Thermann 25THMS124P User manual

OWNER’S
GUIDE
Electric and Gas Storage Water Heaters
Safety Information
Owner’s Information
Warranty
Models
Electric Storage Water Heaters:
25THMS124P | 25THMS136
50THMS124P | 50THMS136
80THM136 | 125THM118 | 125THM136
160THM124 | 160THM136 | 250THM136
315THM136 | 400THM136
Gas Storage Water Heaters:
135THMB4N | 135THMB4P
170THMB4N
Note – an ‘H’ at the end of the model
number indicates that the water heater
has been pre-fitted with a hard-water
anode (not available in all models).

Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
Specifications and materials may change without notice.
Eective for all Thermann Electric and Gas Storage Water Heaters
manufactured and sold after 1st July 2016.

1
Installation Requirements 2
Safety Information 3
Water Supply and Connection 6
Lighting Gas Water Heaters 7
Filling, Shut Down and Draining 8
System Maintenance 9
Considering a Service Call? 10
Warranty 11
CONTENTS

2
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
INSTALLATION REQUIREMENTS
General:
Your water heater must be installed
by a licensed tradesperson, and in
accordance with:
• AS/NZS 3500.4 Plumbing and
Drainage – Heated Water Services.
• Clause G12 of the NZ Building Code
(in New Zealand).
• AS/NZS 3000 Electrical
Installations (known as the
Australian / New Zealand Wiring
Rules).
• AS/NZS 5601.1 Gas Installations
– General Installations (for gas
storage water heaters).
• Local authority regulations.
• Outside Australia and New Zealand,
please refer to local plumbing and
building codes and regulations.
Failure to comply with these
requirements may aect the warranty.
Note for Victorian Customers:
Your water heater must be installed by
a licensed person as required by the
Victorian Building Act (1993).
Only a licensed person will provide a
compliance certificate, showing that
the work complies with all the relevant
Standards. Only a licensed person
will have insurance protecting their
workmanship.
Make sure you use a licensed person
to install your water heater and ask for
your Compliance Certificate.
Location:
Your water heater should be located
as close as possible to the most
frequently used hot water outlet.
Ensure the compliance plate and
associated warnings are clearly visible.
Your water heater must be accessible
without the use of a ladder or scaold.
Adequate clearance must be available
for service to your water heater. All
models are equipped with a sacrificial
anode, accessed through the top
cover.
Gas storage water heaters must be
installed outdoors. The gas installation
standard specifies minimum clearances
to features such as windows and
doors.
Electric storage water heaters may be
installed indoors. The heated water
services standard requires that a
properly drained safe tray must be
installed where property damage
could occur from water spillage
Note - the warranty will not cover
damage due to leakage of the water
heater if a properly drained safe tray
has not been installed.
Water Heater Support:
Your water heater must be installed
on a flat, solid supporting surface. The
pipework must not be used to support
the water heater.
Pool Heating:
Your water heater must not be used
for pool heating.

3
General:
This water heater 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
water heater by a person responsible
for their safety.
Children and animals should be
supervised to ensure they do not
interfere with the water heater.
DO NOT spray aerosols in the
vicinity of this water heater while it is
in operation.
DO NOT use or store flammable
materials or chemicals in or near this
water heater.
DO NOT modify this water heater.
DO NOT operate this water heater
with any panels or covers removed.
DO NOT place articles on or against
gas storage water heaters.
Relief Valve:
The Pressure & Temperature Relief
(PTR) Valve must be installed directly
into a socket marked “RELIEF VALVE”.
The drain line from this valve must not
be sealed or blocked.
The PTR Valve rating is shown on the
compliance plate. The valve must not
be tampered with or removed. Your
water heater must not be operated
unless this valve is fitted and in
working order.
The PTR Valve should be checked by
a licensed tradesperson for adequate
performance, or replaced at intervals
not exceeding 5 years, or less in areas
where local regulations apply.
The PTR Valve is to be operated
regularly to remove lime deposits and
to verify it is not blocked. It is normal
for the valve to leak a small amount of
water during heating cycles.
Danger:
Failure to operate the PTR Valve
easing lever at least once every six
months may result in the water heater
exploding.
Continuous leakage of water from the
PTR Valve may indicate a problem
with the water heater. This may be
caused by excessive water supply
pressure, a faulty PTR Valve or a faulty
thermostat.
Turn o the water heater and contact
Customer Service on 1300 412 612.
SAFETY INFORMATION

