Rinnai RIN25E24P User manual

25 and 50 Litre Electric Storage Water Heater
Owner’s Manual
Models: RIN25E24P
RIN50E24P
RIN50E36
RIN3699 023334 Rev. A
Specications and materials may change without notice.
Effective for all 25L and 50L electric storage water heaters manufactured and sold after 1st May 2011.
Carefully remove all packaging and
transit protection from the heater before
installation. Dispose of the packaging
responsibly using re-cycling facilities
where they exist.
Installation Details
Owner’s Information

Owner’s Manual
25L and 50L Electric Storage Water Heaters
RIN3699 023334 Rev. A
Installation Details 1
Plumbing Connections 3
Electrical Connection 5
Specications 6
Operating Instructions 7
Safety Information 8
Service Information 9
Troubleshooting 10
Contents

Owner’s Manual
25L and 50L Electric Storage Water Heaters
1
RIN3699 023334 Rev. A
Installation Details
Installation Requirements
This water heater must be installed
by a licensed tradesperson, and in
accordance with
• AS/NZS3500.4.2 “National
Plumbing and Drainage Code Hot
Water Supply Systems – Acceptable
Solutions”.
• AS/NZS3000.
• Local authority regulations.
• Outside Australia and New Zealand,
please refer to local plumbing and
building codes and regulations.
• Notice to Victorian customers from
the Victorian Plumbing Industry
Commission – this water heater
must be installed by a licensed
person as required by the Victorian
Building Act (1993). Only a licensed
person will give you a compliance
certicate, showing that the work
complies with all the relevant
Standards. Only a licensed person
will have insurance protecting their
workmanship for 6 years. Make sure
you use a licensed person to install
this water heater and ask for your
Compliance Certicate.
Water Supply Pressure
This water heater is designed for direct
connection to water supply pressures
of:
25 & 50 Litre Models – 800kPa
Where the mains pressure can exceed
or uctuate beyond the pressure
shown above, a pressure limiting
device (complying with AS1357) must
be tted in the cold water inlet supply.
This device must be installed after
the isolating valve and set below the
pressure shown above. Note during
periods of lower demand water pressure
may increase.
Caution: This water heater delivers
hot water at temperatures exceeding
50°C. Refer to AS/NZS3500 and local
regulations regarding the need for
additional hot water delivery temperature
control.
Pool Heating
This water heater must not be used for
pool heating.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
2RIN3699 023334 Rev. A
Installation Details
Location
The water heater should be located as
close as possible to the most frequently
used hot water outlet. Adequate
access must be made for service to the
element, thermostat, relief valve and
anode. Ensure that the data plate is
clearly visible.
Note: All models are equipped with a
sacricial anode, accessible through the
top cover. Allow 50% of the height of
the water heater for clearance above to
replace the anode.
We recommend a plinth be installed
under the water heater where the
water heater is subjected to wet
conditions.
A properly drained overow tray must
be used where property damage could
occur from water spillage. (See AS/
NZS3500.4.2 for further details.)
When installing this water heater in a
roof area as a mains pressure unit, refer
to local regulations.
Note: The warranty does not cover
damage due to leakage of the water
heater.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
3
RIN3699 023334 Rev. A
Plumbing Connections
Pressure & Temperature Relief
Valve
The Pressure & Temperature Relief Valve
is supplied loose with the water heater.
Please refer to the specications
table on page 6 for the valve ratings.
The PTR valve must be installed directly
into the top socket marked “RELIEF
VALVE”. The drain line from this valve
must run in a continuously downward
direction in a frost-free ambient position
with the discharge end left open to
atmosphere permanently.
The PTR Valve is not intended to enable
connection of the water heater to
supplementary energy sources such as
solar panels or slow combustion stoves
(refer AS/NZS 3500.4 for guidance on
these types of installations).
Open the PTR Valve for approximately
10 seconds by lifting the lever on the
valve to ensure water is relieved to waste
through the relief drain pipe. Lower lever
gently and check that it closes correctly.
The PTR Valve must not be tampered
with or removed. The water heater must
not be operated unless this valve is
tted and in working order.
The PTR Valve should be checked for
adequate performance or replaced at
