Rinnai HJ Cooper LCUS00934010 Instructions for use

Low pressure indoor
copper tanks
Owner and installer guide
By
Models: HJ Cooper low pressure copper classic, low pressure copper wetback, and low pressure copper undersink tanks

HJ Cooper tanks shall be installed in accordance with:
- Manufacturer’s installation instructions
- Local regulations and municipal building codes
Installation, servicing and repair shall be carried out only
by authorised personnel.
Not suitable as a spa or swimming pool heater.
Owner, please retain this guide for future reference.
Installer, please leave this guide with the owner.
Warning
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal injury
or loss of life.
Important:
For more information about buying, using, and servicing
of Rinnai appliances call: 0800 RINNAI (0800 746 624)
Rinnai New Zealand Limited
105 Pavilion Drive, Mangere, Auckland
PO Box 53177, Auckland Airport, Auckland 2150
Phone: [phone]
Fax: [phone]
Email: [email protected].nz
Web: www.rinnai.co.nz
www.youtube.com/rinnainz
www.facebook.com/rinnainz

cnt:
About your HJ Cooper tank .......................................4
Troubleshooting.........................................................5
Specification summary...............................................7
Plumbing setup ..........................................................9
Location .....................................................................11
Storage and delivery temperatures............................11
Water quality ..............................................................12
Electrical supply and connections..............................13
Valves and fittings ......................................................14
Commissioning ..........................................................14
Limited warranty ........................................................15

4 | Low pressure indoor copper owner and installer guide: 20733-C 03-13
About your HJ Cooper tank
Water is heated by an electric element located at the base of the tank. The temperature
of the water is controlled by an automatic thermostat that is set by your installer, usually
to 65 °C to disinfect the water for legionella1.
1Legionella is a bacterium that can cause Legionnaires’ disease―a severe form of pneumonia
2 Not applicable for an open vented system connected to a wetback—this uses a standard thermostat (no over-temperature cut-out)
Your system must be installed,
commissioned, and serviced
by an authorised person
in accordance with all the
applicable statutory regulations.
Safety messages
• Element cover
Do not remove the element
cover as this will expose
230 V wiring and must
only be removed by an
authorised person.
• Damagedcomponents
If any component is
damaged, it must be
replaced by an authorised
person using Rinnai
replacement parts.
• Child supervision
Children should be
supervised to ensure they
do not play with any part of
the tank.
• Hot pipe work
Care should be taken not to
touch the pipe work from
the tank as this could be
very hot.
Safety devices
HJ Cooper tanks should have
the following safety devices
fitted.
• Valve vented systems
- pressure reducing valve
- pressure relief valve
- cold water expansion valve
- tempering valve
- energy cut-out thermostat
• Open vented systems
- pressure reducing valve
- tempering valve
- energy cut-out thermostat2
- vent pipe
Do not operate the system
unless all the safety devices are
fitted and are in working order.
It is also important that you do
not tamper or remove any of
these devices.
Valve vented systems have an
energy cut-out thermostat. The
operation of this thermal cut-out
indicates a dangerous situation.
Do not reset the thermal cut-out
until the tank has been serviced
by an authorised person.
Tank thermostat setting
Your tank thermostat has been
set with a temperature setting
to disinfect the water for
legionella. Thermostat settings
must only be adjusted by an
electrician or other suitably
qualified tradesperson.
Draining and filling the system
This normally occurs during
installation or servicing and
must be carried out by an
authorised person.
Turning the tank on and off
If you plan to be away for only a
few nights we suggest you leave
the system switched on. If it is
necessary to switch off the tank
the switch is usually marked and
located in the meter box of the
dwelling. When switching back
on remember that the tank will
take time to heat back up again.
Problems with your tank?
Contact your local plumber. If
the tank is faulty and it is within
the warranty period they will
liaise with us for reimbursement
of costs.

