Rinnai INFINITY A-Series User manual

INFINITY EF26 and A-Series continuous flow water heaters
Installation guide
Suitable for the following Rinnai INFINITY models:
• A16 (REU-A1620WG-ZK)
• A20 (REU-A2024WG-ZK)
• A24 (REU-A2426WG-ZK)
• A26 (REU-A2626WG-ZK)
• EF26 (REU-E2626W-ZK)

Important
This appliance must be installed in accordance with:
-Manufacturer’s installation instructions
-Current AS/NZS 3000, AS/NZS 3500, AS/NZS 5601.1 and G12/AS1
For use with Natural Gas or Universal LPG as indicated on the
appliance.
Not suitable as a spa or swimming pool heater.
Not suitable for hydronic applications.
Not suitable for commercial or solar applications.
Not suitable for locations greater than 1000 m above sea level.
Appliance must be installed, commissioned and serviced by an
authorised person, being in New Zealand a licensed gastter.
Warning
Improper installation, adjustment, alteration, service and maintenance
can cause property damage, personal injury or loss of life.
For more information about buying, using, and servicing of Rinnai
appliances call: 0800 RINNAI (0800 746 624).
Rinnai New Zealand Limited
105 Pavilion Drive, Mangere, Auckland
PO Box 53177, Auckland Airport, Auckland 2150
Phone: [phone]
Fax: [phone]
Email: [email protected]
Web: rinnai.co.nz
youtube.com/rinnainz
facebook.com/rinnainz

Specication .........................................................4
Connections and ttings .......................................5
Dimensions...........................................................6
Appliance location ................................................8
General installation information............................9
Water delivery temperature ..................................10
Controller installation............................................11
EF26 condensate neutraliser tank and drain........12
Commissioning.....................................................14
Sideways ue diverter dip switch changes...........15
PCB interface and functions.................................16
A-Series controller communication cables ...........18
EF26 controller communication cables.................19
Contents
Before installation
Unpack the appliance and check for damage. DO NOT install any damaged
items.
Check all components and that the correct gas type has been supplied.
Get an overview of the steps required before starting the installation. Failure to
follow these instructions could cause a malfunction of the appliance. This could
result in serious injury and property damage.
These instructions apply only to the continuous ow water heater models listed on
the front of this guide.

4 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
Specication
Designed and made in Japan, the Rinnai INFINITY EF26 and A-Series are continuous ow
gas hot water heaters with inbuilt frost protection. The EF26 is a condensing model. They have
electronic ignition and require electricity to operate. They are factory preset to 55 °C (maximum set
temperature is 65 °C).
Scope of use
Suitable for residential applications only. They are designed to be externally mounted on an
outside wall and located as close as practicable to the most frequently used hot water outlet(s), to
reduce the delay for hot water delivery.
They are not suitable as a spa or swimming pool heater, and for hydronic heating. They are also
not suitable as a gas boost for solar installations as the temperature cannot be set high enough.
Hard or acidic water will need to be treated to use this product.
Specication summary
A16
REU-A1620WG-ZK
A20
REU-A2024WG-ZK
A24
REU-A2426WG-ZK
A26
REU-A2626WG-ZK
EF26
REU-E2626W-ZK
Thermal e󰀩ciency 80.5% 80.5% 81% 80.5% 91.5%
Hot water capacity 1.5-20 L/min 1.5-24 L/min 1.5-26 L/min 1.5-26 L/min 1.5-26 L/min
Hot water capacity at a
25° rise
16 L/min
960 L/h
20 L/min
1200 L/h
24 L/min
1440 L/h
26 L/min
1560 L/h
26 L/min
1560 L/h
Input 16.3-124 MJ/h 19.9-156 MJ/h 16.3-184 MJ/h 16.3-199 MJ/h 16.3-175 MJ/h
Output 27.8 kW 34.9 kW 42.0 kW 44.5 kW 44.5 kW
Weight 13 kg 14 kg 15 kg 15 kg 18 kg
Water, nominal
operating pressure
120-1000 kPa 160-1000 kPa 200-1000 kPa 200-1000 kPa 220-1000 kPa
Ingress protection IPX4 IPX4 IPX4 IPX4 IPX5
Power consumption:
- Normal
- Standby
- Frost protection
47 W
2 W
68 W
58 W
2 W
68 W
56 W
2 W
68 W
65 W
2 W
68 W
63 W
2 W
92 W
Safety devices
• Flame failure
• Boil-dry protection
• Overheat protection (OHS)
• Fusible link
• Pressure relief valve
• Combustion fan rpm check
Line pressures
• NG 1.13-3.0 kPa
• LPG 2.75-3.0 kPa
The maximum line pressure is 3.5 kPa, with the maximum standing pressure under abnormal
intermittent conditions 5.0 kPa. In the case of commercial metering (i.e. 35-37 kPa coming in),
there may be a requirement to regulate the incoming line pressure down.

