Bedienungsanleitung Worcester-Bosch Greenstar Danesmoor Utility Regular - Utility System (Seite 15 von 64) (Englisch)

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Pre-Installation

Greenstar Danesmoor Utility 2022+ and Utility System 2022+ - 6 721 846 263 (2022/01) 15

4.5 Condensate discharge

For correct installation and trouble free operation of the appliance the

following advice should be followed:

1. All condensate pipework must ‘fall’ from the appliance by a minimum

of 3 degrees (52mm per metre) to ensure adequate condensate

flow.

2. The pipework route must allow air to be supplied back to the

appliance for correct operation of the condensate trap.

3. Connection to a rainwater down pipe must include an air break.

Also:

• Keep external pipework as short as possible and not exceed 3 metres

length.

• External pipework should be increased to a minimum diameter of

32mm and ideally be insulated.

• Minimise the number of bends and connectors.

• Remove burrs after cutting pipe.

• Remove surplus solvent from the interior of the pipe.

4.5.1 Condensate pipe work

4.5.2 Internal connections

In order to minimise risk of freezing during prolonged cold spells, the

following methods of installing condensate drainage pipe should be

adopted, in order of priority.

Wherever possible, the condensate drainage pipe should be routed and

terminated so that the condensate drains away from the boiler under

gravity to a suitable internal foul water discharge point such as an

internal soil and vent stack. A suitable permanent connection to the foul

waste pipe should be used.

Fig. 13 Disposal to soil vent stack

Alternatively if the first option is not possible an internal kitchen,

bathroom or washing machine waste pipe etc. can be used.

Ensure that the condensate drain pipe is connected “down stream” of

the waste trap.

Fig. 14 Disposal to a waste pipe

CONDENSATE PUMP

Where “gravity discharge” to an internal termination is not physically

possible, or where very long internal runs would be required to reach a

suitable discharge point, condensate should be removed using a

proprietary condensate pump, of a specification recommended by the

boiler or condensate pump manufacturer.

The pump outlet pipe should discharge to a suitable internal foul water

discharge point such as an internal soil and vent stack or if not possible

to internal kitchen, bathroom or washing machine waste pipe etc. A

suitable permanent connection to the foul waste pipe should be used.

Fig. 15 Condensate pump disposal

Follow HHIC guidance and recommendations for

condensate disposal

NOTICE:

▶ Where a new or replacement boiler is being installed,

access to an internal “gravity discharge” point should

be one of the factors considered in determining

boiler location.

▶ The condensate pipe must be nominally

21.5mm Ø polypropylene pipe.

▶ The condensate pipe work must fall at least 52mm

per metre towards the outlet and should take the

shortest practicable route.

▶ Ensure there are no blockages in the pipe run.

NOTICE: Unheated internal areas.

The condensate discharge may freeze in areas during

prolonged cold temperatures.

▶ Internal pipe runs in unheated areas such as lofts,

basements and garages should be treated as external

runs.

Key to condensate illustrations, figures 12, 13, 14 & 15

1 Condensate discharge from boiler

2 Soil and vent stack

3 Minimum 450mm and up to three storeys

4 Visible air break at plug hole

5 Sink or basin with integrated overflow

6 75mm sink waste trap

7Condensate pump

Table 5 Key to Internal condensate disposal methods

6720644744-06.4Wo

21.5mm Ø

6720819188-03.3Wo

21.5mm Ø

75mm

min.

75mm

min.

21.5mm Ø

6720819188-12.2Wo

21.5mm Ø

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