Rheem 70103 Operating instructions

TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions 1
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
70103
70303
70207
70105
70305
70210
70307
70215
70225
70240
SERVICE INSTRUCTIONS
701, 702 & 703 Series
Boiling Water Units
TM063
Revision D
Published: 02/2017
701
702
703

TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions 2
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Contents
Introduction................................................................................................................................................. 3
Safety Warning........................................................................................................................................... 3
BWU Model Identification........................................................................................................................... 4
Preventative Maintenance.......................................................................................................................... 5
Specifications ............................................................................................................................................. 6
Wiring Diagrams......................................................................................................................................... 7
Wiring Diagram 3 –15L Models................................................................................................................. 7
Wiring Diagram 25 & 40L Models .............................................................................................................. 7
Plumbing Diagram...................................................................................................................................... 8
Operation.................................................................................................................................................... 8
Operational Flow Chart –701 & 702 Series ............................................................................................ 11
Operational Flow Chart –703 Series....................................................................................................... 12
Electronic Controller.................................................................................................................................13
Timer –701 & 702 Series......................................................................................................................... 13
Timer Functions........................................................................................................................................ 14
Setting the Clock...................................................................................................................................... 15
Accessing Service Menu.......................................................................................................................... 17
Eco Timer 703 Series............................................................................................................................... 20
Eco timer LED Indication (NZ Pre-2014 Models)..................................................................................... 21
Activate calibration reset mode (NZ Pre-2014 Models)........................................................................... 21
Eco timer LED Indication (Standard)........................................................................................................ 22
Activate calibration reset mode (Standard).............................................................................................. 22
Components and their Function............................................................................................................... 23
Common Complaints................................................................................................................................ 24
Fault Finding............................................................................................................................................. 24
Error Codes (701 & 702 Series Only)...................................................................................................... 25
Error Codes (703 Series only).................................................................................................................. 25
Testing the Boiling Water Thermistor....................................................................................................... 26
Error Codes A, B, C, D............................................................................................................................. 28
Error Codes E, G...................................................................................................................................... 29
Error Codes H, J....................................................................................................................................... 30
Error Codes K, L N................................................................................................................................... 31
Fault Finding Chart 1................................................................................................................................ 32
Fault Finding Chart 1.1, 1.1a.................................................................................................................... 33
Fault Finding Chart 2, 3............................................................................................................................ 34
Fault Finding Chart 4, 4.1 & 4.2............................................................................................................... 35
Fault Finding Chart 4a, incl. (4.1 & 4.2)................................................................................................... 36
Fault Finding Chart 5 .............................................................................................................................. 37
Fault Finding Chart 5a.............................................................................................................................. 38
Fault Finding Chart 6................................................................................................................................ 39
Fault Finding Chart 7................................................................................................................................ 40
Fault Finding Tests................................................................................................................................... 41
Electrical Safety Testing........................................................................................................................... 44
Component Replacement Procedures..................................................................................................... 46
Exploded view 1: 701 series Office model 3 & 5 litre............................................................................... 55
Exploded view 2: 702 series Commercial model 7.5 - 40 litre................................................................. 56
Exploded view 3: 703 series Eco model 3 –7.5 litre............................................................................... 57
Document Revision History...................................................................................................................... 58

3
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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Introduction
The information provided in these instructions is based on the Boiling Water Unit (BWU)
being installed in accordance with the Installation Instructions provided with each
appliance.
Should you require further technical advice on a BWU, contact your distributor where
genuine replacement parts are also available.
Safety Warning
The purpose of this service manual is to provide sufficient information to allow a person
with the skills as required by the Regulatory Authorities to carry out effective repairs to a
701, 702 or 703 Series BWU in the minimum of time.
Safety precautions or areas where extra care should be observed when conducting tests
outlined in this service manual are indicated by print in bold italics and/or a warning
symbol. Take care to observe the recommended procedure.
“Live” testing to be conducted. Personal Protective Equipment (PPE) shall
be worn. An RCD shall be installed between the power point and 3-pin cord
of the boiling water unit (3-15L capacity) to reduce the risk of electric
shock. Hard wired units (25-40L capacity) shall only have live testing
completed by a qualified electrician of appropriate class.
Isolate power before conducting the indicated test.
Hot surface or liquid. Personal Protective Equipment (PPE) shall be worn to
reduce the risk of burns or scalding.
General warning symbol. Observe the instructions accompanying the
symbol.
If the supply cord is damaged, it must be replaced by the manufacturer,
distributor or its service agent or a similarly qualified person in order to
avoid a hazard.

TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions 4
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BWU Model Identification
The identification numbers are designed to convey detailed information about the BWU to
which it is attached. The model number consists of 5 digits and 3-5 digits and letters.
Model Number
7
01
05
W
XX or XXXX
Type
7 –Boiling Water
Model Type
01 –Office Model
02 –Commercial Model
03 –Eco Model
Capacity in Litres
03 –3 litres
05 –5 litres
07 –7.5 litres
10 –10 litres
15 –15 litres
25 –25 litres
40 –40 litres
Finish
W –White
S –Stainless steel
NZ or Australia Version
NZ –New Zealand Version
(Plug Type I, 15mm BSPP, Rheem branded)
AU –Australia Version
(Plug Type I, 12mm BSPP, Rheem branded)
International Version
X
X
X
X
Plug Qty
0 –No Plug
1 –With Plug
Plug Type*
eg. E, F, G, I,
L, M, N (X = None)
Plumbing Fitting Type
0 –15mm BSPP
1 –12mm NPT
Brand
R - Rheem
E - Everhot
V - Vulcan
L - Lazer
*for plug type regions, see http://www.iec.ch/worldplugs/
OR

TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions 5
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Preventative Maintenance
It is suggested for peak performance that the BWU be serviced every six months.
Servicing must be performed by suitably qualified persons.
Hot surface or liquid. Personal Protective Equipment (PPE) shall be worn to
reduce the risk of burns or scalding.
1. Check the inlet strainer located inside the water inlet connection to ensure it is clean
and not blocked with foreign matter. If an additional auxiliary filter is fitted, such as in
areas of poor water quality check to ensure it is also clean and not blocked with foreign
matter.
2. Check for signs of excessive corrosion on jacket and internal panels. Corrosion can be
indicative that a leak is present.
3. Check for leaks at all BWU fittings and seals.
4. Check the vent line to ensure it is not blocked with foreign matter. It is imperative that
the vent line does not become blocked as the BWU is not designed to be
pressurised.
5. Isolate power and check all electrical connections for signs of overheating due to poor
connection.
6. Conduct an electrical insulation test. (Refer to page 45).
7. Check tap for signs of leaking & excessive dripping after operation (clean or replace if
required.
WARNING
This Boiling Water Unit contains electronic equipment and insulation tests must
only be conducted between neutral and earth or between active and earth.

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TM063 701, 702 & 703 Series BoilingWater Unit Service Instructions
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Specifications
Lazer Boiling Water Unit
70103 …..
70303 …..
70105 …..
70305 …..
70207 …..
70307 …..
70210 …..
70215 …..
70225 …..
70240 …..
Storage capacity
3 Litres
5 Litres
7.5 Litres
10 Litres
15 Litres
25 Litres
40 Litres
Max supply pressure (1)
1000kPa
Min supply pressure
50kPa
75kPa
100kPa
Cold water inlet connection
RP½/15
Overflow / vent connection
RP½/15
Supply voltage
230 –240 Volts AC 50Hz
Electrical connection
10A 3 pin plug
Fixed wiring
Element
kW
1.8kW
2.4kW
3.6kW
4.6kW
Resistance
32 ohms
24 ohms
16 ohms
12 ohms
Amperage
7.5A
10A
15A
20A
E.C.O. setting
Open 105ºC (manual reset)
Open 110ºC (manual reset)
Inlet solenoid
Resistance
3.5 Kilo ohms
Flow regulator
0.5 L/M (yellow regulator located in solenoid)
2.5 L/M (brown regulator located in solenoid)
Boiling thermistor resistance
Refer to table on page 26
Approx recovery(2)
17.5 L/hr
21 L/hr
21 L/hr
21 L/hr
21 L/hr
33 L/hr
41 L/hr
Approx heat time to capacity (2)
12 min
15 min
22 min
29 min
40 min
40 min
50 min
Drain plug
No
Yes
Inlet strainer (3)
Yes
(1) If the supply pressure exceeds 1000kPa, a pressure limiting valve must be installed upstream of the BWU.
(2) Operation based on temperature rise of 77°C
(3) In areas with poor water quality an additional filter should be installed.

