Rinnai EVT20A User manual

Evacuated Tube Commercial Solar Pre-Heat Systems
Operation & Installation Manual

Rinnai 2 EVT DD Solar Pre Heat System Operation and Installation Manual
This appliance must be installed in accordance with:
• Manufacturer’s Installation Instructions
• Current AS/NZS 3000, AS/NZS 3500 & AS/NZS 5601
• Plumbing Code of Australia (PCA)
• Local Regulations and Municipal Building Codes including local OH&S
requirements
The solar hot and cold pipes between the solar storage tank and the solar collector(s)
must be suited to the high water temperatures and pressures that may occur. Fittings
used to join these pipes must use metallic materials to achieve sealing. Plastic pipe
and fittings must not be used as they are not suitable for the high temperatures and
pressures that may occur.
Failure of plastic pipe and/or fittings can lead to the release of high temperature water
and cause severe flooding and water damage.
This appliance must be installed, maintained and removed by an Authorised Person.
For continued safety of this appliance it must be installed and maintained in accor-
dance with the manufacturer’s instructions.
Not suitable as a pool or spa heater
AS/NZS 2712
Lic No.1849
SAI Global
Congratulations on the purchase of your Rinnai Solar Hot Water System. We trust you will have many years of
comfort and enjoyment from your system.
IMPORTANT
BEFORE USING THIS APPLIANCE
Before proceeding with the operation or installation read this manual thoroughly and gain a full
understanding of the appliance, to ensure safe and correct use.

Rinnai 3 EVT DD Solar Pre Heat System Operation and Installation Manual
TABLE OF CONTENTS
Warnings and Important Information 4
Safety and Regulatory Information ..................................................................................................................... 4
Scald Hazards .................................................................................................................................................... 5
Safety Devices ................................................................................................................................................... 6
Excessive Discharge from Safety Devices ......................................................................................................... 6
Hydrogen Gas .................................................................................................................................................... 7
Water Temperature ............................................................................................................................................. 7
Water Quality ...................................................................................................................................................... 7
Draining and Filling the Water Heating System .................................................................................................. 7
Maintenance and Regular Care ......................................................................................................................... 7
Servicing and Repair .......................................................................................................................................... 7
Installation 8
Regulations and Occupation Health and Safety (OH&S) .................................................................................. 8
Location - General Information ........................................................................................................................... 8
Hi Rise Kits in Conjunction with Split System Flat Roof Frames ........................................................................ 8
Storage Cylinder Location .................................................................................................................................. 8
Water Pipes ........................................................................................................................................................ 9
Water Supply ...................................................................................................................................................... 9
Hot Water Delivery Temperature ........................................................................................................................ 9
Valves and Fittings ............................................................................................................................................. 9
Installation Procedure ....................................................................................................................................... 10
Installation - Evacuated Tubes 12
Regulations and Occupation Health and Safety (OH&S) ................................................................................ 12
Specications ................................................................................................................................................... 12
System Orientation and Inclination ................................................................................................................... 14
Pipe And Pump Sizing ...................................................................................................................................... 14
Components ..................................................................................................................................................... 15
Assembly Instructions ..................................................................................................................................... 18
Installation on a Pitched Metal Roof ................................................................................................................. 20
Joining Two Collectors ..................................................................................................................................... 24
Plumbing Connections and Temperature Sensor ............................................................................................. 24
Flow and Return Line Layout ........................................................................................................................... 25
Collector Spacing Requirements ..................................................................................................................... 25
Storage Cylinders 26
Specications ................................................................................................................................................... 26
Components Supplied With Cylinders .............................................................................................................. 26
Dimensions ...................................................................................................................................................... 27
Pump and Controller 29
Components Supplied in Solar Controller Kits ................................................................................................. 29
Solar Controller ................................................................................................................................................ 30
Gas Boosting 31
Solar Preheat with Manifold Pack .................................................................................................................... 31
Solar Preheat With Demand Duo ..................................................................................................................... 32
Solar Preheat with Demand Duo and Warm Water Valve ................................................................................ 33
Save a Service Call 34
Contacts 36

