Rheem TB Series Technical Document

This water heater must be installed and serviced by an authorised person.
Please leave this guide with the householder.
Owners Guide
and
Installation Instructions
TB3/5 Boiling Water Unit

2
Notice to Victorian Customers from the
Victorian Plumbing Industry Commission.
This water heater must be installed by a licensed person as required by the
Victorian Building Act 1993.
Only a licensed person will give you a Compliance Certificate, showing that
the work complies with all the relevant standards. Only a licensed person will
have insurance protecting their workmanship for 6 years. Make sure you use
a licensed person to install this water heater and ask for your Compliance
Certificate.

3
CONTENTS
RESPONSIBLE OFFICER –We recommend reading pages 4 to 16.
The other pages are intended for the installer but may be of interest.
CONTENTS...................................................................................3
ABOUT YOUR BOILING WATER UNIT.......................................4
HOW YOUR BOILING WATER UNIT WORKS............................6
OPERATING THE TAP...............................................................13
CHANGING THE WATER FILTER.............................................14
SAVE A SERVICE CALL............................................................15
INSTALLATION ..........................................................................17
ELECTRICAL CONNECTION.....................................................22
COMMISSIONING.......................................................................23
DRAINING THE BOILING WATER UNIT...................................23
WATER SUPPLIES.....................................................................24
END OF LIFE WATER HEATER DISPOSAL.............................24
RHEEM BOILING WATER UNIT WARRANTY..........................26

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ABOUT YOUR BOILING WATER UNIT
INTRODUCTION
Thank you for choosing our Rheem TB Series Boiling Water Unit. Please take a
few minutes to read this booklet because it contains important information
about the correct installation and operation of your Rheem Boiling Water Unit.
The Rheem Boiling Water Unit supplies both boiling water and cold filtered
water. It is made from high quality copper and is designed to be installed
indoors, under sinks and in cupboards. The Rheem Boiling Water Unit is
supplied with all the required safety valving for installation (not including the
isolation valve prior to the water heater). Your Rheem Boiling Water Unit is
designed to supply boiling water to a purpose built Rheem boiling water
dispensing tap. As an option your Rheem Boiling Water Unit can also be
combined with a Rheem Water Chiller for total water solutions at the sink.
WARNING
This boiling water unit is only intended to be operated by persons who have the
experience or the knowledge and the capabilities to do so. This boiling water
unit is not intended to be operated by persons with reduced physical, sensory
or mental capabilities i.e. the infirm, or by children. Children should be
supervised to ensure they do not interfere with the boiling water unit.
This boiling water unit uses 230-240 V AC electrical power for operation of the
control systems and the electrically operated components. The removal of the
access cover(s) will expose 230-240 V wiring. They must only be removed by
an authorised or qualified person.
HOW HOT SHOULD THE WATER BE?
The system controls will operate to maintain a water temperature of near
boiling point within the boiling unit.
SAFETY
This boiling water unit is supplied with an over temperature cut-out on the
boiling element to prevent element burn out in the event of control failure.
This water heater is supplied with an integral safe tray with automatic shut off
device that complies with ATS 5200.476. A safe tray and/or safe waste are not
required for installation.
If the electrical supply cord to the water heater is damaged, it must be replaced
by an authorised person in order to avoid becoming a hazard. Phone your
nearest Rheem Service Department or Accredited Service Agent to arrange for
an inspection.
For extra electrical protection against power surges and spikes it is
recommended that the user install a surge protector prior to the boiling water
unit.
The warranty can become void if any of the installed safety devices are
tampered with or if the installation is not in accordance with these
instructions.

