Expansion Relief Discharge - GAH Electrastream User And Installation Instructions Manual

Note
When opening the stop cock turn the valve
fully open then close ½ turn, this prevents
the valve sticking.
CLOSED
OPEN
Fig. 2-3c Valves
2-4

Expansion Relief Discharge

Note
The Tundish or discharge pipe should
remain visible, do not box in or cover up.
AIR BREAK
DISCHARGE PIPE
Fig. 2-4a Tundish
IMPORTANT Before closing ANY valve, switch OFF the Electrastream
Isolating Switch.
2-3.1 Stop Cock
Normally located at the point where the mains supply enters the dwelling.
Shuts off the mains water supply to the dwelling.
2-3.2 Double Check Valve
Normally located after the Stop Cock. Prevents water backfeeding to main.
Shuts off the mains water supply to the dwelling.
2-3.3 Cold Water Shut Off Valve
Located in the cold feed to the taps/outlets.
Shuts off the cold water to the taps/outlets.
2-3.4 Supply Water Shut Off Valve
Normally located where the cold supply connects to the combination valve on the
cylinder.
Shuts off the cold supply to the Electrastream system.
2-3.5 Hot Water Shut Off Valve
Normally located where the Domestic Hot Water feed comes from the cylinder.
Shuts off the hot water to the taps.
2-3.6 Accumulator Isolating Valve
ELECTRASTREAM PLUS ONLY
Located in the feed from the accumulator. Isolates water in accumulator.
The Electrastream hot water cylinder has a Temperature/Pressure Relief Valve (TPRV); in
the event of the pressure within the cylinder becoming too high, the TPR Valve will vent.
The Cylinder connection for the TPR valve must not be used for any other purpose. The Cylinder connection for the TPR valve must not be used for any other purpose. The Cylinder connection for the TPR valve must not be used for any other purpose.
The Cylinder connection for the TPR valve must not be used for any other purpose. The Cylinder connection for the TPR valve must not be used for any other purpose.
The heating system has its own Pressure Relief Valve (PRV) located adjacent to the
heating expansion vessel; in the event of the pressure within the heating becoming too
high, the PRV will vent.
The combination valve also includes a PRV.
A Tundish will be fitted in the system, this should be located in the same space or
compartment as the hot water cylinder. This device provides an air break when pressure
is being vented from the cylinder TPRV.
The heating system PRV may also be connected to the cylinder Tundish, alternatively it
may have its own.
When pressure is being vented, water/steam will be evident at the Tundish and from the
discharge pipe of the Tundish.
In the event of water/steam being seen at the discharge pipe or Tundish ascertain whether
OPERATOR CONTROLS OPERA OPERA OPERA OPERA TOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS
(If fitted)
2 2 2 2 2
2 2 2 2 2
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