Rinnai 4 EVT DD Solar Pre Heat System Operation and Installation Manual
SAFETY AND REGULATORY INFORMATION
WARNING
DO NOT operate this system before reading the manufacturers instructions.
This appliance must be installed, commissioned and serviced by an authorised person in
accordance with all applicable local rules and regulations.
Access covers of water heating system components will expose 240V wiring and MUST be
removed by an authorised person.
This appliance 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 appliance by a person responsible for
their safety.
For continued safety of this appliance it must be installed, operated and maintained in accordance
with the manufacturer’s instructions.
Children should be supervised to ensure they DO NOT play with the appliance.
Any power leads from the water heater system components MUST be plugged into an external
weatherproof electrical outlet. If the power supply cord of any water heating components is
damaged, it MUST be replaced by an authorised person in order to avoid a hazard, using genuine
replacement parts available from Rinnai. Take care not to touch the power plugs with wet hands.
Care should be taken not to touch the pipe work as it may be HOT! The pipes between the
solar collectors and storage cylinder MUST be copper or alternative material pipes that may be
supplied by Rinnai. Plastic pipe is NOT suited to the water temperatures and pressures that may
occur in the system.
DO NOT place articles on or against this appliance.
DO NOT store chemicals or ammable materials near this appliance.
DO NOT operate with collectors or covers removed from this appliance.
DO NOT activate pump unless cylinder is full of water.
NEVER use a ammable spray such as hair spray, lacquer, paint, etc near this unit as this may
cause a re.
WARNINGS AND IMPORTANT INFORMATION

Rinnai 5 EVT DD Solar Pre Heat System Operation and Installation Manual
SCALD HAZARDS
HOT WATER CAN CAUSE SCALDS.
CHILDREN, DISABLED, ELDERLY AND THE INFIRM ARE AT THE HIGHEST RISK OF BEING SCALDED.
FEEL WATER TEMPERATURE BEFORE BATHING OR SHOWERING.
SCALDS FROM HOT WATER TAPS CAN RESULT IN SEVERE INJURIES TO YOUNG CHILDREN.
SCALDS OCCUR WHEN CHILDREN ARE EXPOSED DIRECTLY TO HOT WATER WHEN THEY ARE
PLACED INTO A BATH WHICH IS TOO HOT.
ALWAYS......
Test the temperature of the water with your elbow before placing your child in the bath, also carefully
feel water before bathing or showering yourself.
Supervise children whenever they are in the bathroom.
Make sure that the hot water tap is turned off tightly.
CONSIDER.....
Installing child proof tap covers or child resistant taps (both approaches will prevent a small hand being
able to turn on the tap).
Installing tempering valves or thermostatic mixing valves which reduce the hot water temperature
delivered to the taps. Your local plumbing authority may already require that these be tted. Contact
your installer or local plumbing authority if in doubt.
NEVER….
Leave a toddler in the care of another child. They may not understand the need to have the water
temperature set at a safe level.
WARNINGS AND IMPORTANT INFORMATION

