12
OPERA
OPERA
OPERA
OPERA
OPERATOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
The Dualstream installation has a TPR Valve normally mounted on the cylinder. In the
event of the pressure within the system becoming too high, the TPR Valve will vent.
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.
When pressure is being vented water/steam will be evident at the Tundish and from the
discharge pipe of the Tundish.
Water will normally only discharge when there is an increase in pressure caused by loss
of air pressure in the accumulator.
In the event of water/steam being seen at the discharge pipe or Tundish do the following:-
1.
Turn ON a hot tap to relieve the pressure.
2.
Turn OFF the Electric Immersion Heater.
3.
Turn OFF the Heating System.
4.
Investigate possible cause for high pressure e.g.:-
i
Cylinder Thermostat is set too high.
ii
Restriction in hot water pipework.
iii
Loss of air pressure in the accumulator resulting in no expansion.
5.
Contact the installer before restarting the system.
Fig. 2-5a Tundish
Note
At least the Tundish or discharge pipe
should remain in view, do not box in or
cover up either.
It is recommended the system is inspected by an approved engineer once per year.
The service procedure is included in section 6-1.1.
AIR BREAK
DISCHARGE PIPE
Note
For more information see 4-3
2-5
Expansion Relief
2-6
Servicing
2-7
Protech Anti-corrosion System - 500 only
Fitted to TDI 500 & TDD 500 non stainless steel cylinders only.
The Protech unit is an electronic anti-corrosion protection system which improves the life
of the cylinder.
The Protech unit must be permanently connected to a 240V supply at all times.
The unit has a RED and a GREEN light on the front.
The GREEN light should be on at all times, this indicates proper operation.
When the RED light is on it indicates improper operation which could be:-
1. A short circuit between the electrode and the cylinder.
2. One of the electrodes is not connected.
3. There is no water in the cylinder.
Consult the installer if the RED light is on.
Fig. 2-7a Protech Unit
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