rba RBA1882-100-001 Manual
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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RBA1882-100-001 'Nautilus' Dual Flush Valve Incl Large Mounting Plate
RBA1882-100-002 'Nautilus' Dual Flush Valve Incl Small Mounting Plate
RBA1882-100-003 'Nautilus' Dual Flush Valve Incl Small White Mounting Plate
RBA1882-100-005 'Nautilus' Dual Flush Valve Incl Small Black Mounting Plate
RBA1882-100-007 'Nautilus' Accessible Dual Flush Valve Incl Large Mounting Plate
RBA1882-100-008 'Nautilus' Dual Flush Valve Incl Indicator Rings, No Plate, Tile Fixed
AS 1172.2
W/M-40239
Global-Mark.com.au
Sourced/ Supplied under QMS
MODELS ‘NAUTILUS’ WC ELECTRONIC DUAL WC FLUSH VALVE,
MAINS PRESSURE
As improvements in the design and performance of RBA products are continuous, specications may be subject to change without notice.
The illustrations and descriptions herein are applicable to production as of the date of this Installation Instructions Sheet. Revised 12/22 © 2022 by RBA Group II/Model RBA1882-100-Series/1222
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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Table of Contents
1.0 Technical Requirements: Pg. 3
1.1 Hydraulic Requirements: Pg. 3
1.2 Electrical Requirements: Pg. 3
2.0 Components: Pg. 4
RBA1882-100-001 Pg. 4
RBA1882-100-002 Pg. 5
RBA1882-100-003 Pg. 6
RBA1882-100-005 Pg. 7
RBA1882-100-007 Pg. 8
RBA1882-100-008 Pg. 9
2.1 Installation of the Flush Valve Assembly: Pg. 10
2.2 Installing the controller Pg. 11
2.3 Controller Settings & Runtime Pg. 12
3.0 Installation of the Flush Valve Pg. 13
RBA1882-100-001 Pg. 13
RBA1882-100-002 Pg. 14
RBA1882-100-003 Pg. 15
RBA1882-100-005 Pg. 15
RBA1882-100-008 Pg. 16
3.1 AS1428.1 Installation: Pg. 17
4.0 Product Conguration Request: Pg. 18
5.0 Troubleshooting: Pg. 19- 20
6.0 Maintenance: Pg. 20
Spare Parts Pg. 20
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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1.0 Technical Requirements
Installation must be undertaken in accordance with the PCA (Plumbing Code of Australia) and AS/NZS3500.2, especially
concerning probable simultaneous demand and correct hydraulic water supply sizing where more than one ushing device
is serviced from that water supply. This product is factory set to the identied site conditions to comply with WELS 3 Star
6/3 ush volume as the default.
• Minimum 20mm pipe or equivalent water supply line size.
• Minimum supply pressure of 300kPa. Note: This valve is pre-set to deliver ush volumes of 6/3 L corresponding at 300
kPa. A product conguration sheet is available for site specic setting.
• A 40mm loose nut and liner to suit PVC is supplied with each assembly. Flush pipe is not supplied as a part of this
assembly.
• It is recommended that 2 x 45° bends may be installed in lieu of the 90° bend. For different congurations consult with
RBA Group for ush performance compatibility.
• The Pipe Interrupter (Vacuum Breaker) must be installed in the vertical position.
• Threaded brass to brass joints on this assembly have been made with Locseal.
• Water temperature range: 5 C - 35 C
1.1 Hydraulic Requirements
Inlet Connection: DN 25 min.
Outlet Connection: DN 40 to suit DWV
Water Supply Pressure: 300kPa min – 500kPa max.
