Specifications

22
If the user temperatures or On and Off times have been adjusted for commissioning purposes
the controller should be reset to the desired settings. The operation of the controller should be
demonstrated to the user and the Controller Installation and User Instructions left with them for
future reference.
6.5 AUTOMATIC SYSTEM BY-PASS
An automatic differential bypass valve is tted to the Premier Plus SystemFit. This has been fac-
tory set to an optimum position for most domestic heating systems. However, in some systems it
may require further adjustment. To do this:
Loosen the brass locking screw on the top of the adjustment cap of the bypass valve. Turn the
adjustment knob fully clockwise so that the number 5 coincides with the indicator arrow on the
body of the valve.
Turn on the system and set the controller to Heating only. Balance the system in the normal
manner.
With the boiler ring and the pump running, slowly turn the adjustment knob anti-clockwise until
hot water can be felt on the outlet side of the bypass valve. Turn the adjustment knob clockwise
by half a turn. Lock in position by tightening the brass locking screw.
6.5 BENCHMARK
TM
LOG BOOK
On completion of the installation and commissioning procedures detailed in this manual the
Benchmark
TM
“Installation, Commissioning and Service Record Log Book” should be completed
and signed off by the competent installer or commissioning engineer in the relevant sections.
The various system features, location of system controls, user instructions and what to do in
the event of a system failure should be explained to the customer. The customer should then
countersign the Benchmark
TM
log book to accept completion.
The log book should be left with the customer along with these instructions. The log book
includes sections that should be lled in when any subsequent service or maintenance operation
is carried out on the Premier Plus SystemFit.