ABOUT YOUR BOILING WATER UNIT
5
TO TURN OFF THE BOILING WATER UNIT
This boiling water unit is supplied with a programmable timer. We recommend
the timer be used to conserve energy.
If it is necessary to turn off the boiling water unit:
Switch off the electrical supply at the isolating switch to the boiling water
unit.
Close the cold water isolation valve at the inlet to the boiling water unit.
TO TURN ON THE BOILING WATER UNIT
Open the cold water isolation valve fully on the cold water line to the boiling
water unit.
Switch on the electrical supply at the isolating switch to the boiling water
unit.
Note: The boiling water unit may not appear to turn on immediately when it is
first switched on as the electronic controller will automatically check the system
prior to allowing water into the boiling water unit (this could be up to 10
seconds).
On initial start up, this boiling water unit automatically runs through a set-up
cycle to detect the boiling point of water. During this cycle steam may discharge
from the vent pipe for a short time. This set-up cycle will take up to 17 minutes
depending on unit, and when completed (boiling point detected) the unit will
commence incremental filling. It is important NOT to operate the tap during the
set-up cycle because it may affect the operating temperature of the unit.
IS THIS BOILING WATER UNIT INSTALLED CORRECTLY?
Installation requirements are shown under Installation on page 17. The boiling
water unit must be installed by an authorised person and the installation must
comply with National Standards AS/NZS 3500.4, AS/NZS 3000 and all local
codes and regulatory authority requirements. In New Zealand, the installation
must also conform to the New Zealand Building Code.
DOES THE WATER QUALITY AFFECT THE BOILING WATER UNIT?
The boiling water unit is suitable for most public water supplies, however some
water qualities may have detrimental effects on the boiling water unit and
fittings. If you are in a known harsh water area you must first read Water
Supplies on page 29. If you are not sure, have your water quality checked
against the conditions described on page 24.
HOW LONG WILL THE BOILING WATER UNIT LAST?
There are a number of factors that will affect the length of service the boiling
water unit will provide. These include the water quality, the water usage pattern
etc. However, your boiling water unit is supported by a comprehensive warranty
(refer “Warranty” on page 31).

6
HOW YOUR BOILING WATER UNIT WORKS
RHEEM BOILING WATER UNIT
The boiling water unit is designed to operate using mains water pressure by
connecting directly to the mains water supply. If the mains supply pressure in
your area exceeds 1000kPa a secondary pressure limiting valve must be fitted.
The supply pressure should be greater than 350 kPa for the Rheem Boiling
Water Unit to perform at its best. Pressure lower than this will affect the delivery
performance of the water chiller (if installed).
BOILING WATER
The Rheem Boiling Water Unit is electronically controlled to obtain the
maximum performance, and incorporates further safety devices to prevent over
temperature and over filling.
ELECTRONIC CONTROLLER & TIMER
Your Rheem boiling water unit incorporates smart heating software and an
electronic timer to obtain the best efficiency for the energy used. The electronic
timer allows the user to program when the unit is on or off and when the sleep
mode activates to save energy. Also the operator has the availability to indicate
and diagnose any system faults that occur without the need to unnecessarily
call for a service agent. (Refer “Setting the Timer” on page 7).
ENVIRONMENT
If a chiller unit is installed, at the end of the service life and prior to the chiller
being disposed of, a person qualified to work with refrigerants must recover the
refrigerant from within the sealed system. The refrigerant must not be vented to
atmosphere. Phone your nearest Rheem Service Department or Accredited
Service Agent to arrange for an inspection.
WATER FILTER
The Rheem Boiling Water Unit incorporates an integral water filter. The water
filter increases the quality of water by removing odours and particles. Over time
the water filter will clog up with sediment. We recommend that the water filter
be changed at least every 6 months. The Boiling Water Unit has a filter count
built into the software that lets the operator know when the filter is getting close
to its recommended life.
IMPORTANT
Rheem highly recommends that regular water filter cartridge changes are
carried out to ensure the system is performing to a high standard. If the
water filter is not regularly serviced and maintained on the recommended
intervals by Rheem, the water filter cartridge will block with the trapped
impurities, causing bacterial growth in the filter media and dramatically
reducing filtered water flow, affecting the operation of the filtered boiling
water unit. For more information, please call the Rheem service
department.