Flush Pipe: DN40 (Supplied by others)
Flush Volume: WELS 3 Star 6/3L or 4 Star 4.5/3L
Flow Rate: 1.4 LPS
1.2 Electrical Requirements
Solenoid Cable: 3m, 24/0.20 0.75mm² Figure 8
Piezo Button: Stainless Steel, 3m Cable
Piezo Cable 5 Core twist connect 24awg
Transformer: 240VAC/24VAC, 3 AMP
Controller: 85mm [W] x 65mm [H] x 33mm [D]
Mains Power Supply: By Others
Warranty: 1 year
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Item # Part Number Description
1 x RBA1882-100 'Nautilus' Flush Valve Assembly
1 x RBA8012-999-727 T2 Controller for 3 Terminal WC's, 3Amp Transformer Power Supply & Plate Assembly
1 x RBA8010-999-010 Stainless Steel Piezo WC Full Flush
1 x RBA8010-999-011 Stainless Steel Piezo WC Half Flush
1 x RBA1880-999-023 Large Flush Valve Plate, Recess Kit
1 x RBA7125-999-010 3m, 24/0.20 0.75mm² Figure 8
2.0 Components
RBA1882-100-501
'Nautilus' Dual Flush Valve Incl Large, Stainless Steel Mounting Plate
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Item # Part Number Description
1 x RBA1882-100 'Nautilus' Flush Valve Assembly
1 x RBA8012-999-727 T2 Controller for 3 Terminal WC's, 3Amp Transformer Power Supply & Plate Assembly
1 x RBA8010-999-010 Stainless Steel Piezo WC Full Flush
1 x RBA8010-999-011 Stainless Steel Piezo WC Half Flush
1 x RBA1880-999-023 Large Flush Valve Plate, Reces Kit
1 x RBA7125-999-010 3m, 24/0.20 0.75mm² Figure 8
RBA1882-100-002
'Nautilus' Dual Flush Valve Incl Small, Stainless Steel Mounting Plate
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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Item # Part Number Description
1 x RBA1882-100 'Nautilus' Flush Valve Assembly
1 x RBA8012-999-727 T2 Controller for 3 Terminal WC's, 3Amp Transformer Power Supply & Plate Assembly
1 x RBA1880-99-005 Small White Acrylic Flush Valve Plate
2 x RBA8010-999-003 Stainless Steel Piezo - no etchings chamfer
1 x RBA7125-999-010 3m, 24/0.20 0.75mm² Figure 8
RBA1882-100-003
'Nautilus' Dual Flush Valve Incl Small, White Mounting Plate
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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Item # Part Number Description
1 x RBA1882-100 'Nautilus' Flush Valve Assembly
1 x RBA8012-999-727 T2 Controller for 3 Terminal WC's, 3Amp Transformer Power Supply & Plate Assembly
1 x RBA1880-99-005 Small White Acrylic Flush Valve Plate
2 x RBA8010-999-003 Stainless Steel Piezo - no etchings chamfer
1 x RBA7125-999-010 3m, 24/0.20 0.75mm² Figure 8
RBA1882-100-005
'Nautilus' Dual Flush Valve Incl Small, Black Mounting Plate
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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Item # Part Number Description
1 x RBA1883-100 'Nautilus' Flush Valve Assembly
1 x RBA8012-999-727 T2 Controller for 3 Terminal WC's, 3 Amp Transformer Power Pack & Plate Assembly
1 x RBA1880-999-025 Large SS Flush Valve Plate & Recess Kit to AS1428.1
1 x RBA8010-999-010 Stainless Steel Piezo WC Full Flush
1 x RBA8010-999-011 Stainless Steel Piezo WC Half Flush
1 x RBA7125-999-010 3m, 24/0.20 0.75mm² Figure 8
RBA1882-100-007
'Nautilus' Accessible Dual Flush Valve Incl Large Mounting Plate
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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Item # Part Number Description
1 x RBA1883-100 'Nautilus' Flush Valve Assembly
1 x RBA8012-999-727 T2 Controller for 3 Terminal WC's, 3 Amp Transformer Power Pack & Plate Assembly
1 x RBA8012-999-002 Half/Full Flush Indicator Rings Kit
2 x RBA8012-999-003 SS Peizo, no etchings, no chamfer
1 x RBA7125-999-010 3m, 24/0.20 0.75mm² Figure 8
RBA1882-100-008
'Nautilus' Dual Flush Valve Incl Flush Indicator Rings, No Plate
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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2.1 Installing the Flush Valve Assembly
• Identify that all components are in the packaging. Three components are included in the packaging:
i) An isolating ball valve and strainer combination with tted 'Nautilus' Solenoid;
ii) Connecting nut and vacuum breaker assembly;
iii) PVC loose nut cap and lining.
