22
Commissioning
Filling and flushing the
Andrews Flexistor
Ensure that all fittings and immersion heaters are correctly fitted and tightened.
i)
Open a hot tap furthest from the Andrews Flexistor.
ii)
Open the mains stop cock to fill the unit. When water issues from the tap, allow to run for a few
minutes to thoroughly flush through any residue, dirt or swarf, then close tap.
iii)
Open successive hot taps to purge any air from the system.
iv)
Check all connections for leaks and rectify as necessary.
v)
The Strainer housed within the Pressure Reducing Valve should be cleaned to remove
any debris that may have been flushed through the main supply pipe.
Check the operation of the Safety Valves
i)
Slowly, manually open for a few seconds, the Temperature and Pressure Relief Valve
(T&P Valve) situated on the
Andrews Flexistor unit. Check water discharged runs freely
away through the tundish and discharge pipe work. Close valve, ensure water flow stops
and valve reseats correctly.
ii)
Repeat for the Pressure Relief Valve.
NOTE
: The water discharged may be very hot.
Primary Heat source (when fitted)
Connect up primary heat source as per manufacturers instructions. Fill up primary and second-
ary circuits, bleeding any air that may be trapped and check for leaks. Make sure secondary cir-
cuit has wholesome water only, the Flexistor range of cylinders do not have an internal heat ex-
changer. Take care that the Primary Heat source can handle the working pressure of the cylinder.
Auxiliary power supply (Immersion Heaters)
Switch on the electrical supply to the immersion heater(s) and allow the unit to heat up. Check
that the thermostat operates correctly. A storage temperature of approx. 60ºC is recommended,
install and set up immersions as per immersion heater fitting instructions (36006161) . Check
that no water is discharged from either the Expansion Valve or Temperature and Pressure Relief
Valve during the heating cycle. The thermal cut-out is factory set to 80°C max for direct heating
Benchmark
tm
Log Book
On completion of the installation and commissioning procedures detailed in this Product Guide
the Benchmark
TM
“Installation, Commissioning and Service Record Log” 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
commissioning checklist to accept completion. The Service Record should be
filled in when any subsequent service or maintenance operation is carried out on the
Andrews
Flexistor unit.
See pages 32 and 33 for Benchmark
TM
logbook and service record
Summary of Contents for Flexistor 1000
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Page 31: ...31 48 38 30 38 31 32 ...
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