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 5
Connections and ttings
Cable access Cold water inlet
Gas connection
Power supply cable
Hot water outlet
62 (gas)
53 (cold)
110.4 (cable)
72 (hot)
36 10
105 83
335.6
Hot Cold Gas Condensate
A16 external REU-A1620WG-ZK R½ (15 mm) R½ (15 mm) R¾ (20 mm) N/A
A20 external REU-A2024WG-ZK R¾ (20 mm) R¾ (20 mm) R¾ (20 mm) N/A
A24 external REU-A2426WG-ZK R¾ (20 mm) R¾ (20 mm) R¾ (20 mm) N/A
A26 external REU-A2626WG-ZK R¾ (20 mm) R¾ (20 mm) R¾ (20 mm) N/A
EF26 external REU-E2626W-ZK R¾ (20 mm) R¾ (20 mm) R¾ (20 mm) R½ (15 mm)
From bottom of unit:
• Hot 41 mm (A16 39 mm)
• Cable 29 mm
• Gas 40 mm
• Cold 50 mm
From bottom of unit:
• Hot 41 mm
• Cable 26 mm
• Gas 38 mm
• Cold 50 mm
Neutraliser drain outlet
Neutraliser tank drain valve
Hot water outlet
Cold water inlet
Cable access
Power supply cable
Gas connection
47.8 (cold) 46.4 (gas)
122 (drain)
88.1 (hot)
335.6
126.8 83
720
Service connection points
An approved full ow isolation valve and disconnection union MUST BE tted to the cold water
inlet. A non-return valve is not required unless stipulated by local regulations.
Isolation valves MUST NOT be tted directly the appliance.
It may be necessary to t a temperature limiting device for delivery to areas used primarily for the
purposes of personal hygiene, refer page on ‘Water delivery temperature’ for more information.
Purge gas and cold water supply lines to remove air and swarf before nal connection. Swarf in the
gas or water supplies may cause damage, a common problem, which is not covered by warranty.
A-Series
EF26

6 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
Dimensions (mm)
351
330
270
259
531
498 16.5
15 48.9
16.5
734
270
351
330
223
212
531
498 16.5
15 48.9
16.5
270
34 7
351
330
175.5
164.5
16.5
498
17.7
15 48.9
16.5
270
531
734
A26 & A24 A20
A16
351
330
180
16.5
44.412
498
734
16.5
270
531
16
EF26

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 7
1719.1 15
29.5
495.8
571.2
180
160
80
5.5 x 24
long hole
5.5 x 24
long hole
Ø13 hole
41
34
31
489.2
541.2 557.2
439.9
19113.9 15
446
495.8
565.2
30.5
495.2 535.2
35
28
25
180
160
80
5.5 x 16
long hole
5.5 x 24
long hole
Ø13 hole
551.2
A-Series
EF26