4
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
SAFETY INFORMATION
Temperature Protection:
Water heaters can produce very
hot water. To reduce the risk of
scald injury, it is mandatory that an
approved temperature control device
is fitted to the hot water supply to
outlets used primarily for personal
hygiene. This device should be
checked at regular intervals to ensure
its operation and settings remain
correct.
Not Using Hot Water?
If your water heater is not used for two
weeks or more, a quantity of hydrogen
(which is highly flammable) may
accumulate inside your water heater
tank.
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 flame or any other
electrical appliance operating nearby.
If hydrogen is discharged through
the tap it will probably make a sound
similar to air escaping.
Electric Storage Water Heaters:
Electric storage water heaters are
designed for single phase 240V a.c.
supply only. The electrical connection
must comply with Local Supply
Authority Regulations and
AS/NZS 3000.
Any electrical covers should
be removed only by a licensed
tradesperson, and only after the
electrical supply to the water heater
has been isolated.
In addition to the PTR Valve, electric
storage water heaters are fitted with
a combination thermostat and over-
temperature energy cut-out.
This device must not be tampered
with or removed. Replacement of
this device must only be carried out
by a licensed tradesperson or the
manufacturer.
Your water heater must not be
operated unless this device is fitted
and in working order.
Danger:
The operation of the over-temperature
energy cut-out indicates a possibly
dangerous situation. Do NOT reset the
over-temperature energy cut-out until
the water heater has been serviced by
a licensed tradesperson.

5
SAFETY INFORMATION
Pre-Wired Electric Storage Water
Heaters:
Electric storage water heaters with
the letter “P” at the end of their model
number are factory fitted with a power
supply cord. These water heaters may
be plugged into a standard general
purpose power outlet.
If the power supply cord is damaged, it
must be replaced by the manufacturer,
a service agent or a similarly qualified
person in order to avoid a hazard.
Gas Storage Water Heaters:
In addition to the PTR Valve, gas
storage water heaters are fitted with
a gas control valve. As well as acting
as a thermostat, the gas control valve
is fitted with over temperature energy
cut-outs.
The gas control valve must not be
tampered with or bypassed.
Replacement of the gas control valve
must only be carried out by a licensed
tradesperson or the manufacturer.
Your water heater must not be
operated unless the gas control valve
is fitted and in working order.
Water Heater Appears to be Leaking:
If your water heater is heating a large
quantity of cold water, condensation
may form inside the water heater and
drip down onto the burner.
This is NOT an indication the water
heater is leaking, but is the result of an
ecient gas combustion process.

