Rinnai Water Heater 24e User Guide

Installation and User Manual  
Infinity 24e  
Continuous Flow Water Heater  
Important.  
Read these instructions carefully before attempting installation or use of  
this appliance. All work must be carried out by competent persons.  
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CONTENTS  
Rinnai UK Warranty..…………………….. …………………………………………………2  
Unpacking Rinnai Water Heater………… …………………………………….…………..4  
Installation Instructions…………………… …………………………………………………5  
Flue Requirements………………………... …………………………………………………8  
Dimensions………………………………… …………………………………………………9  
Technical Details..………………………… ……………………………………………….10  
Features and Benefits……………………. ……………………………………………….11  
Important Information…………………….. ……………………………………………….12  
Operation without Remotes……………… ……………………………………………….14  
Temperature Controls…………………….. ……………………………………………….15  
Testing……………………………………… ……………………………………………….25  
Gas Pressure Setting…………………….. ……………………………………………….26  
Dip Switch Setting………………………… ……………………………………………….28  
Error Messages…………………………… ……………………………………………….30  
Restarting the Rinnai Water Heater…….. ……………………………………………….32  
Wiring Diagram……………………………. ……………………………………………….33  
Diagnostic Points………………………….. ……………………………………………….34  
Specification……………………………….. ……………………………………………….35  
Service Contact…………………………… ………………………………………………36  
Commissioning Check List……………….. ………………………………………………36  
3
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UNPACKING RINNAI WATER HEATER  
After unpacking the appliance check for damage, if the heater is damaged contact  
your supplier immediately. Do not install a damaged appliance before checking  
with your supplier.  
One remote control and heater accessories pack are inside the carton.  
Check that the appliance supplied is the correct gas type for the installation. Refer  
to the data plate located on the left-hand side of the appliance.  
Remove the heater and the accessories from the carton, and check that all the  
parts are included . The remote control cable is provided with spade connectors.  
Remote Control Parts  
Quantity  
Diagram  
Description  
Temperature con-  
troller MC-91-1A  
1
Cable clamp  
Cable Clamp  
1
1
5
1
1
Spade connectors  
Control cable 20  
metres  
Clamp screw  
Unit Mounting Fasteners  
Quantity  
Diagram  
Description  
Screw  
5
5
Screw  
4
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INSTALLATION INSTRUCTIONS  
IMPORTANT INFORMATION  
1. Gas safety (Installation & Use) regulations 1998 are the ‘Rules in force’. In your  
own interest and that of safety, it is law that all gas appliances are installed by  
competent persons in accordance with the above regulations. Failure to install  
appliances correctly could lead to prosecution. Other persons should NOT attempt to  
install this equipment.  
2. Unpack the appliance and check it carefully. If it appears to have any defects or  
damage DO NOT INSTALL, contact your supplier.  
3. This appliance is for normal hot water supply only and should not be used as pool or  
spa water heater.  
4. The heater must be installed in the vertical position with the gas and water  
connections on the underside pointing vertically downward.  
5. Installation must be carried out in accordance with the current issue of the following:  
Building regulations issued by the Department of the Environment and  
Building Standards (Scotland) Regulations.  
I.E.E. Wiring regulations for electrical installations.  
Gas safety (Installation and Use) Regulations current issue.  
BS 5546  
BS 5440  
BS 6891  
BS 5482  
BS 6700  
Local byelaws  
Water regulations  
Health and safety at work etc. Act 1974  
Such other specifications and regulations that may supersede or complement the  
above documents.  
Please be sure that you are fully aware of your obligations and responsibilities  
under these regulations.  
5
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INSTALLATION INSTRUCTIONS - POSITIONING  
General Installation Information.  
External Installations.  
The Rinnai Infinity 24e is for external mounting only.  
The unit is classed as a Category A3 flueless appliance as described by CEN CR1749.  
Although BS 5440 does not relate directly to heaters in this category the rules must be  
followed when positioning the appliance, especially with regard to other appliances,  
openings, and boundaries. Figure C.1 from BS5440-1:2000 is provided for your  
guidance.  
The appliance must be mounted on a vertical wall or structure with the water and the gas  
connections on the underside pointing towards the ground.  
THIS APPLIANCE MUST NOT BE USED AS A DOMESTIC SPA OR SWIMMING  
POOL HEATER.  
Appliance Location.  
The appliance should be placed as close as practicable to the most frequently used hot  
water outlet point or points to minimise the delay time for hot water delivery. For  
installations where the distance between the unit and hot water outlet points is  
considerable, the appliance can also be fitted in a 'flow and return system' which  
minimises the waiting time for hot water delivery. Alternatively, multiple appliances can  
be strategically placed to service outlet points with minimal delay time. Contact Rinnai  
for further information.  
Location of the appliance flue terminal must be in accordance with the clearances shown  
on page 8. Ensure that the flue terminal and hot water outlet connection cannot be  
touched by children. The appliance must be clear of obstructions and shrubbery.  
The wall or structure on which it is mounted must be capable of supporting the weight of  
the appliance (18 kg) and associated pipework. Ensure that suitable screws or bolts are  
used to secure the water heater to the wall. Bracket and fixing hole locations are shown  
on page 9. The top bracket has a keyhole slot so that the appliance can be hung on one  
screw, and then the other fixings can be added to secure the unit.  
