Rheem II Series Operating instructions

This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
Rheem Australia Pty Ltd ABN 21 098 823 511
12-26L Series II
Continuous Flow Gas Water Heater
TM090
Issued: Oct 2017
Revision: AB
Issued: Feb 2019
Rheem
Solahart
874812XF
876812XF
874T16XF
876T16XF
874820XF
874820XF/J
876820XF
874T26XF
876T26XF
10143267
874826XF/J
10143268
First Issued: 10/2017

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
2
CONTENTS
INTRODUCTION .................................................................................................................3
SAFETY WARNING.............................................................................................................3
Live Testing......................................................................................................................3
Touch Voltage Testing .....................................................................................................4
WATER HEATER MODEL IDENTIFICATION.....................................................................5
SPECIFICATIONS...............................................................................................................5
WIRING DIAGRAM..............................................................................................................8
PRESET TEMPERATURE ADJUSTMENT .........................................................................9
FINE TEMPERATURE ADJUSTMENT................................................................................9
SEQUENCE OF OPERATION...........................................................................................10
ANTI-FROST HEATER CIRCUIT ......................................................................................12
IN-SERIES GAS BOOSTING ............................................................................................12
TEMPERING VALVES.......................................................................................................13
REMOTE CONTROLLERS................................................................................................14
BATH FILL OPERATION...................................................................................................19
HOW TO FAULT FIND ......................................................................................................21
OPERATIONAL FLOW CHARTS ......................................................................................23
ERROR CODES................................................................................................................26
DIAGNOSTIC TEST POINTS............................................................................................27
MAINTENANCE INFORMATION.......................................................................................28
CLEARING ERROR CODE HISTORY ..............................................................................30
RESETTING ERROR CODES...........................................................................................31
Test Equipment..............................................................................................................31
FAULT FINDING................................................................................................................32
Fault Diagnosis Sequence .............................................................................................38
Fault Finding Chart 1......................................................................................................39
Fault Finding Chart 2......................................................................................................40
Fault Finding Chart 3......................................................................................................41
Fault Finding Chart 3.1...................................................................................................42
Fault Finding Chart 3.2...................................................................................................43
Fault Finding Charts 3.3 & 3.5........................................................................................44
Fault Finding Chart 3.6...................................................................................................45
Fault Finding Chart 3.7...................................................................................................46
Fault Finding Charts 4 and 4.1.......................................................................................46
Fault Finding Chart 5......................................................................................................47
EziSET®Fault-Finding.......................................................................................................48
BURNER GAS PRESSURE CHECK.................................................................................50
COMPONENT REPLACEMENT PROCEDURES .............................................................52
DOCUMENT REVISION HISTORY...................................................................................60

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
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INTRODUCTION
The information provided in these instructions is based on the water heater being installed
in accordance with the Installation Instructions provided with each water heater.
Contact Rheem Technical Support on 1300 712 863 should you require any further technical
advice regarding a 12-26L Series II Continuous Flow water heater.
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 Rheem
Continuous Flow Gas Water Heater 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
A number of test procedures detailed within this service instruction
require ‘live’ testing to be conducted.
All State and Territory Authorities stipulate requirements that must be met
before working live i.e. conducting a risk assessment and/or preparing a
safe work method statement and wearing appropriate PPE.
It is the responsibility of the service person to be aware of and comply
with the requirements of the State or Territory where the water heater is
installed before working ‘live’.
An RCD shall be installed between the power point and 3-pin cord of the
water heater to reduce the risk of electric shock.
Isolate power before conducting the indicated test.
Hot surface or liquid. Personal Protective Clothing (PPE) shall be worn to
reduce the risk of scalding.
General warning symbol. Observe the instructions accompanying the
symbol.
If the supply cord is damaged, it must be replaced by the manufacturer or
its service agent or a similarly qualified person in order to avoid a hazard.
When conducting repairs to a gas appliance the gas train including
injector sizes must not be altered or modified in any way.

