Daikin EKWHCTRL1, EKRTCTRL1 Installation manuals

INSTALLATION, CONNECTION AND SETTINGS WALL MOUNTED CONTROL EKWHCTRL1, EKRTCTRL1 FOR USE IN A MODBUS RTU SERIAL NETWORK

Warnings

This instruction manual forms an integral part of the device and therefore must be carefully preserved and must ALWAYS travel with it, even if you transfer the device to another owner or relocate it to other premises.

If the manual gets damaged or lost, download a copy from the website.

For a rapid and right assembly of the components follow carefully the sequences described in the various sections.

All the operations must be performed by qualified personnel using the required Personal Protective Equipment.

This document is restricted in use to the terms of the law and may not be copied or transferred to third parties without the express authorization of the manufacturer.

Description

The terminal board +ABof the INN-FR-B32 Printed circuit board allows the connection of the same present in the control panels EKRTCTRL1, EKWHCTRL1 and EKWHCTRL0 to a serial communication network "Modicon ModBus" RTU.

The EKWHCTRL0 kit can only be installed in combination with the electronic controls EKWHCTRL1. In this case the connection from the electronic board INN-FR_B32 is not necessary because the electronic controls EKWHCTRL1 have a specific serial port to connect.

Electric connections

A INN-FR-B32 board

Preliminary warnings

Before each intervention:

•disconnect the device from the power mains by turning the system master switch to "OFF"

•wait for the components to cool down in order to avoid any burns

Make sure that there is no voltage before operating.

technical intervention before disconnecting the unit from the power supply is forbidden.

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Access to the printed circuit board

To access the electrical connection area:

–follow the instructions in the installation manual of the appliance

To access the Printed circuit board:

–access the electrical connection area

–unscrew the fixing screws of the electric box

–remove the cover

A	Cover of the electrical box
B	Fixing screws
C	PCB
	A
	C
	B
	B

Electrical connections EKRTCTRL1

	For connection of the electronic board to a "Modicon Mod-	connect respecting the indication "A" and "B"
	Bus" RTU serial communication network:	For all other connections, refer to the diagrams and in-
	– follow the indication on the connection diagram
		structions in the installation manual.
	– collegarsi al connettore ModBus con serigrafia presente
	sulla scheda

+BA- ModBus RTU serial connection

H2 Hot water temperature probe 10 kΩ AIR Optional air probe

M1 Fan motor DC Inverter

S1 Grid safety microswitch CP Presence input sensor

Y1 (N-EV1) Water solenoid valve (230 V/50 Hz 1 A power output) L-N 230 V/50 Hz electrical power supply connection

BO Boiler consent output (free contact max 1 A) CH Chiller consent output (free contact max 1 A)

H4 H2 AIR

N540022B

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Electrical connections EKWHCTRL1 with on-board Printed circuit board EKWHCTRL0

AModBus RTU Serial Connection

BSerial connection for fancoil

+ A B - A A B B -

B A

For connection of the electronic board to a "Modicon ModBus" RTU serial communication network:

– connect to the terminal block on the wall control unit

For all other connections, refer to the diagrams and instructions in the installation manual.

The choice of materials and the routing of the connection are fundamental for correct operation.

Use a bipolar shielded cable suitable for the RS485 serial connection with a minimum section of 0,35 mm².

Keeping the bipolar cable separate from power supply cables.

Chase out the wall in order to minimize the length of the leads.

Complete the line with the 120 Ω resistance. It is forbidden make "star" connections.

1.Terminal block for device connection

2.The terminal block for CP presence contact connection

3.PCB

			N540022B	N540022B
+ A B -	A A B B	-	CP
1			2
			L
			N
			3	3

Serial Port Features

Protocol

The serial communication protocol is “Modicon Modbus” in RTU mode with the following settings:

•baudrate=9600

•data bits=8

•parità=nessuna

•stop bit=1

The implemented functions are:

•“03” and “06” respectively for the reading and writing of a single register

•the main adjustment parameters (R/W), the acquired temperature and the operating status are made available

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