Glowworm Icon 23t Manual

This is a CAT II2H3+

appliance

USER, INSTALLATION

AND SERVICING

INSTRUCTIONS

Wall hung

combination boilers

SUPPORTED BY

2icon

Index

Note

The boiler serial number is marked on the data label attached to the inside of the outer

casing. Refer to the ‘Introduction’ section for a description of the basic functions of the boiler.

The ‘User’ section describes how to safely operate the boiler.

Mandatory warning for CEE countries

WARNING, these appliances were designed, approved and inspected to meet the

requirements of the English market. The identification plate located on the inside of the

appliance certifies the origin where the product was manufactured and the country for

which it is intended.

If you see any exception to this rule, please contact your nearest Stockist.

Thank you in advance for your assistance.

Index

Introduction .......................................... 3

User

instructions ..................................3

Introduction .......................................... 4

Controls and lighting............................. 4

Technical data ..............................7

Installation

instructions ................................11

Clearances ......................................... 11

Terminal position ................................ 12

Heating system design....................... 13

Domestic hot water system design..... 13

Boiler connections .............................. 14

Gas connection .................................. 14

Boiler installation ................................ 15

Horizontal flue installation .................. 16

Vertical flue installation....................... 17

Flue configuration ............................... 18

Electrical connection .......................... 19

Commissioning................................... 20

Safety devices .................................... 22

Gas valve setting................................ 23

Adjustments ....................................... 23

Boiler schematic ................................. 25

Servicing

instructions ................................26

Routine cleaning and inspection......... 27

Replacement of parts ......................... 28

Schematic wiring diagram .................. 31

icon

User instructions

Introduction

The icon 23 t and icon 28 t boilers are wall mounted combination boilers providing central

heating and instantaneous domestic hot water.

The boilers are of the II2H3+ category for use with Natural gas (G20) as distributed in the United

Kingdom.

These instructions should be carefully followed for the safe and economical use of your boiler.

The boiler has a fan assisted balanced flue which both discharges the product of combustion to,

and draws the combustion air from the outside of the building.

ACCESSORIES

A range of accessories are available including vertical flue components. For further information,

contact you nearest Stockist.

GAS SAFETY (INSTALLATION AND USE) REGULATIONS

In your interests and that of gas safety, it is the law that ALL gas appliances are installed and

serviced by a competent person in accordance with the above regulations.

GAS LEAK OR FAULT

If a gas leak or fault exists or is suspected, turn the boiler off and consult the local gas company or

your Installer/Service Provider.

BOILER CONTROLS

The control panel, located at the lower front of the boiler, allows the boiler to be started, shut down,

controlled and monitored during use, refer to ‘User Instructions’.

User

instructions

4icon

User instructions

Introduction

The icon 23 t and icon 28 t boilers are wall mounted combination boilers providing central

heating and instantaneous domestic hot water.

These instructions should be carefully followed for the safe and economical use of your boiler.

GAS LEAK OR FAULT

If a gas leak or fault exists or is suspected, turn the boiler off and consult the local gas company or

your Installer/Service provider.

IN CASE OF POWER SUPPLY FAILURE

The boiler no longer operates.

As soon as power supply is restored, the boiler will restart automatically.

IN CASE OF LOSS OF WATER IN THE SYSTEM

CAUTION: The boiler is installed as part of a sealed system which must only be drained and

filled by a competent person.

If the pressure shown on the pressure gauge is less than 1 bar the system must be filled up

immediately.

Important notice: Acentral heating system cannot operate satisfactorily unless it is properly filled

with water and unless the air initially contained in the piping systems has been properly bled off. If

these conditions are not satisfied, air noise will occur within the system.

AIR IN THE HEATING SYSTEM

Persistentair in the heatingsystemmay indicate leaks in thesystem or corrosion taking place.Call

your Installer/Service provider.

OVERHEATING SAFETY

In the event of problem, the overheat safety device causes

safety shutdown of the boiler. If this happens, call your In-

staller/Service provider.

Controls and lighting

The control panel, located at the lower front of the boiler

casing, see diagram, allows the boiler to be started, shut

down, controlled and monitored during use.

Make sure that:

— The boiler is connected to the electrical supply.