Rinnai 6 EVT DD Solar Pre Heat System Operation and Installation Manual
SAFETY DEVICES
The water heating system is supplied with various safety devices including temperature sensors, overheat sensors
and switches and a Pressure & Temperature Relief (PTR) valve. These devices must not be tampered with or
removed. The water heating system must not be operated unless each of these devices is tted and is in working
order.
WARNING
DO NOT tamper with or remove safety devices.
DO NOT operate the water heater unless all safety devices are tted and in working order.
DO NOT block or seal the PTR Valve and drain pipe.
Pressure & Temperature Relief (PTR) Valve
This valve is located near the top of the water heater
and is essential for safe operation. It is normal for the
valve to release a small quantity of water through the
drain line during heating.
However, continuous leakage of water from the valve
and its drain line may indicate a problem with the
water heater. Tw is t c ap until w ater
flow s from d rain lin e
Lift le ve r u ntil w ater
flow s from d rain lin e
(Low er lev er gen tly!)
WARNING
NEVER block the outlet of the PTR valve or it’s drain line for any reason. The easing gear must
be operated at least every 6 months to remove lime deposits and verify that it is not blocked.
Failure to do this may result in the water heater failing.
If the valve does not discharge water when the easing gear lever is opened, or does not seal again
when the easing gear is closed, attendance by an authorised person must be arranged without
delay. The PTR valve is not serviceable.
EXCESSIVE DISCHARGE FROM SAFETY DEVICES
Pressure & Temperature Relief (PTR) Valve
It is normal and desirable that this valve allows a small quantity of water to be discharged during the heating cycle.
If it discharges more than a bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve dribbles continuously, try easing the valve gear for a few seconds as described above. This may
dislodge any foreign matter and alleviate the problem.
If the valve discharges at high ows, especially at night, it may be as a result of the water pressure exceeding the
design pressure of the water heater. Ask your installer to t a Pressure Limiting Valve (PLV).
WARNING
NEVER replace the PTR valve with one which has a higher pressure rating than is specied for
your water heater.
Expansion Control Valve (ECV) - if tted
It is normal and desirable that this valve allows a small quantity of water to be discharged during the heating cycle.
If it discharges more than a bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve leaks continuously, try easing the valve gear for a few seconds. This may dislodge any foreign matter
and alleviate the problem. If this does not alleviate the problem contact Rinnai.
Operate the easing gear regularly to remove any lime deposits and to verify that it is not blocked.
WARNINGS AND IMPORTANT INFORMATION

Rinnai 7 EVT DD Solar Pre Heat System Operation and Installation Manual
HYDROGEN GAS
CAUTION
During this procedure there MUST be no smoking, open ame or any electrical appliance
operating nearby.
In the case of systems using a vitreous enamelled lined cylinder, if the hot water unit is not used for two weeks or
more, a quantity of hydrogen gas, which is highly ammable, may accumulate in the water heater. To dissipate this
safely, it is recommended that a non electrically operated hot tap be turned on for two minutes at a sink, basin, or
bath, but not a dishwasher or other appliance. If hydrogen is discharged through the tap, it will probably make a
sound like air escaping.
WATER TEMPERATURE
The solar control unit and pump ensure water circulates between the solar collectors and storage cylinder until the
water at the base of the cylinder reaches approximately 65°C. Under these conditions water at the hot outlet may
exceed 85°C. During periods of low solar gain supplementary heating occurs as required.
IMPORTANT
To meet Australian regulatory requirements, supplementary heating MUST be operational.
WATER QUALITY
The water quality of most public supplies is suitable for the water heating system. The water quality from bore wells
is generally unsuitable for the water heating system. Refer to separate ‘Warranty Terms and Conditions’ document
for water quality parameters and how they affect the warranty conditions. If in doubt about the water quality, have
it checked against the parameters listed in the warranty conditions. The system is not suitable as a pool or spa
heater.
DRAINING AND FILLING THE WATER HEATING SYSTEM
Draining or lling normally occur only during installation or servicing and must be carried out by an authorised
person.
MAINTENANCE AND REGULAR CARE
Operate the easing gear of the PTR as described in the section ‘Safety Devices’ on page 6.
The overow tray (supplied by installer) and drain underneath the storage cylinder (if tted) should be periodically
checked to ensure there are no blockages.
SERVICING AND REPAIR
Our Servicing network personnel are fully trained and equipped to give the best service on your appliance. If your
appliance needs service, ring one of the service contact numbers on the back of this booklet.
It is recommended that the system be serviced at least every 5 years.
IMPORTANT
The pressure and temperature relief valve and expansion control valve MUST be checked for
performance or replaced by an authorised person at intervals not exceeding 5 years or more
frequently in areas where the water is classied as scaling water (refer to the supplied warranty
booklet).
It is recommended that the sacricial anode tted to Glass Lined cylinders be inspected every 5 years or more
frequently in areas where there is a high incidence of water deposits. This does not apply to Stainless Steel
cylinders. Anodes suited to hard and soft water, are available from Rinnai.
IMPORTANT
If the electric conduit, power supply cord or plug to the water heater is damaged, they MUST be
replaced by an authorised person in order to avoid a hazard. The power supply cord and plug (if
tted) MUST be replaced by a genuine replacement part available from Rinnai.
WARNINGS AND IMPORTANT INFORMATION

