Specifications

20
6.1 FILLING AND FLUSHING THE PREMIER PLUS SYSTEMFIT
It is possible for compression ttings to become loose in transit due to transport vibration.
Ensure that all ttings and immersion heaters are correctly tted and tightened. An immersion
heater key spanner is provided to aid in tightening the immersion heater(s).
i) Open a hot tap furthest from the Premier Plus SystemFit .
ii) Open the isolating valve to the Premier Plus SystemFit installation. Open the mains stop
cock to ll the unit. When water issues from the tap, allow to run for a few minutes to
thoroughly ush through any residue, dirt or swarf, then close tap.
iii) Open successive hot taps and any cold outlet supplied by a balanced take off to purge any
air from the system.
iv) Check all connections for leaks and rectify as necessary.
v) The Strainer housed within the Cold Water Combination Valve should be cleaned to
remove any debris that may have been ushed through the main supply pipe. Refer to
Section 8.3 for instructions on how to do this.
6.2 CHECK THE OPERATION OF THE SAFETY
VALVES
i) Slowly manually open, for a few seconds, the Temperature and Pressure Relief Valve
situated on the Premier Plus unit (see Diagram 11). Check water discharged runs
freely away through the tundish and discharge pipework. Close valve, ensure
water ow stops and valve reseats correctly.
ii) Repeat for the Expansion Valve situated on the Expansion Core Unit (see Diagram 11).
6.3 DIRECT HEATING
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. 60
o
C is recommended
(between graduations 4 and 5 on the thermostat). 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 Diagram 7). The adjustment range 1 to 5 represents a temperature
range of between 10
o
and 70
o
C.
Check that no water is discharged from either the Expansion Valve or Temperature and Pres-
sure Relief Valve during the heating cycle.
6.4 INDIRECT (PRIMARY) CIRCUIT
Fill the indirect (primary) circuit following the boiler manufacturer’s commissioning instructions.
To ensure the primary heating system is correctly lled the 2-port motorised valves should be
manually opened by moving the lever on the motor housings to the MAN OPEN setting. When
the primary circuit is full return the levers to the AUTO position. Vent any trapped air. Check the
6
Commissioning
primary system for leaks and rectify as necessary. Flush the primary system in accordance with
the boiler manufacturers instructions and add a suitable inhibitor when re-lling.