Gravity Drain min. fall 3°
Max. Head
3.5metres
Min. radius 100mm
Point ‘A’
Note: The point of discharge from the pumped length of condensate pipe (point ‘A’) must be 150mm above the base level of the boiler, whether discharging direct into a drain or into an additional gravity drain.
Boiler
5.0Site Requirements
5.9Condensate Drain - General
Failure to install the condensate discharge pipework correctly will affect the reliable operation of the boiler.
1.Ensure the discharge of condensate complies with any national or local regulations in force.
BS 6798 & Part H1 of the Building Regulations give further guidance.
2.If any further drain pipe is required (additional to that supplied with the boiler), it should be run in a proprietary material
e.g. PVC,
3.Metal pipework is NOT suitable for use in condensate discharge systems.
4.Any pipe fitted externally must be kept as short as possible to minimise the potential of freezing and must be insulated using waterproof material.
5.When discharging condensate into a soil stack or waste pipe the effects of existing plumbing must be considered.
5.10Condensate Disposal (Fig. 12)
1.This boiler incorporates an automatic pumped condensate system. The pump is submerged in a sump assembly and is activated by the discharge float switch. A second (safety) float switch is fitted.
2.The pump has an effective head of 3.5 metres. The condensate outlet is positioned at the top right front of the boiler. It is 10mm diameter plastic.
| 3. 3.5 metres of flexible 10mm condensate discharge pipe and a | |
Fig. 12 | 10mm push fit elbow are supplied with the boiler. | |
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| 4. The 10mm pipe can be routed to a maximum of 3.5 metres | |
| vertically and then discharge via gravity or be routed | |
| horizontally. A combination of vertical and horizontal runs is | |
| permissible. | |
| 5. The pipe must be adequately supported, either using suitably | |
| spaced clips or run within larger diameter pipe. When using clips | |
| take care not to deform the pipe. | |
| 6. When routing the pipe through a wall it must be suitably | |
| sleeved. Also the pipe must not be exposed to sources of heat, | |
| and should be protected in locations where it may be damaged. | |
| 7. The pipe should be routed so that any sharp bends, dips and | |
| loops are avoided. A minimum radius of 100mm is | |
| recommended for any bends. No slope is necessary and air | |
| breaks are not required on the pumped part of the condensate | |
| run. | |
| 8. Any part of the condensate drain system that is outside the | |
| dwelling, or in an unheated part of it must be at least 21.5mm | |
| diameter. | |
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18© Baxi Heating UK Ltd 2009
