IN1233
Edition 2
Installation Servicing Instructions
25
TDA Thermodual Installation Manual
Install the buffer layering valve between the accumulator and return temperature kit as per
the diagram below.
9.10 Buffer
Layering Valve
A-B-AB Valve
I-II-III Valve
II
III
I
Description
I
Return to boiler
II
Return from accumulator middle
III Return from accumulator bottom
Set Valve to normally open
Description
AB Return to boiler
B
Return from accumulator middle
A
Return from accumulator bottom
Set valve to normally open
AB
B
A
Install auto air vents on all pipework where air may get trapped in the system. Ensure the
automatic air vents are installed vertically with the inlet at the bottom.
9.9 Auto Air
Vent