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 5
Troubleshooting
Do not attempt to carry out any work other than that mentioned in this troubleshooting
section. If you have any other faults or problems, please contact your installer, or contact
Rinnai.
Problem Possible solution
Lack of hot water
or no hot water
Isthereelectricitysupplytothetank?
Check that the isolating switch marked ‘hot water’ or ‘water heater’, at the meter
box, is switched on. Also check any isolating switches, near the water heater, are
switched on.
Check the fuse or circuit breaker marked ‘hot water’ or ‘water heater’ at the meter
box. Repeated failure of the fuse or tripping of the circuit breaker indicates a fault,
which must be investigated by an authorised tradesperson.
Most hot water tanks are controlled at peak times by your electricity supplier via a
ripple relay. Contact your electricity supplier to determine if there have been any
issues with the power supply.
Lack of hot water
or no hot water
Areyouusingmorehotwaterthanyouthink?
Often you don’t realise how much water is actually being used. This applies especially
when showering. Typical flow rates for showers is approximately 8-10 litres per
minute. Conduct a simple experiment by placing a measured bucket under your
shower for ten seconds and multiply by six to determine the amount of water
produced over a minute. If your result is significantly more than the rates mentioned
you may want to consider installing a low flow shower rose―available at all good
plumbing stores.
Lack of hot water
or no hot water
Coldwaterreliefvalvedischargingcontinuously?
It is normal for the cold water relief valve to discharge a small quantity of water
through the drain line. If water is discharging continuously there may be a fault with
one of the valves, contact the installer to discuss.
High electricity
bills
If you think your electricity bill is too high, investigate the following:
• Has your electricity tariff changed?
• Is your cold water relief valve discharging continuously?
• Are you using more hot water than normal?
• Has there been any leaking hot water pipes, or taps?

Installation
information

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 7
Specication summary
Inlet Outlet
B
Ø A
½ ” BSP male (9 L, 14 L, 22 L)
¾ ” BSP male (44 L)
Lowpressurecopperundersink
Suitability
• Indoor installations
• Low pressure systems
• Domestic and commercial heating applications
• Top plumbing connections
Not suitable as a pool or spa heater.
Hard or aggressive water will need to be treated in
order to use this product, please test before use.
Construction
• High grade copper inner cylinder
• Galvanised steel outer casing
• CFC-free polyurethane foam insulation
Operating pressures
Maximum inlet pressure = 76 kPa
Maximum working pressure = 76 kPa
Connections
Refer drawing below.
Element
Low watt density nickel plated cop-
per, 1.25 “ BSP boss.
Themostat
7 “ Cotherm probe 20 A over-temperature
thermostat, manually resettable at 85 °C.
Weights (empty/full)
• 9L: 7/16 kg
• 14 L: 8/22 kg
• 22 L: 9/31 kg
• 44 L: 11/55 kg
Tank
size
Tank code A
(mm)
B
(mm)
C
(mm)
Element rating
9 L LCUS00934010 Ø 340 305 120 1 kW
14 L LCUSO1434010 Ø 340 410 120 1 kW
22 L LCUS02234010 Ø 340 575 120 1 kW
44 L LCUS04444515 Ø 445 585 170 1.5 kW

8 | Low pressure indoor copper owner and installer guide: 20733-C 03-13
Ø A
F
B
C
G
E
D
Tank size A B C D
(wetback only)
E F G
(wetback only)
All dimensions are in mm.
44 L Ø 445 585 120 N/A ¾ “ ¾ “ N/A
90 L Ø 430 1115 150 N/A ¾ “ ¾ “ N/A
90 L Ø 500 820 175 N/A ¾ “ ¾ “ N/A
90 L Ø 530 745 175 N/A ¾ “ ¾ “ N/A
135 L Ø 470 1310 180 170 ¾ “ ¾ “ 1 “
135 L Ø 500 1165 175 170 ¾ “ ¾ “ 1 “
135 L Ø 510 1170 175 170 ¾ “ ¾ “ 1 “
135 L Ø 530 1060 175 170 ¾ “ ¾ “ 1 “
135 L Ø 540 1035 200 170 ¾ “ ¾ “ 1 “
135 L Ø 550 980 180 170 ¾ “ ¾ “ 1 “
180 L Ø 510 1500 175 170 ¾ “ ¾ “ 1 “
180 L Ø 530 1370 175 170 ¾ “ ¾ “ 1 “
180 L Ø 540 1320 200 170 ¾ “ ¾ “ 1 “
180 L Ø 550 1265 180 170 ¾ “ ¾ “ 1 “
225 L Ø 550 1540 180 170 ¾ “ ¾ “ 1 “
225 L Ø 600 1330 205 170 ¾ “ ¾ “ 1 “
E = cold inlet F = hot outlet D = centres of the wetback ports G = WBC
Suitability
• Indoor installations
• Low pressure systems
• Domestic and commercial heating applications
• Left, right, or bottom plumbing connections
Not suitable as a pool or spa heater.
Hard or aggressive water will need to be treated in
order to use this product, please test before use.
Construction
• High grade copper inner cylinder
• Galvanised steel outer casing
• CFC-free polyurethane foam insulation
Operating pressures
Maximum inlet pressure = 76 kPa
Maximum working pressure = 76 kPa
Connections
Refer table below.
Element
Low watt density nickel plated cop-
per, 1.25 “ BSP boss.
Thermostat
• Classic tanks
7 “ Cotherm probe 20 A over-
temperature thermostat, manually
resettable at 85 °C.
• Wetback tanks
7 “ Cotherm probe 20 A (no over-temperature)
thermostat
Weights (empty/full)
• 44 L: 11/55 kg
• 90 L: 16/106 kg
• 135 L: 21/156 kg
• 180 L: 26/206 kg
• 225 L: 31/256 kg
Lowpressurecopperclassic,andwetback

