Rinnai E50C Guide

8U.52.65.00 /06.13 Changes reserved
High efficiency condensing gas boiler
E50C
Notice! This manual must be retained for future reference.
- Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
- WHAT TO DO IF YOU SMELL GAS
- Do NOT try to light any appliance.
- Do NOT touch any electrical switch.
- Do NOT use any phone in your building.
- Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
- If you cannot reach your gas supplier, call the fire
department.
WARNING!
If you do not follow these instructions exactly, a fire or
explosionmayresultcausingpropertydamage,personal
injury or loss of life.
Address: 103 International Drive, Peachtree City, GA, 30269
Toll-free: 1-800-621-9419 • Fax: [phone] • www.rinnai.us
User information manual
WARNING!
Installation and service must be
performed by a licensed professional,
service agency or the gas supplier.

Operating instructions Rinnai E-Series
2
Contents of instructions
These instructions contain important information for the safe use of Rinnai
E-Series gas boilers.
These user instructions are intended for the owner or responsible tenant of
the premises where the boiler is installed.
Subject to technical changes
Changes may be made to the illustrations, process steps and technical data
as a result of our policy of continuous improvement without prior notice.
Updating of documentation
Please contact us if you have any suggestions for improvements or
corrections.
Find our contact details on the back of this manual.

Operating instructions Rinnai E-Series
3
Please observe these instructions in the interest
of your own safety.
Safety and general instructions
The boiler is designed to heat water for a central
heating system and, if applicable, generating
domestic hot water. The boiler is delivered with
a burner controller pre-installed.The boiler can
be fitted with a modulating outdoor reset control
ARV12 (included), a room controller RS100
(optional), a zone controller (optional) or an
On/Off thermostat or relay panel end switch
(accessories).
Designated use
Hazard definitions
The following defined terms are used throughout
the documentation to bring attention to the
presence of hazards of various risk levels.
Noticesgiveimportantinformationconcerningthe
operation of the product.
DANGER:
Indicates the presence of hazards that
will cause severe personal injury, death or
substantial property damage.
WARNING:
Indicates the presence of hazards that
can cause severe personal injury, death or
substantial property damage.
CAUTION:
Indicates presence of hazards that will or
can cause minor personal injury or property
damage.
NOTICE:
Indicates special instructions on installation,
operation or maintenance that are important
but not related to personal injury or property
damage.
!CAUTION
!WARNING
NOTICE
i
!DANGER

Operating instructions Rinnai E-Series
4
These operating instructions describe the
operation of the Rinnai E-Series condensing
gas boilers. This manual is for the end user. For
installation and servicing there is a installation &
servicing instructions manual for the installer.
Readthis manual fully beforeoperating the boiler.
In case of doubt or errors contact your installer.
The manufacturer reserves the right to change
the specifications and dimensions without prior
notice.
Work on the boiler must be carried out by a State
licenced contractor, (Ref: Gas Safety Installation
and Use ) using correctly calibrated instruments
with current test certification.

Operating instructions Rinnai E-Series
5
Safety
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: If you do not follow these instructions
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
8U.34.01.01 / 11.12
A. This appliance does not have a pilot. It is equipped with an ignition device which automatically
lights the burner. Do NOT try to light the burner by hand.
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
- Do NOT try to light any appliance.
- Do NOT touch any electrical switch.
- Do NOT use any phone in your building.
- Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instructions.
- If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to push in or turn the gas control knob. Never use tools.
If the knob will not push in or turn by hand, don’t try to repair it, call a licensed professional.
Force or attempted repair may result in a fire or explosion.
D. Do not use this appliance if any parts have been under water. Immediately call a licensed
professional to inspect the appliance and to replace any part of the control system and any gas
control which has been under water.
OPERATING INSTRUCTIONS
1. STOP! Read the safety information above this label.
2. Turn off al electrical power of the appliance.
3. Set the thermostat or other operating control to the lowest setting.
4. This appliance is equipped with an ignition device
which automatically lights the burner.
Do NOT try to light the burner by hand.
5. Close main gas shut off valve.
6. Wait (5) minutes to clear out any gas. Then smell for
gas. Including near the floor.
If you smell gas, STOP! Follow “B” in the safety
information above on this label.
If you don’t smell gas, go to the next step.
7. Open main shut off valve.
8. Set the thermostat or other operation control to desired setting.
9. Turn on all electric power to the appliance.
10.If the appliance will not operate, follow the instructions “To Turn Off Gas To Appliance” and call your
service technician or gas supplier.
TO TURN OFF GAS TO APPLIANCE
1. Turn off all electric power to the appliance if service is to be performed.
2. Set the thermostat or other operating control to the lowest setting.
3. Close main gas shut off valve.
CLOSE
Manual Gas Valve (Main valve)
OPEN