HOW YOUR BOILING WATER UNIT WORKS
7
SETTING THE TIMER
Your Rheem boiling water unit is supplied with a programmable 7 day timer
which allows the unit to operate in the most efficient fashion to suit your needs.
The timer also incorporates a sleep mode which can be set to automatically
shut the system down after a set period of time of no use, say after 6 hours. If a
Rheem chiller is included, the timer will also control the chiller functions. The
tap includes a safety lock to limit access to boiling water if required.
Timer Functions
A) Setting the Clock
B) Timer STD/AUTO
C) Set ON/OFF Times*
D) Set Sleep Delay Time*
E) Filter Life
F) Service Menu
G) Chiller Selection
H) Chiller Temp
I) Cold Tap Time
J) Hot Tap Time
K) Key Lock
* ON/OFF and Sleep Delay times operate in AUTO Mode.
To select a Timer Mode
Press the (Prog) button until the desired mode is displayed on the screen.
Press the (Accept) button to confirm selection. Pressing (Cancel) button at any
time returns the unit to the main menu. Any functions previously accepted will
be retained.
Note: The display will revert back to main menu from any mode if a button has
not been pressed for 1 minute.
A) SETTING THE CLOCK
Select the clock mode
(Prog>Clock>Accept)
Display Shows: “Set Clock Day”.
Press the (UP) button until the desired day appears on the screen and press
the (Accept) button to confirm selection.
Display Shows: “Set Clock HOUR”
Press the (UP) button until the desired hour (24 Hour Time) appears flashing
on the screen and press the (Accept) button to confirm selection.
Display Shows: “Set Clock MIN”
Press the (UP) button until the desired minute appears flashing on the screen.
Press the (Accept) button to confirm selection and the display reverts to the
main menu.

HOW YOUR BOILING WATER UNIT WORKS
8
B) Set Timer to STD/AUTO Mode
Select the Timer STD/AUTO mode (Prog>Timer STD/AUTO>Accept)
Display Shows: “STD”
Pressing the (UP) button alternates the “STD”/“AUTO” icons. STD operation
means that the unit operates 24 hours a day, Auto mode reverts the unit to
operate at the pre set times on the timer. Press the (Accept) button to confirm
selection and the display reverts to the main menu. If the timer is in AUTO
mode, pushing any Timer key or lever on the tap will reactivate the unit. The
unit will operate normally until the next programmed “Off” time.
C) TO SET ON/OFF TIMES
Select the Timer ON/OFF mode
(Prog>Set ON/OFF times>Accept)
Note: to set the unit to be in off mode for an entire day, set the “on” and “off”
times to be the same eg: On = 0:00 Off = 0:00
Display Shows: “SUN” “7:00 –7:00” “Set ON hour”.
Press the (UP) button until the desired hour appears on the screen and press
the (Accept) button to confirm selection.
Display Shows: “SUN” “7:00 –7:00” “Set ON minute”.
Press the (UP) button until the desired minute appears on the screen and press
the (Accept) button to confirm selection.
Display Shows: “SUN” “7:00 – 7:00” “Set OFF hour”.
Press the (UP) button until the desired hour appears on the screen and press the
(Accept) button to confirm selection.
Display Shows: “SUN” “7:00 – 7:00”“Set OFF Minute”.
Press the (UP) button until the desired minute appears on the screen and press the
(Accept) button to confirm selection and advance to the next day.
Display Shows: “MON” “7:30 –15:30” “Set ON hour”.
Note: Continue with same procedure for Monday through to Saturday.
D) TO SET SLEEP DELAY TIME.
Select the Sleep on/off mode (Prog>Sleep DelayTime>Accept)
Display Shows: “Sleep DelayTime” “OFF”.
The sleep function puts the unit in a standby mode after a user defined period.
The Sleep Delay will be factory set to OFF as the default setting. Pressing the
(UP) button increases the delay time up to 6 hours. Press the (Accept) button
to confirm selection and the display reverts to the main menu. The unit will go
into “Sleep” mode if it has not been used for the “Sleep Delay Time” period. To
exit “Sleep”, push any Timer key or lever on the tap. If you activate the Sleep
Delay Time we recommend that you also activate the Temp Show On/Off
function.

