Rinnai REU-V2520FFUD User Manual

Operation / Installation Manual

To Suit Models:

REU-V2520FFU........ R53

REU-V2520FFUC..... C53

REU-V2532FFU........ R85

REU-V2532FFUC...... C85

REU-V2520FFUD......

REU-V2520FFUCD... C53PLUS

REU-V2532FFUD...... R85PLUS

REU-V2532FFUCD... C85PLUS

(Residential and Commercial indoor unit)

R53PLUS

ANS Z21.10.3=CSA 4.3

WARNING: If the information in these instructions is not followed exactly, a re

or explosion may result causing property damage, personal injury or death.

– 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.

Installation and service must be performed by a qualified installer, service agency

–

or the gas supplier.

V2532FFU

V2532FFUD

15,000

180,000

120°F 140°F 120°F 140°F

140°F 185°F 140°F 185°F

98°F 120°F

49 Lbs.

87%

49 dB (A)

Normal

75 watts

Standby

5.5 watts

Anti-frost Protection

100 watts

Electronic Fixed None

Natural Gas

6" W.C.

Propane

10" W.C.

Natural Gas

10.5" W.C.

Propane

13.5" W.C.

Ignition System

Water Temperature Control

Water Supply Pressure

Electric Connections

Minimum Water Pressure: 20 PSI (Recommended 30-80 PSI for maximum performance)

Safety Devices

Maximum Water Supply Pressure

Remote Control Cable

Flame Failure - Flame Rod

Boiling Protection - 210°F

Over Current - Glass Fuse (3 amp)

Remaining Flame (OHS) 207°F Bi-Metal Switch

Thermal Fuse 264°F

Direct Electronic Ignition

Appliance: AC 120 Volts, 60Hz. Remote Control: DC 12 Volts (Digital)

Simulation Feedforward and Feedback.

Gas Supply: 3/4" MNPT, Cold Water Inlet: 3/4" MNPT, Hot Water Outlet: 3/4" MNPT

Model

Minimum Gas Consumption Btu/h

Maximum Gas Consumption Btu/h

With or without remote controls, mounted in kitchen, bathroom, ect.

Connections

By-Pass Control

Minimum

Gas Supply

Pressure

Maximum

Gas Supply

Pressure

Type of Appliance

Operation

Exhaust System

Approved Gas Type

Electrical

Consumption

Hot water capacity, (50°F rise)

Hot water capacity, (35°F rise)

Default Temperature Setting (no controller)

Maximum Temperature Setting

Minimum Temperature Setting

Weight

Noise level

Efficiency Rating

Automatic Frost Protection - Bi-Metal Sensor & Anti-Frost Heaters

Combustion Fan RPM Check - Integrated Circuit

150 PSI

Non-Polarized Two Core Cable

0.6 to 5.3 GPM

0.6 to 5.3 GPM

Direct Vent - Forced Combustion

Natural Gas or Propane - Ensure unit matches gas type it's being installed on.

0.6 to 6.5 GPM

0.6 to 8.5 GPM

Temperature controlled continuous flow gas hot water system.

104°F 140°F 104°F 140°F

Controller Default Temperature Setting

V2532FFUC

V2532FFUCD

V2520FFU

V2520FFUD

V2520FFUC

V2520FFUCD

S P E C I F I C A T I O N S

NOT E: Rin na i is con ti nua ll y up da ti ng a nd i mp rov in g pr od uct s, the re fo re, spe ci fi cat io ns are

subject to change without prior notice. Local, state, provincial and federal codes must be adhered

to prior to installation.

Rinnai America

2

FF Models

L I M I T E D W A R R A N T Y

R i n n a i W a t e r H e a t e r

WHAT IS COVERED?

This Warranty covers any defects in materials or workmanship when the product is installed and

operated according to Rinnai written installation instructions, subject to the terms within this limited

warranty document. This Warranty applies only to products that are installed by a state qualied

or licensed contractor. Improper installation may void this Warranty. Rinnai strongly suggests

that you use an installer who has attended a Rinnai product knowledge class before installing

this water heater. This Warranty extends to the original purchaser and subsequent owners, but

only while the product remains at the site of the original installation. This Warranty only extends

through the rst installation of the product and terminates if the product is moved or reinstalled at

a new location.

HOW LONG DOES COVERAGE LAST?