intervals not exceeding 5 years, or less
in areas where local regulations apply.
Important: The PTR Valve and its
drain outlet pipe must not be sealed or
blocked. It is normal for the PTR valve
to leak a small amount of water during
heating cycles.
Danger
Failure to operate the relief valve easing
lever at least once every six (6) months
may result in a problem with the water
heater and in some cases the tank may
explode.
Warning: A separate drain line must be
run for this relief valve. It is not permitted
to couple drain lines from relief valves
into a single common drain line.
Note: Brass plugs are supplied with
the water heater to plug off the unused
ttings. Ensure that a sealing material is
applied to the plugs to prevent leaking.
Cold Water Connection
An approved isolating valve, non
return valve, line strainer (optional but
recommended), and union must be
tted between the supply main and
either of the RP¾/20 sockets marked
“Inlet” at the bottom of the water heater.
All ttings must be approved by the
relevant Authority. See the diagram on
page 5 for details.
Note for S.A. and W.A.: It is a state
requirement that a pressure relief valve
be tted on the cold water supply line
between the non return valve and the
water heater. See the diagram below for
details.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
4RIN3699 023334 Rev. A
Plumbing Connections
Hot Water Connection
The hot water pipe should be connected
to either of the RP¾/20 sockets marked
OUTLET at the top of the unit. For the
most economical operation of the water
heater, it is recommended that all hot
water lines are insulated. Please check
local regulations regarding the use of
hot water supply pipework that are not
made of copper.
Note: a combined isolating valve/non-return valve/line strainer may be used.
Expansion valve only required where local regulations demand.
Union
Connection
Non-return
Valve
Line
Strainer
Cold Water
Inlet
Drain
Expansion
Valve
Isolating Valve
(Spindle Vertical)
Inlet Connections
Temperature Protection
Water heaters can produce very hot
water. To reduce the risk of scald injury,
it is mandatory under the requirements
of Australian Standard AS/NZS3500.4.2
that a suitably approved temperature
control device be tted to the hot water
supply to outlets used primarily for
personal hygiene. This valve should be
checked at regular intervals to ensure its
operation and settings remain correct.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
5
RIN3699 023334 Rev. A
Electrical Connection
This water heater is designed for
single phase 240V A.C supply only.
The electrical connection must
comply with Local Supply Authority
Regulations and AS/NZS3000.
For models pre-wired with a exible
lead, if the supply cord is damaged, it
must be replaced by the manufacturer,
its service agent, or similarly qualied
person in order to avoid hazard.
For models not pre-wired with a exible
lead, connections are made at the
terminal block inside the water heater,
and a means for disconnection must
be incorporated in accordance with the
wiring rules.
Entry to the connection area is through
the hole beneath the element cover,
designed to accept a 20mm conduit.
The element cover may be removed by
undoing the two screws on the cover
and sliding the cover downwards to
disengage the top edge. Ensure that the
conduit entry is well sealed to achieve
correct weatherproong.
Note: This water heater is tted with
a thermostat and over-temperature
energy cut-out. Under no circumstances
should the water heater be operated
without both these devices being in the
circuit. Replacement must be carried
out only by a qualied electrician or the
manufacturer.
Danger: The operation of the thermal
cut-out indicates a possibly dangerous
situation. Do NOT reset the thermal
cutout until the water heater has been
serviced by a qualied person.
Caution: Water heater must be lled
with water before turning on the
electricity supply.
Electrician: Press the reset button on
thermostat to ensure over-temperature
cut-out is set.
When supply wiring has been connected,
supply wires must be kept lower than the
terminal block.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
6RIN3699 023334 Rev. A
Specifications
Specifications 25L 50L
Storage Capacity (L) 31 53
Hot Water Delivery (L) 25 50
Net Weight Empty (kg) 17 22
Element Sizes (kW) 2.4 2.4, 3.6
Relief Valve:
Pressure (kPa) 1000
Temperature (°C) 99
Power Rating (kW) 10
Country of Origin China
Nominal Dimensions 25L 50L
Total Height (A) 452 694
Total Width (B) 405 405
Outlet Height (C) 297 524
Inlet Height (D) 153 158
Electrical Entry (E) 67 67
A
C
DE
B

