Technical data

ManualsBrandsWorcester ManualsHome building and DecorW 125 FL

6 720 606 003 (01.09) AL

W 125 FL

Flueless Singlepoint Water Heater

with Atmosphere - Sensing Device

INSTALLATION AND

SERVICING INSTRUCTIONS

G.C. Nº 52-311-022

This appliance conforms to European Standard EN 26.

It is the law that all gas appliances are installed by competent persons.

The following instructions should be read carefully as the manufacturer cannot be held responsible for any

damage to property, persons or animals caused by incorrect installation or operation of the appliance.

It is recommended that the appliance be serviced annually by a competent person or the local Gas Region.

The Users Instructions should be handed to the user and the function and operation of the appliance

explained.

For your safety - if you smell gas:

1. Turn off the appliance

2. Open all windows and doors

3. Do not operate any electrical switches

4. Extinguish all naked flames

5. Contact the local Gas Region immediately

Summary of content (12 pages)

PAGE 1
W 125 FL Flueless Singlepoint Water Heater with Atmosphere - Sensing Device INSTALLATION AND SERVICING INSTRUCTIONS G.C. Nº 52-311-022 6 720 606 003 (01.09) AL For your safety - if you smell gas: 1. Turn off the appliance 2. Open all windows and doors 3. Do not operate any electrical switches 4. Extinguish all naked flames 5. Contact the local Gas Region immediately This appliance conforms to European Standard EN 26. It is the law that all gas appliances are installed by competent persons.
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CONTENTS page 1 2 3 4 5 6 1 Installation Regulations ...................................... General information ........................................... Technical Data ................................................... Siting the appliance ........................................... Air supply ........................................................... Gas supply ........................................................ 2 2 5 5 5 6 Installation Regulations page 7 8 9 10 11 12 Installation .........
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Appliance water flow diagram. F869_086 Natural Gas Fig. 2 L.P.G.
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D770_046 Dimensions (in mm) Fig.
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3 Technical Data Table 1 - GENERAL Minimum rated output (Pmin) Maximum rated output (Pn) Rated input (Qn) Gas rate (maximum) Number of injectors Injector diameter (mm) Pilot injector marking Burner pressure Height (mm) Width (mm) Depth (mm) Dry weight Natural Gas 4.4 kW 8.7 kW 10.4 kW 3 1.1 m /h 8 1.1 111 9 mbar 438 270 189 7.0 kg LPG 4.4 kW 8.7 kW 10.4 kW 0.8 kg/h 8 0.70 70 15 mbar 438 270 189 7.
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Gas supply The appliance requires 1.1 m3/hr of gas. The gas meter and supply pipes must be capable of supplying this quantity of gas in addition to the demand from any other appliances being served. Refer to BS 6891 for further information. The meter governor should deliver a dynamic pressure of 20 mbar (8 in w.g.) at the appliance. The complete installation, including the gas meter, must be tested for soundness and purged. Refer to BS 6891.
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d) Turn on the gas service cock. e) Move the gas control slide to the ignition position. See fig. 6. i) G661_013 j) k) Fig. 6 Observe the pilot burner. Press in the central button of the control slider and hold depressed while pushing the Piezo igniter button two or three times. The pilot should light. Wait approximately twenty seconds and then release the centre button of the control slider. The pilot should remain alight. If the pilot does not light, repeat the operation until a flame is established.
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Take care not to damage the two ‘O’ ring seals. Unscrew the large heat exchanger retaining screw, located at the rear of the combustion chamber just above the burner blades, and lift clear the heat exchanger assembly. In hard water areas it may be necessary to descale the heat exchanger body. A proprietary brand of descaler should be used. Fill the heat exchanger with this solution and leave until the solution stops bubbling. Drain and thoroughly wash out the exchanger with clean water.
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supply at the inlet cock. Open the taps to release any remaining water pressure and drain the appliance. c) Remove the water discharge pipe. d) Undo the union connection on the water isolating cock. e) Pull out the retaining clips at the inlet and outlet connections on the water control body, and spring out the copper inlet and outlet pipes from the control body. Take care not to damage the two ‘O’ ring seals.
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11 Spare Parts Fig.
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Parts List Description Propane Natural Gas 1 Front Cover 8 705 411 730 2 Temp.
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Worcester Heat Systems Limited, Cotswold Way, Warndon, Worcester WR4 9SW. Telephone: (01905) 754624. Fax: (01905) 754619 This booklet is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or appearances are changed in the interests of continued improvement. All goods sold are subject to our official Conditions of Sale, a copy of which may be obtained on application 6 720 606 003 (01.