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4.6.4. Connection and draining of condensates
Removal to the drains, via a drain point, using a P.V.C tube
(minimum diameter 32 mm) is mandatory because the
condensates are acid and thus aggressive (pH between 3 and 5).
Use a sufficient slope of minimum 3% to ensure correct flow of
the condensates.
All pipework and fittings in the condensate drainage system MUST
be compatible with condensate. Refer to either BS 6644:2011 or
the Building Regulations for materials that should be used.
IMPORTANT:
Neutralise these condensates before removal according to the current
regulations.
4.7. Hydraulic connection
The following must be fitted to the cold water pipe:
either:
•
the HAMWORTHY hydraulic kit (ref 031272),
or:
• an isolation valve,
• a drain valve.
•
an anti-return flap
•
a safety valve rated at 7 bar in compliance with standard NF P 52.001
and its system for evacuating directly to the sewer.
The following must be fitted to the hot water pipe:
•
a pressure gauge (check that the maximum working pressure does
not exceed 7 bar).
REMINDER
: In accordance with the DTU, the installer must ensure that an
automatic drain valve is fitted at the high points of the installation.
WARNING:
The components used to seal the connections must be WRAS or
equivalent certified products.
IMPORTANT:
In operating conditions where the hot water outlet temperature is over
60°C, the installation must comply with the applicable regulations. A
safety mixer tap may be required to obtain an acceptable temperature
at the point of use.
IMPORTANT:
The DHW temperature must always remain below the maximum
operating temperature of the domestic water pipes (especially
when using PER or PVC pressure pipes) and the components of the
hydraulic circuit.
WARNING:
The product is not fitted with a drain tap. A drain valve must be
installed on the cold water inlet to allow the product to be drained.
13.01.2023
Page 31 / 104
DORCHESTER DR-SG -
Installation, Operation and Maintenance