Owner’s Manual
25L and 50L Electric Storage Water Heaters
7
RIN3699 023334 Rev. A
Safety
This appliance is not intended for use
by persons (including children) with
reduced physical, sensory or mental
capabilities, or lack of experience and
knowledge, unless they have been given
supervision or instruction concerning
use of the appliance by a person
responsible for their safety.
Children and animals should be
supervised to ensure that they do not
interfere with the appliance.
Filling The Water Heater
Open all hot water taps. Open isolating
valve at the cold water inlet slowly and
allow water heater to ll until water ows
through the system. Close each hot
water tap after the air is expelled from
its line. As noted previously power is not
to be turned on until the water heater is
lled with water.
Water Quality
Your Rinnai water heater has been
manufactured to suit water conditions of
most Australian metropolitan supplies.
Please note that harsh water supplies
can have a detrimental effect on the
water heater and its life expectancy. If
you are unsure about your water quality
you can obtain information from your
local water supply authority.
The water heater is designed for use
in areas where the Total Dissolved
Solids (TDS) content of the water
supply is less than 2500 mg/L. In areas
where the TDS exceeds 600mg/L it
is possible that the magnesium alloy
anode (supplied in the heater) may
become over reactive. To alleviate this,
the magnesium alloy anode should be
replaced with an aluminium alloy anode,
available from your local Rinnai supplier.
Water can also be very corrosive, the
measure of this is the saturation index.
If the water saturation index is greater
than 0.40, an expansion control valve
should be tted. If the index is greater
than 0.80, the water heater installed
should be a Hard Water Model. Please
consult our Service Department for
advice if required.
Caution
If the water heater is left in an operating
condition and unused for two weeks or
more, a quantity of hydrogen (which is
highly ammable) may accumulate in the
top of the water cylinder. To dissipate
this gas safely it is recommended that
a hot tap be turned on for several
minutes at a sink, basin or bath, but not
a dishwasher, clothes washer or other
appliance. During this procedure there
must be no smoking, open ame or
any other electrical appliance operating
nearby. If hydrogen is discharged
through the tap it will probably make an
unusual sound as with air escaping.
Where the water heater is not
installed in accordance with the listed
advice, the water heater will not be
covered by the Terms of Warranty.
Operating Instructions

Owner’s Manual
25L and 50L Electric Storage Water Heaters
8RIN3699 023334 Rev. A
Safety Information
Warning
For safe performance, this water heater
is tted with:
1. Combination Thermostat and over-
temperature energy cut-out.
2. Combination Pressure &
Temperature Relief Valve.
These devices must not be tampered
with or removed.
The water heater must not be operated
unless each of these devices is tted
and in working order. The element(s)
cover should be removed only by an
electrician.
The electrical power supply switch must
be turned off and the fuse removed or
the circuit breaker isolated at the main
electrical supply switchboard before the
water heater electrical cover is removed.
Open the PTR Valve for approximately
10 seconds by lifting the lever on the
valve to ensure water is relieved to waste
through the relief drain pipe. Lower lever
gently and check that it closes correctly.
The PTR Valve must not be tampered
with or removed. The water heater must
not be operated unless this valve is
tted and in working order.
The PTR Valve should be checked for
adequate performance or replaced at
intervals not exceeding 5 years, or less
in areas where local regulations apply.
Important
The PTR Valve and its drain outlet pipe
must not be sealed or blocked. It is
normal for the PTR valve to leak a small
amount of water during heating cycles.
Danger
Failure to operate the relief valve easing
lever at least once every six (6) months
may result in a problem with the water
heater and in some cases the tank may
explode.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
9
RIN3699 023334 Rev. A
Service Information
Six Monthly Service (By Owner)
Operate the Pressure & Temperature
Relief Valve for approximately 10
seconds by operating the easing lever
on the valve to ensure water is relieved
to waste through the relief drain pipe.
Check to ensure the valve closes
correctly.
Five Year Service (By Authorised
Personnel Only)
The ve yearly service should be carried
out by a licensed tradesperson. It is
recommended that this service be
carried out by your local Rinnai agent.
The service should include the following:
• Replace the Pressure &
Temperature Relief Valve.
• Replace the anode. (in areas of
harsh or adverse water conditions
it is recommended that you carry
out a more frequent check of your
anode’s condition, refer Operating
Instructions “Water Quality”)
• Flush the water heater by doing the
following:
i. Turn off the power.
ii. Turn off the cold water supply
to the water heater at the
isolating valve.
iii. Gently operate the easing lever
on the Pressure & Temperature
Relief Valve to release the
pressure in the water heater.
iv. Disconnect the cold water inlet
union to the heater and attach
a drain hose.
v. Gently operate the Pressure
& Temperature Relief Valve to
let air into the heater and allow
water to escape through the
hose.
vi. To ush the heater, carry
out steps (i) to (iv) above.
Disconnect the hot water
inlet union and attach a water
supply hose to the heater. Turn
on the water supply.
vii. Flush the heater until clear
water appears. Reconnect
all ttings, ll the heater and
restore the electricity supply.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
10 RIN3699 023334 Rev. A
Troubleshooting
What Should I Check Before
Making A Service Call?
If there is not enough hot water, it is
recommended that the following points
be considered before making a service
call. If after checking the following points
the problem has not been identied,
please contact Rinnai on 1300 555 545.
No Hot Water
• Is the Pressure & Temperature Relief
Valve discharging too much water?
• Do you have the correct size water
heater for your requirements? Sizing
details are available from your Rinnai
supplier.
• Is one outlet (such as the shower)
using more hot water than you think?
• Carefully review the family's hot
water usage and if necessary
check the shower ow rates with a
bucket, measuring the amount of
water used over that period of time.
If it is not possible to adjust water
usage patterns, an inexpensive ow
control valve can easily be tted to
the shower outlet.
• Consider that during night time
heating, the time taken to heat
the tank can take longer so you
may nd that the tank has not fully
recovered from a period of heavy
usage the previous evening.
• Consider that often the hot water
usage of showers, washing
machines and dishwashers can
be under estimated. Review these
appliances to determine if your
daily usage is greater than the
storage volume of your water
heater. For example, if you have
a 315 litre storage tank and you
are using 450 litres of water it is
possible that there will be certain
times of the day where there is
insufcient hot water. It is also
advisable to inspect tap washers
etc. for leakage and replace if
necessary.
• Is there a leaking hot water pipe or
dripping hot water tap? A small leak
can waste a large quantity of hot
water.
• Replace faulty tap washers and
have your plumber rectify any
leaking pipe work.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
11
RIN3699 023334 Rev. A
Troubleshooting
Water Discharge from the PTR
Valve
Pressure & Temperature Relief Valve
(PTR)
It is normal for the PTR to allow a small
quantity of water to escape during the
heating cycle. The amount of discharge
will depend on hot water usage.
Continuous trickle (PTR)
This is most likely due to a build up of
foreign matter. In this case try gently
raising the easing lever on the Pressure
& Temperature Relief Valve for a few
seconds then release gently. This may
dislodge a small particle of foreign
matter and rectify the fault.
Steady ow (PTR) – more than 20L per
day
This may be caused by excessive water
supply pressure, a faulty Pressure &
Temperature Relief Valve or a faulty
thermostat. Turn off the electricity supply
and contact Rinnai.
High Electricity Bills
• Is the Pressure & Temperature
Relief Valve discharging too much
water?
• Is one outlet (such as the shower)
using more hot water than you
think? See “No Hot Water”.
• Is there a leaking hot water pipe
or dripping hot water tap? A small
leak can waste a large quantity of
hot water.
• Replace faulty tap washers and
have your plumber rectify any
leaking pipework.