HOW YOUR BOILING WATER UNIT WORKS
9
E) FILTER LIFE
Select the Appropriate Filter Mode (Prog>Filter life>Accept)
i) Remaining Life
ii) Filter Reset
i) To Select Remaining Life mode
(Prog>Filter Life>Accept>Remaining Life)
Display Shows: “Remaining Life” “XXXX litres“
Press the (Cancel) or (Accept) button to revert back to the main menu.
ii) To Select the Filter Reset mode
(Prog> Filter Life >Accept>filter reset>Accept)
Display Shows: “Filter Reset”
Press the (Accept) button to confirm selection at which time you are
prompted “Are you sure?”. Press (Accept) once more and,
Display Shows: “Set Filter Life” “XXXXLitres”.
Pressing the (UP) button scrolls from the filter OFF selection (this turns the
filter count off if a filter is not installed with the boiling water unit) up to
12000 litres. We recommend a default value of 4000 litres, until the user
knows the filter will last longer. Press the (Accept) button to confirm
selection and the display reverts to the Filter menu.
F) SERVICE MENU
Select Appropriate Service Mode (Prog>Service>Accept)
1) Error Codes
2) Boiling Temp
3) Chiller Temp* (only shown when chiller is attached)
4) Calib Reset
5) Temp Override
6) Software Version
7) Temp Show ON/OFF
8) TB Treq
1) Product Error Codes
(Prog>Service>Accept>Error Codes)
This function allows easy identification of problems occurring with the unit
by service technicians.
Error
Code
Error
Code
Hot Thermistor O/C, S/C
A
Low Level Probe Fault
H
Cold Thermistor O/C, S/C
B
High Level Probe Fault
J
Triac S/C
C
Compressor Fault
K
Leak Detected
D
Water Heating Fault
L
Expired Filter
E
Internal software reset,
No action required
M
Calibration Time Out
G
Excessive Temperature Rise
N

HOW YOUR BOILING WATER UNIT WORKS
10
2) For Boiling Unit Display Temp mode
(Prog>Service>Accept>Boiling Temp)
Display Shows: “XXX ˚C“
This function displays the current boiling water temperature.
Press the (Cancel) button to revert back to the main menu.
3) For Chiller Unit Display Temp mode
(Prog>Service>Accept>Chiller Temp)
Display Shows: “XXX ˚C“
This function displays the current chilled water temperature.
Press the (Cancel) button to revert back to the main menu.
4) For Calibration Reset mode
(Prog>Service>Accept>Calib.Reset>Accept)
Display Shows: “Calib. Reset“
This function recalibrates the boiling water unit to boiling point. Press the
(Accept) button to recalibrate the boiling point. Press (Accept) again at the
“Are You Sure?”prompt. Press the (Cancel) button to revert back to the
Main menu. The timer will now display “Calibrating Do Not Interrupt”.
When calibration is complete the timer display will revert back to the main
menu.
5) For Temp Override mode
(Prog>Service>Accept>Temp Override>Accept)
This function allows the user to manually set the required boiling water
temperature.
Display Shows: “XX°C“
Press the (UP) button until the desired temperature is shown (range is from
70°C to 99°C). Press the (Accept) button to activate the selection, then the
words “are you sure?” will flash on the screen. Press the (Accept) button
to confirm your selection. The words “Calibrating Do Not Interrupt” may
appear for a short period. This is because the unit is checking that it is able
to reach the temperature you are requiring. Once the unit has finished
checking, the screen will return to normal.
6) To Display the Software Version
(Prog>Service>Accept>Software Version>Accept)
This displays both the Timer and Controller software versions. The top digits
pertain to the timer software version, and the lower digits pertain to the
controller software version.

