Rheem 743 series Instruction Manual

OWNERS GUIDE &
INSTALLATION INSTRUCTIONS
743 SERIES UNDERBENCH
BOILING WATER APPLIANCES

1
Importantinformaon 2
Installaonrequirements 3
InstallingtheDispensingTap 4
InstallingtheMixingTap 5
InstallingtheUnderbenchAppliance 7
Commissioning 8
SenguptheTimer 9
Operangtheappliance 12
UsingtheDispensingTap 13
Filterreplacement 14
Saveaservicecall 15
Specificaons 16
Watersupplies 17
RheemWarranty 18
Contents
This manual contains informaon on the installaon, commissioning and operaon of
RheemUnderbenchBoilingWaterAppliances.
ModelsdeliveringFiltered,BoilingandAmbientorChilledWater(3‐in‐1)
ModelsdeliveringFiltered,Boiling,HotandAmbientorChilledwater(4‐in‐1)
Please note that the external design of tapware shown in this manual may differ from
that in the package and depends on the model ordered. This does not affect the
instruconsgiveninthisinstruconmanual.
Rheem
UnderbenchBoilingWaterAppliance

2
This Boiling Water Appliance must be
installed and serviced by a qualified/
licensed person in accordance with
these installaon instrucons,
naonalplumbingandelectricalcodes
andlocalauthorityregulaons.
Should the appliance (including
electrical supply cord) become
damaged, contact Rheem Service to
arrangerepair.
This appliance is only intended to be
operated by persons who have the
experience or the knowledge and the
capabilies to do so. This appliance is
not intended to be operated by
persons with reduced physical,
sensory or mental capabilies i.e. the
infirm,or by children. Children should
be supervised to ensure they do not
interfere with the Boiling Water
Appliance.
Rheem recommend the use of the
dispensing tap safety funcon
requiringtwofingeroperaon.
Removal of the appliance’s jacket will
expose230‐240Vwiring.
The jacket must only be removed by
anauthorisedorqualifiedpersonaer
theappliancehasbeenisolated.
• Powerturnedoffandapplianceplug
removedfromwallsocket.
• Watersupplyisolatedatsupplyinlet
valve.
In order to avoid a hazard due to
inadvertent reseng of the thermal
cut‐out, this appliance must not be
suppliedthroughanexternalswitching
device, such as a mer, or connected
to a circuit that is regularly switched
on and off by the ulity. If med
operaon is required, refer to the
secon "Seng up the Timer" on
page9.
For your protecon and safety this
appliance is fied with a number of
safety devices. Do not modify this
appliance or associated dispensing
tap. Doing so will void warranty and
potenally cause a hazard. Avoid
spillageonapplianceconnector.
This appliance contains electronic
equipment and 500V insulaon tests
must only be conducted between
acveandearth,andbetweenneutral
andearth.
Protectfromfreezing. If theappliance
istobe switched off foranylengthof
me and freezing is a possibility, the
watersupplymustbeisolatedandthe
appliancedrained.
This appliance is suitable for most
public water supplies, however, in
some areas the water quality may
have detrimental effects on the
appliance and fings. If you are in a
known bad water area you must first
read page 17: Water Supplies. If you
are not sure, have your water quality
checked against the condions
describedonpage17.
ThankyouforchoosingaRheemUnderbenchBoilingWaterAppliance.Pleasetakeafewminutestoreadthismanualasit
containsimportantinformaonaboutthecorrectinstallaonandoperaonofyourappliance.
ThismanualappliestoRheem3‐in‐1andRheem4‐in‐1UnderbenchBoilingWaterAppliancesandDispensingTaps.
If the installaon includes a Rheem Water Chiller, the separate Water Chiller Instrucon Manual should be read in
conjunconwiththeseinstrucons.
Thisapplianceisintendedtobeusedinhouseholdandsimilarapplicaonssuchas:
–staffkitchenareasinshops,officesandotherworkingenvironments
–farmhouses
–byclientsinhotels,motelsandotherresidenal‐typeenvironments
–bedandbreakfast‐typeenvironments.
Importantinformation
WARNING
Toensurethesafeoperaonofthisappliancepleaseobservethefollowing;