— The boiler gas service cock is open.

— The pressure gauge reads between 1 and 2 bar.

The boiler is now ready to start.

icon

User instructions

Controls

1 Safety lockout light

2 Summer/Winter switch

3 Heating temperature control

4 Hot water temperature control

5 Pressure gauge

6 Timeclock

7 Plastic toggles

TO START THE BOILER

Turn selector (2) to the desired Summer or Winter position.

The green lamp will light.

TO STOP THE BOILER

Turn selector (2) to the OFF position (0).

If the boiler is to be out of operation for a long period, turn off the gas service cock.

SETTING TO ‘SUMMER’MODE (HOT WATER ONLY)

Turn selector (2) to the Summer position .

Adjust the domestic hot water control (4) to the desired hot water temperature. The boiler will

operate according to the system requirements.

SETTING TO ‘WINTER’MODE (HEATINGAND HOT WATER)

Turn selector (2) to the Winter position .

Adjust the heating temperature control (3) to the desired temperature.

Adjust the domestic hot water control (4) to the desired hot water temperature. The heating

will operate according to the requirements of the timeclock and room thermostat if fitted or, will

operate according to the system requirements.

Domestic hot water always has priority over central heating.

TO PROGRAM DAILY TIMECLOCK (6) (WINTER MODE ONLY)

Set the current time, by turning the dial clockwise until the current time is shown against the

indicator “ ”.

Push in plastic toggles (7) against the time you wish the heating to come on.

The timeclock can operate in three positions: automatic “ ”, heating off “0”, and heating on “1”.

To select, move the lever to the desired position.

NOTE: In case of failure of electrical supply, timeclock does not operate, having no back-up bat-

tery. Therefore it will be necessary to adjust the current time, once electrical supply is restored.

6icon

User instructions

SAFETY LOCKOUT

If, for any reason, the boiler does not operate, check if lockout lamp (1) is lit. If so, turn

selector (2) to the reset position . The selector is spring loaded and automatically returns to

its’ previous position when released.

Note: This lamp will only light if the boiler has locked out and there is a hot water or central heating

demand at that particular time.

IMPORTANT: If the safety lockout lamp lights frequently, contact your Installer/Service Pro-

vider.

DRAINING AND FILLING

CAUTION: The boiler is installed as part of a sealed system which must only be drained and

filled by a competent person.

Note: If there is persistent loss of system pressure, you must consult your Installer/Service Pro-

vider.

HEATING SAFETY VALVE

CAUTION: A safety valve with a discharge pipe is fitted to this boiler.

Thevalve MUST NOT BE TOUCHED exceptbyacompetent person. If the valve dischargesatany

time, switch the boiler off and isolate it from the electrical supply. Contact your Installer/Service

Provider.

SERVICING/MAINTENANCE

To ensure the continued efficient and safe operation of the boiler, it is recommended that it is

checked and serviced at regular intervals. The frequency of servicing will depend upon the instal-

lation conditions and usage but, in general, once a year should be enough.

CLEANING

The boiler casing can be cleaned with a damp cloth followed by a dry cloth to polish.

Do not use abrasive or solvent cleaners.

BOILER CASING

CAUTION: Do not remove or adjust the casing in any way, as incorrect fitting may result in

faulty operation.

If in doubt, contact your Installer/Service Provider.

icon

Technical data

Technical

data

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Technical data

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Technical data

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DIMENSIONS CONNECTIONS FOR FLUE

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Technical data

HEATING DOMESTIC

WATER

GAS

BOILER SCHEMATIC

1 By-pass

2 Pump

3 Drainvalve

4 Expansion vessel

5 Gas valve

6 Burner

7 Primary heat exchanger

8 Flue hood

9 Air pressure switch

10 Automatic air vent

11 Fan

12 Loss of water switch

13 Heating system safety valve 3 bar

14 Hydraulic 3-way valve

15 Domestic heat exchanger

16 Water valve

RETURN

FLOW

OUTLET

INLET

AVAILABLE PUMP CAPACITY

1–icon 23 t (Automatic By-Pass)

2–icon 28 t (Automatic By-Pass)

Water flow l/h

Pressure m. H2O

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