Secondary
return
WRAS approved
pump
Check valve
To Drain
Hot water outlet
Direction
of flow
De-stratification pump
TYPICAL DE-STRATIFICATION
LOOP SYSTEM
Check Valve (not supplied)
Mains water
supply
Expansion
vessel
Balanced cold
water connection
Pressure reducing
valve
Pressure relief
valve
Discharge
pipe
Tundish
SECONDARY
CIRCULATION
To Drain
Direction
of flow
Please note, that these are typical installations and
other options are permissable
Mains water
supply
Expansion
vessel
Balanced cold
water connection
Pressure reducing
valve
Pressure relief
valve
Discharge
pipe
Tundish
Primary Flow and Return
External heat exchanger
(Platet-to-Plate shown)
Not supplied
Secondary Flow and Return
External Heat Source
Thermal cut-out
(must be wired in series
with primary heat source controls
or primary circulation
pump if used)
WRAS approved pump
Notes:
1. Primary heat source must be able to cope with working pressure of cylinder.
2. Secondary flow and return is wholesome water only.
3. There is no internal heat exchanger fitted
to this cylinder range.
Back flow prevention
Device (if fitted)
NOTE:
If a device that prevents
backflow is installed on
the cold water supply to
the PRV then a means of
accommodating expansion
due to local warming of the
pipe is recommended to be
fitted between the Device
and PRV.
Back flow prevention
Device (if fitted)