The appliance must be in an accessible location. Sufficient clearances shall allow  
access to, and removal of, all serviceable components. The appliance should not be  
mounted higher than 3.5 metres from the ground or floor level unless the customer can  
arrange permanent and safe access or can arrange another means of access, for  
example, by means of scissor or boom lifts.  
Multiple heater installations can be installed with the heaters manifolded together.  
The heater draws combustion air through the casing for the external model.  
Heater guards and pipe cover boxes for security and safety are available from Rinnai.  
6
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INSTALLATION INSTRUCTIONS - CONNECTIONS  
Water Supply.  
Where the water supply pressure exceeds 12 bar, an approved pressure reducing  
device is required at the inlet of the appliance. To achieve the rated flow a minimum  
water supply pressure of 1.4 bar is required at the appliance inlet. The unit will operate  
at lower supply pressures but the rated flow will not be achieved. Contact Rinnai for  
'gravity fed' or 'low pressure' hot water installations.  
Water pipe sizing and layout should be designed correctly to ensure the given water  
flows from the Rinnai Infinity are available. All hot water pipework should be insulated to  
optimise maximum performance and energy efficiency.  
Water Connection.  
Connect the hot and cold water supply pipes. An approved isolation valve and strainer  
MUST be installed in the cold water inlet pipe. An approved isolation valve should be  
installed in the hot water outlet pipe. There must be a union or release fitting on the  
heater side of the isolation valves. A non return valve is not required unless dictated by  
local regulations. A pressure relief valve should be installed in the pipework to  
discharge safely into a suitable drain when the system has a flow and return, or tank.  
Positions of the cold water inlet, hot water outlet and gas connections are shown on  
page 9. All connections are ¾ inch BSP. This is NOT an indication of the pipe sizes  
required.  
If the heater is in a hard water area a suitable water conditioning device should be in-  
stalled to prevent the build up of limescale within the heat exchanger. Heat exchangers  
damaged by scaling are not covered by the manufacturers guarantee. Guidelines are  
given below. If the local water exceeds these values the heater must be protected.  
Total Dissolved  
Solids (TDS)  
Description  
pH  
Total Hardness  
200 mg/litre  
Chlorides  
Magnesium  
10 mg/litre  
Calcium  
Sodium  
Iron  
Maximum Recommended  
Levels  
6.5 - 9.0  
600 mg/litre  
300 mg/litre  
20 mg/litre  
150 mg/litre  
1 mg/litre  
Gas Connection  
Check pipe sizing required for the heater input. The heat input for the Infinity 24e is 52  
kW. Refer to BS6891 (Natural Gas) and BS5482 (Propane) for guidance on correct pipe  
sizing calculation.  
Check that the size of the gas meter and pipework will be sufficient for all appliances on  
the main. Sufficient gas must be available at the appliance if correct operation is to be  
expected. An approved gas isolation valve must be fitted at the gas inlet. A union or  
release fitting should be installed after the isolation valve.  
Electrical Connection.  
The appliance must be earthed. The appliance is suitable for 230VAC – 50hz mains  
only and all wiring must be carried out to the I.E.E regulations latest edition. The heater  
electrical supply must be provided with a fused (3A) local isolator with a contact  
separation of 3mm minimum on all poles for servicing. Observe polarity and ensure that  
wiring is correctly restrained.  
7
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FLUE REQUIREMENTS - POSITIONING  
Dimension Terminal Position  
Distance  
A
B
Directly below an opening, air brick, opening windows, etc.  
Above an opening, air brick , opening window, etc.  
300mm  
300mm  
C
D
E
F
G
H
I
Horizontally to an opening, air brick , opening window, etc.  
Below gutters, soil pipes or drain pipes.  
Below eaves.  
300mm  
75mm  
200mm  
200mm  
150mm  
200mm  
300mm  
600mm  
1200mm  
Below balconies or car port roof.  
From a vertical drain pipe or soil pipe.  
From an internal or external corner.  
Above ground, roof or balcony level.  
From a surface facing the terminal.  
From a terminal facing a terminal  
J
K
From an opening in a car port. ( e.g. door, window) into a dwell-  
ing  
L
1200mm  
M
N
O
P
Vertically from a terminal on the same wall.  
Horizontally from a terminal on the same wall.  
From the wall on which the terminal is mounted  
From a vertical structure on the roof.  
1500mm  
300mm  
N/A  
N/A  
Q
Above an intersection with roof.  
N/A  
8
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DIMENSIONS  
9
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TECHNICAL DETAILS  
Infinity Model  
Units  
Infinity 24e  
Installation  
External  
0.8  
Nat Gas Press Low  
Nat Gas Press High  
LPG Press Low  
LPG Press High  
Height  
mbar  
mbar  
mbar  
mbar  
mm  
9.0  
1.7  
22.6  
600  
350  
170  
18  
Width  
mm  
Depth  
mm  
Weight  
kg  
Flue System  
Temp. Range Controllers  
Forced Exhaust  
37 - 75  
deg C  
Temp. Range without  
Controllers  
37,40,43,50,  
55*,65,75  
deg C  
Direct Electronic  
Ignition  
Ignition  
Gas Consumption Low  
Nat Gas  
5.8  
5.8  
kW  
LPG  
kW  
Gas consumption High  
Nat Gas  
52  
52  
kW  
LPG  
kW  
Max Flow raised 33C  
Min Operation Flow  
Water Pressure Nom.  