• Flush the water supply lines thoroughly to remove any dirt or debris.
• Fit the ush valve in the required position maintaining a minimum 700mm distance between the outlet of the vacuum
breaker and the centre line of the lush pipe connected to the WC pan inlet.
• It is recommended that a loose nut or union connection be used at the inlet ball valve to facilitate ease of assembly
removal should this be required.
• Once installation heights have been established, t the Connecting Nut and vacuum breaker assembly to the ball valve
and 'Nautilus' Solenoid.
• Fit the PVC cap and lining to the ush pipe, tightening the loose nut onto the male outlet thread of the vacuum breaker.
Ensure rubber seal is seated on PVC pipe.
• Connect ush pipe to the WC xture.
• Turn water supply on and check for leaks. Note: A small amount of water may pass through the 'Nautilus' Solenoid
valve when power is not connected to it. The correct function of the 'Nautilus' solenoid should see pressure equalise
across the diaphragm causing the valve to remain closed.
• Connect 'Nautilus' Solenoid to the piezo’s for half and full ush along with Electronic Controller and Power Pack is
required to complete the installation
• Once commissioning has been completed, test the system by pressing the half ush piezo and checking that the valve
closes off.
• Repeat this test with the full ush piezo by pressing the full ush piezo and checking that the valve closes off.
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2.2 Installing The Controller
• Mount controller on wall so piezo wire can easily
reach unit.
• Make electrical connections: Connect wires of
• Half Flush piezo to the GND and SIG terminals
• of Sensor A. Connect wires of Full Flush piezo to
• the GND and SIG terminals of Sensor B. Connect
• Solenoid valve to Valve A. Connect the Power
• Pack to Power 24VAC, + and Nterminals
• Din-plug wiring connection has been completed
in house to allow for batch test release. The unit
is low voltage, 24VAC, so polarity is not critical.
Ensure cable is wired to neutral and active
terminals.
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2.3 Controller Settings & Runtime
Output A (1/2 Flush) Dial A Output A (Full Flush) Dial B
Position Time (s) Position Time (s) Position Time (s) Position Time (s)
0 0.2 8 1.0 0 1.5 8 2.3
1 0.3 9 1.1 1 1.6 9 2.4
2 0.4 A 1.2 2 1.7 A 2.5
3 0.5 B 1.3 3 1.8 B 2.6
4 0.6 C 1.4 4 1.9 C 2.7
5 0.7 D 1.5 5 2.0 D 2.8
6 0.8 E 1.6 6 2.1 E 2.9
7 0.9 F 1.7 7 2.2 F 3.0
Time Settings can be changed by using a small at bladed screwdriver so that the arrow points to a number or letter, as per
the above table.
Dial A settings adjust Half Flush Timing and Dial B settings adjust Full Flush Timing.
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FFL
275
425
FFL
40mm FLUSH PIPE
(BY OTHERS)
Min. 700 335
73
FRONT ELEVATION
SIDE ELEVATION
3.0 Installation
RBA1882-100-001 Installation
Rough Wall Opening for plate: 230mm W x 410mm H x 45mm D
Note: When mounting ush valve assembly in the ceiling or restricted space, vacuum breaker must be installed in the
vertical plane. Consult RBA or a qualied hydraulic consultant for advice.
• Fit the ush valve in the required position maintaining a minimum 700mm distance between the outlet of the vacuum
breaker and the centre line of the ush pipe connected to the WC pan inlet.
• Remove face plate from mounting bracket.
• Install mounting bracket into noggins. Ensure xing height allows direct access to Flush Valve as shown in above
image.
• Install Piezo buttons in face plate.
• Make electrical connections: Connect Half Flush piezo to Sensor A. Connect Full Flush piezo to Sensor B. Connect
Solenoid valve to Valve A. Connect the Power Pack to Power 24VAC.
