Rinnai DD180 Specification sheet

Rinnai New Zealand Demand Duo Lite Operation/Installation: 11451-A
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DEMAND DUO LITE
(DD180 and DD340)
Operation and Installation Manual
DDLT160E180L, DDLT160E180N, DDLT160E340L and DDLT160E340N
External installations only.
Not suitable or approved as a pool heater.
Appliance must be installed, commissioned and serviced by a licensed tradesperson in
accordance with these instructions and all applicable local rules and regulations.
Customer, please retain this manual for future reference.

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RINNAI LIMITED WARRANTY
Warranty Summary Table and General Warranty Terms
Rinnai Continuous
Flow Water Heater
Demand Duo Lite Tank
Domestic Applications
Heat Exchanger and Tank Parts 10 years pro rata 5 years
Labour 3 years 3 years
All Other Parts (pump, thermostat etc) Parts 3 years 1 year
Labour 3 years 1 year
Commercial Applications
Heat Exchanger and Tank Parts 5 years pro rata 3 years
Labour 3 years 1 year
All Other Parts (pump, thermostat etc) Parts 3 years 1 year
Labour 3 years 1 year
All terms of the warranty are effective from the date of installation of the Rinnai Demand Duo
system. Rinnai New Zealand Limited (Rinnai) reserves the right to verify this date.
Domestic vs. Commercial Application
The reason for distinguishing between a domestic and commercial application is because the
expected life of a system is directly related to the hours of use.
A domestic application is dened as an installation that serves a single residential dwelling
which is not used for commercial purposes, such as a hair salon, catering kitchen, motel or
communal care facility.
All other installations are dened as a commercial application.
General Warranty Terms
Rinnai reserves the right to make modications and change specications 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 Rinnai Demand Duo system 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.

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RINNAI LIMITED WARRANTY
Warranty Terms for Rinnai Continuous Flow Water Heater
Extended Warranty for Rinnai Continuous Flow Water Heater Heat Exchanger
The parts warranty on heat exchangers in a Rinnai continuous ow water heater installed for
domestic use is 10 years pro rata (i.e. in the 4th year, 70% of the value of the part is covered
by the warranty and 40% of the value of the part is covered by warranty in the 7th year).
For Rinnai continuous ow water heater units installed for commercial use the parts warranty
for the heat exchanger is 5 years pro rata (i.e. in the 4th year, 40% of the value of the part is
covered by the warranty and 20% of the value of the part is covered by the warranty in the
5th year).
This warranty is subject to Terms and Conditions below.
All other parts and labour for the Rinnai continuous ow water heater are covered for 3 years
in accordance with the Terms and Conditions below.
Rinnai Continuous Flow Water Heater Warranty - Terms and Conditions
During the warranty period and subject to clauses 2 and 3 below, Rinnai will, at its own
discretion, either replace or repair any defective product at no charge to the customer.
This warranty covers manufacturing defects only. This warranty will not apply (for example)
if the Rinnai continuous ow water heater has been improperly installed or is otherwise
installed contrary to manufacturer’s recommendations, has been damaged during or
after installation, or has been subjected to damage or abuse beyond that expected from
conditions of normal use.
Warranty claims may be invalid if not accompanied by details of the installing or
supervising gas tters registration number and the gas tting certication number.
This warranty commences from the date of installation. Proof of purchase is required at the
time of the warranty claim.
Servicing of the Rinnai continuous ow water heater is to be carried out by a Rinnai
authorised service centre.
Water Quality for Rinnai Continuous Flow Water Heater
Water quality outside the maximum recommended 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 if the product is found to be defective.
Water chemistry and impurity limits are detailed in the table below. Most metropolitan water
supplies fall within these requirements. If you are unsure about water quality, contact your
water authority. If sludge or foreign matter is present in the water supply, a suitable lter
should be incorporated.
Water Quality Limits - Standard Rinnai Continuous Flow Water Heater
TDS (Total
Dissolved
Solids)
Total
Hardness
CaCO3
Alkalinity
(as CaCO3)
Dissolved
(free) CO2
pH Chlorides Magnesium Sodium Iron Langelier
Index
Up to 600mg/litre
or ppm
Up to 200mg/
litre or ppm
Up to
200mg/litre
or ppm
Up to 25mg/
litre or ppm
6.5 to 8.5 Up to
300mg/litre
or ppm
Up to 10mg/
litre or ppm
Up to
150mg/litre
or ppm
Up to
1mg/litre
or ppm
Between
-1.0 and 0.8
Examples of water quality issues where water may need to be treated:
Hard water (Wanganui)
Aggressive water (some areas of Christchurch)
Both hard and aggressive water (some bore water)
1.
2.
3.
4.
5.
•
•
•