HOW YOUR BOILING WATER UNIT WORKS
11
7) Temp Show On/Off
(Prog>Service>Accept>TempShow ON/OFF)
Display Shows: “Hot XXX°C“ If no chiller , “HotXXX ColdXX“ If chiller
attached.
This function allows the temperature of the water within the boiling water
unit (and chiller if attached) to be displayed permanently on the screen.
Press the (UP) button to switch modes between ON and OFF.
Press (Accept) to confirm and the display reverts back to the service menu.
8) TB Treq
(Prog>Service>Accept>TB Treq
This function allows the user to see what Temperature the unit calibrated to,
and the subsequent required temperature the unit is required to be
maintained at.
Under the letters TB a figure will be displayed. This temperature is the
boiling water calibration temperature. Under the letters Treq a figure will
also be displayed, and this is the temperature the unit will maintain the
water to.
G) CHILLER SELECTION
Select Appropriate Chiller Mode (Prog>Chiller Selection>Accept)
i. Auto
ii. No Chiller
iii. Push Thru. Chil
iv. Pumped Chiller
i) To Select Auto mode
(Prog>Chiller Selection>Accept>Auto)
This allows the unit to automatically detect if any chiller is attached to the
unit.
Press (Accept) to confirm and the display reverts back to the service menu.
ii) To Select No Chiller mode
(Prog>Chiller Selection>Accept>No Chiller)
This allows the user to attach a stand alone chiller to the product. By
activating the No Chiller mode, the filter count is updated to include chilled
water.
Press (Accept) to confirm and the display reverts back to the service menu.
iii) To Select Push Thru. Chil mode
(Prog>Chiller Selection>Accept>Push Thru. Chil)
If the unit incorrectly senses the appropriate chiller, the user can manually
set the unit to default to a Push Through Chiller.
Press (Accept) to confirm and the display reverts back to the service menu.
iv) To Select Pumped Chiller mode
(Prog>Chiller Selection>Accept>Pumped Chiller)

12
If the unit incorrectly senses the appropriate chiller, the user can manually set
the unit to default to a Pumped Chiller.
Press (Accept) to confirm and the display reverts back to the service menu.
H) CHILLER TEMP
Select Appropriate Chiller Temperature (Prog>Chiller temp>Accept)
Display Shows: “XX ˚C“
Press the (UP) button to scroll from 5°C to 15°C.
Press (Accept) to confirm and the display reverts back to the service menu.
I) COLD TAP TIME
Select Appropriate Cold Tap Time (Prog>Cold Tap Time>Accept)
Display Shows: “XXs“
This allows the user to define the maximum volume of water that can be drawn
off the unit in one pour.
Press the (UP) button to scroll from 5s to 60s.
Press (Accept) to confirm and the display reverts back to the service menu.
J) HOT TAP TIME
Select Appropriate Hot Tap Time (Prog>Hot Tap Time>Accept)
Display Shows: “XXs“
This allows the user to define the maximum volume of water that can be drawn
off the unit in one pour.
Press the (UP) button to scroll from 5s to 20s.
Press (Accept) to confirm and the display reverts back to the service menu.
K) KEY LOCK
Select Key Lock (Prog>Key Lock)
Display Shows: “Key Lock“
This allows the user to lock the timer keys to prevent tampering.
Press the (Accept) button to confirm selection and the display will now show
“Key Lock Enable” Press the (Accept) button again to reconfirm selection and
the display will reverts to the main menu.
To unlock the Key Lock function, the ” and “Up” buttons must be pushed
simultaneously for 10 seconds.

