Rinnai brivis StarPro SP4UN User manual

StarPro Ducted Gas Heater
Installation Manual
Models:
BX5
SP4UN
BX5 SP4UN

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This appliance must be installed in accordance with:
• Manufacturer’s Installation Instructions
• Current AS/NZS 3000, AS/NZS 5601, AS/NZS 5141
• AS 4254, HB 276-2004
• Local Regulations and Municipal Building Codes
including local OH&S requirements
This appliance must be installed, maintained and removed
only by an Authorised Person.
For continued safety of this appliance it must be installed
and maintained in accordance with the manufacturer’s
instructions.
All Rinnai gas products
sold in Australia are
A.G.A. certified.

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Table of Contents
Warnings and Important Information 5
1. Scope 7
1.1 SP4UN Heater Overview ................................................................................................................................. 7
1.2 BX5 Heater Overview....................................................................................................................................... 7
1.3 Installer Due Diligence for Changeovers ......................................................................................................... 8
Definitions................................................................................................................................................................... 8
Disclaimer................................................................................................................................................................... 8
2. General Product Guidelines 9
2.1 Application and Sizing...................................................................................................................................... 9
2.2 Inspection......................................................................................................................................................... 9
2.3 Unpacking the Heater ...................................................................................................................................... 9
2.4 Unloading or Lifting the Heater ........................................................................................................................ 9
2.5 Service Connection Guidelines...................................................................................................................... 10
2.5.1 Gas Inlet Connection ......................................................................................................................... 10
2.5.2 Electrical Power Supply ..................................................................................................................... 10
3. Heater Dimensions and Clearances 11
3.1 Heater Dimensions – SP4UN ........................................................................................................................ 11
3.2 Heater Dimensions – BX5.............................................................................................................................. 11
3.3 Service Clearances – Internal........................................................................................................................ 12
3.3.1 Service Clearance Notes ................................................................................................................... 12
3.3.2 Internal Clearances............................................................................................................................ 12
3.4 Service Clearances – External....................................................................................................................... 13
3.4.1 Installation of Flashing ....................................................................................................................... 13
3.4.2 SP4UN External Clearances ............................................................................................................. 13
3.4.3 BX5 Service Clearances.................................................................................................................... 13
4. Heater Configuration 15
4.1 Heater Duct Pop Installation .......................................................................................................................... 15
4.2 Duct Connection Configuration Options......................................................................................................... 15
Return Air Orientation............................................................................................................................................... 16
4.2.1 SP430UN and SP435UN Fan Cabinet: Swap F1 – F2 ..................................................................... 16
4.2.2 SP415UN, SP421UN Fan Cabinet: Swap F1/F2 – F3 ...................................................................... 16
Supply Air Orientation .............................................................................................................................................. 16
4.2.3 SP4UN Heater Cabinet: Swap H1/H2 – H3 ...................................................................................... 16
4.3 SP4UN Series Gas Feed Tube Installation ................................................................................................... 17
5. Heater Positioning 18
5.1 Wall Cut-out Area........................................................................................................................................... 18
5.2 Splitting Heater for Assisted Lifting and Positioning ...................................................................................... 18
5.2.1 SP4 Universal Heater ........................................................................................................................ 18
5.3 Internal Installations ....................................................................................................................................... 19
5.3.1 Installation in the Roof Space............................................................................................................ 19
5.3.2 Installation Beneath the Floor............................................................................................................ 19
5.3.3 Ventilation Calculations...................................................................................................................... 19
5.4 External Installations ...................................................................................................................................... 20
5.4.1 SP4UN – Installation of Flashing....................................................................................................... 20

