3
Rinnai New Zealand
Infi nity Solar 20 & 24 Op / Install: 02-08
Applications
Rinnai continuous fl ow models REU-VE2015WS (Infi nity Solar 20) and REU-
V2422WS (Infi nity Solar 24) are suitable only for installation as gas boosters
in domestic solar hot water systems (see picture below). These models are not
suitable for use as ‘stand alone’ appliances for the purposes of supplying hot
water. These models produce water at higher than normal temperatures and
must be connected to the hot water supply by use of a suitable tempering valve.
Not suitable for use with remote controllers.
Important
For non solar hot water applications Rinnai have a dedicated range of continuous fl ow water
heaters available. Contact Rinnai for more details.
Legionella Disinfection
While any Rinnai Infi nity can be used in solar applications, we strongly recommend the use
of a water heater set to 75
o
C. Water is then tempered back to 55
o
C before use. Please see
the drawing above. This is particularly important where the installation is for older or infi rm
persons, or, it is in a holiday home or other dwelling not constantly occupied.
During winter months, when the heating from the solar collector is not suffi cient to raise the
water temperature in the storage cylinder above 60
o
C for any length of time, there is potential
for the water in the storage cylinder to be set at a temperature which theoretically can be an
ideal environment for Legionella growth.
Should the water in the cylinder be below 60
o
C, heating it to 75
o
C in the Infi nity will effectively
disinfect the water. The temperature needs to be this high because the water only remains at
this temperature for a relatively short time.
If the water comes from the cylinder at more than 60
o
C, it is assumed that it has been at this
temperature for a suffi ciently long time to disinfect the water. In this case the automatic fl ow
diversion valve will cause the water to bypass the Infi nity saving energy.