Rinnai 8 EVT DD Solar Pre Heat System Operation and Installation Manual
REGULATIONS AND OCCUPATION HEALTH AND SAFETY (OH&S)
WARNING
Installation and commissioning must be performed by authorised persons.
Solar systems must be installed in accordance with these instructions and all regulatory
requirements which exist in your area including those in relation to manual lifting, working at
heights and on roofs. Applicable publications and regulations may include:
• AS/NZS 5601 Gas Installations
• AS/NZS 3500 National Plumbing and Drainage
• AS/NZS 3000 Wiring rules
• Building Codes of Australia (BCA)
• Local Occupational Health and Safety (OH&S) regulations
This appliance is not suitable for use as a domestic spa pool or swimming pool heater.
Solar collectors are heavy and bulky items and are usually positioned on the roofs of buildings.
Australian State and Territories have a principal Occupational Health and Safety (OH&S) Act
which contains requirements relating to the handling of large, bulky or awkward items and the
prevention of falls from elevated surfaces. Persons installing solar collectors must be aware of
their responsibilities and be adequately trained and qualied, in accordance with local OH&S
requirements.
LOCATION - GENERAL INFORMATION
All system components must be in an accessible location. The storage cylinder must be accessible without the use
of a ladder or scaffold. Sufcient clearances shall allow access to, and removal of, all serviceable parts. Ensure the
PTR valve, pump kit, drain lines and thermostat and elements for electric systems have sufcient clearances and
are accessible for service and removal. The information on any data plates must also be readable. In the case of
vitreous enamel lined cylinders, leave a clearance of the height of one storage cylinder above the cylinder being
installed so the sacricial anode can be inspected and replaced. This does not apply to stainless steel cylinders.
Select suitable areas of roof on which to install the solar collectors as close as practicable to the cylinder. Ensure
that the area is even and without cracked or damaged tiles. Collectors should be positioned for optimum solar
benet.
WARNING
Not suitable for use in cylone areas.
HI RISE KITS IN CONJUNCTION WITH SPLIT SYSTEM FLAT ROOF FRAMES
For buildings higher than 10 metres the specications for securing solar panel frames to the building structure need
to be determined on a case by case basis for each building by a person qualied to do so in accordance with the
Building Code of Australia (BCA). Such specications relate to the type of fastenings, the number of fastenings and
their embedment into the building structure. They are determined from factors including the geographical location
and topography, the prevailing wind conditions, building dimensions, rooftop form and structural materials, and
the intended location of the solar panels relative to building internal, edge and corner zones. The BCA references
AS1170.2 “Structural Design Actions Part 2: Wind Actions”, AS3600 “Concrete Structures” and AS4100 “Steel
Structures” in relation to these specications.
STORAGE CYLINDER LOCATION
The solar storage cylinders have an ingress protection rating of IPX4 making them suitable for internal or external
installation. Rinnai ‘external’ gas boosters are suitable for external installation only.
Storage cylinders must be installed in freestanding mode on a level and stable base. For external installations,
storage cylinders should be mounted on a concrete base at least 50mm thick or on well seasoned, evenly spread
hardwood slats with a thickness of at least 25mm. Where property damage can occur, storage cylinders should be
installed with an approved safe tray (overow tray).
Ensure the cylinder does not stand on wet surfaces.
INSTALLATION

