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

Failure to flush and add inhibitor to the system
will invalidate the appliance warranty.
3.3 Pipework, Fittings and Outlet / Terminal
Fittings
NOTE: All pipework, fittings and terminal
fittings must be compatible with unvented
systems and have a rated operating pressure
of at least 6 bar. Where plastic pipe / fittings
are being used the rated 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 fittings selected.
The Electromax unvented cylinder can be used
in conjunction with most types of terminal
fittings. It is advantageous in many 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, page 10).
Unvented Cylinder
Temperature /
Pressure Relief
Valve
Tundish
Discharge Pipe
Diagram 5 System Schematic - DHW Cylinder
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
the efficiency of the system will be reduced
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