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
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Touch Voltage Testing
Under certain fault conditions it is possible for
the metal jacket of a water heater to become
live.
The electrical fault may be an internal appliance
issue or an issue with the building supply wiring
(see diagram 1 opposite).
To check for a shock hazard in a suspect
installation a Touch Voltage Test must be
applied using the following equipment:
1. A high impedance multimeter with an
input impedance greater than 5 mega-
ohm.
2. A 2kΩresistor box fitted with contact
terminals.
3. A long trailing lead for connection to
the premises earth electrode.
Note: The 2kΩresistor is used to simulate
the body resistance of a typical person.
Diagram 2
Procedure:
Personal Protective Equipment (electrical insulating gloves) should be
worn when conducting this procedure to reduce the risk ofelectric shock.
1. Connect the resistance box between the metal casing of the appliance and the main
Earth electrode (Spike) using the long trailing lead (as shown in diagram 2).
2. Connect the multimeter (set on the AC volts scale) to the resistor box terminals and
record the reading.
3. If the reading is higher than 50VAC (Dry) or 25VAC (Wet) then there is a fault either
within the electrical installation or with the appliance.
4. To confirm the earthing of the water heater;
Electrically isolate the appliance from the electrical circuit
Conduct an earth continuity test to AS/NZS 3760 (pay particular attention to the
cordset earth on plug in water heaters).
If the earth path of the appliance is intact, the problem is with the household wiring.
Diagram 1

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WATER HEATER MODEL IDENTIFICATION
The identification numbers are designed to convey detailed information about the water
heater to which it is attached.
8
7
4
8
12
N
F
J
Model Number
8 - Rheem
Location
7 - External
Temperature Setting
4 - 75 ºC Max Temp
6 - 54 ºC .Max Temp.
Heater Reference
8 –High Efficiency
T –High Efficiency Metro series
Capacity
12 –12l/m @25 ºC rise
16 –16l/m @25 ºC rise
20 –20l/m @25 ºC rise
26 –26l/m @25 ºC rise
Gas Type
N –Natural
P - Propane
F –Frost protection
Colour
J –Joey Grey
SPECIFICATIONS
Power consumption (Watts)
Model
Anti-frost OFF
Anti-frost ON
12L –Natural gas
33
101
12L –Propane gas
36
104
16L –Natural gas
38
106
16L –Propane gas
40
108
20L –Natural gas
44
112
20L –Propane gas
50
118
26L –Natural gas
54
122
26L –Propane gas
59
127

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SPECIFICATIONS continued
Model size
12L
16L
20L
26L
Nominal gas consumption
(MJ/h)
Nat Gas
94
126
157
199
Propane
Min gas consumption
(MJ/hr)
Nat Gas
12
Propane
Injector orifice No. x Dia.
(mm)
Nat Gas
20 x 1.55 / 20 x 1.03
Propane
20 x 1.10 / 20 x 0.73
Min inlet gas pressure
(kPa)
Nat Gas
1.13
Propane
2.75
Max burner gas test
pressure (kPa)
Nat Gas
0.38
0.40
0.57
0.92
Propane
0.40
0.43
0.62
0.98
Min burner gas test
pressure (kPa)
Nat Gas
0.15
Propane
0.19
Max inlet gas pressure (kPa)
3.5
Ignition System
Continuous spark
Minimum working water pressure (kPa)
120
Maximum working water pressure (kPa)
1000
Relief Valve Pressure (kPa)
1750
Heating capacity (L/min @ 40°C rise)
7.5
10
12.5
16.2
Output (kW)
21
27.9
34.9
45.3
Gas inlet connection
R¾ /20
Water inlet and outlet connections
R¾ /20
Model Size
Factory Preset Temp.
Max. Temp.
Natural Gas
Propane
12L
60°C
75°C
874812NF
874812PF
12L
*48°C
54°C
876812NF
876812PF
16L
60°C
75°C
874T16NF
874T16PF
16L
*48°C
54°C
876T16NF
876T16PF
20L
60°C
75°C
874820NF
874820PF
20L
*48°C
54°C
876820NF
876820PF
26 L
60°C
75°C
874T26NF
874T26PF
26 L
*48°C
54°C
876T26NF
876T26PF
* Hot water delivery temperature is 48°C but displayed as 50°C. As permitted in AS 3498-
2009, delivery temperature can be adjusted above 50°C by installers. This allows for the
outlet temperature to be increased (offset) to compensate for temperature losses in the
pipework, between the water heater outlet and sanitary fixtures.