• Secure plate to mounting bracket using screws provided.
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FFL
Min. 700 335
FFL
40mm
FLUSH PIPE
Min. 700 335
RBA1882-100-002 Installation
Rough Wall Opening for plate: 115mm W x 60mm H x 45mm D
Note: When mounting ush valve assembly in the ceiling or restricted space, vacuum breaker must be installed in the
vertical plane.
• Fit the ush valve in the required position maintaining a minimum 700mm distance between the outlet of the vacuum
breaker and the centre line of the ush pipe connected to the WC pan inlet.
• Remove face plate from mounting bracket.
• Install mounting bracket into noggins.
• Install Piezo buttons in face plate.
• Make electrical connections: Connect Half Flush piezo to Sensor A. Connect Full Flush piezo to Sensor B. Connect
Solenoid valve to Valve A. Connect the Power Pack to Power 24VAC.
• Secure plate to mounting bracket using screws provided.
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RBA1882-100-003 & -005 Installation
Rough Wall Opening for plate: 85mm W x 38mm H x 25mm D
Note: When mounting ush valve assembly in the ceiling or restricted space, vacuum breaker must be installed in the
vertical plane and consult RBA or a qualied hydraulic consultant for advice.
• Fit the ush valve in the required position maintaining a minimum 700mm distance between the outlet of the vacuum
breaker and the centre line of the ush pipe connected to the WC pan inlet.
• Install Piezo buttons in face plate.
• Install face plate into wall.
• Make electrical connections: Connect Half Flush piezo to Sensor A. Connect Full Flush piezo to Sensor B. Connect
Solenoid valve to Valve A. Connect the Power Pack to Power 24VAC.
FFL
Min. 700 335
FFL
40mm
FLUSH PIPE
Min. 700 335
73
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RBA1882-100-008 Installation
Rough Wall Opening for button assembly: 23mm Dia
Note: When mounting ush valve assembly in the ceiling or restricted space, vacuum breaker must be installed in the
vertical plane . Consult RBA or a qualied hydraulic consultant for advice.
• Assemble Piezo button and Flush ring escutcheon on to Piezo. Ensure all components are securely fastened.
• Pull Piezo cable through conduit from the bottom to the ceiling space where controller is to be mounted.
• Mount Piezo/Indicator ring assembly on the wall with silicone.
• Make electrical connections: Connect Half Flush piezo to Sensor A. Connect Full Flush piezo to Sensor B. Connect
Solenoid valve to Valve A. Connect the Power Pack to Power 24VAC.
FFL
335Min. 700
184
FFL
40mm
FLUSH PIPE (Supplied by others)
23mmøPENETRATION
FOR PIEZO BUTTON
73
Min. 700 335
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3.1 AS1428.1 Installation
RBA1882-100-007
Rough Wall Opening for plate:
• Fit the ush valve in the required position maintaining a minimum 700mm distance between the outlet of the vacuum
breaker and the centre line of the ush pipe connected to the WC pan inlet.
• Remove face plate from mounting bracket.
• Install mounting bracket into noggins. Ensure xing height allows direct access to Flush Valve as shown in image
above.
• Install Piezo buttons in face plate.
• Make electrical connections: Connect Half Flush piezo to Sensor A. Connect Full Flush piezo to Sensor B. Connect
Solenoid valve to Valve A. Connect the Power Pack to Power 24VAC.
425
275
60
980
600
1100 MAX.
C
L
500 MAX.
ALTERNATIVE
POSITION ON
CENTRE-LINE BACK WALL
ZONE POSITION
OF FLUSHING
CONTROL
1040
SIDE WALL
FFL
40mm FLUSH PIPE
(BY OTHERS)
MIN. 600
800
TYP. 390 - 410
600
1100 MAX.
C
L
300 MAX.300 MAX.
SIDE WALL
ZONE POSITION
OF FLUSHING
CONTROL
335
73
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4.0 Has the product conguration sheet been submitted, if required?