8 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
Appliance location
This appliance is designed for outdoor installations only. It MUST BE located above ground in open
air with natural ventilation, without stagnant areas, where gas leakage and products of combustion
can be rapidly dispersed by wind and natural convection.
This appliance MUST BE placed as close as possible to the most frequently used hot water
outlet(s) to minimise the delay for hot water delivery1. For installations where the distance between
the water heater and outlets is considerable, a ow and return system can be used to minimise the
waiting time for hot water delivery. Alternatively multiple appliances can be strategically placed to
serve outlets with minimal delay.
An AC 230 V, 10 A earthed power point must be provided adjacent2to the appliance. This power
point must be weatherproof. It must be clear of the gas and water connections to the appliance
and also the ue exhaust and water pressure relief valve. The power cord of the appliance is 1.5 m
long.
All appliances MUST BE installed to ensure access can be gained without hazard or undue
di󰀩culty for maintenance and servicing. Su󰀩cient clearances shall allow access and removal of all
serviceable components. Appliances should not be mounted more than 2.5 m above the ground
or oor level unless the customer can arrange permanent and safe access, or can provide another
means of safe access.
The appliance MUST BE mounted on a vertical structure with the water and gas connections on
the underside pointing downwards.
Location of the ue terminal MUST BE in accordance with Section 6 and Figure 6.2 of AS/NZ 5601.
The E26 / A-Series are suitable for installations up to 1000 m above sea level. They are not
suitable for alpine areas.
Horizontal obstructions
AS/NZS 5601 states a minimum horizontal clearance of 500 mm between a building structure and
obstruction facing the terminal. At 500 mm the obstruction needs to be the full height of the unit,
as shown below, and not a partial obstruction. A partial obstruction of less than 1 m could result in
wind pushing the ue gases back into the ue terminal.
1Rinnai recommend a maximum pipe run of 10 m.
2Power point can be within the pipe cover if a pipe cover is installed—must comply with AS/NZS Wiring rules
500mm
Minimum obstruction
height to be no less than
top of appliance
There MUST be NO partial obstructions to the appliance front cover or any other part of
the appliance casing. This will avoid the appliance from failing to operate under windy
conditions.
IMPORTANT

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 9
General installation information
Securing the Rinnai INFINITY
The wall structure on which units are mounted
MUST BE capable of supporting the weight of
the appliance and associated pipe work.
Ensure that suitable xing screws or bolts
are used to secure the unit to the wall, in
accordance with AS/NZS 5601 section 6.
Wooden plugs shall not be used.
The top bracket has a keyhole slot so that the
appliance can be positioned by hanging it on
one screw. Once in position the appliance can
be secured with appropriate xings.
The appliance can be mounted directly against
the wall or structure. There is no need to use
non-combustible sheeting or leave an air gap
between the appliance back panel and the wall
or structure to meet the temperature hazard
requirements of AS/NZS 5601.
Pipe sizing
If the gas pipe sizing is insu󰀩cient the
appliance won’t perform properly. Gas pipe
sizing must consider the gas input into this
appliance as well as other gas appliances in
the premises. The gas meter and regulator
must be specied for this gas rate.
An approved sizing chart such as the one
in AS/NZS 5601 should be used. Refer
specication for gas consumption details.
Water pipe sizing and layout should be
performed in accordance with AS/NZS 3500.
All hot water pipe work should be insulated to
optimise performance and energy e󰀩ciency.
Water supply
The appliance is intended to be permanently
connected to the water mains.
Refer specication for operational water
pressure limitations. Approved pressure limiting
valves may be required if the maximum rated
water supply pressures are exceeded. To
achieve the rated ow, the minimum water
supply pressures must be met.
The water heaters will operate at lower
pressures but will not achieve the rated ow.
Contact Rinnai for gravity fed or low pressure
installations.
Water chemistry and impurity limits are detailed
in the operation guide within the warranty
section. Most metropolitan water supplies fall
within these requirements.
If you are unsure about the water quality
contact your water authority. If sludge or foreign
matter is present in the water supply, a suitable
lter or strainer is required in the water supply
to the water heater to prevent unwarranted
damage and loss of performance.
Frost protection
Frost protection operates automatically, as
long as the appliance is connected to the
electrical power supply, by activating when the
temperature inside the unit drops below
3.5 °C1, and turns o󰀨 once the temperature
inside the unit reaches 7 °C1.
1Approximate temperatures
Frost protection thermistor
The EF26 and A-Series models have an
external thermistor to control frost protection. It
is a small black indicator located on the bottom
right hand side of the unit, directly underneath
the cover screw (circled below). The frost
protection thermistor needs to be exposed to
the outside air to correctly function—do not
insulate the frost protection circuit will not work
correctly.