Rinnai 9 EVT DD Solar Pre Heat System Operation and Installation Manual
WATER PIPES
All hot water pipework should be insulated with sealed Polyethylene foamed or equivalent insulation to optimise
performance and energy efciency. Such insulation may also be mandatory under local regulations. Rinnai
recommend insulation to achieve an R value of 1.0 K.m2/W. With the exception of solar collector ow and return
pipes, water pipe sizing should be performed in accordance with AS/NZS 3500. All external pipework MUST be
insulated to prevent frost damage.
WATER SUPPLY
The maximum water pressures for the various systems are listed in “Specications” on page 26. Approved
pressure limiting valves may be required if the ‘Maximum’ rated water supply pressures are exceeded. For gas
boosted systems to achieve the rated ow through the outlet of the continuous ow water heater, the minimum
water supply pressures must be supplied. The systems will operate at lower pressures but the rated ow will not
be achieved.
Water chemistry and impurity limits are detailed in the separate Warranty document. 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 in the water supply to the
storage cylinder.
HOT WATER DELIVERY TEMPERATURE
Local regulations and/or the requirements of AS/NZS 3500.4 must be considered regarding the temperature
limitations of hot water supplied to areas used primarily for personal hygiene. The temperature of water to these
areas is limited to 45°C for early childhood centres, primary and secondary schools and nursing homes or similar
facilities for young, aged, sick or people with disabilities and 50°C for all other buildings. To comply with these
requirements, a temperature limiting device, such as a thermostatic mixing or tempering valve, will be required on
all solar hot water systems as detailed below.
NOTE
It is the responsibility of the installer to comply with all local regulations. Hot Water delivery
temperature requirements may differ from those stated above
VALVES AND FITTINGS
The following valves and ttings are supplied with your solar hot water system:
• A combined pressure and temperature (PTR) relief valve, capacity 10 kW. Relief valve pressure settings
vary with models. This valve is tted at the top of the storage cylinder. The PTR valve is a safety device and
it is mandatory that it is tted by the installer in all installations.
• Fittings as shown in the tables on pages 17, 26 and 29.
The following valves & ttings are to be supplied by the installer:
• A cold water expansion control valve (ECV). An ECV must be tted in Western Australia and South Australia
to the cold water supply to the storage cylinder to comply with local regulations. An ECV is recommended in
all other geographical areas where the water supply has a tendency to cause scaling. This will reduce hot
water discharge from the Pressure and Temperature Relief (PTR) valve which minimises wear on this valve.
• A stop cock, non return valve and line strainer. Combination valves incorporating two or more of these
functions (such as ‘Trio’ valves) are suitable. These are tted to the cold water supply to the storage cylinder
by the installer.
• Cold water supply and hot water discharge pipework to and from the storage cylinder.
• Solar collector ow and return pipes and storage cylinder connections.
• An isolating valve and connection union for the gas supply to the gas booster.
• An approved pressure limiting valve is required if the maximum rated water supply pressure in the table in
“Specications” on page 26 is exceeded.
INSTALLATION

Rinnai 10 EVT DD Solar Pre Heat System Operation and Installation Manual
INSTALLATION PROCEDURE
1. Install Solar Collectors
Position and install collectors in accordance with the section the section ‘Installation - Evacuated Tubes’ on
page 12.
2. Position Storage Cylinders
Position storage cylinders on a level base.
3. Connect PTR Valves
Connect PTR valves in the location shown on the diagrams shown on pages 27 and 28.
a. Leave the valve body pointing down. Tighten the valve using the spanner ats - never use the valve body.
b. The PTR must be adequate for the load being applied to the storage cylinder. As any gas boosting is done
after the storage cylinders the only heat input to the tank is from the solar collectors. The potential solar
output for the solar collectors at PTR relief conditions is listed in “Specications” on page 12.
Example: if each tank has 2 EVT25A solar collectors, then the maximum input is 2 x 1.63 kW = 3.26 kW.
This is less than the 10kW capacity of the supplied PTR valve and therefore is OK.
c. Use Teon tape on the valve. Never use hemp or other sealing materials. Ensure the tape does not
protrude past the end of the thread, which could result in it blocking the water passage from the valve.
4. Connect Flow and Return Pipework
Connect the ow and return pipework as shown in the diagrams on page 25, or using a suitable alternative
layout that ensures the ow and return piping is balanced.
5. Connect Pump and other Pipework
Connect the pump, pipework between collectors and cylinders, cold inlet, hot outlet and remaining pipework
and gas boosting choice as shown in the relevant diagram on pages 31 to 33, or other suitable layout.
6. Connect the Solar Controller
With power off, mount the controller per the instructions provided taking particular note of the correct mounting
orientation shown in the picture. DO NOT supply power to the solar controller until the system is lled with
water.
7. Connect Temperature Sensor Leads
Connect temperature sensor leads as shown on page 24 and 30. Ensure the leads are protected from
sunlight. The sensors must be sealed in place with thermoplastic putty or silicon.
It is important that these leads are installed as specied. Failure to do so will lead to malfunction or lack of
hot water.
DO NOT install the controller on its side or back!
The controller MUST
be installed in an up-
right and vertical ori-
entation ONLY!
INSTALLATION

