Valves And Fittings - Rinnai Prestige Operation & Installation Manual

InsTallaTIon - all sysTeMs

valves anD fITTIngs

The following valves and fittings are supplied with your solar hot water system:
•
A combined pressure and temperature (PTR) relief valve, capacity 10 kW� Relief valve pressure settings
vary with models. This valve is fitted at the top of the storage cylinder. The PTR valve is a safety device and
it is mandatory that it is fitted by the installer in all installations.
•
Thermo-Arrestor (TA) valve. This valve is fitted on the inlet pipe to the Solar Collectors.
•
For gas boosted systems, elbow connections for the hot, cold and gas supply are fitted at the bottom of the
gas booster�
•
Fittings as shown on pages 30 to 45
The following valves & fittings are to be supplied by the installer:
•
A cold water expansion control valve (ECV). An ECV must be fitted in Western Australia and South Australia
to the cold water supply to the storage cylinder to comply with local regulations� An ECV is recommended
in all other geographical areas where the water supply has a tendency to cause scaling� This will reduce hot
water discharge from the pressure and temperature relief (PTR) valve which minimises wear on this valve�
•
A stop cock, non return valve and line strainer� Combination valves incorporating two or more of these
functions (such as 'Trio' valves) are suitable. These are fitted to the cold water supply to the storage cylinder
by the installer�
•
Cold water supply and hot water discharge pipework to and from the storage cylinder�
•
An isolating valve and connection union for the gas supply to the gas booster�
•
An approved pressure limiting valve (supplied with some systems) is required if the maximum rated water
supply pressure on page 13 is exceeded�
Rinnai 20 CC OIM Issue 9