Issue 1 06/02/20
27
Commissioning
7
7 Commissioning
7.1 General
After filling the installation with water in the previous section
please follow the following steps to complete the installation of
the unit.
7.2 Checklist Before Commissioning
7.3 Commissioning Procedure
• Check all water connections for leaks and rectify as
necessary.
• Turn off mains water supply.
• Remove the pressure reducing valve head work to
access the strainer mesh, clean and re-fit.
• Turn the water supply back on.
• Manually open, for a few seconds, each relief valve in turn,
checking that water is discharged and runs freely through
the tundish and out at the discharge point.
• Ensure that the valve(s) reseat satisfactorily.
• The installation must comply with G3 of the Building
Regulations.
Warning
Do Not operate the primary circuit until the cylinder has
been filled with water.
7.3.1 Indirect units
• Fill the indirect (primary) circuit following the heat source
manufacturer’s commissioning instructions.
• To ensure the cylinder primary heat exchanger is filled, the 2
port motorised valve (supplied with the unvented kit) should
be manually opened by moving the lever on the motor
housing to the MANUAL setting. When the primary circuit is
full return the lever to the AUTOMATIC position.
• Switch on the heat source, ensure the programmer is set to
Hot Water and allow the cylinder to heat up to a normal
working temperature 65°C (recommended).
