INTRODUCTION
The PremierPlus SystemFit is a factory pre-plumbed and wired PremierPlus unvented water heater. The PremierPlus SystemFit
is manufactured in the UK from top quality materials and meets all the latest relevant safety and constructional standards.
The high grade Duplex stainless steel cylinder offers exceptional strength and corrosion resistance which is backed by a 30
year guarantee (see terms and conditions on page 25). Its performance, control system and insulation levels exceed the
latest requirements of Building Regulation Part L.
The PremierPlus SystemFit unvented water heater can be fed directly from the cold water mains supply to the property
without the need for separate feed cisterns or vent pipes. It is supplied tted with all its necessary inlet and safety controls for
compliance with Building Regulations. Also tted are a primary circulating pump, automatic bypass valve, a ow balancing
valve, 2 x 2 port motorised valves, primary lling loop and pressure gauge, a cylinder thermostat, thermal cut-out and
wiring centre. The pump, motorised valves and thermal controls are supplied pre-wired. A heating and domestic hot water
programmer, room temperature sensor, primary expansion vessel, automatic air vent and primary expansion relief valve
are supplied loose for installation at a convenient position within the property. An electric immersion heater is also tted to
enable the unit to be heated should the boiler be turned off.
The PremierPlus SystemFit primary circuit can be connected to a variety of gas or oil red boiler types, either open vented
or sealed system. It is not recommended for use with “system” boilers as these already incorporate their own circulating
pump and controls.
NOTE: If using a sealed heating system, adequate provision for expansion within the primary circuit MUST be provided
by tting the primary circuit expansion vessel supplied. Primary circuit expansion cannot be accommodated within the
PremierPlus SystemFit. Ensure the primary circuit expansion relief valve (supplied) is tted to the primary circuit.
The safety valves tted to the PremierPlus SystemFit protect the water heater only. Failure to provide adequate primary
system pressure relief when using a sealed heating system will invalidate the boiler manufacturer’s warranty. Consult the
boiler manufacturer’s installation instructions for further advice.
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