INSTALLATION
INSTALLATION
26 CONNECTING THE FLUE TO THE |
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BOILER |
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Note. Before fitting the flue turret fill the condensate trap or |
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siphon trap within the boiler by pouring a cupful of |
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water into the flue outlet. Take care to ensure that the |
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water is only poured into the flue outlet, and does not |
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spill into the boiler casing. |
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1 Insert the flue assembly through the prepared hole in the |
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wall (ensuring the 145mm minimum dimension is |
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maintained). |
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2 Fit the inner (plastic) and outer (rubber) wall gaskets to the | 4 | |
flue terminal pipe. |
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3 Locate the gasket and flue turret on the top of the boiler.
CHECK THAT THE FLUE SEAL LOCATED IN THE TOP |
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OF THE RECUPERATOR IS SECURE AND GIVING AN | 3 |
EFFECTIVE SEAL. |
4Locate the flue into the turret and push to ensure full engagement.
5Secure the flue turret on top of the boiler using the four screws provided.
6Flues over 1 meter long.
Fix the flue support bracket to the wall, using the two wall plugs and wood screws provided.
27 SAFETY VALVE DRAIN | Pressure |
| relief valve |
The discharge pipe should be positioned so that the discharge of water or steam cannot create a hazard to the occupants of the premises or damage to electrical components and wiring.
Discharge pipe
28 CONDENSATE DRAIN
Refer also to the British Gas document: “Guidance Notes for the installation of Domestic Gas Condensing Boilers” (1989).
The condensate drain provided on the boiler must be connected to a drainage point, preferably within the building.
The boiler includes a trap that prevents combustion products entering the drain. However an additional trap with a seal of at least 75 mm and an air break between the traps is required if the condensate drain pipe is connected to sanitary pipework.
Condensate drain
Additional trap
The length of the condensate pipe should be kept at minimum and must be arranged so that obstruction (e.g.
through freezing) of external drainage pipework does not give rise to spillage within the dwelling.
If a part of the drainpipe runs externally this part should be kept as short as possible and protected to reduce the risk of freezing.
IMPORTANT
If excessive external pipework cannot be avoided an additional condensate removal pump (available as an option) and insulation are recommended to prevent possible freezing.
The drain outlet on the boiler is a 25 mm o.d. plastic pipe. This size must not be reduced below 21.5 mm o.d. (standard overflow pipe) in any part of its length.
All pipework and fittings in the condensate drain system must be made of plastic. No other materials may be used.
To avoid condensate being trapped:
---the drainpipe should be run with a fall of at least 2.5û (45 mm/m) away from the boiler;
---the number of bends and joints should be kept at minimum;
---the drainpipe should be adequately fixed to pevent pipe sagging.
24 | mini HE |