Rinnai 11 EVT DD Solar Pre Heat System Operation and Installation Manual
8. Fill the System
Ensuring the power supply to the pump is off; turn on a hot water outlet tap(s). Remove the screw from the
pump to allow air to bleed out. Open the stop cock in the cold water mains supply line. The entire system will
ll with cold water. Once the pump is no longer bleeding air, replace the screw and continue to bleed the air
through the taps. Air will be displaced through the tap and some air needs to be bled off using the air bleed
valve on the collector near the hot sensor lead.
Turn off the hot tap at the sink when water ows freely without air bubbles or air bursts.
9. Adjust Pump Speed
Adjust the pump to the speed specied on page 14.
10. Check for Leaks
Check all connections for leakage and tighten if necessary. This is especially important for all ttings in
positions not easily accessed such as near the solar collectors. Operate the easing gear of both PTR and
ECV valve at the storage cylinders to ensure these valves are functional.
CAUTION
If leaks are detected the system must be drained and leaks repaired before the system is relled.
If this is necessary, cover the solar collectors with packaging cardboard or a tarp to prevent them
from heating which could result in steam or hot water being discharged from ttings
11. Power up the Controller
Power up the controller, which should be factory set to the desired operating parameters, and observe for any
unlikely immediate errors. An error at this point usually refers to something that has been missed during the
installation procedure. Refer to the separate manual supplied with the controller for more details
12. Finishing the Installation
Ensure that the set temperature on the gas boosting (Demand Duo or Manifold Pack) is set to 60°C or above.
Ensure that the delivered temperature of the water to the building complies with all relevant regulations.
INSTALLATION

INSTALLATION - EVACUATED TUBES
Rinnai 12 EVT DD Solar Pre Heat System Operation and Installation Manual
REGULATIONS AND OCCUPATION HEALTH AND SAFETY (OH&S)
Installation and commissioning must be performed by authorised persons. Rinnai solar systems must be installed
in accordance with these Instructions and all regulatory requirements which exist in your area including those in
relation to manual lifting, working at heights and on roofs. Applicable publications and regulations may include:
• AS/NZS 5601 Gas Installations
• AS/NZS 3500 National Plumbing and Drainage
• AS/NZS 3000 Wiring rules
• Building Codes of Australia
• Local Occupational Health and Safety (OH&S) regulations
WARNING
Solar collectors are heavy and bulky items and are usually positioned on the roofs of buildings.
Each Australian State and Territory has a principal Occupational Health and Safety (OH&S) Act
which contains requirements relating to the handling of large, bulky or awkward items and the
prevention of falls from elevated surfaces. Persons installing solar collectors must be aware of
their responsibilities and be adequately trained and qualied, in accordance with local OH&S
requirements.
SPECIFICATIONS
EVT20A EVT25A EVT30A
Number of tubes 20 25 30
Waterways Copper Copper Copper
Threaded Connections R¾ R¾ R¾
Maximum operating pressure 1000 kPa 1000 kPa 1000 kPa
Frame material Aluminium Aluminium Aluminium
Overall dimensions 1980 x 1692 x 145 1980 x 2082 x 145 1980 x 2472 x 145
Weight empty 80 kg 100 kg 120 kg
Potential solar output at PTR relief
conditions 1.30 kW 1.63 kW 1.96 kW
Frost Protection
Frost Protection to -12 °C.
Power must be on at the pump, and the solar controller must be in
frost protection mode. See page 30.
For more information on frost protection, refer to the warranty booklet.