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 9
Tanks should be installed in accordance with G12/AS1. For servicing and maintenance,
please allow sufficient room for access to covers and valves.
Plumbing setup
Plumbing setup for a low pressure copper cylinder - valve vented
Hot water to kitchen and laundry
Tempered hot water to bathroom
Isolation and non-return valve
Line strainer
Pressure reducing valve
Drip tray
Expansion control valve and drain Third inlet option
Isolation valve
Pressure relief valve
Tempering valve

10 | Low pressure indoor copper owner and installer guide: 20733-C 03-13
Plumbing setup for a low pressure copper cylinder - open vented
Vent pipe terminating outside building
Hot water to kitchen and laundry
Tempered hot water to bathroom
Line strainer Drip tray
Third inlet option
Roof line
Isolation and non-return valve
Pressure reducing valve
Isolation valve
Tempering valve

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 11
Plumbing setup for a low pressure copper cylinder with a wetback
Vent pipe terminating outside building
Hot water to kitchen and laundry
Isolation and non-return valve
Line strainer
Pressure reducing valve
Drip tray
Roof line
Riser tube
Return pipe
Hot flow pipe
The hot flow pipe from the wetback shall have a minimum slope of 1:20 at any point,
and an average slope of not less than 1:7.
Tempered hot water to bathroom
Isolation valve
Tempering valve

12 | Low pressure indoor copper owner and installer guide: 20733-C 03-13
Location
Base requirements
Tanks should be installed on a flat level base of sufficient strength to support the weight of the water
when full. The water heater must also be suitably restrained against seismic activity, ‘G12/AS1 Figure 14’
details an acceptable method of restraint.
Drip tray
It is important a suitably drained drip tray is fitted where damage could be caused by
discharge from the tank. The Rinnai warranty does not cover any consequential loss
from leaks to the tank.
Access to tank
Tanks should not be located where they will be difficult to remove. Where a tank is not easily accessible
for maintenance and replacement, the Rinnai warranty will not cover any additional costs caused by
access difficulty.
Storage and delivery temperatures
Storage temperature
Local regulation states that hot water shall be stored at a minimum temperature of 60 °C.
Thermostat settings must only be adjusted by an electrician or other suitably qualified tradesperson. The
access cover to the element and thermostat must only be removed by an electrician or other suitably
qualified tradesperson.
Sanitary fixtures delivery temperature
Water temperatures over 55 °C can cause severe scalds. Local regulations must be considered regarding
temperature limitations of hot water supplied to areas used primarily for personal hygiene. The
temperature is limited to 45 °C for early childhood centres, schools, nursing homes or similar facilities
and 55 °C for all other buildings. To comply with these requirements, a temperature limiting device, such
as a tempering or thermostatic mixing valve will be required on all installations.
Water pipes
All hot water pipe work should be insulated with polythene foam or equivalent insulation to optimise
performance and energy efficiency.
Water pipe sizing should be performed in accordance with AS/NZS 3500.4 and/or G12 AS1.
To prevent damage to the water heater when attaching pipe clips or saddles to the jacket, it is
recommended that self drilling screws with a maximum length of 12 mm are used. If drilling is required
take extreme care not to penetrate the inner cylinder. Damage to the inner cylinder is not covered by
warranty.