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6. Flue Instructions and Clearances 21
6.1 Internal – SP Series ....................................................................................................................................... 21
6.1.1 General .............................................................................................................................................. 21
6.1.2 SP4UN Models – 100mm Non-corrosive Metal Flue......................................................................... 21
6.1.3 Remote Terminal (Part No. B018384) Internal Model Applications................................................... 21
6.2 External Flue Terminal Clearances................................................................................................................ 22
6.2.1 Installation of Flue Terminal............................................................................................................... 22
7. Thermistor Installation 23
7.1 SP4UN Series Thermistor Installation ........................................................................................................... 23
7.2 BX5 Thermistor Installation............................................................................................................................ 23
8. Ducting and Outlets 25
8.1 Duct Design and Sizing.................................................................................................................................. 25
8.2 Return Air Grille.............................................................................................................................................. 25
8.3 Return Air Pop Configuration Changes ......................................................................................................... 25
8.4 Outlet Chart Information................................................................................................................................. 26
9. Thermostat Installation 28
9.1 SP4UN and BX5 Series Thermostat Positioning Guidelines......................................................................... 28
9.2 Programmable and Manual Thermostat Installation ...................................................................................... 28
9.2.1 Connect a Programmable Thermostat............................................................................................... 28
9.2.2 Connect a Manual Thermostat .......................................................................................................... 29
10. Networker Installation: Single and Multiple Connections 31
10.1 Networker Installation..................................................................................................................................... 31
10.2 Connect a Networker to SP4UN or BX5 Series Heaters............................................................................... 31
10.3 Connect a Networker to a BX5 Heater .......................................................................................................... 31
10.3.1 Connect Multiple Heaters to a Networker.......................................................................................... 32
10.3.2 Connect Dual Networkers.................................................................................................................. 32
10.3.3 Change a Networker from Slave to Master ....................................................................................... 33
10.3.4 Network 516 Manual.......................................................................................................................... 33
10.3.5 ZonePlus............................................................................................................................................ 33
11. Adaptive Zoning and Add-on Air Conditioning 34
11.1 Options........................................................................................................................................................... 34
11.2 Damper Motor Connections ........................................................................................................................... 34
11.3 Connect a Damper Motor to the Control Module........................................................................................... 35
12. Commissioning and Control Settings 36
12.1 SP4UN and BX5 Heater Control Settings...................................................................................................... 36
12.2 SP4UN and BX5 Commissioning Instructions ............................................................................................... 38
12.2.1 Initial Damper Settings....................................................................................................................... 38
12.2.2 Initial Ignition and Gas Inlet Pressure Check .................................................................................... 38
12.2.3 Heater Temperature Settings and Fan Speed................................................................................... 38
12.3 Final Checks (SP4UN and BX5 Heaters) ...................................................................................................... 40
12.4 Fault Code Identification on Heater PCB....................................................................................................... 40
13. Technical Specifications 42

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WARNING
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and to ensure
optimum performance.
Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in
personal injury or death.
WARNINGS: Indicates a potentially hazardous situation which, if not avoided, could result in
personal injury or death.
CAUTIONS: Indicates a potentially hazardous situation which, if not avoided, could result in
minor or moderate injury or damage to the appliance. It may also be used to alert against unsafe
practices.
WARNING
REGULATORY / INSTALLATION
This appliance shall be installed in accordance with:
• Manufacturer’s Installation Instructions.
• Current AS/NZS 5601, AS/NZS 5141 and AS/NZ 3000.
• AS 4254 - Ductwork for air-handling systems in buildings.
• HB 276-2004 – A Guide to Good Practice.
• Local Gas and Electricity Authorities.
• “SuperSizeGuide”
• Building Code of Australia (BCA) including local OH&S requirements
• Environment Authorities
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 accordance with the
manufacturers instructions.
This appliance is heavy, use 2 people or mechanical lifting device. Improper lifting may result in
serious injury.
Take care when opening or unpacking this appliance. Failure to do so may result in serious injury
or product failure.
DO NOT modify the electrical wiring of this appliance. If the control power wiring is damaged
or deteriorated then it must be replaced by an authorised person. Failure to do so may result in
electric shock, re, serious injury or product failure.
DO NOT install the heater on an unstable or non level surface or where there may be a danger
of it falling. It may result in death, serious injury, or product failure.
DO NOT install the outdoor unit where noise may cause nuisance.
NOTE
A NOTE ON ILLUSTRATIONS
The illustrations used in this manual are for explanatory purposes only and the shape of your unit
may vary slightly from that which is shown in this manual.
WARNINGS AND IMPORTANT INFORMATION

