29
ACCUMULATOR
INCOMING
MAINS WATER
BYPASS VALVE
COLD SUPPLY TO TAPS
THERMOSTATIC MIXING VALVE
Cold water storage
HOT SUPPLY TO TAPS
TPRV - 6 Bar
HEATING PRV
set at 3 Bar
PRV - 6 Bar
c/w INTEGRAL
NON RETURN
VALVE
PRESSURE REDUCING
VALVE set at 3.5 Bar
MAINS PRESSURE
SYSTEM
PRESSURE
SYSTEM PRESSURE
SYSTEM PRESSURE
HEATING SYSTEM PRESSURE
HEATING PRESSURE GAUGE
MAINS PRESSURE
REDUCING VALVE
MOTORIZED
VALVE
DOUBLE CHECK
VALVE
INST
INST
INST
INST
INSTALLA
ALLA
ALLA
ALLA
ALLATION 4
TION 4
TION 4
TION 4
TION 4
4-6
System Pressure
Fig. 4-6a Pressure Diagram - Electrastream Plus
Notes on Pressures:-
1. The Mains Pressure Reducing Valve is not normally required on standard systems
with normal mains pressure, however if the mains pressure is more or fluctuates
above 4 Bar a Mains Pressure Reducing Valve should be considered.
2. The Combination Valve has an integral pressure reducing valve fixed at 3.5 Bar
therefore the System Pressure will be 3.5 Bar maximum.
3. If the Mains Pressure is less than 3.5 Bar then the System Pressure will be at
maximum Mains Pressure.
4. The Combination Valve has a Pressure Relief Valve (PRV) set at 6 Bar.
5. The unvented cylinder has a Temperature and Pressure Relief Valve (TPRV) set at 6
Bar.
6. The heating system has a TPRV set at 3 Bar.
Electrastream only
7. The Accumulator Pressure is factory set at 2 Bar.
8. The recommended Accumulator Pressure is 1.5 Bar below the mains pressure with
an absolute minimum of 0.5/0.8 Bar - see 5-5.2. Consult GAH (HEATING
PRODUCTS) for further information.
44444
Summary of Contents for Electrastream
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