Technical data

COMMISSIONING
At the time of commissioning, please ensure all relevant sections of the Benchmark Checklist, (Page 24 and 25) of this
document are completed.
FILLING THE UNIT WITH WATER
Check expansion vessel pre-charge pressure. The vessel is supplied precharged to 3.5 bar to match the control •
pressure of the pressure reducing valve. The precharge pressure is checked using a car tyre gauge by unscrewing
the plastic cap opposite the water connection.
Check all connections for tightness including the immersion heater(s). An immersion heater key spanner is supplied •
for this purpose.
Ensure the drain cock is CLOSED. •
Open a hot tap furthest from the PremierPlus cylinder.•
Open the PremierPlus stop cock to ll the unit. When water ows from the tap, allow to run for a few minutes to •
thoroughly ush through any residue, dirt or swarf, then close the tap.
Open successive hot taps to purge the system of air.•
SYSTEM CHECKS
Check all water connections for leaks and rectify as necessary.•
Turn off PremierPlus water supply.•
Remove the pressure reducing valve head work to access the strainer mesh, clean and re-t.•
Manually open 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.•
DIRECT UNITS
Switch on electrical supply to the immersion heater(s) and allow the cylinder to heat up to normal working temperature.
If necessary the temperature can be adjusted by inserting a at bladed screwdriver in the adjustment knob on top of the
immersion heater thermostat and rotating, see Fig 8, page 12 for adjustment details. Check the operation of thermostat(s)
and that no water has issued from the expansion relief valve or temperature/pressure relief valve during the heating cycle.
INDIRECT UNITS
Fill the indirect (primary) circuit following the boiler manufacturer’s commissioning instructions. To ensure the PremierPlus
cylinder primary heat exchanger is lled, the 2 port motorised valve (supplied) 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 boiler, ensure the programmer is set to Domestic Hot Water and allow the PremierPlus cylinder to heat
up to a normal working temperature. If necessary the temperature can be adjusted by inserting a at bladed screwdriver in
the adjustment knob (located on top of the thermostat mounting bracket - see Fig 8, page 12) and rotating. The minimum
thermostat setting is 10°C. The maximum thermostat setting is 72°C.
Check the operation of the indirect thermostat and 2 port motorised valve and that no water has issued from the expansion
relief valve or temperature/pressure relief valve during the heating cycle.
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