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NOTE
The manufacturer cannot guarantee compatibility and support for anyone using 3rd party
accessory/devices (device) on any of their appliances.
The suitability, compatibility or functional performance of any 3rd party device is entirely the
responsibility of the device’s supplier or installer.
Any 3rd party device, technical, installation, operation, performance or other enquiries need to be
referred to the device’s supplier or installer.
Any adverse e󰀨ects of 3rd party devices on the operation, performance or reliability of this
appliance is not covered by the manufacturer’s product warranty.
WARNING
MANDATORY INSPECTION PRIOR TO INSTALLATION
Immediately report any damage or discrepancies to the Supplier of the appliance. This
appliance was inspected and tested at the time of manufacture and packaging, and released for
transportation without known damage. Upon receipt, inspect the exterior for evidence of rough
handling in shipment. Ensure that the appliance is labelled correctly for the gas and electrical
supply, and/or other services it is intended to be connected to.
For safety and warranty purposes, appliances that may be damaged or incorrect must not be
installed or operated under any circumstances. Installation of damaged or incorrect appliances
may contravene local government regulations. Rinnai disclaims any liability or responsibility
whatsoever in relation to the installation or operation of damaged or incorrect appliances.

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1. SCOPE
This installation manual is intended to be used as a guideline for the installation of Gas Fired Central Heaters.
It covers only the installation and commissioning of the heater and the allowable ueing congurations. Although
recommended return air grilles and allowable duct outlet quantities are specied, it does not cover the actual ducting
design required to suit the installation.
This installation manual is based on Australian codes. For all other applications, please refer to local codes and
regulations.
These heaters must be installed and serviced only by qualied personnel. This manual applies to the following
models:
5 Series 4 Series Heaters
External Universal
BX520EN SP415UN
BX526EN SP421UN
SP430UN
SP435UN
1.1 SP4UN Heater Overview
SP4UN series heaters are non-condensing heaters.
Universal models may be used in both internal and external applications.
For more details refer to Technical Specications section.
1.2 BX5 Heater Overview
The BX520 and BX526 ducted heaters are designed primarily to replace Bu󰀨alo 85 and Bu󰀨alo 120 heaters
respectively. Their conguration allows for seamless changeover onto an existing base box, where applicable, with
identical service connections, capacities and airows commensurate with the original units. They also incorporate
on-board controls providing greater exibility for thermostat and zone control options.

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1.3 Installer Due Diligence for Changeovers
Modern ducted gas heaters, even those that are physically ‘like-for-like’, typically have di󰀨erent technical specications
and control systems to existing, older models. Modern units usually have higher Star Ratings, which are accompanied
by higher airows. Higher e󰀩ciency heaters with modulating gas valves also operate di󰀨erently to non-modulating
units.
When doing a direct unit change over:
• Do a comprehensive inspection of the entire existing system to ensure it is ‘t for purpose’ with the new heater
• Check existing items that are not being replaced; i.e. ensure the soundness and suitability of all ttings and
controls for use with the new ducted gas heater (e.g. Duct sizes, Flue, Return Air grille size, Thermostat, Zoning
etc.)
• Correctly commission the new ducted gas heater – where possible, align it with the performance characteristics
of the original system – do not leave units at the factory default settings unless you are absolutely certain the
settings are appropriate
Failure to observe best practice can lead to costly call backs for installers, unnecessary manufacturer warranty calls
and a poor customer experience.
With our policy of continuous improvement, we reserve the right to change, or discontinue at any time, specications
or designs without notice.
Definitions
Shall
Indicates a mandatory requirement of this manual.
Should
Indicates a recommended requirement of this manual.
Any deviations from these instructions may, at the discretion of the manufacturer, void the warranty. As a result, the
customer and/or installer may be charged a fee for non-product warranty related call outs. Also note that failure to
comply with these instructions may preclude company service personnel from being able to service the unit.
Disclaimer
IMPORTANT
This document is a guide only. Laws, regulations and industry standards can vary between
States and Territories. Accordingly, this guide must be read in conjunction with, and subject
to, all laws, regulations and industry standards applicable in the State or Territory in which the
products are installed. You must ensure that the installation of the products will comply with
those laws, regulations and standards, and that the products recommended to customers are
t for the purpose for which they are intended.