13
OPERATING THE TAP
The boiling unit Tap is used to dispense boiling water and cold/chilled/filtered
water. The Tap contains 2 lever switches (hot and cold), a safety lock button
(child safety lock) and 2 LED’s (Orange, Green). When operating the tap, every
20 seconds the boiling or cold water will stop. This is to prevent the tap being
turned on permanently.
TAP LEVERS
The Tap houses two levers. The hot lever has a red insert, the cold has a blue
insert.
To operate the levers you can,
a) Pull the lever up to allow for hands free filling of large containers, or
b) Push and hold the lever down for quick cup fills.
SAFETY LOCK BUTTON
The tap also incorporates a safety lock button. To activate and de-activate the
button you must push it for 10 seconds. When the safety lock is activated, the
word SAFETY will light up in Red on the top of the tap.
To operate the boiling water tap when the safety lock is on, press and hold the
safety button whilst activating the boiling water lever.
TAP LED’S
The Tap contains 2 LED’s on the top (where the safety lock button is
positioned).
The Green LED (Ready) indicates the status of the boiling water unit
temperature. If the Green LED is flashing, the boiling unit is below the set
operating temperature. Wait until the green LED stops flashing, or you may get
a cup of boiling water below the optimum temperature.
The Orange LED (Filter) if flashing, indicates the water filter (if installed)
should be replaced. See Setting the Timer, Section E on page 9 for resetting
the filter.
Figure 1: Tap Layout
Hot Lever
Cold Lever
Safety Lock Button
Green LED (Ready)
Orange LED (Filter)
Blue Insert
Red Insert

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CHANGING THE WATER FILTER
IF A WATER CHILLER IS CONNECTED PROGRESS THROUGH ALL STEPS
IF A WATER CHILLER IS NOT CONNECTED DO STEPS 1,2,4,5,6,7,9,10 & 11
Step 1: Isolate the water supply to the boiling water unit.
Step 2: Isolate the boiling water unit from the electricity supply.
Step 3: Disconnect all electrical chiller connections to the boiling water unit
Step 6: Prepare new filter by removing the plastic wrap and taking off the top
plastic cover covering the inlet to the filter.
Step 7: Replace water filter by reversing steps 4 and 5.
Step 8: Disconnect Chilled Water Outlet Pipe from the Water Chiller (if
connected) and connect it to the Chilled Water Supply Connector on
boiling unit, using supplied ¼” -9mm John Guest spigot fitting supplied
with replacement filter.
Step 9: Turn water on to the boiling water unit.
Step 10: Turn the electricity to the unit back on.
Step 11: Flush the new water filter by activating the cold button on the tap for a
minimum of 5 minutes (note: the continuous draw off time can be
increased to 1 minute intervals (see Section I page 12)
Step 12: Once flushing is complete, put the Chilled Water Outlet Pipe back onto
the outlet connection on the chiller, and connect the Chiller Inlet Supply
Pipe back onto the Chilled Water Supply Connector.
Step 13: Reconnect all electrical connections from the chiller back onto the boiling
water unit.
Step 14: Check unit is functioning correctly and dispose of the old filter cartridge
responsibly.
Step 4: Unlock the filter from the housing by
rotating the filter body a quarter turn clockwise.
Step 5: Remove filter by lowering from housing.
Ensure that minimal water is spilled within the
boiling unit when removing filter.

15
SAVE A SERVICE CALL
Check the items below before making a service call. You will be charged for
attending to any condition or fault that is not related to manufacture or failure of
a part.
NOT ENOUGH (OR NO) BOILING WATER
Is the electricity switched on?
Inspect the wall power socket to see if it is switched on. Also check the fuse
or circuit breaker at the switchboard to see if it is tripped.
Is the timer in the off period?
If the timer has been set to turn off and the unit is below the optimum
delivery temperature, the green LED will flash, press the hot lever on the
boiling water tap and the unit will re-activate. Wait a couple of minutes, and
the unit should be back up to temperature (green LED on the tap should
change to be continuously on)
Is the leak sensor picking up there is a fault with the unit?
There is a leak sensor integrated within the boiling water unit that detects if
there is a water leak (error code D displayed on the timer screen) within the
boiling water unit. Phone your nearest Rheem Service Department or
Accredited Service Agent to arrange for an inspection.
If there is a fault with the unit an error code should be displayed on the front
of the unit (see page 9 Section F, 1). If this occurs phone your nearest
Rheem Service Department or Accredited Service Agent to resolve any
problems with the unit..
WATER NOT HOT ENOUGH?
Heavy usage
You may find that due to heavy boiling water usage the water temperature
may be lower than normally expected due to insufficient heating time being
allowed.
High altitude
The boiling water unit is fitted with automatic altitude calibration to prevent
the water from continually boiling, which is energy inefficient. Different
altitudes will cause the unit to boil at different temperatures. If you believe
the water temperature is not hot enough, recalibrate the unit (see page 10
section 4).