3
Installationrequirements
Servicesrequired
Electrical: 10A earthed 3 pin Socket
Outletsitedinthecupboardwherethe
appliancewillbeinstalled.
NOTE: Where a Rheem Chiller is
installed, the Underbench Boiling
WaterAppliancesuppliespowertothe
chiller. The combined maximum
current drawn is not more than 10
amp.
If a third‐party chiller is installed, an
addional socket outlet may be
required.
Water supply: A potable water
supplyterminatedwithastoptapwith
15mm(½”)threadedoutlet.
SupplyPressure
AS/NZS 3500.1 requires a maximum
supplypressureof500kPa.Wherethe
mains water supply pressure exceeds
this,apressurelimingvalveshouldbe
installed.
For opmum performance, observe
the pressure ranges stated in the
abovetableforyourappliance.
A 3‐in‐1 appliance will operate at
pressures lower than 250 kPa but
deliverywillbeaffected.
The mixing tap in a 4‐in‐1 appliance
requiresaminimumsupplypressureof
300kPa(250kPadynamicpressure).
Where a pumped supply is connected
totheappliance,caremustbetakento
prevent water hammer. Damage from
waterhammerwillvoidwarranty.
This Underbench Boiling Water
Appliance, hereaer referred to as
"Appliance", is only suitable for
indoorinstallaon.
Theapplianceshouldbeplacedinthe
cupboard beneath the bench the
dispensingtapistobemountedon.
Before installaon commences, plan
thesetout.
When the installaon includes a
chiller,thereareaddionalvenlaon
requirements. Please refer to the
chiller installaon manual before
proceeding.
Tapware should be posioned for the
convenience of users. Allow sufficient
clearance around tapware for
operaon.
In a 3‐in‐1 installaon, a single
dispensing tap is installed. In a 4‐in‐1
installaon, an addional mixing tap
willbeinstalled.
The dispensing tap outlet must be
over a sink or drained outlet. Where
the dispensing tap cannot be
posioned over a sink, a sink‐free
oponisavailable.
In a4‐in‐1 installaon, the mixing tap
outletmustdischargeintoasink.
Please refer to pages 4 and 5 for
tapwareinstallaonanddimensions.
Ensure that the air vents on the
appliance are clear of obstrucons at
all mes. Leave at least 50mm
clearance around the vents to allow
airflow.
The appliance must be posioned in
the cupboard within reach of the
conneconstothetapware.
Locationandsetout
Max Min
3‐in‐1 500kPa 250kPa
4‐in‐1 500kPa 300kPa

4
The design of the Dispensing Tap will
vary depending on the model
purchased.
The tap must be posioned on the
benchtopwiththeoutletoverasink.
All Dispensing Taps are mounted
through a Ø35mm hole drilled in the
benchtop.
Before drilling the mounng hole
ensure that there is sufficient
clearancebeneaththebenchtofixthe
MounngWasherandClampPlate.
TheWasherhasaself‐adhesivegasket
on one face. Remove the backing
paperandposiontheWasheragainst
the underside of the bench aligned
concentrictothedrilledhole.
FittheBaseRingandsealingO‐Ringto
thetapasshown.
Pass the tap communicaons cable
through the bench hole and mount
the tap in posion on bench ensuring
the sealing O‐Ring is sing in the
grooveoftheBaseRing.
Fitthe ClampPlateontothetapstud
and screw the Clamp Nut onto the
studtosecurethetaptothebench.
In ghtening the Clamp Nut, ensure
that the communicaons cable is free
andnotpinched.
Refer to page 7 for the connecons
between the Dispensing Tap and
UnderbenchAppliance.
SinkFree&Extended
Taps
If a Sink Free or Extended Tap Kit has
been supplied forinstallaon, referto
the separate installaon instrucons
suppliedwiththekit.
InstallingtheDispensingTap
BaseRing
O‐Ring
ClampPlate
Washer
ClampNut
Benchhole
Ø35mm
Boilingwater
Redpipe
Filtered/chilledwater
Bluepipe
Vent
Unmarkedpipe
Adaptorfing
Filtered/Chilledwater
TapSignal
8pinheader
Bench
max50mm
BaseRing
Ø52mm
Washerclearance
Ø75mm