Warranty031705COMM-V2

Item

Commercial Residential

Heat Exchanger 5 Years* 10 Years*

All other Parts and

Components

Reasonable Labor 1 Year

Period of Coverage

5 Years* 5 Years*

*Important

Period of coverage is 3 years from date of purchase when used as a circulating water heater

within a hot water circulation loop, when the water heater is in series with a circulation system

and all circulating water ows through the water heater.

WHAT WILL RINNAI DO?

Rinnai will repair or replace the product or any part or component that is defective in materials

or workmanship, except as set forth below: Rinnai will pay reasonable labor and shipping costs

to repair the product. All repairs must be performed using genuine Rinnai parts. All repairs or

replacements must be performed by an individual or servicing company that is properly trained,

state qualied or licensed to do this type of repair.

Replacement of the product or replacement of the heat exchanger may be authorized by Rinnai

only. Rinnai does not authorize any person or company to assume for it any obligation or liability

in connection with the replacement of a product or heat exchanger. If Rinnai determines that

repair of a product is not possible, Rinnai will replace the product with a comparable product, at

Rinnai’s discretion. If a component or product returned to Rinnai is found to be free of defects in

material or workmanship, or damaged by improper installation or damaged during return shipping,

the warranty claim for product, parts and labor may be denied.

Rinnai America

3

FF Models

L I M I T E D W A R R A N T Y

Ri nn ai Wat er H ea te r

Warranty031705COMM-V2

HOW DO I GET SERVICE?

Simply contact a qualied Service Dealer or Installer for the repair of products under this Warranty.

Failure to use a qualied Service Dealer or Installer to provide repair service may void the

Warranty. For the name of the qualied Service Dealer or Installer nearest you, please contact

the company that installed the water heater, or;

Your local HVAC/plumbing dealer, gas service technician or place of purchase

•

Visit the Rinnai website www.rinnai.us

•

Call Rinnai at 1-800-621-9419 or write to Rinnai, 103 International Drive, Peachtree City, Georgia

•

30269

Proof of purchase is required to obtain warranty service. You can show proof of purchase with a

dated sales receipt, by completing and mailing the enclosed Warranty registration card within 30

days of purchasing the product or by registering online at www.rinnai.us . Please complete the

Warranty registration either online or mail it to Rinnai at the address shown on the card.

Receipt of warranty registration by Rinnai will constitute proof-of-purchase for this product.

However, Warranty registration is not necessary in order to validate this Warranty.

WHAT IS NOT COVERED?

This Warranty does not cover any failures or operating difculties due to accident, abuse, misuse,

alteration, misapplication, acts of God, improper installation, improper maintenance or service,

inadequate water quality, scale buildup, freeze damage or for any other causes other than defects

in materials or workmanship. This warranty does not apply to any product whose serial number or

manufacture date has been defaced. This Warranty does not cover any product when used as a

pool or spa heater. (See Water Quality in Care & Lime Section.)

Rinnai is not liable for any special, incidental, indirect or consequential damages that may arise,

including damage to person or property, loss of use, failure to install drain pan under unit, or

inconvenience. Some states do not allow the exclusion or limitation of incidental or consequential

damages, so the above limitation may not apply to you.

LIMITATION ON IMPLIED WARRANTIES

Any implied warranties of merchantability and tness arising under state law are limited in duration

to the period of coverage provided by this limited Warranty, unless the period provided by state law

is less. Some states do not allow limitations on how long an implied Warranty lasts, so the above

limitation may not apply to you.

This Warranty gives you specic legal rights, and you may also have other rights which vary from

state to state.

Rinnai America

4

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C O N T E N T S

Specications .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... ... 2

Limi ted Warra nty .. ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... 3,4

Owne r ’s I nsta lla tion In for mati on ... ... .... ... .... ... .... ... .... ... .... ... .... ... ... 6

Feat ure s of Your New Wate r He ate r ... ... .... ... .... ... .... ... .... ... .... ... ... 7

Safe ty Issue s . ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... .. 8

Basi c O pera tio n ...... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... 9

Abou t H ot Water ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... 10

Scal ds- Firs t A id ... .... ... .... ... .... ... .... ... .... ... ... .... ... .... ... .... ... .... ... .... .. 1 0

Gene ral Con tro ller In for mati on ....... ... .... ... .... ... ... .... ... .... ... .... ... ... 11

Remo te Contr oll er Opera tio n ... ... .... ... .... ... .... ... .... ... .... ... .... ... .... .. 1 2

Delu xe Contr oll er .. .... ... .... ... .... ... .... ... .... ... .... ... .... ... . 13, 14, 15,1 6,1 7

