Pipework, Fittings And Outlet/Terminal Fittings; Treatment Of The Primary (Central Heating) Circulating System - Heatrae Sadia ElectroMax Installation & Servicing Instructions Manual

3.3 Pipework, Fittings and Outlet / Terminal
Fittings
systems and have a rated operating
pressure of at least 6 bar. Where plastic
pressure must be achievable at outlet
temperatures that can be expected within
the hot water distribution pipework. If in
doubt, consult the manufacturer of the
The Electromax unvented cylinder can
be used in conjunction with most types of
mixer showers or taps to have balanced
pressure hot and cold water supplies, in
these instances the balanced cold water
supply should be teed off the supply to the
Electromax immediately after the Cold Water
Combination Valve (see diagram 5).
Unvented Cylinder
Temperature /
Pressure Relief
Valve
Tundish
Discharge Pipe
Diagram 5 System Schematic - DHW Cylinder
10 Installation & Servicing Instructions
Branches to cold outlets where drinking
water may be drawn should be taken
directly from the main supply before the
Cold Water Combination Valve to avoid
the possibility of warm expanded water
being drawn from cold taps.
3.4 Treatment of the Primary (Central
Heating) Circulating System
Primary water circulating systems will be
subject to corrosion unless an appropriate
water treatment is applied. Without treatment
over time as corrosion sludge accumulates
within the system, risking damage to the pump
and valves, system noise and circulation
problems.
Expansion Valve
Cylinder Drain
Discharge
Electromax Housing
Unvented System
Primary System
Cold Balanced
Draw Off (to
Mixer Outlets) Cold Draw Off
Expansion
Vessel
Isolating
Valve
Cold Water
Combination
Valve
(to Drinking
Water Outlets)
Cold Water
Mains Supply