Thermann 80THMB136 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
80THMB136 | 125THMB118 | 125THMB136
160THMB124 | 160THMB136 | 250THMB136
250THMB236 | 315THMB136 | 315THMB236
315THMB248 | 400THMB136 | 400THMB248
N135THMB118 | N135THMB130
N180THMB124 | N180THMB130
New Zealand only
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).

i
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
IMPORTANT SAFETY INFORMATION
WARNING – THIS APPLIANCE
MAY DELIVER WATER AT HIGH
TEMPERATURE. REFER TO THE
PLUMBING CODE OF AUSTRALIA
(PCA), LOCAL REQUIREMENTS
AND INSTALLATION INSTRUCTIONS
TO DETERMINE IF ADDITIONAL
DELIVERY TEMPERATURE CONTROL
IS REQUIRED.
WARNING – FOR CONTINUED
SAFETY OF THIS APPLIANCE IT
MUST BE INSTALLED, OPERATED
AND MAINTAINED IN ACCORDANCE
WITH THE MANUFACTURER’S
INSTRUCTIONS.
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 should be supervised to
ensure they do not interfere with
the water heater. Ensure animals are
supervised so they do not interfere
with the water heater.
DO NOT SPRAY AEROSOLS IN THE
VICINITY OF THIS APPLIANCE WHILE
IT IS IN OPERATION.
DO NOT USE OR STORE FLAMMABLE
MATERIALS IN OR NEAR THIS
APPLIANCE.
DO NOT PLACE ARTICLES ON OR
AGAINST THIS APPLIANCE.
DO NOT MODIFY THIS APPLIANCE.
DO NOT operate the water heater with
any panels or covers removed.
If the water heater is not used for two
weeks or more, a quantity of hydrogen
(which is highly flammable) may
accumulate inside the 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.
RELIEF VALVE:
The Pressure & Temperature Relief
(PTR) Valve must be installed directly
into the RP½” (DN15) socket marked
“RELIEF VALVE”.
The PTR valve rating is 1,000 kPa and
10 kW on electric water heaters.
The PTR valve rating is 1,400 kPa and
10kW on gas storage water heaters.
The valve must not be tampered with
or removed. The water heater must not
be operated unless this valve is fitted
and in working order.

ii
IMPORTANT SAFETY INFORMATION
The drain line from the PTR Valve
must be installed in a continuously
downward direction in a frost free
environment.
The PTR Valve is to be operated
regularly to remove lime deposits and
to verify it is not blocked. The drain
line fitted to the PTR Valve must be left
open to the atmosphere.
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 VALVE MAY
INDICATE A PROBLEM WITH THE
WATER HEATER.
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.
It is normal for water to drip from the
drain line fitted to the PTR Valve during
heating cycles.
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
(Australia) or 0800 729 389 (New
Zealand).
OVER-TEMPERATURE ENERGY CUT-OUT:
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.
ELECTRICAL SAFETY:
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/NZS 3000 (known as the Wiring
Rules). A means for disconnection must
be incorporated in the fixed wiring in
accordance with the Wiring Rules.
Any electrical covers should be removed
only by a licensed tradesperson, and
only after the electrical supply to the
water heater has been isolated.
When the supply wiring has been
connected, ensure the wires are kept
lower than the terminal block.
Excess wire is not to be looped close to
the thermostat or tank.
In addition to the Pressure &
Temperature Relief 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.

Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
The water heater must not be operated
unless this device is fitted and in
working order.
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.
LIGHTING A GAS WATER HEATER:
Follow the Lighting Procedure steps on
page 3 for lighing the gas water heater.
Important Safety Note:
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
COLD WATER CONNECTION:
The water heater is intended to be
permanently connected to the water
supply main, and not connected by a
hose-set.
Electric water heaters are designed
for direct connection to water supply
pressures of up to 800 kPa.
Gas storage water heaters are designed
for direct connection to water supply
pressures of up to 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.
Instructions explaining how the water
heater can be drained can be found on
page 4.
IMPORTANT SAFETY INFORMATION
iii

iv
INSTALLATION REQUIREMENTS
GENERAL:
This water heater must be installed
by a licensed tradesperson, and in
accordance with:
• In Australia, the Plumbing Code of
Australia (PCA);
• In New Zealand, Clause G12 of the
New Zealand Building Code (NZBC);
• 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); and
• Local authority regulations.
Failure to comply with these
requirements may aect the warranty.
AS/NZS 3500.4 Plumbing and Drainage
– Heated Water Services provides a
Deemed-to-Satisfy Solution for the PCA
and a Verification Method for Clause G12 of
the NZBC. Other methods of compliance
are available. Dux recommends that
installations conform with AS/NZS 3500.4.
NOTE FOR VICTORIAN CUSTOMER:
This 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.
LOCATION:
The 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.
The water heater must be accessible
without the use of a ladder or scaold.
Adequate clearance must be available
for service to the element, thermostat,
relief valve and anode. All models are
equipped with a sacrificial anode, allow
half of the height of the water heater to
provide access through the top cover.
Electric storage water heaters may be
installed indoors. A properly drained safe
tray must be installed where property
damage could occur from water spillage.
Refer to AS/NZS 3500.4 for further
information.
Note - the warranty will not cover
damage due to leakage of the water
heater if a properly drained safe tray has
not been installed.
Refer to local regulations before installing
the water heater in a roof space.
WATER HEATER SUPPORT:
The water heater must be installed on a flat,
solid supporting surface. The pipework must
not be used to support the water heater.
Where the water heater is subjected
to wet conditions, a plinth should be
installed under the water heater.
POOL HEATING:
This water heater must
not be used for
pool heating.
IMPORTANT SAFETY INFORMATION

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 August 2020.

1
Important Safety Information i
Installation Requirements iv
Water Supply and Connection 2
Lighting Gas Water Heaters 3
Filling, Shut Down and Draining 4
System Maintenance 5
Considering a Service Call? 6
Warranty 7
CONTENTS

2
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 (Australia) or
0800 729 389 (New Zealand) 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.

3
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 4).
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.
Important Safety Note:
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 the next page 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.

4
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.

5
SYSTEM MAINTENANCE
Regular servicing will help to extend
the life of the water heater, and keep it
operating safely and eciently.
Your water heater warranty is not
conditional on completing the regular
servicing recommended in this manual.
The conditions applying to your water
heater warranty are set out on page 7
of this manual.
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.

6
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 4.
• 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 (Australia) or
0800 729 389 (New Zealand).

7
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 up to a further 9 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.
Extended Tank Failure Warranty:
Dux also warrants against failure of
the storage tank for a further period
depending on the application and
model:
25 & 50L Electric Storage Tanks
• Six years for single family dwellings.
80 - 400L Electric Storage Tanks
• Nine years for single family dwellings.
Gas Storage Tanks
• Six years for single family dwellings.
All Other Applications
• Two years.
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;

8
Thermann Owner’s Guide
Electric and Gas Storage Water Heaters
WARRANTY
• faulty power or gas supply;
• use of the water heater in a manner
contrary to this manual;
• alterations or repair of the water
heater other than by a suitably
qualified tradesperson;
• accidental damage or abuse.
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.
Where the water heater is located
outside the metropolitan area of a
capital city and is more than 100km
from a Dux oce or service agent,
the Owner will be responsible under
the warranty for paying the costs of
transporting the water heater and or
any component in the water heater to
and from an approved service agent
or Dux oce (including any insurance
associated with that transport),
or paying the travelling time of an
approved service agent to and from
the owners premises.
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.

9
WARRANTY
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.
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 8.
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.

028044 Rev. H