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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Wiring Diagrams
Wiring Diagram 3 –15L Models
Wiring Diagram 25 & 40L Models (Commercial 702 Series only)
(Standard)
(NZ model Pre 2014)

8
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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Plumbing Diagram
Water Inlet and Vent Connections
Cold mains pressure water must be piped
and connected to the RP½/15 inlet fitting
located on the left hand side underneath
the BWU.
An accessible isolating valve must be
installed near the BWU.
The BWU contains an inlet strainer on the
water inlet connection. Where poor water
quality is present it is recommended to
install an additional auxiliary filter.
The vent pipe is to be made of a material
that cannot be degraded by continuous
steam (i.e. copper).
Operation
701, 702 and 703 Series BWU operate on 230 - 240 volts AC and will deliver gravity fed
boiling water via a lever operated tap mounted on the BWU.
Sequence of Operation
Refer to BWU Sequence of Operation Component Diagrams’ on page 10 to view
components shown in brackets e.g. (1).
1. When power is supplied to the BWU the control board relay (1) is energised. If the low
level probe (2) does not detect water the inlet solenoid valve (3) is energised allowing
water to enter and partially fill the boiling water tank (4) until 15 seconds after the low
level probe (2) detects water. Note: Upon initial filling and calibration, the inlet solenoid
valve (3) is energised until 30 seconds after the low level probe (2) senses water.
2. When the BWU is operated for the first time, or auto calibration mode is selected (5),
the unit will enter auto calibration mode. When in auto calibration mode the BWU will
perform three heating operation cycles in which to determine and program the
optimum boiling water temperature setting according to altitude. The optimum boiling
water temperature is termed ‘Treq’ which is the water temperature the BWU will
maintain the boiling water at after calibration. Auto calibration mode takes
approximately 18 –30 minutes to perform (depending upon model capacity) and
should not be interrupted.
3. After calibration or under normal operating conditions; if the boiling water thermistor (6)
detects a temperature of less than 94ºC, or less than or equal to Treq -2ºC, the control
board triac (7) allows power to the boiling water element (8) on a percentage basis of
between 20% (48 volts) to 100% (230 - 240 volts) depending upon the temperature,
i.e. higher temperature difference equals higher percentage basis.
All models have same pipework configuration

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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4. After first time calibration or after drawing boiling water; the control board will
incrementally fill and heat the water in the boiling water tank (4). After the first
incremental fill, the water in the boiling water tank (4) is heated to Treq -2ºC at which
time the control board will energise the inlet solenoid valve (3) until the water in the
boiling water tank (4) is at -3 ºC of Treq which allows more water to enter the boiling
water tank (4) (normally 4 –15 seconds). This allows the boiling water to be heated in
increments enabling boiling water to be available in a shorter period of time. This
process is continued until the high level probe (10)detects water at which time the
inlet solenoid valve (3) is de-energised and incremental filling ceases.
5. After the high level probe (10) detects water, heating is continued until the boiling
water thermistor (6) detects a temperature equal to Treq at which time the control
board triac (7) switches off (de-energising the boiling water element (8))and the
control board relay (1) is de-energised.
6. When the tap (9) lever is operated, boiling water is gravity fed to the tap (9) outlet. As
the water level in the boiling water tank (4) falls below the high level probe (10)the
inlet solenoid valve (3) is energised allowing water to enter the boiling water tank (4)
again in 4 –15 second incremental fills or until the high level probe (10)detects water
again (depending upon the amount of boiling water drawn). It should be noted that if
the water level in the boiling water tank (4) falls below the low level probe (2) at any
time, the boiling water element circuit is disabled until the low level probe (2) detects
water again for a period of 1 second or more.
7. When the high level probe (10) detects water again, the inlet solenoid valve (3) is de-
energised preventing water from entering the boiling water tank (4).
8. If during any stage of operation:
The boiling water thermistor (6) becomes open or short circuited,
The low level probe (2) is shorted to earth, or
The control board triac (7) becomes short circuited,
The inlet solenoid valve (3) and control board triac (7) are de-energised (if on) and the
control board relay (1) will turn off (be de-energised).
Notes:
701 & 702 series only: If the timer (5) ‘off period’ has been programmed and reached,
the boiling water Treq temperature is changed from calibrated Treq temperature to 0ºC,
until the next timer ‘on period’ is reached, or the timer (5) ‘off period’ is deactivated by
pressing any timer button, at which time the calibrated Treq setting will return to normal.
This is an energy saving function.
703 Series: If the Eco timer (5) has been set and reached, again, the boiling water Treq
temperature changes from calibrated Treq temperature to 0ºC. Sleep mode is
deactivated by pressing and releasing the ‘ECO’button, at which time the calibrated
Treq setting will return to normal. This is an energy saving function.

