iHeat Operation Guide: 12063-A 01-13
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General information
Before operation please read these instructions to get an overview of how to operate, maintain
and service your Rinnai iHeat system.
Electrical connection
The iHeat air handler
unit is supplied with
a 1.5 m power cord
and 3-pin plug. The
standard electrical
connection is to the side of the
unit. This must be plugged into an
earthed power point.
The electrical cord should not
come into contact with the air
handler unit. If the supply cord
is damaged, it must be replaced
by a licensed tradesperson. This
must be a genuine replacement
part available from Rinnai—part
number 12019.
Rinnai water controllers
If you have existing
Rinnai water
controllers these
will need to be
disconnected as
these will not work with the Rinnai
iHeat system. This is because the
preset temperature of your Rinnai
Infinity needs to be raised from 55
°C to ≥ 60 °C, to get sufficient heat
output for your central heating
system, and to operate the biosafe
operation.
Gas and/or electricity failure
during operation
If the power and/or gas is
disrupted during operation the
central heating system will stop
operating, but the thermostat
will still indicate the system is on
due to the battery backup. Once
the power and/or gas is restored
the system will return to normal
operation without you having to
do anything.
If normal operation does
not resume refer to the
Troubleshooting section in this
guide.
Keeping the power on to the
iHeat on at all times
It is critical that power to the iHeat
unit is left on at all times. This is
required to enable the automatic
frost protection and biosafe
operations.
Biosafe operation
This operation occurs if the iHeat
has not been used in seven days
(i.e. during summer).
Power is required to run the
biosafe operation, which runs the
pump for two minutes every week
(after a week of inactivity) to kill
any bugs in the water.
The timing of this operation will
depend on when the unit was
connected to power. For example,
if this occurred at 4pm, the biosafe
operation will operate at 4pm.
If you experience a power cut in
the middle of the night the biosafe
operation will revert to the time
that the power was restored. If
this is a nuisance (due to noise),
disconnect the power to the iHeat
at a suitable time to reset the
biosafe operation.
Frost protection
Frost protection is fitted
on your iHeat unit as
well as on all current
Rinnai Infinity VT, HD,
and EF models. Frost protection
operates automatically, as
required, whenever the appliance
is connected to the electric power
supply. For the iHeat unit, it will
activate when temperatures fall
below 2 °C, and for Rinnai Infinity
models (with frost protection),
when the temperature inside the
units falls below 3.5 °C.
If power has failed and there is risk
of damage from frost, turn off the
gas supply to the Rinnai Infinity
unit and open a tap slightly to
allow water flow through the unit.
This may prevent damage from
freezing.
If the iHeat and Infinity are not
going to be used for an extended
period, and the electric power
supply is disconnected, turn off
the water and gas supplies and
arrange for your plumber to drain
all the water from the iHeat unit
and the Rinnai Infinity to prevent
frost damage. This is important
as frost damage is not covered by
warranty.
Typical modes of operation
The four common modes of iHeat
operation will be:
Cooler months
-
System is on heat with the fan
on auto—runs on timers and is
on all the time.
-
System is in manual mode—no
timers are set and the system
is manually turned on and off
via the thermostat.
Warmer months
-
Thermostat is set to ‘heat off’,
or
-
Thermostat is set to ‘heat
off’, but the fan is set to
continuously run on lo, med,
or hi to circulate air through
the house—this will need to
be done manually each time
(p. 9).
