guide.qxp layout 1 - worcester, bosch group · checking your system pressure a sealed system relies...

Guide.qxp_Layout 1 03/05/2016 13:15

2 System Filling Guide

System FillingGuide

Checking your system pressure .................................................................... 3

Which is your filling link? .............................................................................. 4

Operating your external filling link ................................................................ 5

Operating your keyed filling link .................................................................... 6

Operating your keyless filling link .................................................................. 7


Checking yoursystem pressure

A sealed system relies on anoperating pressure of between1 and 1.5 bar to deliver heatingand hot water at a consistentlycomfortable and reliable level.

The gauge is designed to clearlyshow the system pressure whilein operation and the green areaon the display indicates wherethe needle should be.

Ideally, the needle should besomewhere within section A asshown in the diagram.

When the needle is seen in thered area, the boiler and systemwill probably not function atit’s best. If this is observedfrequently, it could indicate aleak in the system, where theneedle is at its lowest, or aproblematic system or boilerfault when the needle is at itshighest. In this case your boileris fitted with safety features thatwill either discharge any over-loading of the system or, wherenecessary, shut off the boiler.

To maintain the high efficiency of your boiler and heating system, it is advisedthat you regularly check the system operating pressure as indicated by thegauge located on the fascia panel of your appliance.

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0 4bar

A

Min

1 bar

1.5 bar

Max

In cases where the pressure fallsbelow the minimum operating level,the system can be easily refilled usingthe appropriate method shown in thisguide.

It is advised that should the systemneed refilling on a very regular basis, aplumber should be called to check forleaks in pipes or more likely, radiatorvalves.

Should there be evidence that the boileris frequently exceeding the operatingpressure or regularly discharging orshutting down, then a heating engineershould be called.

3System Filling Guide


Which is yourfilling link?

External filling linkA looped hose method.

Usually unconnected, thiswill loop upwards ordownwards and will beexternally located eitherbeneath or beside andclose to the boiler.

There are 3 different methods, depending on which the installer has fitted,by which you can refill your system. 2 are attached to the boiler the otherwithin the vicinity of the appliance.

Keyed filling linkAn integral method.

This is connected toand found beneath andto the right of theboiler. It is operated bya key which is locatedin the removable panelbeneath the boiler.

Keyless filling linkAn integral method.

This is connected toand found beneath andto the right of the boiler.It is operated by anintegral lever. Access via removablepanel beneath the boiler.

All 3 methods are easy to use. Watch the gauge closely as the system fills. Itmay fill quite quickly so be ready to shut off the link when the needle isbetween 1 and 1.5 bar.

If the pressure is or rises above 1.5 bar. Bleed a radiator until the pressuregauge returns to between 1 and 1.5 bar.



Operating yourexternal filling linkIn the case of the external filling link, you may find that it is different to thebelow in that it might be connected and has 2 levers or screwdriver slots. Thefilling operation is the same, but if found connected it is best to leave it asinstalled.

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4.4.

231

0 4bar

A

Min

1 bar

1.5 bar

Max

5.5.

6.6.

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1. Unscrew blankingcap.

2. Attach the hose tothe valve, screw onhand tight.

3. Turn handle/screwdriverslot through 90° to openvalves.

4. The handle/screwdriverslot will be in line with thevalves.

5. When the pressure reaches between the 1 and1.5 bar marks (zone A), turn the handle/screw-driver slot back, through 90° to the valves.

6. The handle/screwdriver slot will be 90° to thevalves.

7. Remove the hose andreplace the blanking cap.



Operating yourkeyed filling linkIn the case of the keyed filling link, it is necessary to locate the key (seeabove). Remove the bottom panel by pulling the catch down and then pullingthe panel forward and down to remove. If the key is displaced you may ordera spare key by calling customer service: 0330 123 9559.

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1. Push the filling keyfirmly into the bodyof the filling link,ensuring the arrowin the key shaft linesup with the openpadlock symbol.

2. Turn the key to theright, to the stop,ensure the key islocked and that itcannot still turn. The arrow shouldnow line up withthe closed padlocksymbol.

3. Turn the white knob tothe left, this will allowwater to fill the system.

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4. When the pressure,shown on the pressuregauge, reaches betweenthe 1 and 1.5 bar marks(zone A), turn the whiteknob to the right to closethe valve. Do not over-tighten.

5. Turn the key to theleft, to the stop, sothat the arrow linesup with the unlockedpadlock symbol andpull the key straightdown.Please remember tostore the key in thebottom panel.

231

0 4bar

A

Min

1 bar

1.5 bar

Max

4.



Operating yourkeyless filling linkIn the case of the keyless filling link, the system is filled using an integrallever. To access the filling link, remove the bottom panel by pulling the catchdown and then pulling the panel forward and down to remove.

231

0 4bar

A

Min

1 bar

1.5 bar

Max

The integral fillinglink will be located tothe right hand sideof the appliance.

1. Pull the blue leverdown to begin thefilling process.

Monitor the systempressure gauge onthe appliance fascia.

When the needlereaches between the1 and 1.5 bar marks(zone A), release theblue lever to stop thefilling process.

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guide.qxp layout 1 - worcester, bosch group · checking your system pressure a sealed system relies...

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