Specifications

Megaflo He

3.5 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).

3.6 OUTLET PIPEWORK

Ideally the pipework from the Premier Plus 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.

3.7 SECONDARY CIRCULATION

If a secondary circulation system is required it is recommended that it be connected to the

Premier Plus as shown in Diagram 4 via the tee joint supplied. This is supplied capped off, the

cap must be removed before connection. Care must be taken if using a solder tting to protect

the plastic coated surface of the Premier Plus SystemFit casing. 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 additional expansion volume to the system by

tting an external potable water expansion vessel to the secondary circuit. This should be done

if the capacity of the secondary circuit exceeds 10 litres.

Pipe capacities (copper)

15mm o/d = 0.13 litres per metre run (10 litres = 77m)

22mm o/d = 0.38 litres per metre run (10 litres = 26m)

28mm o/d = 0.55 litres per metre run (10 litres = 18m)

3.8 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 Premier Plus 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.