TM090 12-26 Series II CFGWH Service Instructions
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SPECIFICATIONS continued
Accessories
12L
16L
20L
26L
Kitchen Controller P/N 299853
Y
Bathroom 1 Controller P/N 299854
Y
Bathroom 2 Controller P/N 299855
Y
Deluxe Kitchen Controller P/N 299861
Y
Deluxe Bathroom 1 Controller P/N 299862
Y
Deluxe Bathroom 2 Controller P/N 299863
Y
Kitchen controller cable P/N 299856
Y
Bathroom controller cable P/N 299857
Y
Recess box
Y
Pipe cover
Y
Flue diverter kit
Standard P/N 299287 –NG models only.
Y
Y
N
Y
Extended P/N 299285 –26L NG model only
N
N
N
Y
Ez-Link Kit
P/N 299291
Y
EziSET® Kit
P/N 052310
Y (50oC models only)
Product Changes
EziSET®- Smartphone Remote Control
EziSET®enables remote control of a CF water heater via a smartphone where the hot water
temperature set point and bath fill features can be controlled by the user through an App
installed on their own personal smartphone. Additionally, any applicable fault codes and
service contact details will be displayed on the App in the event of a heater fault.
EziSET®is not provided as standard with the CF heater, it is an optional extra that is
available to purchase in kit form that is to be retro-fitted to a new or existing installation.
Available from February 2019 using part number 052310 the kit is suitable for use with 50oC
models only (suitable for use with 876812 / 876T16 / 876820 / 876T26 models manufactured
from 2018).
The kit is required to be installed by a qualified technician; it includes a PCB that is to be
fitted inside the water heater and a Power Line Telecommunication (PLT) plug that is to be
connected to a GPO and wireless router in the home (wireless router is not supplied however
any home with an existing Wi-Fi network will have one).
The householder is responsible for the download of the free EziSET®App to their own
compatible smartphone. Must have a minimum operating system of iOS 8.1 (iPhone 5 or
later; excluding iPhone 5C) or Android 4.0 or later (Windows phone is not compatible).
Up to 10 devices can simultaneously communicate with an EziSET®enabled heater
however only one user at a time can have priority control and alter heater settings.
The conventional hard-wired remote temperature controllers will continue to be available for
use where a home Wi-Fi network or a compatible mobile device are not available.

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
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WIRING DIAGRAM

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
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PRESET TEMPERATURE ADJUSTMENT
Voltages up to 240 volts will be present within the water heater, take care
not to touch wiring terminals. Use an insulated tool when operating the DIP
switches or MIN and MAX buttons.
If this water heater is used as an in-series booster for a solar water heater it
must have the outlet temperature set at 70ºC in order to comply with the
requirements of AS 3498.
To adjust the preset temperature:
1. Remove the front cover from the water heater.
2. Turn DIP SWITCHES 3 and 4 on (up position). Refer to area
‘D’ on page 32 for dip switch location. The current preset
temperature is displayed on the OK Monitor.
3. Press the MIN or MAX button, located under the DIP Switches, until the desired
temperature is displayed. Available temperatures are:
Rheem 874 Series / Solahart 60° models:
38ºC, 40ºC, 42ºC, 43ºC,48ºC, 50ºC, 55ºC, 60ºC, 65ºC, 70ºC and 75ºC.
Rheem 876 Series 50° models:
38ºC, 40ºC, 42ºC, 43ºC, 45ºC, 48ºC, and 50ºC.
Turn DIP SWITCHES 3 and 4 off (down position). The temperature displayis now turned
off.
4. Refit the front cover to the water heater.
FINE TEMPERATURE ADJUSTMENT
The maximum outlet temperature of a 48ºC model may be adjusted to compensate for
temperature losses in the pipe work between the water heater outlet and sanitary fixtures.
After adjustment, the water temperature from the first tap in the hot water pipe work after
the water heater used for personal hygiene purposes, such as in a bathroom or ensuite
MUST NOT exceed:
48°C if a temperature controller is connected to the water heater, or
50°C if a temperature controller is not connected to the water heater.
If there is a tap, such as a kitchen or laundry tap, in the hot water pipe work between the
water heater and the first tap used for personal hygiene purposes, then it is possible for a
water temperature to be delivered from that tap of up to 3°C higher than the setting shown
on the controller.
It is necessary to have the electrical supply to the water heater switched on during stages
of the outlet temperature compensation adjustment procedure.
Note: The preset outlet temperature setting of the water heater must be set at 48°C prior to
the commencement of this procedure.
ON
OFF