Power Supply  
18  
L/min  
L/min  
bar  
2.7**  
1.4 - 10  
230 V / 50 Hz  
Elec. Consumption Standby  
(with 1 remote connected)  
6
Watts  
Elec. Consumption Run  
55  
Watts  
Watts  
Elec. Consumption  
Anti-frost Heaters On  
100  
* Factory Setting  
**Minimum operation flow based on temperature setpoint and inlet conditions.  
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FEATURES AND BENEFITS  
Congratulations on purchasing the Technologically Advanced, Temperature Controlled,  
Rinnai Hot Water System.  
The Rinnai Infinity 24e NEVER RUNS OUT of hot water. As long as electricity,  
water, and gas supplies are connected, hot water is available when hot water taps are  
open.  
Built into the main micro-processor is the facility to LIMIT THE MAXIMUM  
TEMPERATURE of the hot water supplied. The water temperature may be limited to  
various maximum temperatures. This is particularly useful when the hot water unit is  
installed where young children or the infirm may be using the hot water. The Infinity  
24e is delivered with a preset temperature of 550C. If required, the temperature limits  
can be changed by an authorised person. For further information, please contact  
Rinnai.  
The Rinnai Infinity external unit is a powered flue appliance. This makes it  
COMPACT, saving both floor and wall space.  
The temperature of outgoing hot water is CONSTANTLY MONITORED by a BUILT-  
IN SENSOR. If the temperature of the outgoing hot water rises to more than 3°C  
above the selected temperature the burner is shut OFF and only turned ON again  
when the temperature falls to below the selected temperature.  
The burner lights automatically when the hot water tap is opened, and distinguishes  
when the tap is closed. IGNITION IS ELECTRONIC, so there is no pilot light. When  
the hot water tap is off, no gas is used.  
Up to three temperature controllers can be mounted remotely from the heater. This  
offers the following additional features:  
Localised temperature setting.  
Diagnostic message.  
‘Deluxe’ Temperature Controllers are an optional extra. These provide functions  
including Bath Fill, Voice Prompt, and Clock Setting.  
Temperatures selected at the controllers are retained in the SYSTEM MEMORY.  
Operating NOISE LEVEL IS VERY LOW.  
ERROR MESSAGES ARE DISPLAYED on the Temperature Controllers, assisting  
with service.  
FROST PROTECTION device built in as standard.  
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IMPORTANT INFORMATION  
Excessively hot water is dangerous, especially for young children and the infirm. The  
water heater allows you to control the temperature of your hot water to safe levels.  
Water temperature over 50ºC can cause severe  
burns instantly or even death from scalding.  
Children, disabled and the elderly are at the  
highest risk of being scalded by excessively hot  
water.  
Always test the temperature of the water before  
bathing or showering.  
Burns from hot water taps can result in very  
severe injuries to young children.  
Hot water at 65°C can severely burn a child in less  
than half a second. At 50°C it takes five minutes.  
Burns can occur when children are exposed  
directly to hot water or when they are placed into a  
bath which is too hot.  
Do stay with children  
whenever they are in the bathroom.  
Consider child—resistant taps  
Do take them out of the bathroom if  
you need to answer the phone or  
door.  
or inexpensive tap covers,  
both of which prevent a child’s  
hand from turning on the tap.  
Do test the temperature of the water  
with your elbow before placing your  
child in the bath.  
Consider reducing the  
temperature of the water  
supplied to the hot tap to  
500C.  
Do make sure that the tap is turned  
off tightly.  
DO  
This approach can be extremely  
valuable because it requires a  
one time action for a long term  
reduction in risks of scalds.  
This type of automatic protection  
is important during times when a  
parent or carer has been  
distracted.  
Do consider setting your Rinnai  
Infinity 16e at a maximum  
temperature of 500C.  
Do install a child proof tap cover  
OR,  
Do install a child resistant tap.  
Do not leave a toddler in the care of  
another small child. The older child  
may not have safely set the temperature.  
DO  
NOT  
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IMPORTANT INFORMATION  
Always check water temperature before  
Hot water may go out without warning at  
use.  
low water flows.  
OFF  
Refer to warning about hot water on  
page 12 for important safety information.  
The Infinity 24e controls the water  
temperature automatically. For high  
temperatures it may reduce the flow. The  
water from the hot tap may be reduced  
after the temperature shown on the  
remote control is raised. The water flow  
may also vary with the temperature of the  
incoming water supply.  
If freezing temperatures  
are expected, turn off the  
water and gas, and  
drain the water  
heater.  
1. Water Off  
2. Gas Off  
3. Drain Water  
If the power is left on the  
Automatic Frost Protection  
will prevent the unit from  
Freezing. Frost protection  
is standard on the external  
units.  
Keep flammable materials, trees, shrubs,  
chemicals etc. away from the heater.  
Do not touch the unit cover or the flue  
outlet. Do not insert objects into the flue  
outlet.  
On cold days steam may be discharged  
from the flue outlet. This is normal, do  
not be alarmed. It does not indicate a  
fault.  
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OPERATION WITHOUT REMOTES  
Rinnai Infinity products have no pilot light and when installed without Temperature  
Controllers, the appliance will operate automatically as soon as a hot water tap is  
opened.  