Operating instructions Rinnai E-Series
6
Should overheating occur or the gas supply
fail to shut off, do not turn off or disconnect
theelectricalsupplytothepump.Instead,shut
off the gas supply at a location external to the
appliance.
Protection for corrosion
Donotuseanysprays,chlorinecontainingagents,
solvents, paint etc. around the boiler or around
the air intake supply entrance of the boiler. These
substanceshavenegativeinfluencesontheboiler
and can lead to corrosion resulting in failure of
the boiler.
!WARNING
NOTICE
i
Checking the water pressure
Check the water pressure in the central heating
installation regularly.
Use only potable water for filling.
Additives only after clearance by Rinnai.
Contact your installer in case of doubt.
Products to avoid present in boiler room
and/or around combustion air intake
Spray cans containing chloro-/fluorcarbons
Ammonium and/or ammonium solutions
Permanent wave solutions (hair product)
Chlorinated waxes and/or cleaners
Swimming pool chemicals based on chlorine
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents
found in household laundry rooms
Adhesives used to fasten building products and
other similar products
Areas likel
y
to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
Remodeling areas
Garages with workshops
!DANGER

Operating instructions Rinnai E-Series
7
The Rinnai E boiler is a room sealed, condensing
and modulating central heating boiler with an
integrated hot water facility.
The boiler is provided with a integrated control
system.Becauseanoutdoorsensor isconnected
totheboiler,theboilerworksweatherdependantly.
This means that the boiler control measures the
outside temperature and flow temperature. With
this data the boiler calculates the optimal flow
temperature for the installation.
When the boiler is connected to an RS100 room
thermostat information can be retrieved from the
boiler. For more information about the Rinnai
thermostats. Please refer to the user manuals.
On the bottom left side of the front panel there is a
smalldoor.Throughthetransparentpanelyoucan
see the boiler status on the display. After opening
this door you will find the function buttons.
Onthefollowingpagesyouwillfindtheexplanation
of the function buttons and display messages.
Description of the boiler

Operating instructions Rinnai E-Series
8
Explanation of the function buttons
Onlylicensedprofessionalswhoaretrainedfor
theseboilersarepermittedtomakealterations
in the controller to program the boiler to the
installation.
1. Display.
See following pages for further information.
2. ON-OFF Switch (Placed separately next to
theboiler).Thisswitchturnsthepowersupply
to the boiler on or off.
3. Central Heating program button.
Switching the Central Heating on or off (Led
on/off);
4. Hot Water program button.
Switching the Domestic Hot Water (DHW)
facility on or off (Led on/off);
5. Pump program button.
Whenthepumpprogram LEDisON,thepump
isswitchedinto a continuous circulationmode.
Whenthe pump modeis switched OFF,LED is
off the pump is control by the boiler processor.
Donotactivatethepumpprogrambutton. Call
yourlicensedprofessionalbeforeifalterations
to the boiler are required.
During freezing temperatures it is possible (when
thereisnooutsidesensorconnected),tomanually
place the circulation pump in constant circulation
mode, thus reducing the chance of freezing pipes
(garage, attic or other cold spaces / rooms) which
are sensitive to frost.
When the pump is switched
on continuously it can lead to
undesired heating up of the
central heating system during
the summer and adversely
effect the boilers operation.
NOTICE
i
NOTICE
i
NOTICE
i
1
3
4
5
6
2
7
8