Owner’s Manual
25L and 50L Electric Storage Water Heaters
12 RIN3699 023334 Rev. A
Warranty
Terms of Warranty and
Replacement
Guarantee
Effective only for models where the
model number commences with RIN,
for example RIN25E24.
THE RINNAI HOTFLO HOT WATER
UNIT THAT YOU HAVE PURCHASED
COMES WITH A COMPREHENSIVE
1 YEAR PARTS AND LABOUR
WARRANTY AND A GUARANTEE
TO REPLACE YOUR HOT WATER
UNIT IF THE INNER CYLINDER FAILS
WITHIN 5 YEARS.
The terms of the Warranty and
replacement guarantee are set out
below.
Warranty
1. Your hot water unit and its
components are covered by a 1 year
warranty against defective factory
parts or workmanship from the date
your hot water unit is installed. If the
date of installation is unknown, the
warranty commences 1 month after
the date of manufacture (which can
be found on the data plate on the hot
water unit).
2. This warranty is for normal use of the
hot water unit and covers the repair
and/or replacement of any failed
component in the hot water unit or
where necessary, the hot water unit
itself. Under this warranty Rinnai will
repair or replace the component or
hot water unit free of charge (except
for certain transport or travelling
time costs which may be payable
by the owner under clause 9 below).
The decision to repair or replace the
component or hot water unit will be
entirely at the discretion of Rinnai.
3. The warranty only applies to defects
in the hot water unit which have
arisen solely due to faulty materials or
workmanship.
Replacement Guarantee
4. If an inner cylinder fails on a Rinnai
hot water unit within a further 4 years
after the end of the 1 year warranty
period Rinnai will provide a free
replacement hot water unit at the
nearest approved Rinnai agent or
Rinnai ofce to the owner’s home.
Under this replacement guarantee, the
transport, installation and labour costs
of delivering the replacement hot water
unit and removing the existing hot water
unit will be charged to the owner of the
existing hot water unit.
Scope of Warranty and Guarantee
5. The warranty and replacement
guarantee do not apply to any defects
or damage not due to faulty factory
parts or workmanship, including but
not limited to defects or damage
caused by or resulting from:
a. accidental damage, abuse,
misuse, maltreatment, abnormal