10 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
Water delivery temperature
Requirements of AS/NZS 3500 MUST BE considered regarding the temperature limitations of hot
water supplied to areas used primarily for personal hygiene. The temperature of these areas may
be limited to 55 °C or less.
If the appliance is to deliver water primarily for the purposes of personal hygiene in an early
childhood centre, school, nursing home or similar facility as dened in AS/NZS 3500.4, a
Temperature Limiting Device (TLD), such as a tempering valve may be required, even if the
appliance is set to 55 °C or less. For these types of applications contact Rinnai.
Requirements for Rinnai INFINITY units installed without controllers
Diagram 1 - 55 °C Appliance
55 °C
Diagram 2 - Not a 55 °C Appliance
(TLD = Temperature Limiting Device)
Hot Cold Gas
Ensuite
Laundry
Bathroom
Kitchen
Hot Cold Gas
Kitchen
> 55 °C
Laundry
> 55 °C
Ensuite
< 55 °C
Bathroom
< 55 °C
TLD
When the Rinnai INFINITY is set to deliver water at a temperature higher than 55 °C, it will be
necessary to t a Temperature Limiting Device for delivery to areas used for the purposes of
personal hygiene.

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 11
Controller installation
The maximum number of controllers that can be tted is four, refer water controller congurations
section below.
General information
Other manufacturers water controllers are NOT compatible with Rinnai water heaters. Water
controllers MUST NOT be used with any solar boost water heater. Rinnai water controllers bought
in from other countries are not compatible with Rinnai appliances sold in New Zealand.
Water controllers and transceivers (for those with wireless controllers) DO NOT contain serviceable
parts and must only be serviced by an authorised person.
Master controller
Only one master controller can be designated as a ‘master’ water controller. This water controller
is normally used in the kitchen. The remaining controllers are ‘sub-controllers’ and are for use
in bathrooms, toilets, and laundries. The temperature limit for all sub-controllers is 50 °C, this is
a safety feature, to reduce the risk of burns in these areas. A master controller MUST NOT be
installed in a bathroom.
Water controller configurations
• A maximum of four Compact controllers (MC-601) can be fitted.
• Only one master controller can be installed. This can be a Kitchen Deluxe1(MC-100V), or any
other Compact controller (MC-601).
1When a Kitchen Deluxe controller is fitted, it will always function as a master controller, this is the default setting and cannot be
changed.
• In addition to a master controller, up to three additional controllers can be fitted
Controller location
• Do not install water controllers near a heat source, such as a cook top, stove or oven. Heat
steam, smoke, and hot oil may cause damage.
• Do not install water controllers outdoors unless protection from water/dust ingress and sunlight
are provided.
• Do not install water controllers in direct sunlight.
• Do not install water controllers against a metal wall unless the wall is earthed in accordance
with AS/NZS 3000.
• Water controllers must not be installed where chemicals such as benzene, alcohol, turpentine,
hydrogen sulphide, ammonia, chlorine or other similar chemicals are in use.
The water controller is water resistant, however excessive exposure to water may result in
damage. Durability is improved when positioned OUTSIDE the shower recess.
• Avoid direct exposure to water or steam as these may cause the controller to malfunction.
• Water controllers must be installed in shaded and clean locations. They should be fitted out of
reach of children (suggested height 1.5 m from the floor), and installed at least 400 mm above
the highest part of a sink, basin or bath.
When cleaning your water controller use only a damp cloth and mild detergent.