10
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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BWU Sequence of Operation Component Diagram
3 –15L Models
LH side
Front view NZ 703 series
RH side
1
Control board relay
5
Timer
9
Tap
2
Low level probe
6
Boiling water thermistor
10
High level probe
3
Inlet solenoid valve
7
Control board triac
4
Boiling water tank
8
Boiling water element
25 –40L Models
Left Hand View Front View Commercial Right Hand View
7
4
1
9
8
6
3
3
9
5
4
703 Display
(Standard)
703 Display
(NZ Pre 2014)

11
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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Operational Flow Charts
Operational Flow Chart –701 & 702 Series
(7)
(4)
(2, 6)
Water drawn off
YES
(1)
Plug In
Power On Fault rectified Isolate Power
NO
Inlet solenoid off
(if on)
Control board triac
(element) disabled
Control board
relay off
NO Inlet solenoid on
Control board triac
(element) off (if on)
NO Inlet solenoid
off after 30 seconds
Full ‘auto calibration’
cycle performed
Control board
relay on
Control board triac
(element) on 20% - 100%
NO
Water temp (Treq)
maintained at 0ºC
(element off)
NO
NO
Control board triac
(element) off
YES
NO
YES
YES
YES
YES
YES
Inlet solenoid on
Inlet solenoid off
YES
Inlet solenoid off
YES
YES
YESNO
NO YES
NO
Control board triac
(element) on 20% - 100%
YES
Notes:
(1) Control board relay on = Boiling water triac (element) circuit enabled.
(2) The PCB monitors for faults while ever the boiling water unit is operating.
(3) ‘Tb’ is the boiling point temperature detected during calibration; ‘Treq’ is the temperature the water will be maintained at;
‘T0’ is the water temperature detected by the boiling water thermistor.
(4) Calibration is automatically performed by the control board on initial power up. Calibration will take approx 18 - 30
minutes (depending upon capacity) during which time 2 heating cycles will be performed. The tap should not be operated
whilst calibration is being performed.
(5) When measured using a conventional multimeter the voltage will be approx. 48 –240 VAC.
(6) Critical faults are; Hot Sensor O/C or S/C, Triac S/C & Level Probe shorted to earth.
(7) Control board relay off = Boiling water triac (element) circuit disabled.
Critical fault
detected?
Timer
button pressed?
High level probe
detecting water?
Timer ‘ON’
period reached?
Timer in ‘OFF’
period and AUTO
selected?
Sleep mode
period set? TImer
button pressed?
High level probe
detecting water?
‘T0’ < 70°C
for 3.5 days?
High level probe
detects water?
‘T0' < ‘Tb’-3?
Low level probe
detects water?
Auto calibration
already
performed?
‘T0’= ‘Treq’-2? ‘T0’ < ‘Treq’-3?
Error Code Displayed
Inlet solenoid off after
15 seconds (if on)
‘Treq’ value set
using ‘Temp
Override’?
NO (3)
Reduced ‘auto
calibration’ cycle
performed
(5)
(3)
(3)
(3) YES
(3)
‘Treq’ becomes ‘Tb’-3
‘Treq’ becomes ‘Tb’-2
Critical fault detected?
YES
NO
NO
(2, 6)
(3)
‘T0' = ‘Treq’?
Control board triac
(element) off
(3)
YES
NO
NO
NO
YES
NO
High level probe
detects water?
YES
NO
(3)
Water drawn off
Control board triac
(element) on 20% - 100%
YES ‘T0’ = 70°C?
NO
Control board triac
(element) off
YES
(3)
(5)
(5)
Low level probe
detects water?
NO
YES NO
YES
A
A