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 13
Water quality
The water quality of most public supplies, and from bore wells is generally suitable. Refer to the water
quality parameters in the warranty section of this guide for further information.
Pipe sizing and valve selection must be performed to allow for the water supply pressure.
Blue water
Blue water is a result of bio-films being formed which corrode the copper to feed the micro-organisms,
producing copper carbonate and hydroxyis in the water. The major cause is the lack of chlorine in the
water to destroy the microorganisms, but it is also effected by the pH value. In instances of blue water, it
is recommended that expert advice on chlorine control is consulted, and the pH of the water is tested.
The recommended pH scale is between 8.0-8.3.
Pitting corrosion
Pitting corrosion occurs when the protective coating does not form on the interior of the hot water
tank. The main cause of this is the failure to hold the pH at 8.0-8.3 for the period of four months
immediately following the tank installation. Pitting corrosion may also occur, in the form of deposit
attack, if foreign or corrosion products have been allowed to enter the water supply. In the instances of
deposit attack it is recommended filtration experts be consulted.

14 | Low pressure indoor copper owner and installer guide: 20733-C 03-13
Electrical supply and connections
The electrical connection must be carried out by a qualified person in accordance with NZ Electrical
Regulations. The water heater must have the heating element connected to an independent, fused,
AC 230 V 50 Hz power supply with an isolating switch installed at the switch board.
• The water heater must be filled with water prior to connection to the power supply
• Disconnect all power prior to installation and commissioning
• Household wiring to the heater must be capable of withstanding the appliance load
Electrical access is via a hole in the element cover for mounting with an approved electrical conduit
gland. For entry to the element cover remove the two fixing screws.
Connect all PHASE and NEUTRAL wires in accordance with the wiring diagram. Inspect and ensure all
wiring links are secure prior to fixing the access cover and turning the power on.
To ensure the over-temperature and energy cutout is set press the ‘reset’ button on the thermostat (not
applicable for wetback tanks).
Thermostat
Element
AN
Terminal block
2
1
1 Wiring loom main low pressure brown, green/yellow, blue 20080
2 Link wire brown low pressure brown 20081
green/yellow
brown
blue

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 15
Valves and ttings
Valves with pressure ratings other than those listed in this manual must not be used.
Fittings supplied with the tank
Two brass plugs, to plug unused connections, are packaged in a plastic bag inside the element cover,
and a copper riser tube (for wetback tanks) is supplied.
Commissioning
Commissioning and draining activities must be carried out by an authorised person.
To fill and turn on the water heater
1. Open all hot water taps in the house including the shower.
2. Open the cold water isolation valve to the water heater. Air will now be forced out of the taps.
3. Close each tap when water runs freely without air bubbles.
4. Check all plumbing connections and pipe work for water leaks.
5. Switch on the electric power supply.
To turn off the water heater
It may be necessary to turn off a water heater after installation and commissioning, for example during
building activities or if the premises are vacant.
1. Switch off the electricity supply at the isolating switch to the water heater.
2. Close the cold water isolation valve at the inlet to the water heater.
To drain the water heater
1. Turn off the heater, refer above.
2. Open all the hot water taps and then for valve vented (closed) installations, open the union at the
top outlet to allow air into the tank and water to drain (ensuring no damage will occur from the
discharged water).

16 | Low pressure indoor copper owner and installer guide: 20733-C 03-13
Limited Warranty
Component Warranty
Inner cylinder 5 years
All terms of the warranty are effective from the date of
installation. Proof of installation date will be required.
All other parts 1 year
Labour 1 year
Rinnaiwarrantysummarytable
Generalwarrantyterms
Rinnai reserves the right to make modifications and change specifications and its parts without notice.
For the purposes of the Consumer Guarantees Act 1993, Rinnai only guarantees the availability of repair
facilities and spare parts for the express warranty periods recorded in the Rinnai warranty summary
table.
If the tank is being acquired for personal, domestic or household use, this warranty does not limit any
consumer rights or guarantees that may apply under the Consumer Guarantees Act 1993. If the product
is being acquired for the purposes of a business, the provisions of the Consumer Guarantees Act 1993
do not apply and no other warranties (either express or implied by law) apart from those stated in this
warranty apply.