12 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
EF26 condensate neutraliser tank and drain
The Rinnai INFINITY EF26 water heater generates condensate continuously at a rate of up
to 5 litres per hour as a by-product of a highly e󰀩cient gas burner. This condensate has been
neutralised by having an inbuilt condensate neutraliser kit.
Important considerations for the neutraliser drain pipe
The content of AS/NZS 3500 ‘ Temperature / Pressure Relief and Expansion Control Valve Drain
Lines’ has been used as a guide in preparing the information below.
2°
D
B
A
C
E
A
NOT
Remove cap from condensate drain outlet
A. Water heater drain outlet connection, R½”
(15 mm) BSP male. Condensate / neutraliser
drain outlet connection, ½” (15 mm) BSP male
nylon.
N.B: The black plastic shipping cap MUST BE
removed from the condensate / neutraliser
drain outlet prior to water heater operation.
B. PE R½” BSP (15 mm) female to barbed
irrigation system connector (13-19 mm) or
equivalent plastic tting1.
C. Drain pipe and ttings to match B.
D. Continuous fall of at least 2° from water
heater to discharge point. Lengths and bends in
accordance with the table below.
Lengths and changes of direction
Max. length (m) 9 8 7 6
Max. changes of direction greater
than 45°
3 4 5 6
E. Suitable points of discharge are deemed to
be drains, sewers or pits. DO NOT discharge
onto electrical connections, earth stakes,
copper pipes, concrete paths or into a pond.
Installation
The drain line MUST NOT discharge onto
electrical connections, earth stakes, copper
pipes, concrete paths or into a pond.
The point of discharge from each drain
line shall be located so that the release of
condensate / neutraliser does not cause a
nuisance, is readily discernible and incurs no
risk of damage to the building.
There shall be no tap, valve or other restrictions
in any line.
Each line shall fall continuously from the valve
to the approved point of discharge.
Drain lines shall not discharge into a storage
water heater safe tray.
The end of the condensate line shall be:
• Not lower than 200 mm or higher than
300 mm above an unpaved surface; or
• Not lower than 75 mm, or higher than
300 mm above a gravel pit not less than
100 mm in diameter in a paved surface.
• Where discharging over a tundish or gully
trap, drain lines shall have an air gap of a
size at least twice the diameter of the drain
line.
1Non-PE plastics will fail over time due to contact with the acidic condensate. Damage caused by installation of non-PE plastics will not
be covered by warranty.

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 13
Interconnection of condensate drain lines
Condensate / neutraliser drain lines from multiple water heaters may be joined together provided
they conform with the requirements detailed on the previous page.
Common stack discharge
Where individual water heaters are installed in a multi-storey building, the condensate / neutraliser
drain lines may discharge into a common stack, subject to the following:
• The discharge from the common stack is to a tundish, having a discharge line, that is not
less than the size of the common stack, directly connected to a xture trap, and installed in
connection with any adjacent soil or waste stack.
• The discharge point of the common stack is such that any discharge is readily visible and will
not cause any nuisance.
• The common stack is vented by extending the pipe upwards, above the roof level.
Tundish drain lines
The drain line from any tundish shall not be less than DN 20 or less than one size larger than
that of the largest drain line discharging into a tundish. Tundish drain lines shall comply with the
requirements detailed on the previous page.
Areas subject to freezing
In areas where water pipes are prone to freezing, the drain pipe from any valve shall be insulated
and not exceed 300 mm in length. It shall discharge into a tundish through an air gap of not less
than 75 mm and not more than 150 mm measured from the outlet of the drain pipe to the rim of the
tundish.