Cont rol lers Se t P atte rn/ Temper atur e Table s . .... ... .... ... .... ... .... ... .. 1 8

Erro r M essa ges .. .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... 19 ,20

Main ten ance & Serv ice Info rmat ion .... .... ... .... ... .... ... .... ... .... .. 21 ,22

Trouble Sh oot ing and Comm on Q ues tion s ..... ... .... ... .... ... .... ... ... 23

For Your Sa fety Re ad Befor e O per atin g ....... ... .... ... .... ... .... ... .... . 2 3

Oper ati ng I nst ruct ion s ..... ... .... ... ... .... ... .... ... .... ... .... ... .... ... .... ... .... . 24

Care & Lime Con dit ion Warning ... .... ... .... ... .... ... .... ... .... ... .... ... .. 2 4

Inst all er ’s I nst ruct ion s ... ... .... ... .... ... .... ... .... ... .... ... .... ... .... ... .... 2 5-5 0

Rinnai America

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O W N E R ’ S I N S T A L L A T I O N I N F O R M A T I O N

All R innai wate r hea ter( s) MU ST be installed by a state qualied or licensed

cont racto r. F ailu re to comp ly wi th st ate a nd lo cal c odes pert aini ng to w ater

heat er ins tall atio ns ma y voi d the warr anty on yo ur ne w wat er he ater (s). It is

the r espon sibi lity of th e per son h avin g the wate r hea ter i nsta lled to en sure

the i nstal ling cont ract or ha s pro per l icen ces a nd pe rmit s for inst alli ng

wate r heat er(s ) in y our l ocat ion. In ad diti on to lice nsin g and perm its, Rinna i

enco urage s all inst alli ng co ntra ctor s to a tten d a pr oduc t kno wled ge cl ass

befo re ins tall ing a ny of our w ater heat ers t o hel p ins ure m axim um cu stom er

sati sfact ion a nd ma ximu m war rant y cov erag e. Fa ilur e to c ompl y wit h sta te

and l ocal c odes may r esul t in n on-c ompl ianc e and may v oid t he wa rran ty of

the w ater h eate r(s) .

This appl iance mus t be ins talled in accordance with local codes, or i n the ab-

sence of local codes, the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or

the CSA B149.1, Natural Gas and Propane Installation Code.

Inst all th is pr oduc t ind oors ONLY, DO NOT inst all o utdo ors.

Do No t use t his a ppli ance if an y par t has been unde rwat er. Immed iate ly ca ll

a qualied service technician to inspect the appliance and to replace any

part of the cont rol s yste m and any g as co ntro l whi ch ha s bee n und erwa ter.

Deta iled i nstr ucti ons o n the prop er in stal lati on pr acti ces t o fol low f or the

inst allat ion o f you r new hot w ater heat er(s ) are incl uded at th e bac k of t his

manu al.

Rinnai America

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FF Models

F E A T U R E S O F Y O U R N E W W ATE R H E AT E R

T he Ri nnai Water He ater is on e of t he mo st ad vanc ed wa ter h eate rs ava ilab le.

?

It su pplie s hot wate r con tinu ousl y at t he te mper atur e pre set i n the unit or at t he

temp eratu re se t on t he op tion al re mote cont roll er(s ). In stal lati on of remot e con trol ler( s)

are r ecomm ende d for opti mum p erfo rman ce.

T he Ri nnai Water He ater neve r run s out of ho t wat er. W hile elec trici ty, w ater and g as

?

supp lies a re co nnec ted, the R inna i Water H eate r pro duce s hot wate r whe neve r the hot

tap i s open .

T he ga s bur ner l ight s aut omat ical ly whe n the hot w ater tap i s ope ned, and g oes o ut

?

when the ta p is c lose d. Ig niti on is elec tron ic, t here is no pilo t lig ht. W hen th e hot wate r

tap i s off, no ga s is u sed. You s ave e nerg y and mone y wit h the Rinn ai Water Heat er.

T he te mper atur e of t he ou tgoi ng ho t wate r is c onst antl y mon itor ed by a bui lt in sens or. I f

?

the t emper atur e of t he ou tgoi ng wa ter r ises to mo re th an 6 d egre es ab ove t he sel ecte d

temp eratu re (s hown on th e dig ital remo te co ntro l) th e gas burn er wi ll au tomat ical ly go

out. The ga s bur ner w ill r e-ig nite once the o utgo ing h ot wa ter t empe ratu re fal ls be low t he

sele cted t empe ratu re.

