Daikin R2CND024A4AA, R2TND012A4AA, R2TND018A4AA, R2TND024A4AA Operation manuals

Operation manual

Wall-mounted condensing boiler

R2CND024A4AA
R2TND012A4AA	Operation manual
R2TND018A4AA		English
R2TND024A4AA	Wall-mounted condensing boiler

Table of Contents

Table of Contents

1 Introduction		2
1.1	About the unit ............................................................................	2
1.2	About the documentation ..........................................................	2
	1.2.1 Meaning of warnings and symbols..............................	2

2 Safety instructions		2
2.1	Installation .................................................................................	2
2.2	Smell of gas...............................................................................	3
2.3	Modifications on the unit............................................................	3
2.4	Gas conversion .........................................................................	3
2.5	For the user ...............................................................................	3

3 Operation			3
3.1	User interface ............................................................................		3
	3.1.1	Buttons and dials ........................................................	4
	3.1.2	LCD screen .................................................................	4
	3.1.3	Status indicator ...........................................................	4
3.2	Operating the unit......................................................................		4
	3.2.1	To switch ON the unit..................................................	4
	3.2.2	About the low water temperature function ..................	4

3.2.3About the electronic gas adaptive system calibration . 4

3.3	Basic usage...............................................................................		4
	3.3.1	About the home screen...............................................	4
	3.3.2	To select the operation mode .....................................	5
	3.3.3	Possible operation modes...........................................	5
	3.3.4	Changing temperature setpoints.................................	5
	3.3.5	Possible central heating operation modes ..................	6
	3.3.6	About the central heating ECO mode .........................	6
	3.3.7	About the domestic hot water operation .....................	6
	3.3.8	About the domestic hot water comfort mode ..............	7
	3.3.9	About the boiler frost protection ..................................	7
3.4	Error handling............................................................................		7
3.5	Menu functions ..........................................................................		7
	3.5.1	To use menu level 1....................................................	7
	3.5.2	Info menu ....................................................................	7
	3.5.3	User settings menu .....................................................	8
	3.5.4	Installer settings menu ................................................	9

4	Maintenance and cleaning	9
	4.1 To clean the outer surface of the unit........................................	9
5	Energy saving tips	9
6	Contact	9
7	Error codes	9

Model	Type	Domestic hot water	Filling loop
		supply
R2TND018A4AA	R2TND018	Storage tank	External
R2TND024A4AA	R2TND024	Storage tank	External

A control unit, which contains a user interface, controls the ignition, safety systems, and other actuators. User interaction is provided via that user interface, which is composed of an LCD screen, push buttons, and two dials, and which is located on the front cover of the unit.

1.2About the documentation

The instructions contained in this document are intended to guide you through the operation of the unit. Damage caused by nonobservance of these instructions are not under the responsibility of ROTEX.

▪The original documentation is written in English. All other languages are translations.

▪The precautions described in this document are written for users and cover very important topics, follow them carefully.

▪Please read the instructions in the manual carefully, for your safety and health.

▪Please keep this manual for future reference throughout the unit's period of use.

▪Request the installer to inform you about the settings that he made to configure your system.

1.2.1Meaning of warnings and symbols

DANGER

Indicates a situation that results in death or serious injury.

WARNING

Indicates a situation that could result in death or serious injury.

CAUTION

Indicates a situation that could result in minor or moderate injury.

NOTICE

Indicates a situation that could result in equipment or property damage.

INFORMATION

Indicates useful tips or additional information.

1 Introduction

2 Safety instructions

1.1About the unit

This ROTEX unit is a wall-mounted gas-fired condensing boiler that can supply heat to central heating systems, as well as supply domestic hot water. Depending on settings, it is possible to use the unit solely for hot water or solely for central heating. Hot water supply type can be instantaneous or by means of a hot water storage tank. The type of the boiler can be recognised from the model name written on the identification label, which is located at the right cover of the unit. See table below:

		Model	Type	Domestic hot water	Filling loop
				supply
		R2CND024A4AA	R2CND024	Instantaneous	External
		R2TND012A4AA	R2TND012	Storage tank	External

Always observe the following safety instructions and regulations.

2.1Installation

WARNING

Installation, service, maintenance and repair of the boiler can only be carried out by suitably qualified competent persons, in accordance with the applicable legislation, regulations, rules and guidelines.

WARNING

The unit may only be operated with its casing properly mounted. Otherwise, in unfavourable conditions, material damage or even injury or death can result.

Operation manual				R2CND024A4AA + R2TND012~024A4AA
2				Wall-mounted condensing boiler
				3P469438-4D – 2017.07

3 Operation

CAUTION

A discharge pipe must be connected to the condensate trap in order to prevent contact with the condensate.

In case your skin comes into contact with condensate, the contact location should be washed with plenty of water. Condensate liquid must never be used for purposes of cleaning, watering plants, or drinking.

2.2Smell of gas

DANGER

This is a gas unit. Gas leaks might lead to poisoning and explosions.

If you smell gas:

▪Do not use any electrical switches, including light switches.

▪Do not use telephones in the affected area.

▪Do not use naked flames, such as matches or lighters.

▪Do not smoke.

▪Turn off the main gas supply.

▪Open windows and doors.

▪Warn other people in the building.

▪Get out of the building.

▪Inform your gas supplier, service agent or other competent person.

2.3Modifications on the unit

DANGER

Malfunctions can lead to poisoning and explosions. Never put the safety devices out of operation, nor tamper with them so as to impair their function.