14 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
Commissioning
AS/NZS 5601.1, clauses 2.6.8 and 6.11.2,
states that every part of a gas installation shall
be commissioned prior to initial use. It is the
installer’s responsibility to ensure all current
AS/NZS 5601 requirements are met. The URL’s
provided are links to short videos on how key
steps are performed.
The appliance operation must be tested
after installation. Ensure the building
occupants do not have access to the
hot water outlets during this procedure.
Please note
The Rinnai INFINITY EF26 and A-Series come
with a factory preset outlet temperature of
55 °C. The high and low gas operating
pressures are also factory preset. Under
normal conditions the operating pressures do
not require adjustment during installation. Make
adjustments ONLY if the unit is not operating
correctly and all other possible causes for
incorrect operation have been eliminated.
Inlet supply pressure to the appliance MUST
BE checked and set within the operating
parameters of the appliance in all instances.
If the appliance can not be adjusted to perform
correctly call 0800 RINNAI (0800 746 624) for
assistance.
WARNING
Commissioning steps
1Flush water pipes and
gas line
Before nal connection of the water heater , ush the gas, hot and cold water
supply lines. Swarf in the gas or water supplies may cause damage, a common
problem, which is not covered by warranty.
2Connect the gas line
3Purge the gas line of air
4Final connection test
5Check supply pressure
Operate ALL other gas appliances at their maximum rate. With all gas appliances
on maximum the supply pressure must read between 1.13-3.0 kPa on Natural gas
and on LPG 2.75-3.0 kPa.
If the pressure is lower, the gas supply is inadequate and the appliance will not
operated to specication. It is the installer’s responsibility to check the gas meter,
service regulator and pipe work for correct operation and sizing, and rectify as
required.
6PCB settings checked Refer sideways ue diverter information on the next page and the PCB interface
layout and functions page.
PCB settings checked if the factory default temperature has been changed.
Dip switch settings checked if a sideways ue diverter is tted.
Short video: http://rinnai.co.nz/007
7Operate and test for
gas leaks
Replace the appliance front cover otherwise the unit won’t operate correctly, and
operate and test for gas leaks using an electronic leak detector.
8Operational test Conrm the water ow and hot water delivery temperature using a thermometer.
If water controllers are tted, it is necessary to test their operation through the
complete range of functions, refer separate instructions provided with the water
controllers.

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 15
Sideways ue diverter dip switch changes
When delivered ex-factory, by default SW1, SW2, SW3, and SW4 of the DipSW are set to the OFF
position.
If a sideways ue diverter is installed onto the water heater, SW1 and SW3 of the DipSW must be
set to the ON position.
1234
ON
SW1 (OFF)
SW2 (OFF)
SW3 (OFF)
SW4 (OFF)
1234
ON
SW1 (ON)
SW2 (OFF)
SW3 (ON)
SW4 (OFF)
Default dip switch settings as
they are ex-factory.
Dip switch settings required for a
sideways flue diverter installation.
The dip switch change for a sideways ue diverter is required to increase the combustion fan
speed, which helps overcome the friction losses from having a sideways ue diverter installed on
the water heater.
9Check cold water inlet
lter
Inspect and clean the water inlet lter. This may need to be repeated to ensure
the lter remains clear, especially on new installations.
Short video: http://rinnai.co.nz/006
If you feel the customer is capable of doing this check it would be benecial to
show them how to inspect and clean the water lter as well.
10 Customer handover After testing is completed, explain to the customer the function and operation of
the water heater and water controllers (if tted).
Also talk to them about:
• The gas, power, and water connections
• How frost protection works
• Procedure for draining the water heater
• Where to nd the data plate
• Maintenance and servicing
If the customer is not there try and contact them by phone to discuss these
important points.
Ensure the installer details section is completed in the operation guide, the
commissioning checklist has been completed and signed, and that the guide and
checklist are left with the customer.