16
SAVE A SERVICE CALL
HIGH ELECTRICITY BILLS
Should you at any time, feel your electricity account is too high, we suggest you
check the following points:
This water heater is supplied with a programmable timer and sleep mode.
Check to see if these features have been activated. Refer “Setting the
Timer” on page 7.
UNIT WILL NOT SWITCH OFF
The electronic timer will only switch the unit on or off when it is in “Auto” mode
(See section B on page 7) otherwise the unit will operate 24 hours a day 7 days
a week.
NO WATER COMING OUT OF THE TAP
There may have been a large draw off prior. Wait a minute for the unit to fill
enough for you to get water out. If water will still not come out of the tap check
the timer screen if there is an error message and call your nearest Rheem
Service Department or Accredited Service Agent to resolve any problems with
the unit.
LOW CHILLED WATER FLOW
Low supply pressure
If the supply pressure is below 350 kPa, lower than acceptable flow rates
may occur.
Blocked filter
Water flow rate will diminish over time as the filter purifies sediments from
the water supply. Arrange for the filter to be replaced.
The electronic timer incorporates a filter life counter. the tap will indicate
when the filter should be changed by flashing the orange LED on the tap.
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU
NEED ASSISTANCE, CALL YOUR NEAREST RHEEM SERVICE
DEPARTMENT OR ACCREDITED SERVICE AGENT.

17
INSTALLATION
THIS BOILING WATER UNIT IS FOR INDOOR INSTALLATON ONLY.
BOILING WATER UNIT LOCATION
The boiling water unit is suitable for indoor installation only. The boiling water
unit should be installed close to the most frequently used outlet and its position
chosen with noise, safety and service in mind. Ensure that the air vents are
clear of obstructions at all times. This boiling water unit is designed to fit under
a standard sink (internal cupboard depth of 550mm).
The boiling water unit should be positioned with the 24 hour timer facing the
front of the cupboard for easy viewing.
Clearance must be allowed for servicing of the boiling water unit. The installer
must leave at least 50mm clearance on sides that have vents to allow air flow
to critical components.
You must be able to read the information on the rating plate. Remember you
may have to remove the entire water heater for servicing.
The installation must comply with the requirements of AS/NZS 3500.1, AS/NZS
3500.2, AS/NZS 3500.4, AS/NZS 3500.5, AS/NZS 3000 and water supply by-
laws, relevant local authority by-laws, codes (eg Building Code) and regulatory
authority requirements. In New Zealand, the installation must conform to the
New Zealand Building Code.
The water heater must not be installed in an area with a corrosive atmosphere
where chemicals are stored or where aerosol propellants are released.
Remember the air may be safe to breathe, but the chemicals may attack the
materials used in the construction of the boiling water unit, or adversely affect
the operation of the boiling water unit.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below,
an approved pressure limiting valve is required and should be fitted.
Model
TB3 / TB5
Max. mains water supply pressure
1000 kPa
Min. mains water supply pressure
100 kPa
Max. mains water inlet temperature
60°C
Min. mains water inlet temperature
1°C
TANK WATER SUPPLY
If the boiling water unit is supplied with water from a tank supply and a
minimum water supply pressure of 100 kPa at the boiling water unit cannot be
achieved, then a pressure pump system must be installed to allow the boiling
water unit to operate. The cold water line from the supply tank should be
adequately sized and fitted with a full flow gate valve or ball valve, and care
must be taken to prevent water hammer occurring between the pump and
boiling water unit. Failure to comply could void the warranty.