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RINNAI LIMITED WARRANTY
Please keep these instructions in a safe place for future reference.
RECORD AND ATTACH YOUR PROOF OF PURCHASE BELOW:
Your Retailer:__________________________________________________
Name:________________________________________________________
Address:______________________________________________________
_____________________________________________________________
Telephone:( _______ ) __________________________________________
Date of Purchase: ______ / ______ / _________
Warranty Terms for Demand Duo Lite Tanks
In Relation to Storage Tanks
The following exclusions apply:
Accessibility - Where the cylinder is not easily accessible for maintenance and replacement,
this warranty will not cover any additional costs caused by access difculty.
Leaks - To the fullest extent permitted by law, this warranty does not cover any
consequential loss resulting from leaks to a cylinder. Accordingly it is important that a
suitably drained catch pan is tted where damage could be caused by discharge from the
cylinder.
•
•

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Contents
WARNING
Improper installation, adjustment, alteration, service or maintenance
can cause property damage, personal injury or loss of life.
For assistance or additional information contact Rinnai on 0800
RINNAI (0800 746 624).
Customer Information
Limited Warranty 2
Introduction 6
For Your Safety 7
Maintenance 8
Servicing 9
Troubleshooting 9
Installation Information
General - Before Installation 10
General - Location 10
Specication 11
Connections 12
Filling and Draining 13
Commissioning 14
Thermostat 14
Pump 15
Customer Contacts 16

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Customer Information - Introduction
This manual has been written to:
Help you understand how your Demand Duo Lite operates
Identify what you need to do to maintain your Demand Duo Lite system
Assist in troubleshooting in the unlikely event a problem occurs
Some facts about your Demand Duo Lite system
•
•
•
How it works The thermostat senses the temperature of the water in the tank, and when
it drops below the set point, the primary pump is activated. This ow starts
the Rinnai continuous ow water heater which returns heated water to the
tank.
Safety devices For safe operation the tank component of your system is tted with a:
Temperature Pressure and Relief (TPR) Valve that ensures the water
remains at a safe pressure and temperature
Automatic tank thermostat to maintain water temperature, do not
adjust the thermostat which is set to 65 °C
It is important that you do not tamper with or remove these devices. In the
case of the TPR valve, do not block or seal the valve or drain pipe.
•
•
Anode The tank is tted with a sacricial anode designed to extend the life of the
tank. It will slowly dissipate protecting the cylinder and should be changed
every 5 years (more frequently in hard/aggressive water areas).
Space should left above the cylinder to allow anode replacement.
Reset timer Your system is equipped with a reset timer to ensure the pump does not
run continuously. This may occur if for some reason the Rinnai continuous
ow water heater does not ignite.
The timer will shut off the pump every 15 minutes for a few seconds to
ensure the continuous ow water heater resets itself.

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Customer Information - For Your Safety
Scald Hazard Hot water can cause scalds
Children, elderly and disabled are the highest at risk of being scalded
Feel the water temperature before bathing or showering
Scalds from hot water taps can result in severe injuries
Scalds can occur when children are exposed directly to hot water when
they are placed into a bath which is too hot
•
•
•
•
•
Hydrogen Gas If the hot water is not used for 2 weeks or more, a quantity of hydrogen
gas which is highly ammable, may accumulate in the storage tank.
To dissipate this safely, it is recommended a hot tap (non electrical) be
turned on for 2 minutes at a sink, basin or bath. During this procedure
there must be no smoking, open ame or any other appliance operating
nearby.
If hydrogen is discharged through the tap, it will make a sound like air
escaping.
Safety Devices
WARNING
Your system is supplied with various safety devices including temperature
sensors, overheat sensors/switches and a Temperature & Pressure Relief
(TPR) valve.
Do Not:
Tamper or remove safety devices
Block or seal the TPR and drain pipe
Operate the system unless all safety devices are tted and in working
order
•
•
•
Legionella
Protection
Your system has been preset with specic temperature settings to disinfect
water for Legionella. Do not adjust these unless instructed by an authorised
person.
Flue Outlet of
Water Heater
Do not touch or insert any objects in the ue outlet.
Keep ammable materials, spray cans, fuel containers, trees, shrubs, pool
chemicals etc clear of the ue outlet.
If ue product discharge causes annoyance, an upwards or sideways ue
diverter can be purchased as an accessory.