The burner ignites with electronic ignition and the flame extinguishes as soon as water  
flowing through the appliance stops.  
Turn On by opening the hot water tap  
Rinnai Infinity water heaters without controllers are factory pre-set to a temperature limit  
of 55°C. Other limits, lower or higher, are available on request for the Infinity range.  
Temperature controllers are available that allow precise digital temperature control.  
Higher temperatures may be necessary for circulation loop systems.  
Controllers can be easily added at any time after installation.OTE  
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TEMPERATURE CONTROLS - GENERAL  
When deciding on the best position for the temperature controls, the following points  
should be taken into account.  
Fit the controls out of reach of children (suggested height from the floor 1.5m.)  
Avoid positions where the controllers will become hot. Do not fit them near stoves or  
ovens, or above radiators or heaters.  
If possible, avoid exposure to direct sunlight or positions where bright lights will make  
the digital display difficult to read.  
Position away from areas where the controller will be prone to splashing by cooking  
products such as oils and fats.  
The temperature controllers are water resistant, however they should be positioned  
away from areas where direct or persistent splashing could occur.  
Refer to the I.E.E electrical wiring regulations current edition for location requirements  
in shower and bath areas.  
The cables to the temperature controller carry only 12VDC (extra low voltage.)  
When using more than one temperature controller the signal cable should be run in  
parallel. That is, from controller to controller to heater, or from each controller to the  
heater. Do not wire the controllers in series.  
The installation in every application will vary, therefore the temperature controller cable  
has been provided so that you may cut the length accordingly and fit the spade  
connectors, ensuring a good connection.  
Cables are simply ‘piggy-backed’ at the water heater or at the primary temperature  
controller. Polarity is not important when connecting the cables, either colour wire can  
be connected to either terminal at both the heater or primary temperature controller. If  
more cable is needed any cable with similar specification to the cable supplied with the  
controller can be used. Maximum length is 50 metres.  
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TEMPERATURE CONTROLS - INSTALLATION  
Universal Temperature Controller  
MC-91-1A  
1. Determine the most suitable position for the  
temperature controller.  
2. Drill 3 holes in the wall as shown in fig. 1, one  
for the cable and two for the securing screws.  
Ensure holes are drilled deep enough. Fit wall  
plugs if needed. (ensure controller is level.)  
3. Run the cable provided through the hole in the  
wall ensuring that the end fitted with the  
connector is nearest the controller. (fig. 2.)  
4. Remove the face plate from the controller using  
a flat screwdriver. Take care not to damage the  
cover (fig. 3.)  
5. Connect the cable to the temperature controller.  
6. Fix the controller to the wall and fasten with the  
phillips head screws supplied as shown in (fig.  
4.)  
7. Remove the protective plastic film from the  
controller face as shown in fig. 4.  
8. Replace the face plate.  
NOTE  
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TEMPERATURE CONTROLS - INSTALLATION  
Connecting One or Two Controllers  
1. Isolate the power supply.  
2. Remove the front cover from the Appliance (4  
screws) fig. 1.  
3. Thread the cable through the cable access hole  
at the base of the appliance.  
4. Connect the spade connectors to the terminals  
marked "Remote Control" on the printed circuit  
board (fig.2). Polarity is not important. Either  
wire colour can be connected to either terminal.  
5. Replace cover of the Appliance. Ensure that the  
special earth screw is placed at the bottom right  
hand corner for earthing purposes.  
Connecting Three Controllers  
1. Isolate the power supply.  
2. Remove the front cover from the Appliance (4  
screws) fig.1.  
3. Thread the cables through the cable access  
hole at the base of the appliance.  
4. Cut the spade connectors from two controller  
cables (4 connectors should be cut off) and  
discard. Connect the wires and terminate into  
two new spade connectors as shown in fig. 3.  
5. Thread the 3 cables through the cable access  
hole at the base of the appliance. Connect the  
4 spade connectors to the terminals marked  
“Remote Control" on the printed circuit board  
(fig.2). Polarity is not important. Either wire  
colour can be connected to either terminal.  
6. Replace cover of the Appliance. Ensure that the  
special earth screw is placed at the bottom right  
hand corner for earthing purposes.  
Connecting Four Controllers  
1. Isolate the power supply.  
2. Remove the front cover from the Appliance (4  
screws) fig.1.  
3. Cut the spade connectors from all four controller  
cables to be connected to the appliance (8  
connectors should be cut off) and discard.  
Connect the wires from two remotes and  
terminate into two new spade connectors as  
shown in fig. 3.  
4. Repeat for remaining two remotes.  
5. Thread the 4 cables through the cable access  
hole at the base of the appliance. Connect the 4  
spade connectors to the terminals marked  
“Remote Control" on the printed circuit board  
(fig.2). Polarity is not important. Either wire  
colour can be connected to either terminal.  
5. Replace cover of the Appliance. Ensure that the  
special earth screw is placed at the bottom right  
hand corner for earthing purposes.  
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TEMPERATURE CONTROLS  
The purpose of a Temperature Controller is to enable the user to have complete control  
over the hot water supply. Used correctly, the hot water unit will supply hot water at the  
temperature selected, even when the water flow is varied, or when more than one tap is  
used. Adjustments to the operation of your hot water unit can be made with any of the  
Temperature Controllers. Each Temperature Controller can be individually programmed.  