12
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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Operational Flow Chart –703 Series
(7)
(4)
(2, 6)
YES
(1)
Plug In
Power On Fault rectified Isolate Power
NO
Inlet solenoid off
(if on)
Control board triac
(element) disabled
Control board
relay off
NO Inlet solenoid on
Control board triac
(element) off (if on)
NO Inlet solenoid
off after 30 seconds
Calibration cycle
performed
Control board
relay on
Control board triac
(element) on 20% - 100%
Water temp (Treq)
maintained at 0ºC
(element off)
NO
YES
YES
YES
YES
YES
Inlet solenoid on
Inlet solenoid off
YES
Inlet solenoid off
Control board triac
(element) on 20% - 100%
Notes:
(1) Control board relay on = Boiling water triac (element) circuit enabled.
(2) The PCB monitors for faults while ever the boiling water unit is operating.
(3) ‘Tb’ is the boiling point temperature detected during calibration; ‘Treq’ is the temperature the water will be maintained at; ‘T0’ is
the water temperature detected by the boiling water thermistor.
(4) Calibration is automatically performed by the control board on initial power up. Calibration will take approx 18 - 30 minutes
(depending upon capacity) during which time 2 heating cycles will be performed. The tap should not be operated whilst calibration
is being performed. Also refer to note 8.
(5) When measured using a conventional multimeter the voltage will be approx. 48 – 240 VAC.
(6) Critical faults are; Hot Sensor O/C or S/C, Triac S/C & Level Probe shorted to earth.
(7) Control board relay off = Boiling water triac (element) circuit disabled.
(8) To activate sleep delay mode: (NZ) press and release the ‘eco’ button whilst the eco circle surround is extinguished, (AU) press
the ECO button whilst the green ECO LED is extinguished. When the ‘eco’ button is released: (NZ) the eco circle surround, (AU)
the ECO LED will illuminate green to indicate the unit is in sleep delay mode. When the unit is asleep the ‘Press eco to heat’ text
will illuminate: (NZ) green, (AU) ‘ECO’ within the text ‘PRESS ECO TO HEAT” illuminates Red.
(9) To deactivate sleep delay mode press and release the ‘eco’ button: (NZ) whilst the eco circle surround is illuminated green, (AU)
press the ECO button whilst the green ECO LED is illuminated. When the ‘eco’ button is released the: (NZ) eco circle surround,
(AU) ECO LED will extinguish.
(10) Calibration mode can be entered by removing power supply then holding the ECO button in the depressed position whilst
restoring power supply. The ‘HEATING LED’ will illuminate and flash at which time the ECO button can be released. The unit will
now recalibrate.
Critical fault
detected?
Sleep delay
mode activated? Sleep delay
mode
deactivated?
‘T0’ < 70°C
for 3.5 days?
High level probe
detects water?
‘T0' < ‘Tb’-3?
Low level probe
detects water?
Auto calibration
already
performed?
‘T0’ = ‘Treq’-2? ‘T0’ < ‘Treq’-3?
Inlet solenoid off after
15 seconds (if on)
(5)
(3)
(3)
(3)
(3)
‘Treq’ becomes ‘Tb’-3
‘Treq’ becomes ‘Tb’-2
Critical fault detected?
YES
NO
NO
(2, 6)
(3)
‘T0' = ‘Treq’?
Control board triac
(element) off
(3)
YES
NO
NO
NO
YES
NO
High level probe
detects water?
YES
NO
(3) Control board triac
(element) on 20% -
100%
YES ‘T0’ = 70°C?
NO
Control board triac
(element) off
YES
(3)
(5)
(5)
Low level probe
detects water?
NO
YES NO
YES
A
A
YES
Water temp (Treq)
becomes ‘Tb’ - 3
Calibration
mode entered?
YES
NO
NO
(10)
2 hrs since last
solenoid valve
operation?
YES
NO
(8)
(8) (9)
(9)
Note: Refer to page 21 for timer LED indication.

13
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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Electronic Controller
The control board or electronic controller is used to control the BWU by monitoring the
water temperatures in the boiling water tank (via the boiling water thermistor) and
processing commands received from the timer.
The control board has a relay which when energised will switch power to the boiling water
triac (boiling water element circuit). In the event of a critical fault the control board relay will
de-energise and open circuit the boiling water element circuit preventing it from operating.
3 –15L Model Electronic Controller
25 & 40L Model Electronic Controller
Timer
There are two types of timers available depending upon BWU series. Refer to ‘Timer –701
& 702 series below or Eco Timer –703 Series page 20.
Timer –701 & 702 Series
701 & 702 series BWUs are supplied with a programmable
24 hour 7 day timer which can be programmed to turn the
BWU ‘ON’or ‘OFF’at predetermined days and times.
The timer incorporates a ‘Sleep Delay Time’function which
when programmed will automatically shut the system down
after a set period of time of no use i.e. after 6 hours.
The timer has a ‘Filter Life’function which when
programmed and selected will display the remaining life of
the water filter in litres. Note: A water filter is optional and is
not supplied as standard.
The timer has a ‘Service Menu’ which can display error
codes, temperature settings etc.
Front view
Rear view

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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The timer also has a key lock function which when activated prevents access to the
program functions.
Timer Functions
Function
Mode
Description
Clock
N/A
Set clock time.
STD/AUTO
STD
BWU ‘ON’24 hours 7 days.
AUTO
BWU operates according to programmed
‘Set ON/OFF Times’.
Set ON/OFF Times
N/A
Program ON/OFF times for AUTO mode.
Sleep Delay Time
N/A
Program delay-off time from last usage
(operates in AUTO mode only).
Filter Life*
Remaining Life
Displays remaining filter life in litres.
Filter Reset
Resets filter ‘Remaining Life’ to ‘Set Filter
Life’ setting. Utilised when replacing filter.
Set Filter Life
Program filter life start value in litres.
Service Menu
Error Codes
Displays alpha error codes (refer to page
25 for error codes and their meanings).
Boiling Temp
Displays the current boiling water
temperature in ºC.
Calib. Reset
Reactivates automatic boiling point
calibration operation.
Temp Override
Manually select calibrated temp setting.
Selectable from 70 –99 ºC.
Software Version
Displays Timer and Controller software
versions (top = Timer, lower = Controller).
Temp Show ON/OFF
Enable/disable boiling water temperature
display on timer screen (in ºC).
TB Treq
Displays boiling water temperatures in ºC.
(TB = calibrated temp, Treq = maintained
temp).
* 701 and 702 Series BWUs do not have a water filter however filter life functions can be
utilised if the water supply to the BWU has a water filter fitted.
Timer Operation
Selecting a Timer Function
1. Press and release the (P) button until the desired function is displayed flashing on
the screen (refer to table above for a list of available timer functions).
2. Press and release the (✓)button to confirm selection.
Notes:
Pressing and releasing the (X) button at any time returns the unit to the main menu.
Any functions previously accepted will be retained.
The display will revert back to main menu from any mode if a button has not been
pressed after 1 minute.

