/unlock the keyboard.
Temperature Set Adjustment: Allows users to change the desired room air temperature setpoint.
Ventilation Speed Adjustment: Users can select automatic, extra-low, low, medium, or high speeds for step ventilation, or adjust a percentage for modulating ventilation.
Economy Function: Can be turned on/off to optimize energy consumption.
Electric Heater Operation: Can be enabled/disabled.
Minimum Room Temperature Control: Can be enabled/disabled.
Room Humidity Control: Can be enabled/disabled, with an adjustable humidity setpoint.
Time Slots: Configurable for hourly, daily, and weekly scheduling of unit operation (OFF, T1, T2, T3 setpoints).
Keyboard Lock: Prevents unauthorized changes to settings.
Water Temperature Display: Shows the water temperature if a probe is installed.
Date and Time Display/Setting: Allows viewing and adjusting the internal clock.
Stand-by Mode: Configurable to display OFF, clock, or temperature after a period of inactivity.
Alarms: The unit manages alarms for missing probes (air, water, humidity).

Maintenance Features

Installation and Maintenance: Operations must be performed by qualified staff.
Power Disconnection: Always disconnect voltage before performing any procedure on the unit.
Probe Installation: Specific instructions are provided for installing remote air, humidity, and water probes. Probe cables must be kept separate from power cables to avoid interference.
I/O Board Installation: Details for installing the I/O board on different unit types (FWD-FWB-FWP-FWZ-FWV-FWR-FWL-FWS-FWM units and FWB-FWP units).
Electrical Connections: Diagrams and instructions for connecting the unit, emphasizing the importance of correct wiring according to the unit's rating plate and specific diagrams.
Software Information: The INFO MENU provides details on the installed software.
Output Display/Test: Allows viewing the status of physical outputs and forcing them for testing purposes.