Compartment Installation; Condensate Drainage - Keston Celsius 25 Installation And Servicing Instructions

WD209/1/2000
2.10

COMPARTMENT INSTALLATION

Due consideration should be given to BS5440 pt 1 with regard to compartment ventilation
requirements. High and low level ventilation is required for cooling purposes as follows:
Position of air vent
High
Low
Both vents must communicate to the same room or be on the same wall to outside.
2.11

CONDENSATE DRAINAGE

Being a condensing boiler, the Celsius 25 is fitted with a condensate trap at the base of the
heat exchanger and flue assembly, with facility to connect to a drain point underneath the
appliance.
Use only plastic piping and do not reduce below 15 mm internal diameter within the
dwelling. Condensate should preferably be drained into the sanitary waste system or,
alternatively, the rainwater system of the property in most cases. Ensure in all cases that
the disposal of the condensate is in accordance with any local regulations in force.
Termination of the pipe must be either at a branch or stack internal to the house, or
externally at an open gully. Alternatively, discharge into a purpose made condensate
soakaway can be considered. Existing or purpose built drains must use suitable corrosion
resistant material as condensate is mildly acidic.
The connection to the condensate drain of the boiler, and the condensate drain pipework
itself, should be properly sealed to ensure there is no possibility of leakage into the
dwelling.
A minimum slope downwards towards the drain of 1 in 20 is essential. Freezing of the
termination and pipework must be prevented. Any drainage pipes outside the property
must be at least 32 mm inside diameter.
Installation & Servicing Instructions
Chapter 2 - Boiler Connections
Air from room
306 cm 2
2
306 cm
The Keston Celsius 25 & 25P
Air direct from Outside
153cm 2
2
153cm
Page : 14