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Customer Information - Maintenance
Your Rinnai Demand Duo Lite requires little maintenance, but for maximum performance the
following is recommended.
Temperature &
Pressure Relief
Valve (TPR)
Normally only occurs during installation or servicing and must be carried
out by an authorised person.
Draining and ushing the cylinder on a yearly basis is recommended if
the water supply contains excessive levels of silt.
This valve is located near the top of the tank and is essential for safe
operation. Every 6 months operate the easing gear to ush the valve. As
this will discharge hot water, ensure no one is near the drain line.
It is very important that you raise and lower the easing gear gently.
During this operation, if the valve does not discharge water when the
easing gear is lifted, or does not seal again when closed, attendance by
an authorised person must be arranged immediately.
lift until water ows
from drain line,
lower gently
During servicing the TPR valve needs to be checked and/or replaced.
This needs to be done by an authorised person at intervals not
exceeding 5 years, or more frequently in areas where the water is
classied as hard.
Draining and
ushing of the
cylinder
Inlet water lter should be cleaned regularly.
Rinnai continuous
ow water lter
Storage tanks manufactured from metal can be susceptible to corrosion.
The combined effects of water pressure, temperature and water
chemistry can create an aggressive environment for corrosion of some
materials. For this reason anodes are placed in glass lined tanks so as to
corrode rst. They should be changed every 5 years (more frequently in
hard/aggressive water areas).
Anodes in glass
lined tanks

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Customer Information - Servicing
Rinnai has a service and spare parts network with personnel who are fully trained
and equipped to give the best advice on your Rinnai system. If your Demand Duo
Lite needs servicing, please call Rinnai (0800 746 624) from your land line and select
option 1 for a service centre in your area.
For reliable operation Rinnai recommends regular servicing of the Demand Duo system.
Regular servicing is not covered by the Rinnai warranty.
If any electrical component of the system is damaged, it must be replaced by an authorised
person. These components must be a genuine replacement part available from Rinnai.
Do not attempt to carry out any service work other than mentioned in the troubleshooting
section. If you have any other faults or problems, please refer to your installer or call Rinnai.
Customer Information - Troubleshooting
Lack of hot water or no hot water
Is there electricity
to the system?
Check isolating switches and electrical connections to ensure everything
is turned on.
Check the fuse or circuit breakers at the meter box. Repeated failure
of a fuse or tripping of a circuit breaker indicates a fault which must be
investigated by a licensed tradesperson.
Cold Water Relief
Valve discharging
continuously?
It’s 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 your installer to
discuss.
High electricity/gas bills
If you think your electricity/gas bill is too high, investigate the following:
There may have been a change to your tariffs since your last bill
Cold Water Relief Valve is discharging continuously, refer above
You may be using more hot water than you think
There may be hot water pipe/tap leakages, check with your local plumber
The tank thermostat may not be set to 65 °C
•
•
•
•
•
Is the gas on? If the gas supply has been interrupted the water heater will display er-
ror code 11 or 12. Turn off the power to the system, wait 10 seconds
before turning on again.

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Installation Information - General
Before installation
Unpack the appliance and components and check for damage. DO NOT install any
damaged items.
Check all components have been supplied and that you have the correct gas type.
Read these instructions to get an overview of the steps required before starting the
installation. Failure to follow these instructions could cause a malfunction of the system.
This could result in serious injury and property damage.
The cylinder should be installed to AS/NZS3500.4, with reference to G12/AS1 where
appropriate.
Base requirements
Access to system
Catch pan
Flue clearance
Electricity
The cylinder should be installed on a at level base of sufcient
strength to support the weight of the water heater when full. It must
also be restrained against seismic activity.
The Demand Duo Lite system should not be located where it will
be difcult to remove. Where a system is not easily accessible for
maintenance and replacement, the Rinnai Warranty will not cover any
additional costs caused by access difculty.
It’s important a suitably drained catch pan is tted where damage
could be caused by discharge from the cylinder.
This is a power ued appliance and ue clearances must comply
with NZS:5261, “Table 16 - Minimum clearances required for ue
terminals”.
A single 10 amp outdoor power point is required adjacent to the
installation.
Location

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DD180 LITE DD340 LITE
CONNECTIONS
- Gas Supply
- Cold Water Inlet
- Hot Water Outlet
20 mm
20 mm
20 mm
DELIVERY1 (litres)
- 1st Hour at 40 °C
- 1st Hour at 55 °C
1019, 947, 837
719, 652, 545
1411, 1247, 1117
952, 870, 978
DIMENSIONS (mm)
A. Overall Height
B. Overall Width
C. Overall Depth
D. Height to Hot Outlets
E. Height to Cold Inlets
1510
590
730
1310
225
1530
760
800
1200
260
Efciency 81% (thermal efciency of Rinnai continuous ow water heater)
Input 160 MJ/h or 44 kW (max)
Pump Grundfos UPS 20-60 B 150
Recovery at 50 ° Rise 36 minutes (approx.) 67 minutes (approx.)
Storage Capacity 180 litres 340 litres
Tank Construction high quality glass lined inner, sturdy corrosion resistant outer and high density
expanded polyurethane foam insulation
TPR Setting 1000 kPa 850 kPa
Thermostat preset to 65 °C
WEIGHT - Empty/Full (kg) 100 and 280 142 and 482
1Based on incoming water temperatures of 15, 10 and 5 °C
Installation Information - Specication

