“The beauty of working with Rinnai is
the service they offer. We presented
the project to Rinnai’s Technical Sales
team who came up with the design,
configured the sizes of unit required
and delivered the system complete
and to a very tight timescale – this
was key as the existing water heater
had developed a leak and I was
extremely mindful that the business
had to remain operational to satisfy
local demand. We are very happy
with Rinnai and will be spreading the
word,” adds Ray Gallimore.
Now two HDC1500i internal mounted
water heaters with secondary
circulation provide hot water for 12
commercial machines, plus a sink and
a wash hand basin.
“The Rinnai system has resulted in
an energy reduction and gas saving
due to higher efficiencies and because
we are no longer maintaining large
amounts of stored hot water. It’s not
rocket science to work that out!"
“In terms of gas usage running costs
compared to the old wasteful storage
system, our bills have virtually been
halved since the Rinnai system
went live five months ago which
is absolutely tremendous,” says
Gallimore.
Rinnai’s heavy-duty condensing
range uses two heat exchangers to
capture residual heat from flue gases
to pre-heat incoming water, with
the HDC1500i turning in 105% net
efficiencies*.
These figures add up to considerable
on-going energy savings when
compared with traditional gas fired
stored water systems.
With a Rinnai condensing unit,
temperature is regulated to within
+/-1ºC via ‘smart’ internal controls
without any variation of temperature
at the outlet even when water is
drawn off elsewhere.
All models have full electronic
ignition, no pilot light and operate
on demand only, so there is no gas
consumption when the unit is idle.
The units are easily configured in a
manifold arrangement, ensuring there
will never be a shortfall of instant hot
water whatever the demand.
Rinnai, the UK’s leading manufacturer
of the ErP A-rated Infinity range of
continuous flow condensing gas-
fired water heaters, supplies the best
energy efficient range of low-NoX
water heating units currently on the
market.
Advanced condensing heat
exchangers combined with innovative
burner technology ensures that every
cubic metre of gas is used to the
maximum on HDC 1500i.
Legionella proliferation is answered
by Rinnai: the company has developed
additional ‘SMART’ controls for
secondary return DHW systems in
the form of an advanced temperature
control system which allows for
safe running of water at 42°C core
temperature during the day and 60°C
at a time when the building is closed.
By the time the building reopens, core
temperature is 42°C for safe use.
Another Rinnai innovation addresses
an age-old industry problem with hot
water delivery - lime scale build-
up. The company’s integrated scale
control system is an innovative
solution and comes in the form of an
LC (lime check) code on the display of
the controller.
Almost all water-fed appliances,
including plate heat exchangers,
boilers and water heaters will
accumulate scale deposits when
used within hard water areas over
time. Lime scale consists of calcium
carbonate (calcite) with lesser
amounts of other calcium salts such
as the sulphate. Sometimes lime scale
deposits contain corrosion debris
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and this scale build-up can affect
the water heaters by reducing their
efficiency and overall performance.
Ultimately, ongoing use with hard
water may shorten the lifespan
of conventional water heating
appliances and systems. To safeguard
against this Rinnai units continually
self-monitor for lime scale deposits
around the heat exchanger. If a lime
scale build up has being identified,
a message is sent to the built-in
interface panel on the front of the
appliance. The message is displayed
as ‘LC’, which alerts the end user that
it is time to call a Rinnai service agent
to perform a lime scale flush to clear
the potentially harmful deposits. This
avoids and eliminates the adverse
effects associated with lime scale
build up, including lower energy
efficiencies and rapid product de-
generation.
Rinnai’s HDC range offers condensing
technology with up to 107% gross
efficiency, ultra-low-Nox of less
than 20 ppm, a widely expansive
modulation range of 54kW-4kW
and high flow rates of 37/ltr/min.
Add to these benefits are the peace
of mind of an extended warranty, a
top A-rating exceeding the demands
of eco-labelling legislation, the
flexibility of external wall mounting
and delivery to site with all relevant
accessories and the knowledge that
the HDC range is future-proofed
against future regulatory and
legislative changes.
www.rinnai-uk.co.uk