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2. GENERAL PRODUCT GUIDELINES
2.1 APPLICATION AND SIZING
These heaters are designed to provide a central source of heat for a ducted central heating system.
The heaters should not be installed downstream from an air washer, an evaporative cooler or refrigerative cooling
system. Nor are they designed to be installed on a marine craft, houseboat, or any similar environment.
The heaters must be installed in accordance with these instructions and related regulations, codes, standards, and
authorities. These include but may not be limited to:
• AS/NZS 3000 - Electrical Installations
• AS/NZS 5601 - Gas Installations
• AS 4254 - Ductwork for air-handling systems in buildings
• HB 276 - A Guide to Good Practice
• AS/NZS 5141 - Residential Climate Control Systems
• Local Gas and Electricity Authority Codes
• Product Sizing Guide
• Local Building Regulations
• Environment Authorities
• National Construction Code of Australia (NCC)
NOTE
The manufacturer assumes no responsibility for equipment installed in violation of any code,
regulations and these installation instructions.
It is recommended the Product Sizing Guide is followed in estimating heating requirements and for system design
that will result in efficient installation and provide a higher level of comfort and economical operation.
For the hourly input and the gas type to be used, refer to the appliance data label located inside the service
compartment or the Technical Specifications at the rear of this manual.
NOTE
All installations should only be carried out by a qualified tradesperson. Installations at altitudes
above 1000m above sea level may require main burner injector upgrading. Please contact the
Customer Service Centre for advice.
2.2 INSPECTION
This appliance has been inspected and tested at the time of manufacture and packaging and released for
transportation without known damage. Upon receipt, inspect the exterior for evidence of rough handling in shipment.
Ensure that the appliance is labelled correctly for the gas to which it is intended to be connected. If a discrepancy or
damage to the appliance is identified DO NOT install the appliance and report findings back to supplier.
2.3 UNPACKING THE HEATER
Some heaters are supplied on a pallet with a plastic sleeve. To unpack:
Cut and remove the external plastic packaging and dispose of thoughtfully.
Remove heater from pallet (if supplied).
Some heaters are supplied with a base box assembly wrapped with a removable plastic film to protect the surface.
NOTE
Always remove and dispose of the plastic film before mounting the heater onto the base box.
2.4 UNLOADING OR LIFTING THE HEATER
When unloading or lifting the heater, ensure lifting equipment is in good operating condition and capable of lifting
the total load. Be sure there is a clear area to place the heater down, which is within reach of the lifting equipment.
NOTE
Do not use the lifting handles provided to lift the heater above head height. If fitting the heater
to elevated heights such as a roof, use suitable lifting equipment.

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2.5 SERVICE CONNECTION GUIDELINES
2.5.1 Gas Inlet Connection
• All piping must be in accordance with AS/NZS 5601 and any local gas regulations.
• The connection point for universal and external model heaters is a female G3/4 compression fitting to AS 3688.
This is either located on the outer cabinet of the heater, or supplied loose within the heater.
• The connection point for internal model heaters is a male G3/4 compression fitting to AS 3688.
• A gas cock shall be fitted in the gas line adjacent to the heater and in a convenient location so it can be turned
OFF quickly and easily.
• The gas supply shall in no way interfere with any servicing of the heater.
NOTE
The gas supply must be installed by a licensed gas fitter. The gas pipe and gas meter should be
sized so the heater can maintain its required incoming gas pressure at maximum consumption
with all other gas appliances operating at their maximum capacity at the same time as the heater.
2.5.2 Electrical Power Supply
The heater is pre-wired with a 3-pin plug and lead, and shall be plugged into a standard 10 Amp 220-240V fixed
switched socket outlet adjacent to the heater in a convenient location so it can be turned OFF quickly and easily.
NOTE
A qualified electrician must install the 220 to 240 volt wiring according to local regulations.
IMPORTANT
Switch OFF the power and unplug the heater before touching any wiring. If any electrical wiring
is damaged, it must be replaced by the manufacturer, its service agents or an electrically
qualified technician, in order to avoid a hazard.
The electricity supply must be 220-240V at 50Hz, and supplied by an authorised power supplier. Generators should
never be used to supply this system as their output may be incompatible with, or prone to damage electronic
components of the heater.
GENERAL PRODUCT GUIDELINES