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Installation Information - Connections
Cold water inlet DD180 20 mm tting on right side of tank, 225 mm above the
ground
DD340 20 mm tting on right side of tank, 260 mm above the
ground
For ease of draining it’s advisable to t a “Tee” piece with a capped valve
or drain line between the cold water isolation valve and cold water inlet
connection of the tank.
•
•
Hot water outlet DD180 20 mm tting on left or right hand side of tank, 1310 mm
above the ground
DD340 20 mm tting on left or right hand side of tank, 1200 mm
above the ground
Ensure adequate insulation/lagging is tted to hot water pipe to minimise
heat loss. Pipe sizing must be sized to allow sufcient water ow to hot
water xtures.
•
•
Pressure
Limiting Valve
DD180 700 kPa (approx.)
DD340 500 kPa (approx.)
•
•
Cold Water
Pressure Relief
Valve
DD180 850 kPa (approx.)
DD340 700 kPa (approx.)
•
•
TPR Valve
(supplied)
DD180 1000 kPa
DD340 850 kPa
•
•
Drain Valve Provision must be made to drain the cylinder if required for servicing.
Drain Lines These must be installed in accordance with AS3500 and/or G12/AS1.
G12 is available online from:
www.dbh.govt.nz/building-code-compliance-documents
Maximum
thermostat
setting
The tank thermostat is factory set to shut off at 65 °C. The Rinnai
continuous ow water heater is set to 75 °C. No adjustment should be
made to these settings.
Ingress
protection rating
IPX4 (cylinder, control box and Rinnai continuous ow water heater)
A TPR valve must not be replaced with one that has a higher pressure/kW
rating than that specied for your system.

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Flush cold water inlet pipe to remove any debris before nal connection to cold water inlet
on cylinder.
Turn on hot water tap at kitchen sink or similar to allow air to be expelled while cylinder is
lling with cold water.
Slowly open cold water isolation valve on cold water supply pipe.
Allow cylinder to ll. Turn off hot water tap once non-aerated water ows through hot water
tap.
Check all connections for water leakage, tighten as required.
Prime circulating pump on start up, refer page 15 for extract from Grundfos Instructions on
how to do this.
The thermostat on the cylinder is set to 65 °C and the Rinnai continuous ow water heater
is set to 75 °C. If the cylinder thermostat does not appear to be set correctly, refer to
procedure on next page.
If hotter water is required both the cylinder thermostat and Rinnai continuous ow water
heater, dip switches must be adjusted. Ensure Rinnai continuous ow water heater is set at
least 10 °C hotter than the cylinder thermostat cut out temperature.
Plug 3 core flex into suitably earthed general purpose socket outlet. Turn on power supply.
Pump should start and the Rinnai continuous flow water heater should ignite.
Loosen bleed screw on pump. The Rinnai continuous flow water heater will continue
to operate until the thermostat is satisfied water temperature is up to 65 °C. When
temperature has been reached thermostat will turn off the primary circulating pump.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Important
Do not plug in the water heater until the cylinder is completely full of water
Please read these instructions carefully as failure to follow this procedure will
void any warranty
Thermostat is factory set and should not be reset
•
•
•
Installation Information - Draining
Isolate power supply to the Demand Duo system.
Close cold water isolation valve.
Open hot water tap to relieve pressure.
Remove cap on cold water drain valve if no drain line tted.
Connect hose or similar to allow water to drain to a safe location.
Open cold water drain valve and allow water to drain from system.
1.
2.
3.
4.
5.
6.
Installation Information - Filling

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Installation Information - Commissioning
Fill tank as detailed on previous page and commission the Rinnai continuous ow water heater
in accordance with the commissioning check sheet attached to the front cover of the unit.
Installation Information - Thermostat
To ensure the over-temperature and energy cutout is set, press the ‘reset’ button on the
thermostat.
Thermostat
setting
The thermostat must be set to 65 °C. Turning the adjustment knob
clockwise decreases the temperature setting and turning it clockwise
increases the temperature setting.
Rinnai advise that the thermostat must only be adjusted or removed by
an electrician or other suitably qualied tradesperson.
Reset timer will shut off the pump every 15 minutes for a few seconds.

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Installation Information - Pump
Prime circulating pump on start up
The following extract has been taken from page 12 of the Grundfos Instructions UP, UPS, UPD,
UPSD, version 50 41 10 0802 - 104.

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Consumers: 0800 RINNAI (746 624)
Installers: 0800 TO RINNAI (86 746 624)
Address: 105 Pavilion Drive, Airport Oaks, Mangere, Manukau
PO Box 53177, Auckland Airport, Manukau 2150
Phone: [phone]
Fax: [phone]
Email: [email protected]
Websites: www.rinnai.co.nz and www.rinnai-tradesmart.co.nz