INSTALLATION - EVACUATED TUBES
Rinnai 13 EVT DD Solar Pre Heat System Operation and Installation Manual
Dimensions - Base Frame
A
B
C115
140
1980
1800
Dimension (mm)
Model A B C
EVT20A 1670 1530 765
EVT25A 2060 1920 960
EVT30A 2450 2310 1155
Dimensions - Flat Roof Frame
1705
30°
1115

INSTALLATION - EVACUATED TUBES
Rinnai 14 EVT DD Solar Pre Heat System Operation and Installation Manual
SYSTEM ORIENTATION AND INCLINATION
The performance of any solar hot water system is determined by the way that the system is installed. In Australia,
the solar collectors ideally should face the equator (North) as shown below. Where this orientation is not practical,
collectors facing within 45° from North (between North-East and North-West) are acceptable and will only slightly
reduce efciency.
The inclination of the solar collectors should ideally be the same as the latitude angle of the site. Inclinations within
20° of the latitude angle of the site will only slightly reduce efciency. Most roofs within Australia have a slope of
between 20° and 25° and provide an appropriately angled mounting surface.
Orientation and inclination of collectors
Installers must ensure they comply with relevant local regulations in regards to inclination and orientation.
City Latitude City Latitude City Latitude
Adelaide 35°S Canberra 35°S Melbourne 38°S
Albany 35°S Darwin 12°S Perth 32°S
Alice Springs 24°S Dubbo 32°S Port Hedland 20°S
Brisbane 27°S Geraldton 28°S Rockhampton 24°S
Broken Hill 31°S Hobart 42°S Sydney 34°S
Cairns 17°S Mildura 34°S Townsville 19°S
Latitudes of Australian Cities
PIPE AND PUMP SIZING
NOTE
Ensure that the combined length of the ow and return piping for each collector set is approximately
the same. This will result in even ow to all collectors and optimise performance.
Total Collectors in array Up to 10 20 30 40 50 60 70 80 90 100
Piping sizing for solar ow
and return manifolds DN20 DN20 DN25 DN32 DN32 DN32 DN40 DN40 DN40 DN50
Pump 20-60N 20-60N 20-60N 25-80N 25-80N 25-80N 25-80N 25-80N 25-80N 25-80N
Maximum pipe run in collector circuit (m)
Pump Speed
130 - - - - - - - - -
260 40 20 - - - - - - -
3100 100 100 100 100 100 100 100 100 100

INSTALLATION - EVACUATED TUBES
Rinnai 15 EVT DD Solar Pre Heat System Operation and Installation Manual
COMPONENTS
Evacuated Tube Collector Components
Each evacuated tube collector installation requires several components packaged within different boxes. Please
ensure you have all the relevant boxes before starting installation
Component Part Number
PITCH ROOF FLAT ROOF
30
tubes
40
tubes
50
tubes
30
tubes
40
tubes
50
tubes
Manifold, base frame and
“Tail Stock”
EVTMAN20R5A 2 2
EVTMAN25R5A 2 2
EVTMAN30R5A 1 1
EVTFRM20R5A 2 2
Pitch Roof Mounting Kit
EVTPIT20R5A 2
EVTPIT25R5A 2
EVTPIT30R5A 1
Flat Roof Frames
EVTFRF20R5A 2
EVTFRF25R5A 2
EVTFRF30R5A 1
Evacuated Tubes
EVTUBE10R5A 4 2 4 2
EVTUBE15R5A 2 2 2 2
Additional Installation
Components
EVTRFBRKTSS 1 1
DDEVTCPLKIT 1 1 1 1
Evacuated Tubes
Part Number Number of tubes in
pack * Item
EVTUBE10R5A 10
Evacuated Tube (including heat pipe)
EVTUBE15R5A 15
*NOT AVAILABLE INDIVIDUALLY