Owner’s Manual
25L and 50L Electric Storage Water Heaters
13
RIN3699 023334 Rev. A
Warranty
stress or strain, harsh or adverse
water conditions, contamination
or corrosion from particles in the
water supply, excessive water
pressure or temperature or neglect
of any kind to the hot water unit or
its components.
b. alteration or repair of the hot water
unit other than by an approved
Rinnai agent or a Technician of a
gas or electricity utility approved by
Rinnai.
c. attachment of any parts or
accessories other than those
manufactured or approved by
Rinnai; and
d. faulty or improper installation of the
hot water unit, including installation
other than in accordance with the
instructions contained in the owner’s
manual supplied with the unit.
6. The warranty only applies to the hot
water unit and/or components in the
hot water unit and does not cover
any plumbing or associated parts,
including but not limited to, pressure
limiting valves, stop cocks, non return
valves, electrical switches, pumps
or fuses, supplied by any person
installing the hot water unit.
7. Where a hot water unit or a
component in a hot water unit is
replaced by Rinnai, the balance of
any original warranty or replacement
guarantee period will remain effective.
The replacement part or hot water
unit does not carry any additional
warranty or replacement guarantee.
8. Where the hot water is located
outside the metropolitan area of a
capital city and is:
a. more than 25 kilometres from a
Rinnai ofce; or
b. more than 25 kilometres from a
Rinnai agent,
the owner will be responsible
underthe warranty, for paying the
costs of transporting the hot water
unit or any component in the hot
water unit to and from an approved
Rinnai agent or to a Rinnai ofce
(including the costs of any insurance
associated with that transport) or
paying the travelling time of an
approved Rinnai agent to and from
the owner’s house premises.
9. Where the warranty applies but the
hot water unit is installed or located in
a position that does not comply with
the Rinnai installation instructions or
any relevant statutory requirements,
the owner of the hot water unit will be
responsible for the costs of:
a. the dismantling or removal of
cupboards, doors, walls of special
equipment and
b. any labour required to gain
access to and to bring the unit to
a position that complies with the

Owner’s Manual
25L and 50L Electric Storage Water Heaters
14 RIN3699 023334 Rev. A
installation instructions or relevant
statutory requirements.
10. Rinnai’s obligations under this
warranty and replacement guarantee
are limited to repairing or replacing
the hot water unit or components.
To the extent permitted by law,
Rinnai will not be liable for any loss
or damage to furniture, carpets,
walls, foundations or any other
consequential loss of any kind
caused by a defect in the hot water
unit or any component.
11. Any claim under the warranty or
replacement guarantee must include
full details of the defect and/or
damage to the hot water unit and/
or component in the hot water unit.
All claims must be made within one
month of the detection of the defect.
12. In addition to this warranty and
replacement guarantee, certain
legislation (including the Trade
Practices Act (1974) and consumer
protection legislation of the States
and Territories) gives the owner
certain rights which cannot be
excluded, restricted or modied.
Nothing in this warranty and
replacement guarantee has the
effect of excluding, restricting or
modifying those rights.
13. In the case of a hot water unit
acquired for other than personal
domestic or household use, Rinnai’s
liability for a breach of a condition
or warranty implied by Division 2
of Part V (other than Section 69) of
the Trade Practices Act (1974) and
any equivalent State or Territory
legislation is expressly limited to
any one or more of the following, as
determined by Rinnai:
a. the replacement of the hot water
unit;
b. the repair of the hot water unit;
c. the payment of the cost of
replacing the hot water unit or
of acquiring an equivalent hot
water unit;
d. payment of the cost of having
the hot water unit repaired.
Warranty

Owner’s Manual
25L and 50L Electric Storage Water Heaters
15
RIN3699 023334 Rev. A

Owner’s Manual
25L and 50L Electric Storage Water Heaters
RIN3699 023334 Rev. A
Head Office
10-11 Walker Street,
Braeside, Victoria 3195
P.O. Box 460
Tel: [phone]
Fax: [phone]
National Help Line
Customer Care Centre
Tel: [phone]* Fax: [phone]*
*Cost of a local call higher from mobile or public phones.
Hot Water Service Line
Tel: [phone]
Australia Pty. Ltd. ABN 74 005 138 769
Internet: www.rinnai.com.au E-mail: [email protected]
Rinnai has a Service and Spare Parts network with personnel who are fully trained
and equipped to give the best service on your Rinnai appliance. If your appliance
requires service, please call our Hot Water Service Line.