Operating instructions Rinnai E-Series
9
6 Mode-button.
Only for Service personel
7 Step-button.
After briefly pressing, the water pressure can
be retrieved.
After pressing for 5 seconds it switches from
the Good-state to technical read out and vice
versa (see following pages);
8 Reset-button.
When a fault occurs it will be shown by the
flashing E (Error) with a number code after
which the boiler is shut down. After pressing
the reset key you can try to start the boiler
again. If the error message keeps occurring
contact your installer.
DO NOT attempt to make repairs or remove
any of the boiler panels. Contact a licensed
professional to make necessary repairs or
adjustments.
!WARNING

Operating instructions Rinnai E-Series
10
The boiler display
Two boiler displays, “Good or Technical” see below.
Good
or standard read out.
Duringthisreadingthedisplaywillonlyshowwhat
is necessary. Under normal circumstances the
display will give a Good reading. In case of a
fault this will be shown with, alternate display of
Good, with an Eor BL code. See further "Errors,
maintenance and warranty" .
Technical
The second way is a technical read out. In normal
situations the following will be shown:
• ontheleftthestatusinwhichtheboilerisactive
(see bottom of this page);
• on the right the supply temperature in °F;
• the water pressure in the installation in PSI.
Whenamessage(EorBLcode)isnecessarythis
will be shown instead of the technical read out.
To switch over from the Good-state to the
Technical read out (and vice versa):
- Press 5 sec. on the STEP-button.
Operation indication
(in the first display position by technical read out)
1
2
No heat demand
Fan pre/post purge
Ignition phase
Burner active on central heating
Burner active on DHW
Fan check
Burner off when room thermostat is demanding
Pump overrun phase for central heating
Pump overrun phase for hot water
Burner off because of to high flow temperature
Automatic de-aeration program (Press no button for 17 min.)
3
4
5
6
7
8
9
A
0

Operating instructions Rinnai E-Series
11
Water pressure in the central heating system
Theinstallationwillfunctionoptimallywithawater
pressure of between 16 and 18 PSI.
If the water pressure drops below 16 PSI, the
display will show FILL. During this message the
boiler will remain functioning at a reduced level.
After replenishing the system (see following
chapter) just above 22 PSI the message FILL
will disappear and the boiler will function normally
again.
Whenthewaterpressuredropsbelow10PSI,the
display will show a flashing FILL text.
Theboilerwillshutdownandwillfunctionnormally
again after replenishing the system to just above
22 PSI.
To retreive the water pressure on the display from
the Good reading:
- Press the Step key once briefly.
The water pressure will be shown.
Press the Step key briefly to return to the Good
reading.
Water pressure is too high (>42 PSI), if HIGH
indication remains continuously visible, the boiler
istakenoutofoperation.Theinstallationpressure
needs to be decreased by draining water until the
pressure is between 16 and 18 PSI.
Message'Waterpressure
too low' on your RS100
thermostat.
Onthedisplayofthe RS100
a low water pressure can
be indicated. For further
informationseetherelevant
user manual.

Operating instructions Rinnai E-Series
12
Replenishing the central heating system
The central heating installation needs to be filled with potable (drinking)
water. For topping up the installation you use the filling loop according to the
following procedure:
Contact your licensed professional installer if
your installation is not provided with a filling
loop.
1 Switch all functions off (heating, DHW and pump);
2 Briefly push the 'STEP'-button: P x.x = water pressure in PSI;
3 Slowly open the filling loop (Indication on display increases);
4 Fill up slowly to between 16 and 18 PSI;
5 STOP appears on the display;
6 Close the filling loop;
7 De-aerate the complete installation , start at the lowest point;
8 Check the water pressure and if necessary top it up;
9 Close the filling loop;
10 Activate functions required (heating , DHW and/or pump );
11 If A xx appears on the display, wait for 17 minutes;
12 Check the waterpressure and if necessary top it up to 16 to 18 PSI
13 Close the filling loop;
14 Press the ‘STEP’-button;
15 Be sure that the filling loop is closed.
After the automatic de-aeration programm (A xx) is finished the boiler will
return to the Good reading or Technical reading.
NOTICE
i

