Radiant R2FHG4HW0C Installation instructions

Specications and materials may change without notice.
Effective for Radiant® Heat Pump water heaters manufactured and sold after 1st January 2012.
Installation and Owner’s Manual
Model: R2FHG4HW0C
H4121 025960 Rev. B
For advice, repairs and service, call:
1300 365 115 (Australia)
0800 729 389 (New Zealand)
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
Warranty
This appliance must be installed by a licensed
tradesperson and in accordance with:
• Manufacturer’s instructions
• AS/NZS 3500.4 “National Plumbing &
Drainage Code Hot Water Supply Systems
– Acceptable Solutions”
• Adherence to local authority and OH&S
regulations
• Victorian PIC Requirements

Read This Document First
On completion, sign and leave with owner
Heat Pump Water Heater

Installation and Owner’s Manual – Radiant® Heat Pump
H4121 025960 Rev. B
Welcome To Dux Hot Water 1
Rough-In Diagram 2
Installation Instructions 3
Installation Declaration 12
Owner’s Manual 13
Troubleshooting 18
System Maintenance 20
Safety Information 21
Warranty 22
Other Information 25
Contents
Radiant® is a registered trademark of Dux Manufacturing Limited.
© Dux Manufacturing Limited 2012. All rights reserved.

Installation and Owner’s Manual – Radiant® Heat Pump
1
H4121 025960 Rev. B
Your decision to purchase a Radiant Hot
Water system will reward you for many
years to come.
Since 1915, the Dux range has seen
continuous research and development,
resulting in many breakthroughs in the
efciency, reliability and longevity of hot
water systems.
Radiant water heaters are manufactured
in Australia in a state-of-the-art facility,
using a Quality Endorsed Company
production system.
This is your assurance that you have
purchased the highest quality water
heater available, one that will provide
continuous hot water for all your needs
– safely, economically, and for many
years to come.
To be upfront about it, we want Radiant
to be your brand of choice. So you can
depend on us to provide more than just
a hot water system.
You can rely on Radiant products and
choose them with condence. We’ll
make sure you have the information, the
quality and the innovation you’re looking
for, including the latest energy-saving
alternatives. If you should ever have a
problem – and we’ll bet you won’t –
you’ll nd that we’re easy to get hold of,
friendly to talk to and quick to act. Our
service is all about providing anything
you need as soon as you need it.
Go with Radiant and you’ll have a
dependable, economical, efcient hot
water system designed to perform well,
year after year. And that’s a promise.
Welcome To Dux Hot Water

Installation and Owner’s Manual – Radiant® Heat Pump
2H4121 025960 Rev. B
Rough-In Diagram
100
632
1711
1211
508
195
Hot
Cold
Tempering
Valve
700
150
150
Allow 700 mm clearance
above and 150mm
clearance to either side
of the unit
Allow 50% of the height of the
water heater for clearance
above to replace the anodes
Net weight = 107kg

Installation and Owner’s Manual – Radiant® Heat Pump
3
H4121 025960 Rev. B
Regulatory 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 and only a licensed
person will have insurance protecting
their workmanship for 6 years.
Note: This water heater and
heat pump components are
not suitable for pool heating.
Specications
The net weight of the heat pump is
107kg.
Dimensions are shown in the rough-in
diagram in this manual.
Installation Instructions

Installation and Owner’s Manual – Radiant® Heat Pump
4H4121 025960 Rev. B
Transport and Handling
Critical: When moving the unit,
it must be close to vertical at
all times.
When using a trolley to move
the unit, ensure it is not
tilted more than 45° from the
vertical.
Non-compliance will void
warranty and severely affect
product performance and
operation.

• Arrive at site and conduct a safety
audit.
• Safety audits can also be known as
Work Method Statements (WMS) or
Job Site Analysis (JSA).
• Park your vehicle as close as
allowable to your installation.
• Unload all materials in a safe manner.
• Position all materials in a convenient
position near the work area.
• The existing tank (if applicable)
should be drained and removed in a
responsible manner.
Never tilt unit more than
45˚ from vertical
Installation Instructions
Note: Do not commence
a job where the risks
cannot be controlled.
Note: Do not drain on to
grass or garden beds.

Installation and Owner’s Manual – Radiant® Heat Pump
5
H4121 025960 Rev. B


• The water heater must be installed
outdoors, close to the most
frequently used hot water outlet.
• Optimum installation location is on
the warmest side of house.
• The location must consider noise
impact on living areas. Avoid
positioning near bedrooms or
neighbours’ bedrooms. Although the
running noise level is very low (51
dB(A)) it can be expected that the
heat pump will run during the night.
• Adequate access must be available
to the relief valve and anodes.
• Safely position the new unit on a
level surface in accordance with all
plumbing and building regulations.
• 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.)
Note: The warranty does not
cover consequential damage
due to leakage of the water
heater.
Installation Instructions
Heat Pump
P
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Install a plinth under the
water heater where the
water heater is subjected
to wet conditions

Installation and Owner’s Manual – Radiant® Heat Pump
6H4121 025960 Rev. B
• Allow 200m3 of free space
surrounding the unit. This provides
clear ambient airow assisting the
product’s performance.
• The area must also be clear of debris
such as leaves and tree branches.
• Allow 700 mm clearance above and
150mm clearance to either side of
the unit as shown in the Rough-In
Diagram on page 2.
• Ensure there are no obstructions
placed on top of the unit.
• Total clearance required from ground
to install unit is approximately
2410mm.
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
• Refer to the Rough-In Diagram on
page 2 for detailed information on
position of plumbing.
• An approved isolating valve, non-
return valve, line strainer (optional
but recommended), and union must
be tted between the supply main
and the RP¾/20 socket in the water
heater.
• All ttings must be approved by the
relevant installation Authority.
Installation Instructions
Drain
Union
Connection
Non-return
Valve
Line
Strainer
Cold Water
Inlet
Isolating Valve
(Spindle Vertical)
Cold water expansion
control valve
Note: For S.A. and W.A., it
is a state requirement that
a cold water expansion
control valve be tted on
the cold water supply line
between the non-return
valve and the water heater.

Installation and Owner’s Manual – Radiant® Heat Pump
7
H4121 025960 Rev. B
• This water heater is designed for
direct connection to water supply
pressures of no greater than 800kPa.
• Where the mains pressure can
exceed or uctuate beyond 800kPa,
a pressure limiting device (complying
with AS1357) must be tted.

• Connect the supplied PTR valve
into the top socket marked “RELIEF
VALVE” and discharge according to
plumbing regulations.
• PTR Valves for the unit are rated at
1000kpa.
• The drain line from this valve must
run in a continuously downward
direction with the discharge end left
permanently open to atmosphere.
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.
• 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 3500.4.2 for guidance on these
types of installations)
Installation Instructions

Installation and Owner’s Manual – Radiant® Heat Pump
8H4121 025960 Rev. B

• Connect the cold water pipe to the
storage tank, according to local
regulations and the Plumbing Code.
• The hot water line should be
connected to the hot water outlet.

• A tempering valve is mandatory.
• Ensure it is commissioned correctly.
Incorrect commissioning can lead to
a lack of hot water.
• We recommend using an orange
top Reliance brand tempering valve.

• A condensation drain line is required
to be tted to carry discharge clear
of water heater.
• Condensate drain line should not be
connected to the PTR Valve drain
line but can exit to the same point.

• It is recommended that all hot
water lines are insulated with high
temperature, UV resistant 13mm
closed cell insulation.
Installation Instructions
Hot
Tempered
Cold