Up to four Universal and Deluxe Temperature Controllers can be fitted with the Infinity  
24e. Universal Controllers allow temperature selection only and come as standard with  
the water heaters. Deluxe Temperature Controllers are an optional extra. These  
controllers have temperature selection, bath fill, voice recognition, and time clock  
functions. When more than one Universal Controller is used one may be set as the  
Master Controller to allow higher temperatures.  
Various water temperatures (°C) can be selected as follows:  
Universal Controller:  
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 500C  
Master Universal Controller:  
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50, 55, 60, 65°C  
Deluxe Bathroom Controller:  
Hot Water Delivery: 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50°C  
Bath fill Delivery: 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48°C  
Deluxe Kitchen Controller:  
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48, 50, 55, 60, 65°C  
If a temperature 43°C or higher is selected on any controller and this temperature is then  
decreased to below 43°C and increased again whilst the water is running, the maximum  
selectable temperature will become 43°C. This provides additional safety for the  
consumer.  
Suggested temperatures are:  
Kitchen 50°C - 65°C*; Shower 39°C - 43°C; Bath fill 39°C - 45°C  
* This temperature may not be available on all installations.  
These temperatures are suggested starting points for selection. You may find higher or  
lower temperatures are more comfortable. Maintaining lower temperatures helps to save  
energy. To obtain water temperatures lower than 37°C simply add cold water.  
Up to four controllers can be used for one Infinity 24e. When multiple temperature  
controllers are used they allow the temperature to be set from various locations by  
pushing the transfer button which gives that controller priority over the system. The  
temperature selected by the controller with priority will be available to all outlets.  
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TEMPERATURE CONTROLS - OPERATING  
Remote temperature controllers are a feature that provides control over the water  
temperature. Rinnai Infinity water heaters can be operated with 1, 2, 3, 4 or no  
temperature controllers. The Universal controller MC-91-1A comes as standard with all  
Infinity water heaters.  
NOTE:  
Each time a button is pressed, a BEEP will sound.  
The BEEP sound can be muted by depressing the Temperature Controller Up and Down  
buttons simultaneously for more than 3 seconds.  
This can be done for each Temperature Controller.  
To return to original settings, repeat this step.  
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TEMPERATURE CONTROLS - OPERATING  
Using 1 Universal Temperature Controller.  
Press the On/Off button on the temperature controller.  
The ON indicator will glow on the Temperature Controller.  
This indicates that the heater is ready to supply hot water  
when a tap is opened.  
Adjusting Temperature  
Simply press the Hot Water Temperature Up or Down arrow  
button until the desired temperature is displayed on the  
digital display.  
To operate the heater, simply turn any hot water tap on. This  
will automatically light the burner providing hot water. The  
red In Use indicator will glow on the temperature controller.  
Caution: Always check water temperature before use.  
With the hot water tap open and a temperature of 430C or higher selected,  
if the temperature is decreased below 430C, and then raised again the  
maximum available temperature will be 430C. For safety reasons  
temperature ‘priority’ cannot be transferred between controllers when a  
hot water tap is open.  
Note:  
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TEMPERATURE CONTROLS - OPERATING  
Using 2 or more Universal Temperature Controllers.  
Switching the system ON.  
The hot water system and all controllers can be  
switched ON and OFF from any controller by pressing  
the On/Off button as shown. When the system is  
turned ON the water temperature display will be lit.  
During normal operation the system is left ON. Do  
not push the On/Off button when water is running.  
Using hot water.  
Ensure the system is switched On by verifying the  
temperature display is lit. Ensure the controller has  
priority by verifying the Transfer LED indicator is lit. If  
it is not then press the Transfer button once. This  
gives the local controller priority of temperature over  
the system.  
Select the desired temperature using the Hot water  
temp. buttons. The selected temperature will be  
displayed on all controller displays. This is the water  
temperature which will be supplied from the heater.  
Bathroom temperatures should be no more than 500C.  
Open the hot water tap. The appliance  
will be activated and the In Use  
indicator will be lit.  
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TEMPERATURE CONTROLS - OPERATING  
Using 4 Universal Temperature Controllers.  
You will need to activate the fourth controller.  
STEP 1:  
STEP 2:  
On the Master controller press and hold the Transfer and On/Off buttons  
simultaneously (see fig 2.) until a “beep” is heard (approx. 5 seconds)  
Check that the display on all Four controllers is lit  
and displaying a temperature when switched on. If  
any ONE of the controllers displays two dashes (see  
fig 1.) in the display repeat STEP 1.  
Note:  
If the master controller is replaced, repeat STEP 1 above for the new controller.  
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TEMPERATURE CONTROLS - OPERATING  
Using High Temperature Display Controllers.  
You will need to program the Master controller if you want to display and use  
temperatures over 500C. Programming only needs to be done on Master universal  
controllers; other universal controllers will not allow this, and Deluxe Kitchen Controllers  
are supplied already programmed to allow high temperatures. Temperatures in  
bathrooms should never exceed 500C.  
STEP 1: On the Master controller only press and hold the Transfer and On/Off  
buttons simultaneously (see fig 2.) until a “beep” is heard (approx. 5 seconds)  
STEP 2: When the Primary controller is switched on it should be possible to select  
temperatures higher than 50ºC. If not repeat STEP 1.  