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3. HEATER DIMENSIONS AND CLEARANCES
3.1 HEATER DIMENSIONS –SP4UN
Diagram 1. SP4 Universal Heater Dimensions
Table 1. SP4 Universal Heater Dimensions (mm)
Universal Model A B C D E F G H J L M N øSa øRa
SP415UN 14 397 197 235 625 471 448 845 197 95 495 447 300 300
SP421UN 14 397 197 235 625 471 448 845 197 95 495 447 300 300
SP430UN 14 549 197 235 644 491 497 923 237 250 515 487 350 350
SP435UN 14 549 197 235 644 491 497 923 237 250 515 487 400 400
NOTE
SP4 Universal models are approved for internal or external applications.
3.2 HEATER DIMENSIONS –BX5
Diagram 2. BX5 Heater Dimensions
FLUE
TERMINAL
GAS
INLET
Ø P M
K
L
N
J
A
B
F
D
H
E
G
C
Table 2. BX5 Heater Dimensions (mm)
MODEL A B C D E F G H J K L M N P
BX520 775 852 420 341 41 156 135 391 1145 715 1085 370 771 300
BX526 866 1028 582 387 41 238 135 557 1280 805 1220 415 951 350
E
F
ØRa
FLUE OUTLET
G
H
GAS INLET
ØSa
J N C
D
L
B
M
A

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3.3 SERVICE CLEARANCES –INTERNAL
3.3.1 Service Clearance Notes
All SP415UN and SP421UN models can be installed in accordance with 'Method 1', 'Method 2', 'Method 3' and
'Method 4' below. The SP430UN and SP435UN can be installed in accordance with 'Method 1' and 'Method 2' only.
3.3.2 Internal Clearances
Method 1: In Ceiling and Under Floor
Diagram 3. Method 1 Clearances
Method 2: In Ceiling and Under Floor
Diagram 4. Method 2 Clearances
Method 3: Lay-down Option – In Ceiling
Diagram 5. Method 3 Clearances
750mm
Minimum
Fan
Cabinet
Heat
Exchanger
Cabinet
250 mm
Minimum
750mm
Minimum Service Clearance
Heat
Exchanger
Cabinet
Fan Cabinet
Platform
Side View Plan View
Fan
Cabinet
Heat
Exchanger
Cabinet
800 mm
Minimum
Platform
Service Clearance
Heat
Exchanger
Cabinet
Fan Cabinet
750mm
Minimum
Side View Plan View
Fire resistant board
(refer to AS5601)
700 mm
750 mm
300 mm (refer to AS5601)
Side View
Service
Clearance
(Full length of heater)
HEATER DIMENSIONS AND CLEARANCES

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Method 4: Lay-down Option – Under Floor
Diagram 6. Method Clearances
NOTE
Method 3 and Method 4 are not options for SP430UN and SP435UN models. These models may
be installed to Method 1 or Method 2 only.
3.4 SERVICE CLEARANCES –EXTERNAL
3.4.1 Installation of Flashing
The flashing must be fitted to ensure the ductwork is adequately weather protected.
NOTE
To allow the heater to be moved out from the wall such as for servicing, it is important to provide
additional length in the ducting connected to the pops.
3.4.2 SP4UN External Clearances
Front: A minimum of 500mm must be provided at the side facing away from the house.
End: A minimum of 300mm must be provided at each end of the heater.
Top: A minimum of 1000mm must be provided above the heater roof. This clearance must be maintained for the
entire surface area of the heater roof.
Diagram 7. External Clearances
1000 mm min
Side View
Service
Clearance
500 mm
min
Service
Clearance
Plan View
Service Clearance
500 mm min
300 mm
min
300 mm
min
(Front)
(Top)
(Front)
(End)(End)
Flashing
3.4.3 BX5 Service Clearances
Front: A minimum of 500mm must be provided at the side facing away from the house.
End: A minimum of 300mm must be provided at each end of the heater.
Top: A minimum of 1000mm must be provided above the heater roof. This clearance must be maintained for the
entire surface area of the heater roof.
Ground
750 mm
200 mm (refer to AS5601)
Lowest part of floor structure
Concrete Base 50mm
Service
Clearance
(Full length of heater)
700 mm
Side View
HEATER DIMENSIONS AND CLEARANCES

