Santon Premier Plus 210 - Primary Circuit Installation Guide; Boiler Selection Criteria; Indirect Thermal Cut-out and 2-Port Valve; Electrical Wiring Guidelines

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INSTALLATION - PRIMARY CIRCUIT
BOILER SELECTION
• The PremierPlus SystemFit models are suitable for use with most gas, oil red or electric boilers compatible with unvented
systems i.e. tted with a temperature control thermostat and thermal cut-out.
• If in doubt consult the boiler manufacturer.
• Solid fuel boilers or any other boiler in which the energy input is not under effective thermostatic control unless additional
and appropriate safety measures are installed should NOT be used.
• The boiler used can either be a sealed system or open vented type, maximum primary circuit pressure 3 bar.
• The primary ow from the boiler MUST be pumped. Gravity circulation will not work due to the special design of the
primary heat exchanger.
• The boiler ow temperature should usually be set to 82°C (maximum ow temperature to primary heat exchanger
90°C).
• The boiler cannot be vented through the PremierPlus SystemFit unit.
INDIRECT THERMAL CUT-OUT AND 2-PORT MOTORISED VALVE
To comply with Building Regulations and to prevent the PremierPlus SystemFit from overheating the 2-Port motorised valve
supplied tted to the primary ow to the indirect coil MUST NOT be removed or bypassed. This valve is factory wired in
series with the indirect thermal cut-out such that the primary ow to the heating coil is interupted should the PremierPlus
SystemFit unit overheat.
WIRING
All electrical wiring should be carried out by a competent electrician and be in accordance with the latest I.E.E. Wiring
Regulations.
The PremierPlus SystemFit indirect thermostat and thermal cut-out, primary circulating pump and motorised valves are
factory pre-wired. Further wiring will be required between the wiring centre, the programmer, room temperature sensor
and the boiler (Fig 8, page 17). Additional controls and wiring will be required if a second CH zone is to be tted to the
instalation.
The indirect thermal cut-out MUST NOT be bypassed.
HEATING SYSTEM CONTROLS
The controls provided with the PremierPlus SystemFit will ensure the safe operation of the unit within a central heating
system.
Connection to the various system components is made via the wiring centre tted to the front of the PremierPlus SystemFit,
refer to gure 8, page 17 and the terminal identication labels within the wiring centre to aid in connecting the various
external system components such as the mains supply, programmer and boiler. The wiring to the external components is
made using exible cable, this should be secured using the integral cable grips located in the wiring centre.
Provision is made for the connection of a second CH zone (connection pipe supplied blanked off). Additional controls will
be necessary to control the operation of the second CH zone, usually a second 28mm CH zone valve and a programmable
room thermostat. Connection terminals are provided and identied in the wiring centre to enable any wiring to be connected
to the same central position.
The mains supply must be via a double pole isolating switch with a contact separation of at least 3mm in both poles. The
supply must be fused 3 amp. A supply cable of 1.0 to 1.5mm
2
cross sectional area should be used.