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Voltages up to 240 volts will be present within the water heater, take care
not to touch wiring terminals. Use an insulated tool when adjusting
settings.
1. Switch DIP SWITCH 3 to the on (up) position on the PCB.
2. Push the MAX button to increase outlet temperature set point. Continue to press MAX
button until correct temperature is achieved at first tap used for personal hygiene
purposes. The maximum outlet temperature setting is 54ºC.
3. Once correct temperature set point is selected, switch DIP SWITCH 3 to the off (down)
position on the PCB.
SEQUENCE OF OPERATION
Refer to ‘Sequence of Operation Component Diagram’ on page 11 to view components
shown in brackets e.g. (1)
1. When a hot water tap (1) is opened, cold water (or preheated water if a solar preheater
is installed) enters the water heater and passes through the Water Flow Sensor (3) and
Heat Exchanger (19). Note: the inlet water temperature must be less than or equal to
58ºC and less than or equal to the set point temperature minus 2ºC for operation to occur
past this point; otherwise water will pass straight through the heat exchanger and fan and
burner operation will not occur (for more information on this subject refer to the section
titled ‘In-series Gas Boosting’ on page 12).
2. The Water Flow Sensor (3) sends a pulse signal to the PCB (27). Once the pulse signal
reaches a pre designated frequency (at minimum flow rate) the PCB (27) activates the
Fan Motor (25) and the Fan (24) starts rotating.
3. After the Fan (24) completes a pre purge, the Gas Inlet Solenoid Valve (9) is activated.
Then Step 1 - Gas Solenoid Valve 2 (11) is activated, the Proportional Gas Flow
Regulating Valve (13) adjusts the gas flow rate through Steps 2 –6, to ensure adequate
gas for ignition and gas is then supplied to the Burner (15). (See page 11 Stepping gas
rate change sequence).
4. At the same time the Gas Solenoid Valves open the Igniter (16) starts sparking
continuously and ignites the gas at the Burner (15). After the flame sensor (18) detects
burner flame, the Proportional Gas Valve (13) begins to control the gas flow rate. If there
is a difference between the hot water temperature detected by the Hot Water Outlet
Thermistor (6) and that set on the water heater or selected on the remote controller (if
fitted) the PCB (27) adjusts the hot water temperature by opening and closing the Gas
Solenoid Valves 1 (10), 2 (11) and 3 (12) and adjusting the Proportional Gas Flow
Regulating Valve (13). The water flow rate is also adjusted via the Water Flow Servo
Motor (7) to ensure the selected temperature of hot water is delivered.
5. As the gas flow rate, controlled by the Proportional Gas Flow Regulating Valve (13)
changes the PCB (27) varies the speed of the Fan Motor (25) to maintain the correct air
gas mix ratio.
6. When the hot tap (1) is closed, the pulse signal from the Water Flow Sensor (3) stops
and the burner flame is extinguished by closing Gas Solenoid Valves 1 (10), 2 (11), 3
(12) and the Gas Inlet Solenoid Valve (9). The post purge operation then commences.
7. Once the post-purge operation ends (up to 6 minutes) power to the Fan Motor (25) is cut
and the Fan (24) stops.

TM090 12-26 Series II CFGWH Service Instructions
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Sequence of Operation Component Diagram
1
Hot Water Tap
2
Bypass pipe
3
Water Flow Sensor
4
Inlet Water Temperature Thermistor
5
Combustion Chamber Thermistor
6
Outlet Water Temperature Thermistor
7
Water Flow Servo Motor
8
Water Filter (Strainer)
9
Gas Inlet Solenoid Valve
10
Gas Solenoid Valve 1
11
Gas Solenoid Valve 2
12
Gas Solenoid Valve 3
13
PGFR Valve
14
Nozzle
15
Burner
16
Igniter
17
Igniter Electrode
18
Flame Sensor
19
Heat Exchanger
20
Over Temperature Limiter
21
Exhaust (Flue) Outlet
22
Combustion Chamber
23
Anti Frost Heater (Models with F in
model number only e.g. 874826NF)
24
Fan
25
Fan Motor
26
Drain Plug With Relief Valve.
27
PCB
Burner Configuration (Burner Change-Over Assembly)
Burner 1
Burner 2
Burner 3
Centre Solenoid (S.V. 2)
Left Solenoid
(S.V. 1)
Right Solenoid
(S.V. 3)
Stepping gas rate change sequence by solenoid
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
SV. 2 ON
SV. 3 ON
SV. 2 & 3 ON
SV. 1 ON
SV 1 & 2 ON
SV 1,2 & 3 ON
Flame Sensor Status
Power
0
1
2
3
4
5
6
R0y Information
00
01
01
01
10
11
11
Flame Sensor 1
X
O
O
O
X
O
O
Flame Sensor 2
X
X
X
X
O
O
O
Solenoid Valve1
OFF
OFF
OFF
OFF
ON
ON
ON
Solenoid Valve2
OFF
ON
OFF
ON
OFF
ON
ON
Solenoid Valve3
OFF
OFF
ON
ON
OFF
OFF
ON
X = Flame sensor is not detecting flame. O = Flame sensor is detecting flame