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Diagram 8. BX5 Clearances
1000 mm min
500 mm
min
Service Clearance
500 mm min
300 mm
min
300 mm
min
Side View
Plan View
Service
Clearance
Service
Clearance
(Top)
(Front)
(Front)
(End) (End)
Flashing
HEATER DIMENSIONS AND CLEARANCES

Rinnai 15 Ducted Gas Heater IM
4. HEATER CONFIGURATION
4.1 HEATER DUCT POP INSTALLATION
On SP4UN series heaters, the duct connection pops need to be fastened to the heater cabinet as follows:
• Insert pops into the hole in the pop plate, ensuring the pop flange is placed over the prescribed wall of the
cabinet, refer to Table 3.
• Spread pop flange to fit tightly into the hole in the cabinet (the notch side overlapping the other).
• Secure pops with the rivets supplied.
Table 3. Pop Installation Matrix
Return Air Supply Air
No. of Walls Install Pop No. of Walls Install Pop
Universal Model Cabinet SP4UN 2 Inner Wall 2 Inner Wall
4.2 DUCT CONNECTION CONFIGURATION OPTIONS
(Not applicable BX5 Models)
For SP4UN series heaters, the return air and supply air duct connections can be reconfigured. That is, the heater
panels can be repositioned to move the duct outlet/inlet to the back or to the side of the unit to suit the specific
installation.
Change Duct Connection Locations
Simplistically, the heater unit is made up of two cabinets: a heater cabinet (air heating components) and a fan
cabinet, (supply air fan). Diagram 9 identifies three pop positions on the heater cabinet (H1, H2 and H3) and three
pop positions on the fan cabinet (F1, F2 and F3).
Diagram 9. Duct Connection Options
Return Pop Position
from Factory
Supply Pop
Position
from
Factory
F1
HEATER CABINET FAN CABINET
RETURN AIR
SIDE
SUPPLY AIR
SIDE
F2
H1
H2
H3 F3
SP430UN and SP435UN: The pops can be configured to support any combination of the following options:
• Return air pop: Can be positioned at F1 or F2 (Diagram 9).
• Supply air pop: Can be positioned at H1, H2 or H3.
SP415UN and SP421UN: The pops can be configured to support any combination of the following options:
• Return air pop: Can be positioned at F1, F2 or F3 (Diagram 9).
• Supply air pop: Can be positioned at H1, H2 or H3.

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Return Air Orientation
4.2.1 SP430UN and SP435UN Fan Cabinet: Swap F1 – F2
a. Remove the lid.
b. Remove F1 and F2 panels (Diagram 9).
c. Remove the internal blanking panel (four screws behind insulation).
d. Install the blanking panel in the required position.
e. Install F1 and F2 panels in the required positions.
f. Install the lid.
4.2.2 SP415UN, SP421UN Fan Cabinet: Swap F1/F2 – F3
(Not available for SP430UN and SP435UN)
a. Remove the lid (Diagram 9).
b. Remove the F3 handle and flue terminal, and then remove the panel.
c. Remove the flue hole blanking plate from F1 or F2 as required, then remove the panel.
d. Remove the internal blanking panel (four screws behind insulation).
e. Install the blanking panel in the required position.
f. Install the panels in the required positions.
g. Install the flue terminal and flue hole blanking plate.
h. Install the lid.
IMPORTANT
RETURN AIR CONNECTION AT THE END OF THE UNIT -REAR ENTRY (F3)
Connecting the return air duct to the end of the unit reduces the rated airflow by up to 30%.
The total number of outlets normally permitted for a heating system shall be reduced by 2
(predominantly when a unit is laid down). Refer to the outlet register chart on "Table 6. Outlet
Register Chart" on page 27
For ADD-ON cooling applications, MAKE SURE that the minimum recommended airflow
is maintained. Refer to the ADD-ON installation manual for more information.
Supply Air Orientation
4.2.3 SP4UN Heater Cabinet: Swap H1/H2 – H3
a. Remove the lid (Diagram 9).
b. Remove the H3 handle, and then remove the panel.
c. Remove H1 or H2 panel as required.
d. Remove the internal blanking panel (four screws behind insulation).
e. Install the blanking panel in the required position.
f. Install the external panels in the required positions.
g. Install the lid.
NOTE
Feed tube knockout opening will need to be removed prior to installing the feed tube. Grommet
for feed tube provided.
HEATER CONFIGURATION