15
TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
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Setting the Clock
1. Press and release the (P) button, ‘Clock’ is displayed flashing on the screen.
2. Press and release the (✓) button to confirm selection. ‘Set Clock Day’ will be
displayed on the screen with the day selection shown flashing.
3. Press and release the (▲) button until the desired day is selected.
4. Press and release the (✓) button to confirm selection. ‘Set Clock HOUR’ will be
displayed on the screen with the hours section of the time shown flashing.
5. Press and release the (▲) button until the desired hour (24 hour time) appears
flashing on the screen.
6. Press and release the (✓)button to confirm selection. ‘Set Clock MIN’ will be
displayed on the screen with the minutes section of the time shown flashing.
7. Press and release the (▲) button until the desired minute appears flashing on the
screen.
8. Press and release the (✓) button to confirm selection. The display will revert to the
main menu and the time setting will be saved.
Selecting STD or AUTO Mode
1. Press and release the (P) button until ‘Timer STD/AUTO’ is displayed flashing on
the screen.
2. Press and release the (✓) button to confirm selection. ‘STD’ will be displayed
flashing on the screen.
3. Pressing and releasing the (▲) button alternates between the ‘STD’ and ‘AUTO’
icons.
4. Press and release the (✓) button when the ‘STD’ or ‘AUTO’ icon is shown on the
display. The display will revert to the main menu. If ‘STD’is selected the unit will
operate 24 hours a day. If ‘AUTO’is selected the unit will operate according to the
pre set times on the timer (refer to ‘Programming Set ON/ OFF Times’ below).
Note: If the timer is in ‘AUTO’ mode and is in an ‘OFF’ period, the pressing of any Timer
button or drawing water will reactivate the unit. The unit will then operate normally until the
next programmed ‘OFF’ time.
Programming ‘Set ON/OFF Times’(For Use in ‘AUTO’ Mode)
Note: A highlighted numeral i.e. 7:00 indicates that the highlighted numeral 7 is flashing on
the display. X:XX is your time setting.
1. Press and release the (P) button until ‘Set ON/OFF Time’ is displayed flashing on
the screen.
2. Press and release the (✓) button to confirm selection.
‘SUN 7:00 –7:00 Set ON hour’ will be displayed on the screen.
3. Press and release the (▲) button until the desired hour appears flashing on the
screen.
4. Press and release the (✓) button to confirm selection.
‘SUN X:XX –X:XX Set ON minute’ will be displayed on the screen.

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
5. Press and release the (▲) button until the desired minutes appear flashing on the
screen.
6. Press and release the (✓) button to confirm selection.
‘SUN X:XX –X:XX Set OFF hour’ will be displayed on the screen.
7. Press and release the (▲) button until the desired hour appears flashing on the
screen.
8. Press and release the (✓) button to confirm selection.
‘SUN X:XX –X:XX Set OFF Minute’ will be displayed on the screen.
9. Press and release the (▲) button until the desired minutes appear flashing on the
screen.
10.Press and release the (✓) button to confirm selection.
‘MON 7:00 –17:30 Set ON hour’ will be displayed on the screen.
11.Continue steps 3 –8 for Monday through to Saturday. When step 8 is completed for
Saturday the display will automatically revert to the main menu and the program will
be saved.
Note: To program the unit to be in ‘OFF’ mode for an entire day, set the ‘ON’ and ‘OFF’
times to be the same i.e. ‘ON = 0:00 OFF = 0:00’
Programming ‘Sleep Delay Time’
1. Press and release the (P) button until ‘Sleep Delay Time’ is displayed flashing on
the screen.
2. Press and release the (✓) button to confirm selection. ‘Sleep Delay Time OFF’ will
be displayed on the screen with ‘OFF’ flashing.
3. Press and release the (▲) button until the desired time setting appears flashing on
the screen. Each consecutive push and release of the (▲) button increases the time
setting in one hour increments up to a maximum of 6 hours. If the (▲) button is
pressed and released after ‘6’is reached ‘OFF’ will be displayed and if accepted,
the sleep delay timer will be turned off.
4. When the desired setting is reached press and release the (✓) button to confirm
selection. The display will revert to the main menu and the setting will be saved.
Note: The sleep function puts the unit in a standby mode after a user defined period (1 –6
hours). The unit will enter ‘Sleep’ mode if it has not been used for the programmed
‘Sleep Delay Time’ period. During ‘Sleep mode’ the unit will change the Treq boiling
water temperature to 0ºC instead of the normal Treq (approximately 97ºC). To exit
sleep mode, press any Timer button to reactivate the unit. The unit will then operate
normally.
Selecting ‘Filter Life’Functions
The Filter Life function has three modes to select from, ‘Remaining Life’, ‘Filter Reset’ and
‘Set Filter Life’. These modes are accessed as follows:
Accessing ‘Remaining Life’
1. Press and release the (P) button until ‘Filter Life’ is displayed flashing on the
screen. Note: if ‘Remaining Life – COUNT IS OFF’ is displayed on the screen
proceed directly to step 3 otherwise proceed to step 2.