6
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
WATER SUPPLY & CONNECTION
Water Supply:
Your water heater has been
manufactured to suit the water
conditions of most Australian
metropolitan supplies.
Please note certain water supplies
can have a detrimental eect on your
water heater and its life expectancy. If
you are unsure about the water supply
you can obtain information from your
local water supply authority.
Your 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. The Tank Failure
Warranty does not apply in areas where
the TDS exceeds 2500mg/L.
In areas where the TDS exceeds
600mg/L, it is possible the magnesium
alloy anode (supplied in standard water
heaters) may become over-reactive.
To alleviate this, a hard-water model
is recommended or the magnesium
alloy anode should be replaced with an
aluminium alloy anode. Aluminium alloy
anodes are available from your local
Reece branch.
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 fitted. If the index is greater
than 0.80, the electrical heating element
(fitted to electric storage water heaters)
should be replaced with a low power
density Incoloy heating element.
Please consult Customer Service on
1300 412 612 for advice if required.
Hot Water Connection:
It is recommended that all hot water
pipes are insulated. Hot water pipes
installed outdoors should be insulated
with UV stabilised insulation.
Cold Water Connection:
An approved isolating valve,
non-return valve, line strainer (optional
but recommended) and union must be
fitted between the water supply main
and the water heater.
Water Supply Pressure:
Your water heater is designed for
direct connection to water supply
pressures of up to:
Electric Storage Water Heaters:
- 800 kPa.
Gas Storage Water Heaters:
- 1,120 kPa.
Where the mains pressure can exceed
or fluctuate beyond this pressure, a
pressure reducing valve must be fitted
in the cold water inlet supply.
Note for New Zealand, South Australia
and Western Australia:
It is a requirement in these locations
that an expansion control valve be
fitted on the cold water supply line
between the non-return valve and the
water heater.

7
LIGHTING GAS WATER HEATERS
Caution:
Do not light the water heater until it
has been filled with water (see Filling
the Water Heater on page 8).
Do not attempt to light the water heater
if the pilot is out and the knob is in
the “ON” position (one of the number
settings). Follow the steps below.
Do not look directly into the burner
area. Keep your head above the top of
the access cover opening. Use a mirror
to observe the flame.
Lighting Procedure:
The diagram on page 8 shows the
location of the control knob and the
igniter button on the gas control valve.
1. Remove the access cover. (A copy
of the lighting procedure can also
be found on the inside of the access
cover).
2. Turn the control knob fully
clockwise to the “•” (o) position.
3. Wait five (5) minutes so any build-
up of unburnt gas can escape.
4. Turn the control knob to the
(pilot) position.
5. Depress the control knob fully (until
disappears below housing) and
after thirty (30) seconds, whilst
keeping the control knob depressed,
repeatedly press the igniter button
(for up to 40 seconds) until the pilot
flame ignites.
Note - it is not possible to depress
the control knob fully if the gas
control valve has activated its
safety shuto feature. In this case,
wait sixty (60) seconds for the gas
control valve to reset.
6. Keep the control knob depressed
for twenty (20) seconds after the
pilot flame lights. Use a mirror to
observe the pilot flame. Do not
attempt to observe the flame
directly.
7. Release the control knob and check
the pilot is still alight.
8. If the pilot has failed to light or has
not remained alight, turn the control
knob to “•” (o). Wait five (5)
minutes for the escape of unburnt
gas, then begin again at step 4.
9. When the pilot flame remains alight
with the control knob released,
turn the control knob anticlockwise
to one of the number settings.
A minimum setting of “6” is
recommended and this will give a
water temperature of about 60°C.
10. Turn the control knob to a
higher number for higher water
temperatures.
11. If the main burner does not light
at the selected setting, the water
may already be at the selected
temperature.
12. Replace the access cover and
ensure it is firmly in position.

8
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
FILLING, SHUT DOWN & DRAINING
Filling the Water Heater:
Your water heater must be filled with
water before turning on the electrical
supply or lighting the gas.
1. Open all hot water taps.
2. Open the isolating valve at the cold
water inlet slowly and allow the
water heater to fill until water flows
through the system.
3. Close each hot water tap after the
air is expelled from its line.
4. Open the Pressure & Temperature
Relief Valve for approximately
10seconds by lifting the easing
lever on the valve. Confirm water
drains to waste through the relief
valve drain pipe.
5. Lower the lever gently and check it
closes correctly.
Shutting Down a Gas Storage Water
Heater:
1. Remove the access cover and turn
the control knob to the “•” (o)
position.
2. Turn o the gas isolation valve.
Never turn o the gas supply
without turning the control knob
to the o position first.
3. Turn o the cold water supply
isolation valve.
4. Replace the access cover.
Draining the Water Heater:
1. Turn o the electrical supply to
an electric storage water heater
or shut down a gas storage water
heater.
2. Gently operate the easing lever on
the Pressure & Temperature Relief
(PTR) Valve to release the pressure
in the water heater.
3. Disconnect the cold water inlet
union to the water heater and
attach a drain hose.
4. Gently operate the easing lever
on the PTR Valve to let air into the
water heater and allow water to
escape through the hose.