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4.3 SP4UN SERIES GAS FEED TUBE INSTALLATION
SP4UN model heaters are supplied with a gas feed to be in the controls area beneath the lid. The gas feed shall be
installed on to the heater gas valve and tested for leaks.
For SP4 Universal heaters install the gas feed tube as follows:
a. Change the pop (duct connection) locations as required. This ensures the pre-cut blanking plate is removed from
the correct cabinet panel.
b. Remove the pre-cut blanking plate covering the hole in the upper corner of the end panel near the gas valve
assembly.
c. Position the gas feed tube from the gas valve out through the hole.
d. Install the compression fitting to the valve assembly to connect the feed tube. Do not over-tighten the compression
fitting.
HEATER CONFIGURATION

Rinnai 18 Ducted Gas Heater IM
5. HEATER POSITIONING
Install the heater in a position that allows adequate and safe access for service as per guidelines in this manual
and applicable standards. The cost of any equipment and additional labour involved in accessing such heater
installations will not be accepted by the manufacturer.
NOTE
Service clearance measurements must be complied with, to avoid impeding the serviceability of
the heater.
5.1 WALL CUT-OUT AREA
5.1.1 When installing the heater at ground level, create two holes to suit the pops, ensuring there is no
impediment to the structural integrity of the dwelling. Create two holes all the way to ground level (refer to
Diagram 10), or one hole to cover the distance of both pops.
NOTE
Refer to Table 1 to obtain the dimensions for the model of heater being installed.
Diagram 10. Wall Cut-out Area
5.2 SPLITTING HEATER FOR ASSISTED LIFTING AND POSITIONING
(Not applicable BX5 Models)
The SP4UN series heaters can be split for ease of installation.
5.2.1 SP4 Universal Heater
a. Remove the lid (four screws).
b. Disconnect the gas valve, overheat/pressure switch loom, igniter and flame sensor from the PCB.
c. Disconnect the flue pipe.
d. Remove the screws fastening the fan cabinet tabs to the heat exchanger cabinet. These are located at the top
of the heat exchanger cabinet on the heater split line.
e. Tilt the fan cabinet back and slide away from the heater cabinet.
NOTE
Protect the exposed looms and tabs from damage while the heater is split.
Ensure when reassembling the heater that all items are correctly installed and connected.
f. To assemble the heater, follow the procedure in the reverse order ensuring that:
• the two locating brackets at the base of the cabinets are fully engaged, and
• all switches, the gas valve and the flue pipe are correctly installed.