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ANTI-FROST HEATER CIRCUIT
The 5 anti-frost heaters are wired in series and are controlled by the ambient air sensor and
the PCB. All models have a 68-watt anti-frost system.
A thermistor, sensing ambient air temperature, positioned in the wiring loom near the bottom
of the water heater, activates the anti-frost heaters when the ambient air temperature falls
to 4ºC +4ºC/-2ºC and deactivates the anti-frost heaters when the temperature rises above
12ºC.
In the event a heater block becoming open circuit the total heater circuit is rendered
inoperable. The total heater circuit measures 850 + 5% ohms.
Refer to Procedure 12 on page 56 for replacement procedure.
IN-SERIES GAS BOOSTING
Temperature controllers must not be fitted if this water heater is installed
as part of a solar water heater system because water at a temperature
much higher than the controller setting can be delivered.
Rheem 874 series & Solahart 60° models may be used as in-series booster water heaters
to a solar preheat water heater. When the inlet water temperature is 58°C or higher the fan
and burner will not operate despite water flowing through the heat exchanger. When the
inlet water temperature is less than or equal to 57°C the burner will fire and boost the outlet
temperature to the preset outlet temperature setting provided the flow rate is greater than 3
litres per minute.
In this application the preset outlet temperature setting of the heater must be set at 70C to
comply with the requirements of AS3498. Refer to page 9 for details on checking and
adjusting the preset outlet temperature.
In-series gas boosting Solar Loline Installation

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In-series gas boosting Solar Hiline Installation
TEMPERING VALVES
Where a tempering valve is fitted and there is not
a separate untempered line for the kitchen or
laundry areas, the Kitchen temperature controller
will be able to display temperatures above 50oC
however the delivered water temperature at the
tap will be that set by the tempering valve which
will be no hotter than 50oC.
To enable delivery of hot water at temperatures
above 50oC a separate untempered line must be
provided that supplies hot water exclusively to
kitchen and laundry areas (refer to diagram
below).



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REMOTE CONTROLLERS
Continuous flow gas water heaters can befitted with optional remote temperature controllers
as long as they are not being used in conjunction with a solar system.
There are 3 types of remote controller that can be used, standard, deluxe or EziSET®.
Standard and deluxe controllers are hard wired whereas EziSET®is a Smartphone based
remote temperature control (Note: EziSET® is not to be used with hard wired controllers).
Controller
Type
Bathroom 1
Controller
Bathroom 2
Controller
Kitchen
Controller
Kitchen
Cable 20m
Bathroom
Cable 20m
Standard
299854
299855
299853
299856
299857
Deluxe
299862
299863
299861
EziSET®
052310
NA
NA
Hard Wired Controllers:
Standard and deluxe controllers cannot be mixed in a single installation; an individual water
heater must have ALL standard or ALL deluxe type controllers fitted, other manufacturers’
controllers cannot be used.
Deluxe temperature controllers offer additional functions compared to standard temperature
controllers:
A Bath-Fill auto-stop function allows the bath-fill volume and temperature to be set,
once the selected volume of water has passed through the water heater the water
servo motor closes, preventing any further flow of hot water.
An Assistance call button provides a voice or alert tone when pressed that is audible
on all controllers.
One, two or three controllers can be installed, however if a Bathroom controller is installed
without a Kitchen controller then the maximum selectable hot water temperature will be
limited to 50oC when connected to an 874 model or 48oC (displayed as 50oC) when
connected to an 876 model.
876 Models are factory set and limited so that they cannot deliver water hotter than 48oC.
When no hot water is flowing, temperatures can be selected between 37oC and 50oC by
pressing and holding the temperature control buttons, to select temperatures above 46oC
press the temperature control button once for each selection.
A controller must be turned on and must display the ‘ACTIVE’ indicator in order to allow
adjustment of water temperature.
When hot water is flowing, the temperature can be increased from 37oC to 46oC only.
The water temperature can be decreased from any setting whether hot water is flowing or
not.