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
2. Press and release the (✓) button to confirm selection. ‘Remaining Life XXXX Litres’
will be displayed on the screen where XXXX is the value of remaining filter life in
litres.
3. Press and release the (X) or (✓) button to revert back to the main menu.
Activating ‘Filter Reset’ & ‘Set Filter Life’
1. Press and release the (P) button until ‘Filter Life’ is displayed on the screen. Note: if
‘Remaining Life – COUNT IS OFF’ is displayed on the screen proceed directly to
step 3 otherwise proceed to step 2.
2. Press and release the (✓) button to confirm selection. ‘Remaining Life XXXX Litres’
will be displayed on the screen.
3. Press and release the (▲) button. ‘Filter Reset’ is displayed on the screen.
4. Press and release the (✓) button to confirm selection. ‘Are You Sure’ will be
displayed flashing on the screen.
5. Press and release the (✓) button to confirm selection. ‘Set Filter Life YYYY Litres’ is
displayed on the screen (with ‘YYYY Litres’ flashing) where YYYY is the previous
preset value in litres. Note: ‘OFF’ may be displayed flashing on the screen if the
previous value was set to OFF.
6. Press and release the (▲) button until the desired setting appears flashing on the
screen. Each consecutive push and release of the (▲) button increases the
capacity setting in 1,000 litre increments from a start value of 1,000 litres up to a
maximum setting of 14,000 followed by OFF.
7. Press and release the (✓) button to confirm selection. The display will revert to the
main menu and the setting will be saved.
Accessing Service Menu
The service menu has seven modes to select from (refer to ‘Timer Functions’ page 14).
When service mode is entered, any existing error codes will be displayed on the screen.
(Refer to page 25 for error codes and their meaning.)
Each mode is accessed as follows:-
Accessing Error Codes
1. Press and release the (P) button until ‘Service’ is displayed on the screen.
Press and release the (✓) button to confirm selection.
2. Press and release the (X) or (✓) button to revert back to the main menu.
Note: An error code will be automatically cleared from the display when the fault
relating to that error code is rectified and the BWU is re-powered.
(Refer to page 25 for error codes and their meaning.)
Accessing Boiling Temp
1. Press and release the (P) button until ‘Service’ is displayed on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘Boiling Temp XXX ºC’ is displayed on the
screen where XXX is the current boiling water temperature in ºC.
4. Press and release the (X) or (✓) button to revert back to the main menu.

