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PLUMBING CONNECTION
SUMMER 2015 71
07
WATER PRESSURE
Rheem, Vulcan and Aquamax mains pressure
water heaters are intended for connection to
high or low water pressure supplies subject to the following
conditions:
∫ The maximum supply pressure does not exceed 80%
of the temperature and pressure relief setting. If the
incoming supply pressure does exceed this limit then a
pressure limiting valve is to be fitted on the cold water
supply.
∫ Mains pressure performance cannot be expected
if the incoming water supply pressure is not above
350kpa.
08
LOCATION, LOCATION, LOCATION…
Where a water heater is positioned can often
go a long way towards meeting the customers’
expectations relating to delivery of heated water quickly.
If there is a considerable distance of pipework between
the outlet of the water heater and the kitchen sink it can
often take approximately a second per metre of piping to
transfer heated water from the outlet of the water heater
to the point of use. A satisfactory delivery performance
occurs when the distance equates to the heated water being
delivered quickly.
09
AIR PRESSURE
Balanced air pressure around the balanced
flue terminal will provide reliable, efficient and
consistent operation of a mains pressure gas outdoor water
heater.
10
DEFINE INSTANTANEOUS VS. INSTANT
Define the difference between instantaneous
and instant, especially in the case of a mains
pressure storage water heater being able to supply the same
water pressure that has been connected to the system
compared to a continuous flow system that will continually
heat the water flowing through the unit but will deliver
downstream to the fixtures at a reduced rate of motion.
Be mindful not to leave the customer with the expectation
of ‘instant’ hot water to all fixtures…
John Palfrey is Rheem Australia’s Training Manager.