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Standard Controller
Note 1: If one or more controllers are installed, at least one must be on for the water heater
to operate. If all controllers are off the water heater will only deliver cold water.
Note 2: The water volume button is active only on the kitchen controller
Selectable Temperatures:
Kitchen Controller:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50*, 60oC*
Bathroom Controllers:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50oC
* Temperatures above 48 degrees are not available on 876 series as these units have a
maximum selectable temperature of 48oC at all locations.

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ON / OFF button
This button must be pressed once to turn on the controller. The light
in the button will glow when the controller is on. A controller cannot
be turned on if water is flowing from a hot tap. To turn off a controller,
press the on / off button once. The light will go out. A controller can
be turned off whilst water is flowing.
Priority light
This light will glow on a controller when that controller has priority.
The Bathroom controller(s), if they are turned on, have priority over
the Kitchen controller. Priority means that controller has control of
the water heater temperature setting. The water temperature setting
can only be adjusted by the controller that has priority.
In use light
This light will glow on all controllers, whether they are on or off, when
hot water is flowing, regardless of which controller has priority.
Display panel
The current temperature setting is displayed on all controllers
(whether hot water is flowing or not), when any controller is on. If all
controllers are off, then the display remains blank. The water volume
can also be displayed on the Kitchen controller. The x10lsymbol
glows when the water volume is displayed.
(up button)
The up button increases the temperature setting.
(down button)
The down button decreases the temperature setting.
water volume button
(Kitchen controller only) –This feature enables an alarm to sound
when a set volume of water has flowed through the water heater
(refer to notes below).
Water volume notes:
The water volumefunction is designed towarn, by abeeping sound, thata certain volume
of water has been delivered from the water heater. It does not stop either the flow of
or the heating of water.
The Kitchen controller does not require priority nor to be on in order to set the water
volume function.
The water volume function can be set whilst a hot tap is open.
The water volume alarm will only sound from the kitchen controller.
The factory preset water volume is 180 litres.
To turn off the water volume function before the alarm sounds, press the water volume
button twice.
The water volume is measured as the water flows through the water heater. Therefore if
more than one hot tap is open, the alarm will respond to the total water volume drawn
from all taps and the expected water volume from the first tap will be decreased.
If the hot tap is closed before the set water volume flows through the water heater and
the water volume button is left on, then the alarm will sound when the remaining water
volume is consumed during a later operation. To prevent the alarm from sounding,
press the water volume button twice to turn it off.

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
17
Deluxe Controller
Note: If one or more controllers are installed, at least one must be on for the water heater to
operate. If all controllers are off the water heater will only deliver cold water.
Selectable Temperatures:
Deluxe Kitchen Controller:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48*, 50**, 60oC*
Deluxe Bathroom Controllers:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48*, 50oC
Bath-Fill Mode –All Deluxe Controllers:
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48oC
* Limited to 48oC when the bath fill function is set with 874 and 876 series models
** Limited to 48oC when 50oC is displayed with 876 series models