Note:  
If the master controller is replaced, repeat STEP 1 above for the new controller.  
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TEMPERATURE CONTROLS - OPERATING  
To turn off your hot water system.  
During normal operation the system is left on.  
To turn the system off simply press the On/Off  
button on any temperature controller (where  
fitted). This will shut the water heater down  
completely including the temperature controller  
digital display.  
The on indicator will go out.  
If hot water taps are opened when the Rinnai  
Infinity is off, cold water will flow from the taps.  
If the system is to be left off over the winter be  
sure to drain it down if there is a possibility of  
freezing temperatures.  
Additional safety features.  
Whilst the hot water tap is open, the following  
safety features apply:  
Temperature selection cannot be transferred.  
If a temperature of 430C or higher selected,  
and the temperature is decreased to below  
430C, and then raised again the maximum  
available temperature will be 430C.  
Other controllers are unable to change the  
delivery temperature of the water.  
Note  
The temperature of the outgoing water is constantly monitored by a built in  
sensor. If the temperature of the outgoing hot water rises to more than 3ºC  
above the selected temperature shown on the digital display, or the preset  
limit if controllers are not fitted, the burner will automatically go out. The red  
operation indicator will also go out. The burner will ignite again once the  
outgoing hot water temperature falls to that shown on the digital display (or  
the pre-set limit of the Rinnai Infinity heater).  
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TEMPERATURE CONTROLS - INFORMATION  
Do not push the On/Off button on the  
Master controller after transferring priority  
of temperature selection to a Secondary  
controller as the system will shut down.  
Temperature priority can not be switched  
to another controller when the water is  
flowing through the water heater.  
500C  
Do Not Turn OFF  
the Master  
Controller  
Controller 1  
in use  
Controller 2  
cannot take  
priority  
If a temperature higher than 50ºC has  
been selected on the Master controller  
and priority of temperature selection is  
transferred to another controller (or it is  
turned off), then back again (or turned on  
again), the temperature on the Master  
controller will automatically drop to 50ºC.  
If the set point is less than 500C it will not  
alter. This is a safety feature.  
Do not clean the remote control with  
solvents or detergents. Use only a soft  
damp cloth.  
Master  
Another  
Master  
Controller  
Controller  
Controller  
Depending on the weather conditions  
and the length of the pipe between the  
heater and the tap in use, there may be a  
variation between the temperature dis-  
played at the controller and the tempera-  
ture at the tap.  
If a temperature higher than 420C has  
been selected on the Universal control-  
ler and priority of temperature selection is  
transferred to another controller (or con-  
troller is turned OFF), then back again (or  
turned ON again), the temperature will  
automatically drop to 420C. If the set  
point is less than 420C it will not alter.  
This is a safety feature.  
480C  
Universal  
Another  
Universal  
Controller Controller Controller  
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TESTING  
1. Purge gas, hot water and cold water supply lines before making the final connection  
of the water heater. Swarf in either the gas or water supplies may cause damage.  
2. Turn on gas and cold water supplies.  
3. Test for water leaks and gas escapes near the unit.  
4. Isolate gas and electric supply. Remove test point screw located on the inlet gas  
valve connection inside the heater and attach pressure gauge.  
5. Turn the power on at the switch and turn on gas. Warning: There are 230V AC live  
supplies inside the heater.  
6. If remote controllers are fitted, turn the controller on, select the maximum delivery  
temperature and open ALL available hot water outlets. If remote controllers are not  
fitted, simply open all available hot water outlets. (CAUTION: Ensure building  
occupants do not have access to hot water outlets during this procedure).  
7. The gas pressure check must be carried out with all other appliances on the same  
main operating at maximum capacity to ensure that there is sufficient gas pressure.  
8. With all other appliances operating the pressure at the test point on the inlet to the  
gas valve should read 20 mbar for Natural Gas. For LPG (Propane) the pressure  
should be 37 mbar. If the pressure is lower, the gas supply is inadequate and the  
water heater will not operate to specification. Check gas meter, regulator and  
pipework for correct operation/sizing and rectify as required. Note that the gas  
regulator on the appliance is electronically controlled and factory pre-set. Under  
normal circumstances it does not need adjustment during installation.  
9. Close hot water outlets.  
10.Inspect and clean the strainer and the filter located on the cold water inlet pipe. This  
procedure may need to be repeated to ensure the strainer remains clear.  
11.If temperature controllers are fitted, it is necessary to test their operation through the  
complete range of functions.  
12.Confirm the hot water delivery temperature using a thermometer. If controllers are  
fitted, compare the measured value to the set point.  
13.After testing is completed, explain to the user the functions and operation of the  
water heater and temperature controllers.  
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GAS PRESSURE SETTING  
The working gas pressure on the water heater is electronically controlled and factory set.  
Under normal circumstances it does not require adjustment during installation. Perform  
this procedure only if the unit is not operating correctly and all other possible causes for  
incorrect operation have been eliminated. Contact Rinnai UK before  
attempting to alter the gas pressure. Failure to do so could void  
the warranty.  