5
InstallingtheMixingTap
To ensure opmum performance of the mixing tap
and customer sasfacon, please read these
instrucons.
This Mixing Tap is designed solely for connecon to
theBoilingWaterApplianceitissuppliedwith.
The Mixing Tap must not be modified in any way.
Doing so will possibly make the product inoperable
andwillvoidwarranty.
Beforedrillingintothebenchtop,considertheset‐out
and posioning of the Mixing Tap and Boiling Water
Tap.Refertopage3onsetout.
Asuitableisolaonvalveisrequiredontheinletwater
supply.
In accordance with good plumbing pracce, a line
strainer should be fied to the supply to eliminate
damage to the Mixing Tap's ceramic cartridge from
suspendedsolids.
AS/NZS 3500.1 specifies a maximum stac pressure
within buildings of 500 kPa at any outlet and notes
thatpressuresabove500kPacancausedamagefrom
waterhammer,reducethelifeofappliances,tapsand
fings,andcauseexcessivenoiseinthesystem.
Rheem recommends the installaon of a 500 kPa
pressurelimingvalveinthesupplytothemixingtap
ifthestacsupplypressureisgreaterthan500kPa.
Flushoutallpipeworkpriortoinstallaon.
Donotkinkortwistflexibleconnectors.
Before starng any installaon, please consider the
following:
• Before drilling, check that there are no hidden
electrical wires, cables or water supply pipes and
thatthereissufficientclearancefortheClampPlate
beneath the benchtop where the tap is to be
mounted.
• ThathosescanreachtheBoilingWaterAppliance.
Deliveredwatertemperature
When installed in accordance with these instrucons,
the maximum hot water temperature delivered from
theMixingTapis62°C.
Measuredwithinletcoldwater25°C.
Theinstruconsonthispageandthefollowingpageapplyto4n1installaonswithamixingtap.Ifyourinstallaonisa3n1
thissecondoesnotapply.Pleaseturntopage7.
Benchmax50mm
BenchholeØ35mm
WasherclearenceØ52mm
BaseRingØ60mm

6
InstallingtheMixingTap
IMPORTANT
Thethreeflexiblehosesmustbeconnectedtothecorrect
portsonthemixer.
ConnectBLACKhosetoportmarkedBLK
ConnectBLUEhosetoportmarkedBLUE
ConnectREDhosetoportmarkedRED
Screwtheflexiblehosesintothreadedportsinthebaseofthe
mixerbodyunlboomedensuringtheo‐ringsealisnotcut.
O‐Ring
FixingStud
Washer
ClampPlate
ClampNut
ConnectBLUEHOSE
fromMixingTapto
coldwatersupply
ConnectBLACKHOSE
frommixingtap
tounionmarked
MIXERBLACKHOSE
ConnectREDHOSE
frommixingtap
tounionmarked
MIXERREDHOSE
InletWatertoAppliance.
ConnectPLAINHOSE
tounionmarked
SUPPLYINLET
ColdWaterSupply
IsolaonValve
BaseRing

7
InstallingtheUnderbenchAppliance
ConnectionstowatersupplyandDispensingTap
AllconneconstotheBoilingWaterApplianceareonthetopfaceandarelabelled.
Therequiredhosesandpipesaresuppliedwiththeappliance.
A 15mm flexible hose is provided to connect the inlet supply water from the site isolaon valve to the fing marked
SUPPLYINLET.
TheconneconstotheDispensingTapareshownonpage4.
PushtheendofthesuppliedsilicontubeovertheDispensingTap'sVentpipeaminimumof12mm.Leadthesilicontubeto
theconneconontheappliancemarkedVENT.ThesilicontubemusthaveconnuousfallfromtheDispensingTapwithno
ghtbendsorkinks.Markthesiliconattherequiredlength,allowing12mmforfingtotheapplianceventconnecon.Cut
thesilicontubetolengthandfittotheapplianceventconnecon.
RepeatthisfortheconneconbetweentheDispensingTap'sBoilingWaterpipeandapplianceBOILINGOUTLETconnecon.
When a chiller is installed the water supply to the chiller is taken from the Boiling Water Appliance's FILTERED OUTLET, a
6mmpush‐fitconnecon.UsethesuppliedwhiteØ6mmtube.Pleaserefertothechillerinstrucons.
Wherenochillerisinstalledfitthesuppliedpush‐fitAdaptorFingtotheFiltered/ChilledWaterpipeoftheDispensingTap.
ConnectthewhiteØ6mmtubebetweentheFILTEREDOUTLETandtheAdaptorFing.
ConnecttheTapSignalcable totheAppliance Tap Signal, matching8pinheader,ensuring theorientaonoftheheaderis
correct.
Tapware
The design of the tapware supplied depends on
themodelordered.
The illustraons show the required connecons
andarecommontoalltapwaredesigns.
Where no Mixing Tap is to be installed (3‐in‐1
models)therewillbenoMixingTap connecons
ontheappliance.
Ventilation
Wherenochillerisinstalled,thecupboarddoors
must be kept ajar to increase venlaon to the
appliance.
This is achieved by applying the supplied 4mm
adhesive spacers/bump‐ons to the inner centre
corners (opposite to hinged ends) of each
cupboard door. Four spacers/bump‐ons are
suppliedwiththeDispensingTapkit.
Chillerinstallations
Forinstallaonswherea chilleristobeinstalled,
please refer to separate instrucons supplied
withthechiller.
A chiller will have specific venlaon
requirements, refer to the chiller's installaon
instrucons.
Before proceeding to commissioning, ensure
installaonofchilleriscomplete.
15mmFlexibleHose
InletConnecon
TapSignal8PinHeader
Ø12mmSiliconTube
BoilingWater
Ø12mmSiliconTube
Vent
Ø6mmPipe
FilteredWater
MixingTap
DispensingTap
PipeAdaptorFing
ChillerSignal4PinHeader