9
SYSTEM MAINTENANCE
Regular servicing will help to keep
your water heater operating safely and
eciently.
Six Month Service (All Water Heaters):
This service may be carried out by the
owner.
1. Stand clear of the Pressure &
Temperature Relief (PTR) Valve
drain pipe outlet.
2. Open the PTR Valve for
approximately 10 seconds by
lifting the easing lever on the valve.
Confirm water discharges to waste
through the drain pipe.
3. Lower the easing lever gently and
check it closes correctly.
4. Repeat the above process for
the expansion control valve
(if installed).
Other than this, personally inspecting
or servicing any part of your water
heater is not recommended.
Annual Service (Gas Storage Water
Heaters):
This service should only be carried out
by a licensed tradesperson.
The service should include the
following:
• Inspect and flush the PTR Valve
and expansion control valve
(if installed).
• Check the spark gap, gas control
valve and thermocouple.
• Check and if necessary adjust the
main burner pressure.
• Clean and check the main burner
and the pilot light.
Five Year Service (All Water Heaters):
This service should only be carried out
by a licensed tradesperson.
In locations where the water
has Total Dissolved Solids (TDS)
exceeding 600mg/L, this service is
recommended every 3 years.
The service should include the
following:
• Replace the PTR Valve.
• Inspect and flush the expansion
control valve (if installed).
• Replace the anode.
• Drain and flush the water heater.
Gas Storage Water Heaters:
In addition to the items above, the
service should include the items listed
in the Annual Service.

10
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
CONSIDERING A SERVICE CALL?
It is recommended that the following
points be reviewed before making a
service call:
No Hot Water:
• If you have a gas storage water
heater, confirm the gas burner and/
or pilot is on and operating. If not,
see Lighting Gas Water Heaters on
page 7.
• If you have an electric storage water
heater, ensure that the power supply
circuit breaker has not “tripped”.
If your water heater is on a timed
tari such as o-peak, ensure this is
operating correctly.
High Gas or Electricity Bills or
Insucient Hot Water:
• 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 capability of your
water heater.
• If necessary check the shower flow
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 flow control valve can
easily be fitted to the shower outlet.
• Do you have the correct size water
heater for your requirements? Sizing
details are available from your local
Reece branch.
• 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.
• Is the Pressure & Temperature Relief
Valve discharging too much water?
See below.
Continuous Trickle of Water from
Pressure & Temperature Relief (PTR)
Valve:
This is most likely due to a build up of
foreign matter. In this case, try gently
raising the easing lever on the PTR Valve
for a few seconds, then release gently.
This may dislodge a small particle of
foreign matter and rectify the fault.
Water Discharge from PTR Valve:
It is not unusual for a small quantity
of water to discharge during the
heating of water in your storage tank.
The amount of discharge will depend
on hot water usage and size of the
storage tank.
As a guide, it will discharge about 2%
of the volume of the water heated.
Continuous leakage of water from the
PTR Valve may indicate a problem
with the water heater. Turn o or shut
down the water heater and contact
Customer Service.
If after checking the above points,
the problem has not been identified,
please contact Customer Service on
1300 412 612.