1. Turn 'OFF' the gas supply.  
2. Turn 'OFF' 230V power supply.  
3. Remove the front cover from the appliance.  
4. Check gas type switch no.1 of SW1 (fig. 1) is  
in the correct position for the type of gas (Nat.  
or LPG) you are using. (SW1 is top set of  
switches.)  
5. Attach pressure gauge to burner test point. (fig. 2)  
(fig 1)  
off  
on  
off  
on  
SW1  
SW1  
1
2
3
4
5
6
7
8
-Nat. Gas  
1
2
3
4
5
6
7
8
-LPG  
6. Turn 'ON' the gas supply.  
7. Turn 'ON' 230V power supply.  
Forced Low  
off on SW2  
1
2
3
8. If remote controllers are fitted, turn the unit  
'ON' at the master controller, select the  
maximum delivery temperature and open a  
hot water tap fully. (CAUTION: Ensure  
building occupants do not have access  
to hot water outlets during this  
procedure.)  
(fig 3)  
9. Set the appliance to 'Forced Low'  
combustion by setting No. 2 dipswitch of the  
bottom set of dip switches (SW2) to 'ON'. (fig  
3)  
LEGEND:  
Black Section indicates  
position of dip switch.  
10.Check the burner test point operating  
pressure.  
OFF ON  
OFF  
OFF ON  
ON  
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GAS PRESSURE SETTING  
11.Remove rubber access plug and adjust the  
regulator screw on the modulating valve (fig. 4  
and 4a) as required to the pressure below.  
N.G  
0.8 mbar  
Propane 1.7 mbar  
12.Lock the regulating screw on the modulating  
valve.  
13.Set the appliance to 'Forced High' combustion  
by setting both no. 2 and no. 3 dipswitches of  
the bottom set of switches (SW2) to 'ON'.  
(fig.5) Ensure maximum water flow.  
(fig 4a)  
14.Check the burner test point pressure.  
Forced High  
off on SW2  
15.Adjust the high pressure potentiometer on the  
Printed Circuit Board below SW2 (fig. 6) to the  
pressure shown below. The potentiometer is  
very sensitive, turn no more than a few de-  
grees at a time; then let the pressure settle  
down before turning it more.  
1
2
3
(fig 5)  
N.G  
9.0 mbar  
Propane  
22.6 mbar  
16.IMPORTANT: Set dip switch no. 2 and no. 3  
on the bottom set of switches (SW2) to 'OFF'  
to return the appliance to 'Normal' combustion.  
(fig. 7)  
17.Close hot water tap.  
(fig 6)  
18.Turn OFF the gas supply and 230V power  
supply.  
Normal  
19.Remove pressure gauge, and replace sealing  
screw.  
off on SW2  
1
2
3
20.Turn 'ON' the gas supply and 230V power  
supply.  
(fig 7)  
21.Operate unit and check for gas leaks at test  
point.  
22.Replace the front cover of the appliance.  
CAUTION  
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DIP SWITCH SETTING  
Dip Switch Positions Explained  
OFF ON SW1  
1
2
3
4
5
6
7
8
-
-
-
-
-
-
Gas Type  
LEGEND:  
Black Section indicates  
position of dip switch.  
Computer Programming  
Computer Programming  
Temperature  
Temperature  
Temperature  
OFF ON  
OFF  
OFF ON  
ON  
Temperature  
Temperature  
OFF ON SW2  
1
2
3
-
-
-
Computer Programming  
Combustion  
Combustion  
Dip Switches Explained  
GAS TYPE  
LPG  
NAT GAS  
OFF ON SW1  
OFF ON SW1  
1
2
3
4
5
6
7
8
off  
1
2
3
4
5
6
7
8
on  
COMBUSTION  
NORMAL  
FORCED LOW  
FORCED HIGH  
OFF ON SW2  
OFF ON SW2  
1
OFF ON SW2  
1
1
2
3
off  
off  
2 on  
3 off  
2 on  
3 on  
COMPUTER PROGRAMMING  
OFF ON SW2  
1
2
3
-
Switch is always in the OFF position for the  
Infinity 24e  
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DIP SWITCH SETTING  
Temperatures - Remotes Connected  
off on SWI  
off on SWI  
off on SWI  
off on SWI  
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
40 deg C  
43 deg C  
50 deg C  
55 deg C  
off on SWI  
off on SWI  
off on SWI  
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
60 deg C  
65 deg C  
75 deg C  
Temperatures - Remotes Not Connected  
off on SWI  
off on SWI  
off on SWI  
off on SWI  
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
40 deg C  
43 deg C  
50 deg C  
55 deg C  
off on SWI  
off on SWI  
off on SWI  
off on SWI  
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
4
5
6
7
8
60 deg C  
65 deg C  
75 deg C  
85 deg C  
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ERROR MESSAGES  
Rinnai water heaters have the ability to check their own operation continuously. If a fault  
occurs, an error code will flash on the Digital Display if you have temperature controllers  
installed. This assists with diagnosing the fault, and may enable you to overcome a  
problem without a service call. Please quote the code displayed when enquiring about  
service. Error codes flash.  
Code  
Fault  
Remedy  
Displayed  
-
Noticeable reduction in water  
flow  
Inlet water filter needs to be cleaned.  
Not enough combustion air  
Check for physical blockages around  
air intake or exhaust. Check  
combustion fan.  
10  
No Ignition / Gas supply  
Check gas valves, gas supply and  
sparker unit.  