Product Conguration Request:
Note: Default factory setting for the RBA1882-100 Series is as WELS 3 Star 6/3 ush volume at 300kPa inlet pressure. This
product may be congured to suit water supply pressures from 300 – 500kPa and WELS Star ratings of 3 Star and 4 Star to
suit comparable Watermark and WELS rated WC pans.
Please complete the following details for custom conguration of the RBA1882-100 to suit site conditions and WC pan ush
volume choice:
Customer Name: ………………………………………………………………………………
Customer Number: …………………………………………………………………………….
Delivery Address: ……………………………………………………………………………….
Project Name or Site Address of Installation: ……………………………………………………………………………..
…………………………………………………………………………………………………
Quantity of RBA1882-100 Required: ………………………………………………..
Water Supply Inlet Pressure on site: ………………………………………………….
WELS Rating Required to match WC pans: …………………………………………
I request that the RBA1882-100’s are congured for this project and to suit the site information as stated above.
Name: ………………………………………………………………………………………
Email: ………………………………………………………………………………………
Mobile: ……………………………………………………………………………………
Signature
………………………………
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5.0 Troubleshooting
Problem Probable Cause Solution
Piezo button pressed – no water ow
Loose connection on leads connected
to Master-Trol Reconnect lead connections.
Piezo switch not working Replace piezo switch.Replace piezo switch.
Filter blocked Remove debris from ball valve lterRemove debris from ball valve lter
CCheck that water is available to the
inlet water supply.
Water supply pressure issue
Check inlet water supply pressure
and that a minimum of 300kPa and a
maximum of 500kPa is available.
Water continues to run from the ush
valve
Solenoid seat possibly fouled by debris
or scale
Solate the water supply and remove the
solenoid valve. Take out the plunger
and spring assembly and clean them
using a soft brush. Use scale remover
if required. Reassemble components
ensuring the spring is in the vertical
position and reinstall the solenoid.
Filter blocked Remove debris from ball valve lter
Check inlet water supply.
Water supply pressure issue
Check inlet water supply pressure
and that a minimum of 300kPa and a
maximum of 500kPa is available.
Flush pattern not covering the internal
section of the WC pan
Water supply pressure issue
Check inlet water supply pressure and
that a minimum of 300kPa and
a maximum of 500kPa is available.
Incorrect water supply pipe size
Ensure that a minimum 25mm water
supply is connected to the ush valve.
If multiple ush valves are supplied off
the same service, refer to the hydraulic
design and subsequent pipe sizing
to allow for probable simultaneous
demand.
WC pan ush volume issue
Ensure the WELS rating of the WC pan
is comparable to the WELS rating of
the ush valve.
Incorrect timing setting of ush valve
at stated inlet pressure.
Continued..
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Troubleshooting
Problem Probable Cause Solution
Insufcient water delivered to WC pan
Water supply pressure issue
Check inlet water supply pressure and
that a minimum of 300kPa and
a maximum of 500kPa is available.
Incorrect water supply pipe size
Ensure that a minimum 25mm water
supply is connected to the ush valve.
If multiple ush valves are supplied off
the same service, refer to the hydraulic
design and subsequent pipe sizing
to allow for probable simultaneous
demand.
WC pan ush volume issue
Ensure the WELS rating of the WC pan
is comparable to the WELS rating of
the ush valve.
Incorrect timing setting of ush valve
Master-Trol at stated inlet pressure.
'
6.0 Maintenance
Spare Parts
Note: This product should be installed, by suitably qualied persons, in a t for purpose application, to suitable materials,
using suitable xings and comply with any relevant codes. It should be inspected periodically for signs of wear and tear that
may affect performance or safety.
Dimensions are subject to manufacturer’s tolerance of +/-10mm. Rough-in should be completed with each xture.
Important: Installation Instructions are subject to change without notice. Please visit our websites for latest revision.
RBA Code No. Description
RBA8012-999-004 T2 Controller [2020]
RBA7125-999-010 3m, 24/0.20 0.75mm² Figure 8
RBA8010-999-003 Piezo [3m tail]
RBA1882-100 'Nautilus' Flush Valve assembly
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