16 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
PCB interface and dip switch settings
The PCB interface and dip switch settings
must only be changed by a licensed gastter.
They have been provided as there may be
a requirement to change the temperature of
the water delivered from the water heater
of change the dip switch settings if tting a
sideways ue diverter.
Care must be taken when changing the
temperature or dip switch settings as
they can be easily switched or bumped
into the wrong position. Fully check the
operation of the water heater before
leaving including the temperature of the
water delivered.
The cover of the water heater will need to be
removed to carry out this operation. As this
will expose live mains voltage wiring please
disconnect the power supply before
removing the front cover.
We wish to draw your attention to the
requirements of the New Zealand Building
Code and compliance document G12. This
requires that water delivered to sanitary
xtures be no more than 55 °C. Increasing the
water heater set temperature will require that
you protect all sanitary xtures to which the
appliance is plumbed with suitable tempering
valves or something similar.
Rinnai will accept no liability for issues arising
out of the use of this information.
If you have any doubts about the performance
of the water heater, please contact Rinnai by
phoning 0800 RINNAI (0800 746 624).
The following information details settings for
the Rinnai INFINITY EF26 and A-Series models
only. They are not applicable for other models.
Basic operation of the PCB interface
• To place the PCB into programming mode
press PB2 until the LED digital display
shows 1, noting that the current set value
will be displayed shortly afterwards.
• To alter a value press PB4, each press
of the button will select the next available
value.
• To change to another menu, press PB3,
each press of the button will select the next
available menu.
• To exit the programming mode and save the
selected settings press PB2 until the LED
display goes blank.
Note:
• If no buttons are pressed the PCB will
automatically exit programming mode after
10 mins.
• Exiting programming mode sets the value
last viewed as the current value.
WARNING
8
ON
Communication interface socket
Data transfer button for PCB replacement - push button 1 (PB1)
Data transfer LED, illuminates to show data transfer in progress
MODE button, places the PCB into programming mode (PB2)
MENU button, cycles through available modes (PB3)
Forced combustion rate setting mode, raises the gas pressure
VALUE button, cycles through available values (PB4)
Forced combustion rate setting mode, lowers the gas pressure
Forced high/low selection button, (PB5)
LED digital display, displays menu, value and forced high/low status
Dip switch (factory default all switches are in the off position)
SW1 and SW3 are only set to ON when a sideways flue diverter is fitted,
otherwise they MUST remain set in the OFF position.
SW2 and SW4 are not used and MUST remain set in the OFF position.
PB1
PB2
PB3
PB4
PB5
SW1
SW2
SW3
SW4
EF26 error code 92
Neutraliser alert will ash when the
total caloric value reaches 255 GJ,
approximately 16 years of residential
use. Water heater can still work, but the
condensate trap should be changed.
To cancel the error code, press PB4
and PB5 together and hold for more
than ve seconds.

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 17
Menu Menu description Value
A b C d E F H J
1Gas type ULPG NG N/A N/A N/A N/A N/A N/A
2Model 2626 2426 2024 1620 N/A N/A N/A N/A
3Fixed / Max. temp 55 °C 65 °C 60 °C 50 °C 42 °C 40 °C N/A N/A
4OFF water ow rate + 3 °C + 6 °C N/A N/A N/A N/A N/A N/A
550 °C delivery
adjustment temp.
0N/A to NZ—Australian models only +1 °C +2 °C
6Remote controller
safe program
ON OFF N/A N/A N/A N/A N/A N/A
7OHS No Yes N/A N/A N/A N/A N/A N/A
8EF26 only
Condensation
prevention on
manifold
Default
9A24/A26 only
Fan revolution
180 Hz 100 Hz Setting change to reduce fan noise if customer states unit is too
noisy (Ver. 7, PCB label G)
0Post fan time 65 sec 120 sec 240 sec 480 sec To reduce the HEX temp. after combustion
If the settings are changed, please note these on this sheet for future reference. These will be needed if a PCB
replacement is required and a manual data transfer is needed.
Dark shaded sections = default setting
Parameter setting notes
• 2: Values in Menu 2 cannot be adjusted.
• 4: Menu 4 OFF water ow rate
The temperature of the outgoing hot water is monitored by a built-in sensor. If the temperature of the outgoing hot
water rises more than 3 °C (default, or 6 °C if 4b) above the selected temperature shown on the digital monitor or the
preset limit when water controllers are tted, the burner will automatically go out.
• 6: Menu 6 Remote controller safe program
Factory default is ON. If a controller has been continuously connected for more than six hours, the PCB
automatically defaults to controller only mode, making the assumption that the water heater will always be connected
to and operated by a controller. This means if a controller is disconnected, the inbuilt safe program will only allow the
unit to deliver a maximum temperature of 42 °C. If this safe program is not needed, change menu 6 from A (ON) to b
(OFF).
• 7: OHS for solar applications
N/A for New Zealand models, this is for Australian models only that have di󰀨erent temperature settings. Please
remember that the A-Series and the EF26 are not suitable and will not be warranted for solar applications.
• 8: Prevention of condensation on the manifold (EF26 only)
If exhaust gases go back into the combustion chamber, condensation on the manifold nozzle causes error 11. To
prevent this, the post-fan time (fan revolution after combustion) can be controlled as follows.
8Prevention of condensation
on the manifold
A b C d
Post fan time Outside temp. > 15 °C → 15 sec.
Outside temp. ≤ 15 °C → 120 sec.
15 sec 240 sec 480 sec
Post fan revolution X (Hz), X depends on the model,
e.g. 180 Hz
X (Hz) X(Hz) + 50
Hz
X(Hz) + 50
Hz