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 17
Warrantytermsandconditions
1. All terms of this warranty are effective from the date of installation. The attending service person
reserves the right to verify this date.
2. All Rinnai appliances must be installed, commissioned, serviced, repaired and removed in
accordance with the manufacturer’s installation instructions, local regulations, and municipal
building codes by persons authorised by local regulations to do so.
3. All appliances must be operated and maintained in accordance with manufacturer’s operating
instructions.
4. The warranty applies only to the components supplied by Rinnai. It does not apply to components
supplied by others, such as, isolating valves, electrical switches, pipe work, electrical cables, fuses,
and where applicable components supplied by others, but not limited to these.
5. Where the appliance has not been sited in accordance with the installation instructions or installed
such that normal service access is difficult, a service charge will apply. If at the discretion of the
attending service person the installation is deemed illegal or access is dangerous, service will be
refused. Any work required to gain reasonable access to the appliance will be chargeable by the
attending service person (for example, removal of cupboards, doors, walls, or the use of special
equipment to move components, but not limited to these).
6. Where a failed component is replaced under warranty, the balance of the original appliance warranty
will remain effective. The replacement part or appliance does not carry a new warranty.
7. Rinnai reserve the right to transfer functional components from defective appliances if they are
suitable.
8. Rinnai reserve the right to have the installed product returned to the factory for inspection.
9. Where the water heater is installed outside the metropolitan area or further than 40 km from a
Rinnai authorised service centre, travel costs shall be the owner’s responsibility.
Warrantyexclusions
The following exclusions may cause the warranty to become void and will result in a service charge and
costs of parts (if required).
1. Accidental damage and acts of God.
2. Failure due to abuse or misuse, improper maintenance or improper storage.
3. Failure due to incorrect or unauthorised installations.
4. Failure or damage caused by alterations, service or repair work carried out by persons other than
those authorised by Rinnai.
5. Where the water heater has failed directly or indirectly as a result of poor water quality outside the
limits specified.
6. Where it is found that there is no fault with the appliance and the issue is related to the installation or
is due to the failure of electric or gas supplies.
7. Subject to any statutory provisions to the contrary, Rinnai does not accept:
a. liability for consequential damage or any incidental expenses resulting from any breach of the
warranty,
b. claims for damage to building or any other consequential loss either directly or indirectly due to
leaks or any other faults.

18 | Low pressure indoor copper owner and installer guide: 20733-C 03-13
Waterquality
Water quality outside the limits (as set down below) will void this warranty. Water quality tests must be
carried out at the customer’s own cost but Rinnai will reimburse any reasonable test costs where water
quality is within the limits tabled.
WaterQualityandImpurityLimits
TDS (Total Dissolved Solids) Total Hardness CaCO3Dissolved (free) CO3pH Langelier Index
Up to 600 mg/L or ppm Up to 200 mg/L or ppm Up to 25 mg/L or ppm 6.5-8.5 Between -1.0-0.8
Most metropolitan water supplies fall within these limits. If you are unsure about water quality, please
contact Rinnai and we will provide you with the details of an authorised agency able to test your water
for compliance to Rinnai standards. If sludge or foreign matter is present in the water supply, a suitable
filter should be incorporated in the water supply.
Some examples of water quality issues where water may need to be treated:
• Hard water (areas including Wanganui)
• Aggressive water (areas including Christchurch)
• Both hard and aggressive water (some bore water)

Low pressure indoor copper owner and installer guide: 20733-C 03-13 | 19
Please keep these details in a safe place for future reference.
ATTACH YOUR PROOF OF
PURCHASE HERE:
RECORD YOUR DETAILS
OF PURCHASE BELOW:
Retailer:
Retailer address:
Date of purchase:
Product details:
Proof of purchase
Installer details
Company name:
Installer name:
Address:
Phone: Mobile:
Signed: Date:

Rinnai.co.nz
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Ø A
F
B
C
G
E
D
20733-C: 03-13