INSTALLATION - EVACUATED TUBES
Rinnai 16 EVT DD Solar Pre Heat System Operation and Installation Manual
Manifold, Base Frame and Bottom Support Assembly Kit Components
EVTMAN20R5A
EVTMAN25R5A
EVTMAN30R5A
EVTFRM20R5A
Item
EVTMAN20R5A
EVTMAN25R5A
EVTMAN30R5A
EVTFRM20R5A
1 1 1 -
Manifold Header
(to suit required number of tubes)
1 1 1 -
Bottom Support Assembly
(CAP TUBES M&F EV - 40011214)
- 3 3 3
1980 mm long
Base Frame Rail A-
- 2 2 2
EVT20A 1560 mm
EVT25A 1950 mm
EVT30A 2340 mm
Base Frame Rail B
20 25 30 -
CAP DUST EV - 40011220
1 1 1 -
PASTE HEAT EV - 40011222
6 6 6 -
M8-16 Nut and Bolt
9 9 9 -
M6-12 Nut and Bolt
Pitch Roof Mounting Kits
EVTPIT20R5A
EVTPIT25R5A
EVTPIT30R5A
EVTRFBRKTSS
Item
EVTPIT20R5A
EVTPIT25R5A
EVTPIT30R5A
EVTRFBRKTSS
Item
2 2 2 -
Pitch Roof Rail - - - 4
Tiled Roof Mounting Hook
- - - 4
Tiled Roof Mounting Clips
- - - 20
M6 Screws
- - - 8
M8-16 Nut and Bolt

INSTALLATION - EVACUATED TUBES
Rinnai 17 EVT DD Solar Pre Heat System Operation and Installation Manual
Flat Roof Frame Kits
EVTFRF20R5A
EVTFRF25R5A
EVTFRF30R5A
Item
EVTFRF20R5A
EVTFRF25R5A
EVTFRF30R5A
Item
1 1 1
FRF Leg Mid
222
FRF Leg Side
3 3 3
FRF Side Brace Short
3 3 3
FRF Side Brace Long
4 4 4
FRF Back Brace
6 6 6
FRF Foot
3 3 3
FRF Bracket
2 2 2
M6-25 Nut and Bolt
39 39 39
M6-12 Nut and Bolt
Collector Joining Kits
DDEVTCPLKIT
Item
DDEVTCPLKIT
Item
1
3/4 Rp Barrel Union 32201105 Insulation for Barrel Union 14601214

INSTALLATION - EVACUATED TUBES
Rinnai 18 EVT DD Solar Pre Heat System Operation and Installation Manual
ASSEMBLY INSTRUCTIONS
Assemble Base Frame
Step 1. Place the manifold header and the bottom
support assembly upside down. Place the
three Base Frame Rail A as shown in the
diagram.
Step 2. Fasten the rails to the header using the nuts
supplied with the header.
Step 3. Fasten the rails to the bottom support
assembly using the M8 nuts and bolts
supplied.
Step 4. Position the two Base Frame B rails under
the existing components
Step 5. Fasten using the M6 nuts and bolts supplied. Step 6. Turn assembly up correct way

INSTALLATION - EVACUATED TUBES
Rinnai 19 EVT DD Solar Pre Heat System Operation and Installation Manual
Installation on a Pitched Tile Roof
Step 1. Carefully remove a roof
tile.
Step 2. Position the mounting
bracket as shown.
Step 3. Fasten the bracket to roof
structure using suitable
screws.
Step 4. Fasten the bracket to roof
structure.
Step 5. Replace the roof tile. Step 6. Fit the mounting rail in
bracket and fasten
Step 7. Repeat steps 1 to 6 for
the remaining brackets
and rail.
Step 8. Position the base frame
on the rails.
Step 9. Fasten the assembly
using the mounting clips

INSTALLATION - EVACUATED TUBES
Rinnai 20 EVT DD Solar Pre Heat System Operation and Installation Manual
INSTALLATION ON A PITCHED METAL ROOF
Fasten the base frame to the roof battens/purlins as shown in the diagram below. The base rails should sit on the
peak of the roong material to minimise the chance of water leaks. The frame must be fastened to the battens in
at least 9 locations. Fasteners should be as close as possible to the header and the bottom support assemblies. It
will be necessary to drill through the aluminium base frame.
For timber battens/purlins use 14G, Ø6.3 timber
screws (or equivalent) with a minimum embedment of
35 mm into the batten.
For a metal batten/purlin use 14G, Ø6.3 tek screws
(or equivalent). Minimum steel thickness 0.75 mm,
grade 550.
All penetrations into the roof material are to be sealed
by the installer. It is the responsibility of the installer to
ensure the installation is watertight.
This manual suits for next models
2
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