11
WARRANTY
Thermann Electric or Gas Storage
Water Heater - Warranty Summary:
Manufactured by Dux Manufacturing
Limited (“Dux”).
All components of the water heater
are covered by a 1 year parts and
labour warranty. The storage tank is
covered for a further 6 years against
failure. See below for details and
conditions.
The benefits provided to you by this
warranty are in addition to any other
rights and remedies available to you
under the Australian Consumer Law.
One Year Parts and Labour Warranty:
Dux warrants against defects in
the water heater arising from faulty
materials or workmanship for a period
of one year. Conditions apply (see
below).
During this period Dux will repair or
replace any failed component or where
necessary, in the absolute discretion
of Dux, replace the water heater, free
of charge including reasonable labour
costs incurred during normal business
working hours.
Seven Year Tank Failure Warranty:
Dux also warrants against failure of the
storage tank for a further period of six
years. Conditions apply (see below).
During this period Dux will provide
a replacement water heater free of
charge. Installation and other labour
costs are the responsibility of the
owner.
Warranty Conditions:
The warranty only applies to the water
heater itself and the components
supplied with the water heater by
Dux. The warranty does not cover
components supplied by others,
including the installer.
The tank failure warranty does not
apply if the water heater has been
connected to a water supply where
the Total Dissolved Solids content is
greater than 2500 mg/L.
These warranties do not apply to
defects that are a result of, without
limitation, the following:
• failure to install the water
heater in accordance with the
installation instructions or statutory
requirements;
• faulty plumbing or water supply
including excessive pressure;
• faulty power or gas supply;
• use of the water heater in a manner
contrary to this manual or other
instructions provided by Dux;
• alterations or repair of the water
heater other than by an accredited
and licensed service agent or
technician;
• accidental damage or abuse.

12
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
WARRANTY
If the water heater is installed in a
position that does not comply with the
installation instructions or statutory
requirements, then this warranty
does not cover major dismantling or
removal of cupboards, doors, walls or
special equipment and/or excessive
labour, at the determination of Dux, to
make the water heater accessible for
repair or replacement.
Commencement of Warranty:
The warranty period commences
from the date of installation of the
water heater. Where proof of the
date of installation is not available,
the warranty period commences
on the date of manufacture of the
water heater. This is shown on the
compliance plate on the outside of the
water heater.
The replacement of the water
heater, or a component of it, under
this warranty does not change the
warranty commencement date.
The original commencement date
continues to apply.
Consequential Losses:
Claims for damage to furniture,
carpets, walls, foundations or any
other consequential loss either directly
or indirectly due to defects of any
kind in the water heater will only be
met by Dux where the damage could
be considered reasonably foreseeable
and the water heater was installed
in accordance with the installation
instructions and all relevant statutory
requirements.
The Australian Consumer Law
(“ACL”):
Our goods come with guarantees
that cannot be excluded under the
Australian Consumer Law. You are
entitled to a replacement or refund for
a major failure and compensation for
any other reasonably foreseeable loss
or damage. You are also entitled to
have the goods repaired or replaced
if the goods fail to be of acceptable
quality and the failure does not
amount to a major failure.
If Dux fails to meet a guarantee under
the ACL, your remedy for such failure
may be limited to any one or more of
the following:
• replacement of the water heater;
• repair of the water heater;
• refunding the cost of the water
heater;
• payment of the reasonable costs of
having the water heater repaired;
• payment in respect of the reduced
value of the water heater.

13
WARRANTY
How to Make a Warranty Claim:
Warranty claims can be placed by
completing the following steps:
• Contact Customer Service on
1300 412 612 (in Australia) or
0800 729 389 (in New Zealand).
• Provide the serial number and
model number of the water
heater. This can be found on the
compliance plate on the outside of
the water heater.
• Provide your full name, address and
contact number.
• Provide proof of date of installation
for warranty to commence
from that date, rather than from
the date of manufacture. See
Commencement of Warranty on
page 12.
Please note, if the defect or fault is not
covered by the warranty or guarantee,
you will be responsible for the costs
incurred by the service agent or
technician.
Contact Details:
Dux Manufacturing Limited
Lackey Road
Moss Vale, NSW, 2577
Australia
1300 412 612 (Australia)
0800 729 389 (New Zealand)
Email: duxaft[email protected]om.au

028044 Rev. C