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Activating Calibration Reset Mode
Different altitudes will cause water to boil at different temperatures. To prevent the water
in the boiling water tank from boiling continuously (which is energy inefficient) the BWU
is fitted with an altitude calibration function which automatically operates when the unit
is operated for the first time or if ‘calibration reset mode’ is activated. If the boiling water
delivery temperature is not hot enough or the unit continuously boils, ‘calibration reset
mode’should be activated to recalibrate the unit.
When the unit is calibrating, the BWU will boil the water twice (approximately 60
seconds each time) in order to calibrate the optimum boiling point according to altitude.
During this procedure steam and water droplets will be vented from the vent outlet on
the tap. The entire calibration period will take approximately 18-20 minutes and
must not be interrupted; this includes operation of the tap outlet.
1. Press and release the (P) button until ‘Service’ is displayed on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘Calib. Reset’ is displayed on the screen.
4. Press and release the (✓) button to confirm selection. ‘Are You Sure’ will be
displayed on the screen.
5. Press and release the (✓) button to activate calibration mode. Existing error codes
will be displayed on the screen.
6. Press and release the (✓) button to revert back to the main menu ‘Calibrating Do
Not Interrupt’ will be displayed on the timer screen and the unit will recalibrate the
boiling water temperature. When calibration is complete the timer display will
automatically revert back to the main menu.
Activating Temp Override
Temperature override allows the installer to set the calibrated temperature to perform a
fast calibration when the unit is operated for the first time, or to change the boiling water
temperature to a selectable value from 70ºC –99ºC.
1. Press and release the (P) button until ‘Service’ is displayed flashing on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘Temp override’ is displayed on the screen.
4. Press and release the (✓) button to confirm selection. The current calibrated (or
preset) boiling water temperature will be displayed flashing on the screen.
5. Press and release the (Up) button until the desired setting appears flashing on the
screen. Each consecutive press and release of the (Up) button increases the boiling
water temperature setting in 1ºC increments from 70ºC to a maximum of 99 ºC.
6. Press and release the (✓) button. ‘Are You Sure’ will be displayed flashing on the
screen.
7. Press and release the (✓) button to confirm selection after which time the timer
screen will revert back to the main menu, ‘Calibrating Do Not Interrupt’ will be
displayed on the timer screen and the unit will recalibrate the boiling water
temperature to the new selected temperature. When calibration is complete the
timer display will automatically revert back to the main menu.

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Accessing Software Version
1. Press and release the (P) button until ‘Service’ is displayed on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘Software Version’ is displayed on the
screen.
4. Press and release the (✓) button to confirm selection. The software version will be
displayed on the screen. The top digits refer to the timer software version and the
lower digits refer to the controller software version.
5. Press and release the (X) or (✓) button to revert back to the service menu. Existing
error codes will be displayed on the screen.
6. Press and release the (X) or (✓) button to revert back to the main menu.
Permanently Display the Boiling Water Temperature (Temp Show ON/OFF)
This function allows the temperature of the water within the BWU to be permanently
displayed on the timer display screen.
1. Press and release the (P) button until ‘Service’ is displayed on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘TempShow ON/OFF’ is displayed on the
screen.
4. Press and release the (✓) button to confirm selection. The current setting, ‘ON’ or
‘OFF’ will be displayed flashing on the screen.
5. Press and release the (▲) button to cycle between ON and OFF.
6. Press and release the (✓) button to confirm selection. The display will revert to the
service menu. Existing error codes will be displayed on the screen.
7. Press and release the (X) or (✓) button to revert back to the main menu.
Accessing Calibrated & Required Temperature (TB Treq) Information
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.
1. Press and release the (P) button until ‘Service’ is displayed on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘TB Treq’ is displayed on the screen. Under
the letters ‘TB’ the boiling water calibration temperature will be displayed in ºC.
Under the letters ‘Treq’ the temperature the unit will maintain the water at will be
displayed in ºC.
4. Press and release the (X) or (✓) button to revert back to the main menu.

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Activating Key Lock Function
This function is for extra security to prevent tampering with the unit settings. Default setting
is disabled.
To activate keypad lock
1. Press and release the (P) button until ‘Keylock’ is displayed on the screen.
2. Press and release the (✓) button to confirm selection. ‘Key lock enable’ will be
displayed on the screen.
3. Press and release the (✓) button to confirm selection. ‘Keypad Locked’ will be
displayed on the screen when any button is pressed.
To deactivate keypad locks
1. Press (P) and (▲)buttons simultaneously for a period of approximately 5 seconds
until ‘Keypad Locked’ disappears from the screen and display returns to normal.
Eco Timer 703 Series
703 series BWUs are supplied with an Eco sleep timer.
NZ model (Pre 2014)
Standard
The timer incorporates a ‘Sleep Delay Mode’ which when activated will automatically shut
the system down after a set period of time of without use (2 hours).
To activate sleep delay mode press and release the ‘eco’/’ECO’ button: (NZ Pre 2014)
whilst the ‘eco’circle surround is extinguished or (Standard) whilst the green ‘ECO’LED is
extinguished. When the ‘eco’/’ECO’ button is released: (NZ Pre 2014) the eco circle
surround will illuminate green to indicate the unit is in sleep delay mode or (Standard) the
ECO LED will illuminate green to indicate the unit is in sleep delay mode. When the unit is
asleep the: (NZ Pre 2014) ‘Press eco to heat’ text will illuminate: green, (Standard) ECO at
the top of display glows red.
To deactivate sleep delay mode press and release the ‘eco’ button: (NZ Pre 2014) whilst
the eco circle surround is illuminated green or (Standard) press the ‘ECO’button whilst the
green ECO LED is illuminated. When the ‘eco’/’ECO’ button is released: (NZ Pre 2014) the
eco circle surround or (Standard) the ECO LED will extinguish.