8
Commissioning
On inial start‐up, the Boiling Water
Appliance automacally runs through a
calibraoncycletodetecttheboilingpointof
water.Duringthiscalibraoncycle,steammay
discharge from the Dispensing Tap vent for a
short me. Calibraon only occurs once on
inital power on and will take approximately
ten minutes. When complete the appliance
will commence operaon. To completely fill
the appliance will take up to 18 minutes
dependingontheunitcapacity.
It is important NOT to operate either the
Dispensing Tap or Mixing Tap during the
calibraon cycle because it may affect the
calibraonoftheunit.
• Checkallconneconshavebeeninstalledas
detailedintheinstallaonsecon.
• Opensupplywaterisolaonvalve.
• Checkforleaks.
• PlugtheAppliancepowercordplugintothe
outletsocketandswitchon.
• The Timer display on the front of the
Appliance will switch on and the Appliance
willbegintofill.
• The green light on the Dispensing Tap will
flash and the Timer will display the
calibraonmessage.
• When calibraon is complete the Timer
displaycalibraonmessagewillbereplaced
bytheREADYmessage. The DispensingTap
indicatorwillshowasteadygreenlight.
Remove the Baery Pull Tab strip. Grasp the
freeendandpullupunltheTabstripisfree.
This acvates the backup baery power for
the Timer to maintain your sengs in the
eventofapowerfailure.
• Set the Timer to suit owner's requirements,
refertoPage9‐TimerSetup.
• SettheFilterLife,refertoPage10‐FilterLife.
WaterChillers
WhereaRheemChillerisinstalledthechillerpowerissuppliedfrom
the Boiling WaterAppliance andthe chiller signal connecon allows
controlofthechiller.
Thirdpartypushthroughwaterchillers
The Boiling Water Appliance can be installed with a third‐party
stand‐alonechilleronlyifthechillerisapush‐throughtypedevice.
A third‐party water chiller will require its own independent power
supply.TherearenoelectricalconneconsbetweentheBoilingWater
Applianceandathird‐partychiller.
Connect the Filtered outlet on the Boiling Water Appliance to the
inletconnecononthethird‐partychiller.
Connect the outletonthethirdpartychillertothe Cold Waterpipe
ontheDispensingTap.
BaeryPullTab
ChillerPowerSupply
ChillerSignal
(4Pinheader)

9
SettinguptheTimer
The Timer on the front of the Boiling Water Appliance provides the
userinterfacetoviewcurrentinformaonandsetvariousparameters
controllingtheoperaonoftheappliance.
Forpowersaving,theappliancecanbesettoAUTOmode;itwillthen
switchoff(sleep)overnightbasedontheprogrammedON/OFFmes.
The ON/OFFmescanbe adjustedtosuit usagepaernsduringthe
week.
A sleep mode is also available when the appliance is in AUTO mode.
Sleep mode will shutthesystemdownaera user specified me of
nouse.
Theappliance willwake fromsleepmodeautomacallywhenauser
operatestheDispensingTaporpushesabuonontheTimer.
If a Rheem Chiller is installed, the operaon of the chiller will be
managedbytheTimer.
TheTimeralsoprovidesaccesstovariousservicefunconsexplained
below.
MakingTimerselections
PresstheProgbuonunlthedesiredmenuisdisplayed
on the screen. Press the Accept buon to confirm
selecon and enter the menu. When in a menu item is
selected, values are changed using the Up buon and
Acceptbuon.
Pressing the Cancel buon at any me returns to the
main menu. Any changes previously accepted will be
retained.
Note: The display will revert back to main menu
from any mode if a button has not been pressed
foroneminute.
SettingtheDayandTime(24hr)
Prog=>Clock=>Accept
DisplayShows:SetClockDay
PressUptoselectday.PressAccept
DisplayShows:SetClockHOUR
PressUptoselecthour.PressAccept
DisplayShows:SetClockMIN
PressUptoselectminute.PressAccept
SettingTimerMode
Prog=>TimerSTD/AUTO=>Accept
DisplayShows:STD
PressUptoselectAUTO.PressAccept
NOTE:UptogglesSTDAUTOoption
NOTE:AftersettingAUTO,checktheON/OFFtimesettings
MainMenuSelection
Press"Prog"tocyclethroughmenu
Clock
TimerSTD/AUTO
SetON/OFFTime
SleepDelayTime
FilterLife
Service
ChillerSelect
ChillerTemp
ColdTapTime
HotTapTime
KeyLock
Press"Accept"toselectchoice