Operating instructions Rinnai E-Series
13
Holiday period:
Adjust the thermostat* to the holiday period. See
the user thermostat manual. The hot water facility
can be switched off by means of the program
button on the control panel.
Re-setting the central heating system:
Switch off the three program buttons , ,
when these are activated. Switch off the power
supply. When the boiler is being drained one
should take into account that a part of the heating
waterwillremainintheboiler.Whenriskoffreezing
arises one should take care that the remaining
centralheatingwaterintheboilerdoesnotfreeze.
Holiday
* If you have a RS100
thermostat it is provided
with a holiday program.
The holiday period can be
adjusted on the thermostat
itself. The central heating
and DHW supply are
switched off during that
period. There is also the
option that only the central
heatingisswitchedoff.With
all of these possibilities the
freeze protection system
is active.
The boiler will not function directly. The automatic de-aeration program of about
17 minutes will start after one of the three program buttons is pressed. The display
will show where Astands for Automatic de-aeration program Active and
the number on the right indicates the actual water temperature of the boiler.
Check the water pressure regularly and top up the installation when
necessary.
The working pressure of the installation should be between 16 and 18 PSI
It can take a while before all air has disappeared from a filled installation.
Especially in the first week noises can be heard which indicate the presence of
air. The automatic air vent in the boiler will remove the air, which means the water
pressure will reduce during this period and therefore topping up with water will
be necessary to adjust the flow water temperature
Turning the boiler off

Operating instructions Rinnai E-Series
14
Error, maintenance and warranty
If a fault is detected the boiler will be blocked.
This will be reflected, by an alternate display of
Good, with an Eof Error or a BL of Blocking and
a number code.
You can try to reset the boiler by pressing the
Reset key once. If the problem remains please
contact your installer and inform them about
the fault and give them the number code.
If you discover any leaks from the boiler
contact your installer.
We advise you to obtain a service contract
with your installer for regular maintance and
adjustment to keep your boiler safe and in
good condition.
The casing of the boiler consists of plastic
parts which can be cleaned with a normal non
abrasive cleaning agent.
Periodiccleaningofthecondensatecollectionand
disposal system must be carried out.
Before putting the boiler into operation after
periodic cleaning fill the condensate trap with
1.27 cups / 300 ml of water.
Step 1: Condensate trap
- first remove the screw (7);
- pull the condensation cup (8) downwards, out
of the condensate tray
Checkthisforimpurities.Iftherearenoimpurities
itisnotnecessarytocleanthecondensatecup;
- check the O-ring (9) of the cup and replace it if
necessary;
- clean the parts by flushing it with clean water;
- grease the O-ring again with acid free O-ring
grease to make fitting easier;
NOTICE
i
NOTICE
i
NOTICE
i
NOTICE
i
8
9
7

Operating instructions Rinnai E-Series
15
- if there is a leak at the condensate trap (8) replace
complete condensate trap by # 809000100;
Step 2: Refitting is done in reverse order.
Note that all gaskets seal completely.
Maintenance or changes to the appliance may only
be carried out by a licensed professional.
You canfind the warrantyconditions in thewarranty card
which is supplied with the boiler.
NOTICE
i

Details of your installer:
Name of installer:
Address:
Contact:
Phone number:
Phone number outside business hours:
E. & O. E.
This renewed publication cancels all previous installation instructions. The company reserves the right to change the specifications and dimensions without prior notice.
Distributor for the USA
Rinnai America Corporate • 103 International Drive • Peachtree City, GA 30269
Toll Free: [phone] • Tel: [phone] • Fax: (678)
829-1666 • E-mail: [email protected] • Internet: www.rinnai.us
800000047 06/2013