CAUTION

An inappropriate modification may cause damage. Never tamper with the boiler or other parts of the system. Never attempt to perform maintenance or repair yourself. Call a qualified service agent.

CAUTION

Do not use sprays, solvents, chlorinated cleaning agents, paint, and adhesives in the vicinity of the unit. These substances can cause corrosion, even in the flue system.

DANGER

Do not damage or remove any seals on components. Only qualified persons are allowed to alter sealed components.

Do not make any modifications on:

▪Boiler

▪Gas, water or power supply

▪Flue system

2.4Gas conversion

WARNING

Never attempt to do gas conversion yourself. Only qualified persons can do gas conversion. Contact your service agent.

This unit is able to be operated with both natural gas and LPG. The preset gas type is indicated on the identification label of your unit. If you desire to use your unit with the other fuel type, contact your service agent.

2.5For the user

CAUTION

Any misuse is forbidden. The manufacturer is not responsible for any malfunctions and/or damage that may occur due to misuse.

▪Your unit is intended as a heater for central heating systems and for domestic hot water generation. Any other use is considered as "misuse".

▪If you are not sure how to operate the unit, contact your service agent.

▪This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

CAUTION

Do not rinse the unit. This may cause electric shocks or fire.

NOTICE

▪Do not place any objects or equipment on top of the unit.

▪Do not sit, climb or stand on the unit.

3 Operation

3.1User interface

a		b		c

d

e

f

g

aLeft dial

bLCD screen

cRight dial

dMode / Reset

eStatus indicator

fCancel / Back

gMenu / Enter

R2CND024A4AA + R2TND012~024A4AA				Operation manual
Wall-mounted condensing boiler	3
3P469438-4D – 2017.07

3 Operation

3.1.1Buttons and dials

The three buttons and two dials on the user interface have various functions according to different situations, which are stated in the table below:

Button/Dial	Function		Description
Mode /	Mode	Change mode between summer,
Reset		winter, central heating only, standby
		and full-off.
	Reset	Reset the lockout error.
Cancel /	Cancel	Cancel changes.
Back	Back	Go back to the parent menu.
Menu / Enter	Menu	Enter the menu function.
	Enter	Passing on to the next level in the
		menu structure.
	Confirm	Confirmation of changes.
Left dial	User	Central heating temperature setpoint.
	interaction	This is either the central heating flow
	level
		temperature, the room temperature,
		or the virtual room temperature,
		depending on the system
		configuration.
	Menu level	Selection of info, user, service menu.
Right dial	User	Domestic hot water temperature
	interaction	setpoint.
	level
	Menu level	▪	Selection parameter index.
		▪	Change parameter values.

3.1.2LCD screen

LCD screen is the monitor of the user interface. You can see the boiler operation mode, setpoints, information about actuators and menu parameters on this screen.

The LCD screen has a sleeping function. After one minute of noninteraction with the user interface, the screen darkens. Pressing any button or rotating any dial awakens the display.

When you interact with the user interface, the LCD screen will show the home screen of the active operation mode and the related setpoint, depending on the system configuration (see "3.3.3 Possible operation modes" on page 5).

Status icons

Meaning of icons that appear on the LCD screen:

Icon	Description

Operation mode: Standby mode

Domestic hot water operation enabled

Domestic hot water comfort mode is enabled

Central heating operation enabled

Room temperature

Outdoor sensor connection

Central heating ECO mode enabled

Network connection

Info menu

User settings menu

Service settings menu

3.1.3Status indicator

The status indicator gives first level feedback on the operation mode

and status of the boiler.

Status	Description
Standby	When there is no heat demand, the status
	indicator shows this with a kind of breathing
	pulsation of the blue and white LED.
Flame	At the moment flame ignites for central heating or
	domestic hot water, the ring flashes to its
	maximum, then constantly keeps glowing during
	burner operation.
Error	The status indicator will go into error mode when a
	warning, lockout or blocking error occurs (see
	"3.4 Error handling" on page 7). During the error
	condition the status indicator continuously shows
	the red blinking LED.

NOTICE

In warning error, the status indicator colour turns to blue while the boiler is operating.

3.2Operating the unit

3.2.1To switch ON the unit

1Connect the unit to the main power supply.

2Press the "Mode" button for 5 seconds to switch ON the unit.

3After that, you can select an operation mode by pressing the "Mode" button shortly.

Use of the unit is explained in following parts of this manual.

3.2.2About the low water temperature function

The low water temperature function is a safety function that takes place at first central heating operation after each power supply interruption and at first central heating operation after each 90 days. When this function is active, boiler operates according to a defined set value for around 15 minutes and the icon blinks. After this function is ended, normal operation goes on.

INFORMATION

Low water temperature function is a safety function and it cannot be disabled.

3.2.3About the electronic gas adaptive system calibration

The electronic gas adaptive system calibrates itself in predetermined time intervals. First calibration takes place just after first burner activation after each power ON. Calibration process duration is around 60 seconds and the icon blinks. After calibration is ended, boiler modulates to required capacity. Calibration process has no effect on boiler operation.

3.3Basic usage

3.3.1About the home screen

It is the screen that is displayed after activating the LCD screen with one of the dials or buttons. You can use the home screen to read out settings that are meant for daily use. What you can see on the home screen depends on your system configuration.

The following home screens may be possible:

▪Room temperature (ROTEX room thermostat connected)

▪Central heating set temperature

Operation manual				R2CND024A4AA + R2TND012~024A4AA
4				Wall-mounted condensing boiler
				3P469438-4D – 2017.07