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
18
Deluxe Controller Functions
ON / OFF button
Press once to turn on the controller. The button will glow when
the controller is on. A controller cannot be turned on if water is
flowing from a hot tap. Press the button to turn off the
controller. A controller can be turned off whilst water is flowing.
Bath-Fill button
Initiates Bath-Fill mode and once pressed will display the last
used Bath-Fill water volume in litres and the last used Bath-Fill
temperature in °C. The displayed Bath-Fill water volume and
temperature can be adjusted by using the Bath-Fill water
volume and temperature control buttons located beneath the
hinged panel
Bath-Fill operating light
Illuminates whenever Bath-Fill mode is in operation.
Bath-Fill Temperature
(up button)
Increases the Bath-Fill temperature setting.
Bath-Fill Temperature
(down button)
Decreases the Bath-Fill temperature setting.
Bath Fill Water Volume
(up button)
Increases the Bath-Fill water volume setting in increments of
10 litres up to 500 litres. A further setting of 990 litres can be
selected
Bath Fill Water Volume
(down button)
Decreases the Bath-Fill water volume setting
Assistance Call button
When pressed sounds a message or alert tone on the Kitchen
Controller indicating that assistance is required in the
bathroom.
Bath-Fill Water Volume
display
Displays the selected Bath-Fill water volume in litres. The
quantity of water can be adjusted using the Bath-Fill Water
Volume adjustment buttons located beneath the hinged panel
Heater Operating light
Illuminates on all controllers when hot water is flowing
Heater ACTIVE light
Illuminates when that controller is ‘active’. The Bathroom
controller when turned on, have priority over the Kitchen
controller. Priority means that a controller has control of the
water heater temperature setting. The water temperature
setting can only be adjusted by the controller that is displaying
the ACTIVE message.
Temperature Display
Displays the current temperature setting on all controllers in
°C when any controller is on. If all controllers are off the display
remains blank.
(up button)
Increases the general purpose temperature setting.
(down button)
Decreases the general purpose temperature setting.

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
19
BATH FILL OPERATION
Bath Fill switch ON Operation Flow Chart 4
YES
YES
YES
YES
Bath Fill lamp ON
A B
Bath Fill Operation
Hot water volume
indicatorON
Hot water volume ON
Hot water temp
Indicator ON
NO
YES
Combustion cease
65 Flashing
Bath Fill lamp OFF
Hot water tapclosed
Bath Fill lamp OFF
Hot water volume
Indicator OFF
Hot water volume OFF
Hot water temp
Indicator OFF
This section applies only when a
‘ Deluxe Remote Controller’ is installed
NO
Combustion
NO
NO
Bath Fill lamp flashing
Hot water volume
Indicator OFF
Hot water volume OFF
Hot water temp
Indicator OFF
Water flow control
valve closed
Waterflowcontrol
valve open
Bath Fill operation
finished
YES
NO
YES
Hot water tapopen
Bath fill switch
ON within 6 hrs.
Bath Fill switch
OFF?
Water flow control
valve closed
Set water volume
≤ flow volume
Bath Fill switch
OFF?
NO
B
45 sec later

TM090 12-26 Series II CFGWH Service Instructions
REV AB –Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
20
EziSET®Smartphone Remote Controller:
Title Screen
Main Display
with Priority
Main Display
without Priority
EziSET®not
detected by App
Figure 1
Figure 2
Figure 3
Figure 4
Up to 10 mobile devices can simultaneously communicate with an EziSET®enabled heater
however only one user at a time can have priority control and alter heater settings. The user
that depresses the ‘HOT WATER’button first will assume the priority control and will be able
to adjust temperature settings using the temperature increase (+) / decrease (-) buttons as
shown in figure 2 above. Any additional devices will be able to view the current set point
temperature but will not be able to make any adjustments as the temperature increase /
decrease buttons will not be displayed and the temperature dial will not be illuminated (refer
figure 3).
The mobile device that has priority can give up priority by pressing the ‘HOT WATER’button
or will automatically lose priority after a default period of 5 minutes of non-use (the non-use
session timeout time can be adjusted from the SETTINGS page if desired). At this point
priority may be assumed by another device by depressing the ‘HOT WATER’button.
The ‘Scan’ button appears when the App cannot detect EziSET® on network (refer figure
4). Press ‘Scan’ to start searching for EziSET on the network again. Once EziSET® is
detected the App will automatically connect and figure 3 will be shown.
The maximum selectable hot water temperature will be limited to 50oC. When no hot water
is flowing, temperatures can be selected between 37oC and 50oC.When hot water is flowing,
the temperature can be increased from 37oC to 43oC only. The water temperature can be
decreased from any setting whether hot water is flowing or not.
Bath Fill function: The water volume is measured as the water flows through the water
heater. Therefore if more than one hot tap is open the expected water volume from the first
tap will not be delivered before hot water flow ceases.
NOTE: The Rheem EziSET®App is available from the App or Play Store and is compatible
with a smartphone that has a minimum operating system of iOS 8.1 (iPhone 5, excluding
iPhone 5C) or Android 4.0 and later (Windows phone is not compatible).
Should the home be supplied by 3-phase power, the wireless router and the water heater
MUST be connected to the same phase for EziSET® to operate correctly.