18 | Rinnai INFINITY EF26 and A-Series installation guide 01-20
A-Series controller communication cables
Wired water controllers operate at an extra low voltage (12 V DC) which is supplied from the water
heater, a 10 m long communication cable is supplied for connection to the water heater. Only
Rinnai supplied communication cables may be used.
The water heater end of the cables is tted with spade terminals. Only two pairs of cables (four
spade connectors in total) may be terminated. When attaching three or four cables it is necessary
to join the cable terminators as shown below.
For each pair cut o󰀨 the existing spade connectors and re-terminate each pair into a new spade
connector (A). Spade connectors are available from your local electrical component retailer
A
Single cables can be used
when terminating up to two
communication cables.
Paired cables are to be used
when terminating three or four
communication cables.
Connecting one or two communication cables
Follow steps one through ve below to terminate the cables to the water heater.
Connecting three or four communication cables
To connect three or four cables, separate all the cables to be tted into pairs.
A
A
A
When
terminating
three cables
When
terminating four
cables
Follow steps one through ve below to terminate the joined cable pairs to the water heater.
1. Isolate the power supply by switching the power point
o󰀨 and removing the power plug of the water heater
from the electric power socket.
2. Removing the retaining screw of the cable connector
at the base of the unit.
3. Swing the cable connector door open and thread the
cable through the weather seal of the cable access
hole, allowing su󰀩cient cable length so that the sheath
of the cable can be secured with the cable clamp
supplied with the transceiver.
4. Loosen the screw terminals and connect the cable
spade connectors to these terminals and re-tighten.
Polarity is not important, either wire colour can be
connected to either terminal.
5. Return the cable connector to the original position,
taking care not to damage the cable wires in the
process, and replace the retaining screw.
Retaining
screw
Cable access
Cable clamp

Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 19
EF26 controller communication cables
Wired water controllers operate at an extra low voltage (12 V DC), which is supplied from the water
heater. A 10 m long communication cable is supplied for connection to the water heater. Only
Rinnai supplied communication cables may be used.
Connecting communication cables to the mini-plug
DO NOT attempt to connect water controller cables to the mini-plug when it is plugged
into the PCB unless the power to the water heater is switched OFF, otherwise damage to
electrical components may occur.
Water controllers are connected to the PCB by a dedicated pre-wired mini-plug.
Standard electrical cable
connectors can be used
to terminate the water
controller wires to those on
the mini-plug. The existing
spade connectors, of the
communication cables, will
need to be removed prior to
termination. Controllers are
not polarity sensitive, however to avoid confusion it is recommended that like coloured wires be
terminated together.
CAUTION
Electrical connectors
(supplied with water controllers )
Communications cable
MC-100V, wireless controller
Pre-wired mini-plug
(supplied)
Communications cable
MC-91, MC-601, BC-100V
Connecting communication cables to the
PCB (refer image below)
DO NOT attempt to connect the mini-plug or
water controller cables to the water heater
unless the power to the water heater is
switched OFF, otherwise damage to electrical
components may occur.
1. Isolate the power supply by switching the
power point off and removing the water
heater plug from the power socket.
2. Remove the front cover of the appliance.
3. Insert the mini-plug and the connected
water controller cables through the cable
access at the base of the appliance. Ensure
the cable connectors are located inside the
appliance for protection.
4. Locate the PCB (bottom right of the
appliance), and carefully move the plastic
safety cover out of the way.
5. Locate the accessory port socket (bottom
front of PCB).
6. Plug the mini-plug into the accessory port
socket, the plug and socket are keyed so
that they can only be plugged into the one
direction).
7. Proceed with the water controller
installation and connect the communication
cables to the controllers.
Cable access
PCB
PCB
Safety
cover Accessory port socket
Accessory
port socket
connection

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Rinnai.co.nz Installation guide