Rinnai 19 Ducted Gas Heater IM
5.3 INTERNAL INSTALLATIONS
SP4UN series heaters that are installed in the roof or beneath the floor shall comply with the following guidelines
and AS/NZS 5601.
5.3.1 Installation in the Roof Space
• The area under the heater must be capable of supporting the additional load, without causing deformation of
any part of the building structure.
• The appliance must be accessible by means of fixed access, a normal ladder or steps.
• A passage of 600mm wide must be provided between the roof access opening and the heater.
• This passage must have a suitable walkway of at least 19mm thick particle board or equivalent.
• A permanent level platform must be provided beneath the heater and this platform area must extend 750mm out
from the controls access panel side and fan motor access panel side/s for the entire length of the heater.
• The air gap created between the base of the heater and the platform by the heater’s legs must be maintained.
• Permanent artificial lighting must be provided at the heater, with the switch located at the roof access opening.
• If a lay-down kit is used the supporting platform must be covered with a fire resistant material.
5.3.2 Installation Beneath the Floor
• There must be a minimum clearance of 200mm between any part of the appliance and the lowest part of the
floor structure. In addition to this, refer to Service Clearances 3.3 (internal) or (external).
• The heater must be located within 2m of the access opening, or with a minimum clearance of 1.2m between the
lowest part of the floor structure and ground level, maintained from the access opening to the heater.
• All under floor installations must be on a level concrete base (50mm thick), and provision made to drain any
condensate, seepage or ground water away from the heater.
• Permanent artificial lighting must be provided at the heater with the switch located at the access opening.
• Lateral (horizontal) flues may be installed in accordance with AS/NZS 5601, ensuring that the lateral flue section
has a minimum rise of a 20mm per metre of lateral run.
• The flue must be terminated outside the building in accordance with AS/NZS 5601. For SP4UN series heaters,
termination can be performed using a remote terminal. Refer to para 6.1.3.
5.3.3 Ventilation Calculations
For installation of universal heaters in a room, enclosure, residential garage, or plant room with natural ventilation
conditions, ensure adequate ventilation is available by utilising the following formulae:
Properties Approved for Construction prior to 31st March 2014
a. Determine if the rating per cubic metre of the space is greater than 3MJ/hr.
Example:
Unit rating (Ur) = 120MJ/hr
Room volume (Rv) = 1m x 1m x 2.4m = 2.4m3
Ur/Rv = 120/2.4 = 50 MJ/hr per m3
As the result is greater than 3 MJ/hr per cubic metre of the space, additional ventilation is required.
b. Two permanent openings are required, each equivalent in area to the determined value A. The lower vent shall
be located close to the floor or at burner level. The upper vent shall be located at or above the top of the unit.
The two openings may be combined as long as the above conditions are met.
Determine free ventilation area using A = T x F, where:
A = minimum free ventilation area, mm2
T = total gas consumption of all gas appliances, MJ/hr. e.g. SP421UN = 90MJ/hr
F = factor (detailed in the table below)
HEATER POSITIONING

Rinnai 20 Ducted Gas Heater IM
Table 4. Ventilation F Factors
Gas appliance location Source of Ventilation Factor F
Gas appliance in a room or enclosure
Directly to outside* 300
Via an adjacent room 600
Gas appliance in a plant room
Directly to outside* 150
Via an adjacent room 300
Gas appliance in a residential garage Directly to outside* 300
* Directly to outside means through an external wall to outside, into a cavity vented to outside,
into an underfloor space vented to outside, or into a roof space vented to outside.
Properties Approved for Construction after 31st March 2014
c. Determine if the rating per cubic metre of the space is greater than 0.4 MJ/hr.
Example:
Unit rating (Ur) = 120MJ/hr
Room volume (Rv) = 1m x 1m x 2.4m = 2.4m3
Ur/Rv = 120/2.4 = 50 MJ/hr per m3
As the result is greater than 0.4 MJ/hr per cubic metre of the space, additional ventilation is required.
Refer to AS/NZS 5601 for natural ventilation requirements.
NOTE
For New Zealand ventilation requirements and all other applications, e.g. Mechanical Ventilation,
refer AS/NZS 5601.
5.4 EXTERNAL INSTALLATIONS
SP4 Universal and BX5 models can be installed outside of the house. For an installation under a house floor, an
SP4 Universal model should be chosen.
All heaters that are installed externally on the ground should be installed on a level concrete base or pad. If the
heater is to be installed in an elevated position or on a roof, the installation shall comply with AS/NZS 5601. It must
be secured to prevent movement and it must have adequate provision for service access.
5.4.1 SP4UN – Installation of Flashing
For installation details refer to the instructions supplied with associated flashing kit.
NOTE
To allow the heater to be moved out from the wall such as for servicing, it is important to provide
additional length in the ducting connected to the pops.
HEATER POSITIONING