24
Benchmark
TM
On completion of any maintenance or service of the Andrews Flexistor, the Benchmark
TM
“Installation,
Commissioning and Service Record”, Pages 32 & 33, should be filled in to record the actions taken
and the date the work was undertaken.
Maintenance
Under normal circumstances the control valves should not require any maintenance. However,
annual inspection and/or cleaning of the integral strainer , pressure reducing valve cartridge,
expansion relief valve cartridge and seating may be necessary depending on local water
conditions.
Pressure reducing valve
Isolate cold water supply and drain system if necessary
Unscrew the retaining nut of the valve. The complete operating mechanism, including the strainer
can be removed. Clean the filter mesh and cartridge ensuring that the strainer is correctly located
and reassemble the unit.
Expansion Valve
Isolate cold water supply
Unscrew expansion relief cartridge from body and clean the filter mesh and cartridge.
Clean valve seat face and seating – do not scratch or damage either seal face or seating,
Refit in reverse order. Do not over tighten.
Warnings
IF WATER DISCHARGES FROM THE TEMPERATURE / PRESSURE RELIEF VALVE ON THE
Andrews Flexistor UNIT REFER TO FAULT FINDING TABLE FIRST FOR GUIDANCE. IF THIS
DOES NOT RECTIFY THE FAULT SWITCH OFF ELECTRICAL SUPPLY TO THE IMMERSION
HEATER(S) [AUXILIARY HEATING] OR SHUT DOWN THE EXTERNAL HEAT SOURCE
[IF CONNECTED]. DO NOT TURN OFF THE WATER SUPPLY. CONTACT A COMPETENT
INSTALLER FOR UNVENTED WATER HEATERS TO CHECK THE SYSTEM.
DO NOT TAMPER WITH ANY OF THE SAFETY VALVES FITTED TO THE ANDREWS
FLEXISTOR SYSTEM, IF A FAULT IS SUSPECTED CONTACT A COMPETENT INSTALLER.
Summary of Contents for Flexistor 1000
Page 30: ...30 38 Part No 95 607 690 46 Part No 95 980 009 2 1 34 1 46 ...
Page 31: ...31 48 38 30 38 31 32 ...
Page 32: ...32 ...
Page 33: ...33 ...
