Santon Premier Plus 210 - Additional General Installation Details; Drain Taps Usage; Hot Water Outlet Pipework; Secondary Circulation System

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DRAIN TAPS
Drain taps are tted to both the primary system pipework and to the cold water inlet to facilitate draining the unit or indirect
heating circuit for maintenance purposes. It is recommended that the outlet point of the drain pipe work be at least 1 metre
below the level of the heater (this can be achieved by attaching a hose pipe to the drain tap outlet spigot).
HOT WATER OUTLET
Ideally the pipework from the PremierPlus SystemFit to the outlet ttings should be in 22mm pipe with short runs of 15mm
pipe to showers and basin taps. Small bore pipe can also be used to suit some taps, but runs should be of minimum length.
Pipe sizes may vary due to system design.
SECONDARY CIRCULATION
If secondary circulation is required it is recommended that it be connected to the PremierPlus SystemFit cylinder as shown
in Fig 4 below via a swept tee joint into the cold feed to the unit. A swept tee joint is available as an accessory (order code
no. 94 970 033).
The secondary return pipe should be in 15mm pipe and incorporate a check valve to prevent backow. A suitable WRAS
approved bronze circulation pump will be required. On large systems, due to the increase in system water content, it may be
necessary to t an additional expansion vessel to the secondary circuit. This should be done if the capacity of the secondary
circuit exceeds 10 litres.
Pipe capacity (copper):
15mm O.D. = 0.13 l/m (10 litres = 77m)
22mm O.D. = 0.38 l/m (10 litres = 26m)
28mm O.D. = 0.55 l/m (10 litres = 18m)
WARNINGS
i) Under no circumstances should the factory tted temperature/pressure relief valve be removed other than by authorised
Santon personnel. To do so will invalidate any guarantee or claim.
ii) The cold water combination valve must be tted to the mains water supply to the PremierPlus SystemFit unit.
iii) No control or safety valves should be tampered with.
iv) The discharge pipe should not be blocked or used for any other purpose.
Cold inlet
connection
Check
valve
Secondary
circulation
pump
Swept
tee
Cold
supply
Secondary
return
Fig 4 - Secondary circulation connection