11  
12  
Flame failure / Low Gas flow  
Check gas valves and gas supply.  
Check flame rod.  
Check exhaust is clear.  
Check remote control.  
Remaining flame safety device  
Over temperature warning  
Service Call  
Service Call  
Service Call  
14  
16  
32  
Outgoing water temperature  
sensor faulty  
Heat Exchanger Thermistor  
Error  
Service Call  
33  
Gas modulating valve faulty  
Combustion fan failure  
Water Flow Control Device  
Micro-processor failure  
Flame rod circuit error  
Service Call  
Service Call  
Service Call  
Service Call  
Service Call  
52  
61  
65  
71  
72  
Fan Failure  
Service Call  
90  
* In all cases, you may be able to clear the Error code by turning the hot water tap OFF,  
then ON again. If this does not clear the error, try pushing the On/Off button OFF then  
ON again. If the Error Code still remains contact Rinnai or your nearest service agent for  
advice.  
** Faults caused by insufficient gas/water supply or gas/water quality and installation  
errors are not covered by the manufacturer’s guarantee.  
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ERROR MESSAGES  
Troubleshooting without controllers  
If you have not installed temperature controllers and experience the following  
symptoms, please carry out the suggestions below. If symptoms continue, please  
contact Rinnai for advice.  
Fault  
Remedy  
Heater does not attempt Check the power is on at the heater.  
to start at all.  
Check the cold water valve supplying the heater is open.  
Heater starts then shuts Check the power is on.  
down immediately.  
Check the gas valve at the heater and at the gas meter is fully open.  
Open the hot water tap fully.  
Heater starts then the  
water goes cold.  
Check the power is on.  
Open your hot water tap further or try another hot outlet.  
NOTE: Faults caused by insufficient gas/water supply or gas/water quality and  
installation errors are not covered by the manufacturer’s guarantee.  
Installations with circulation pumps  
With temperature controller fitted.  
If you have an installation using a secondary circulation pump this must be  
switched off so that there is no flow through the heater when starting or after a  
power failure. If the pump is running the unit will not operate (no display on the  
controller). Isolate pump then start heater before restarting pump. This is a safety  
feature.  
The pump should also be fitted with a thermostat to prevent the return temperature  
reaching the heater set point temperature.  
Without temperature controller fitted.  
The heater should automatically reset and provide water at the temperature set by  
the internal limit switches.  
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RESTARTING THE RINNAI WATER HEATER  
Following a power cut the heaters should be restarted in this manner.  
Standard system.  
Single or multiple water heaters without remote controllers.  
The heaters will automatically reset without any user involvement.  
Single or multiple water heaters with remote controllers.  
The heaters will be required to be switched on using the ON/OFF button on a remote  
controller. Ensure that all taps/water outlets are closed and no water is flowing through  
heaters.  
Hot water system incorporating secondary recirculation pump.  
Single or multiple water heaters without remote controllers.  
The heater(s) will automatically reset without any user involvement.  
Single or multiple water heater(s) with remote controller(s).  
To reset the heaters follow the steps.  
1. Turn off all hot water taps.  
2. Turn off supply to secondary circulating pump or alternatively, if heater and pump  
are fed from the same electrical supply, isolate pump flow.  
3. Turn on heater at remote control.  
4. Select required temperature.  
5. Switch on supply to secondary circulating pump or open valve on pump flow.  
The heater will now be ready to supply water at the set temperature.  
If following the above procedure does not reset the heater switch it on and off at its main  
supply, and then go through these steps again. If heater is still not working call your local  
service agent or Rinnai for assistance.  
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WIRING DIAGRAM  
230 V  
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DIAGNOSTIC POINTS  
Diagnostic Points- To be read in conjunction with the wiring diagram.  
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SPECIFICATION  
Model………………………………………………..…....………………………..Infinity 24e  
Installation…………………………………………...………...……. External location only  
Fuel…………………………………………………..….……………...Natural Gas or LPG *  
Control………………………………………………….……………...……….…..Modulating  
Input……………………………………………………..………….……………....5.8 to 52 kW  
Exhaust type………………………………………..……..Forced Draught Direct Exhaust  
Ignition………………………………………………...…………….…………...…..Electronic  
Burner……………………………………………………...…………………...Stainless steel  
Weight…………………………………………………...……….……………..…..………18kg  
Water flow rate ………………………………………..……………….…...2.4** to 24L/min  
Minimum operating water pressure…………………..……….…………..……….1.4 Bar  
Connections  
Gas…………………………………………………………...….………………….…….3/4BSP  
Water Inlet………………………………………….………...…………………….……3/4BSP  
Water outlet…………………………………….………...………………………….…..3/4BSP  
Electrical Supply…………………………….…………..……………….230V AC 50Hz 1ph  
* Separate models available for Natural gas or LPG fuel.  
** Minimum flow rate based on temperature setpoint and inlet conditions.  
Rinnai are continually updating and improving products and reserve the right to  
alter model specifications without prior notice.  
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NOTES  
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SERVICE CONTACT  
Rinnai UK LTD.  
9 Christleton Court  
Manor Park  
Runcorn  
Cheshire  
WA7 1ST  
Tel. 01928 531870  
Fax.01928 531880  
Web.  
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COMMISSIONING CHECK LIST  
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