INSTALLATION
18
TYPICAL UNDERSINK INSTALLATION
COLD WATER INLET
The pipe work must be cleared of foreign matter before connection and purged
before attempting to operate the boiling water unit. All olive compression fittings
must use brass or copper olives. Use thread sealing tape or approved thread
sealant on all fittings.
It is mandatory for a union isolation valve to be fitted on the cold water
supply line to the boiling water unit as this makes removing the product
for servicing straight forward (the integrated Pressure Limiting Valve
incorporates a dual non-return valve therefore extra non-return valves are
not required for installation).
A good quality Watermarked Flexible Inlet Pipe must be installed between the
union isolation valve and inlet connector on the unit, suitably long enough to
allow the boiling water unit to be moved to the front of the cupboard so as to
overhang the cupboard front lip by 50mm.
Note: A low quality Flexible Inlet Pipe will deteriorate the water quality entering
the unit. Ensure that all flexible inlet pipes are Watermarked as this ensures
that water passing through Flexible Inlet Pipes does not deteriorate before
entering the boiling water unit.
Connect the cold water supply to the fitting marked “Inlet” on the boiling water
unit.
Step 1: Mains Water Connection
Inlet Water Pipe
Inlet Water
Connection ½”BSPT
Union Isolation Valve
Flexible Inlet Pipe

INSTALLATION
19
TAP BENCH INSTALLATION
To install the Rheem Tap onto a bench, a 35mm diameter hole must first be cut
in the bench top in the preferred mounting position (ensure that all burrs and
sharp edges are removed prior to fitting the tap). Next remove adhesive
backing from the Mounting gasket and stick the gasket to the underside of the
bench. The Tap (without Clamp Washer, Mounting Gasket or Mounting Nut) is
then lowered through the cut hole. Place the Clamp Washer over the Threaded
clamping rod and screw on the Mounting Nut. Tighten the Mounting Nut until
the tap is secure (prior to clamping the tap firmly in place, ensure that it is
pointing in the preferred direction for usage and the Tap Comms is clear to
move and not jammed between the bench and the clamp). For ease of
installation cut the threaded clamp rod to an appropriate length so the Clamp
Washer can be tightened by the Mounting Nut with a Screw Driver.
Boiling Water
Pipe
Tap Comms
Line
Clamping Nut
Boiling Water Outlet
Boiling Water Vent
Cold / Chilled
Water Outlet
Escutcheon
Step 6: Tap Bench Installation
Cold Water Pipe
Boiling Water Vent Pipe
Clamp
Threaded Clamp Rod
Mounting Gasket
¼” Cold Water Quick
Connect Fitting
Mounting Nut

INSTALLATION
20
BOILING/CHILLED WATER TAP
- Connect the silicone tube to the boiling water tap tube, and cut so the
silicone tube inserts onto the boiling water outlet on the unit without kinking.
- Connect the silicone tube to the vent pipe tube on the tap, and cut so the
silicone tube inserts onto the vent pipe outlet on the boiling unit without
kinking.
- Connect the ¼” Chilled water outlet pipe to the ¼” quick connect fitting on
the outlet line of the chiller, and cut so the chilled water outlet tube inserts
into the ¼” quick connect fitting on the Tap without kinking (Ensure that the
Chilled Water Outlet Pipe is able to also be connected to the Chiller
Water Supply connector on the Boiling Water Unit as this will facilitate
flushing the filter when a filter change is required).
- Connect the tap communications cable to the tap/chiller comms plug from
the boiling water unit (6 Pin). If a Rheem chiller is fitted in the installation,
the other comms cable is to be plugged into the chiller comms plug (4 pin,
connectors can only be inserted one way onto the plugs).
WARNING: ENSURE THAT ALL TUBES ARE CUT TO LENGTH,
INSTALLED WITHOUT KINKS OR TIGHT BENDS, AND HAVE CONTINUOUS
FALL. FAILURE TO DO SO WILL CAUSE A DETRIMENTAL EFFECT ON THE
PERFORMANCE OF THE UNIT AND RENDER THE WARRANTY VOID.
The Tap should be the last step in installation. Only once the Tap is
installed can you open the isolation valve and turn the unit on electrically.