B uilt into the m icro proc esso r of t he Rin nai Wat er He ater is th e abil ity t o LIM IT TH E

?

MAXI MUM TE MPER ATUR E of t he ho t wat er su ppli ed by the R inna i Wat er He ater s.

With out th e con nect ion o f a re mote cont roll er(s ), th e Rin nai Wate r Hea ter i s pre set t o

deli ver wa ter a t 120OF (Re siden tial ) and 140OF (Co mmerc ial) .

R esid enti al Un it: W ith t he re mote contr olle r(s) the w ater temp erat ure i s adj usta ble f rom

?

98 to 140

120OF without the use of a remote controller unit.

C omme rcia l Uni t: Wi th th e rem ote c ontro ller the w ater temp erat ure i s adj usta ble u p to

?

E rror mess ages are d ispl ayed on th e opti onal remo te co ntro ller (s), simp lify ing s ervi ce

?

The Rinnai Water Heater incorporates a device to minimize temperature uctuations (cold

?

T he so und ( nois e) le vel f rom t he Ri nnai W ater Heat ers i s ver y low .

?

O

185

without the use of a remote controller unit.

call s.

water sandw ich ef fect) when t he wat er is o ff, the n on ag ain. T his ef fect c an be e limin ated

by in stall ing t he Ri nnai Wate r Hea ters with a cir cula tion loop with a sma ll sto rage tank .

O

F. The water temperature cannot be set to a temperature other than

F. The water temperature cannot be set to a temperature other than 140OF

The Rinnai Water Heater is a very compact direct vented device. It saves valuable oor

?

and w all sp ace.

Rinnai America

7

FF Models

HOTHOT

COLD

ON!ON!

100oF

140oF

S

O

L

V

E

N

T

HOTHOT

COLD

ON!ON!

98 F

o

o

110 F

HOTHOT

COLD

ON!ON!

HOT!

HOTHOT

COLDCOLD

ON!ON!

B A S I C O P E R A T I O N

1

Adjusting Temperature

The o utlet wate r tem pera ture of th e Rin nai

Water He ater can o nly b e adj uste d by

the u ser us ing t he re mote cont roll er(s ).

To adju st th e set poin t temp erat ure o f

the R innai Water H eate r, a ll hot wate r

taps must b e clo sed, and a ll ci rcul atin g

pump s turn ed off (whe re ap plic able ). The

temp eratu re di spla yed o n thi s rem ote

cont rolle r wil l als o be d ispl ayed on al l

othe r remo te co ntro ller (s).

NOTE: TEMPERATURE CANNOT BE

ADJUSTED EXCEPT BETWEEN 98°F AND 110

°F WHEN ANY HOT WATER TAP IS OPEN.

To take cont rol o f the Rinna i Water Heat er

2

all h ot wat er ta ps mu st be clos ed. P ress

the " Prior ity b utto n" on the C ontr olle r you

want to set the t empe ratu re wi th, a nd

the g reen " Prio rity " ind icat or li ght w ill

3

Simp ly pre ss th e or butt on

unti l the r equi red t empe ratu re is

disp layed on th e Dig ital Moni tor.

There is a hot water

scald potential if the

thermostat is set to high.

NOTE: CHECK LOCAL CODES FOR

THE MAXIMUM WATER TEMPERATURE

SETTING ALLOWED WHEN USED IN

NURSING HOMES, SCHOOL, DAY CARE

CENTERS, AND ALL OTHER PUBLIC

APPLICATIONS.

4

Rinnai America

glow. This i ndic ates that the R inna i Water

Heat er is r eady to su pply hot w ater at

the s et tem pera ture as so on as a tap is

open ed.

Note : Rinn ai Wate r Hea ter w ill n ot pro vide

hot w ater i nsta ntly at th e hot wate r

xtures. Any cold water existing in the hot
water lines must be purged rst.

CHECK WATER

TEMPERATURE BEFORE

ENTERING SHOWER OR

BATH.

9

To operate t he Ri nnai Water He ater

simp ly tur n any hot w ater tap o n.

This w ill au tomat icall y ligh t the b urner

prov iding hot w ater at th e pre set

temp eratu re. I f the opti onal remo te

cont rolle r(s) have been inst alle d, th e

red “ IN USE ” ind icat or wi ll gl ow on

all r emote cont roll er(s ).

NOTE: If a newly installed unit has not

been powered for at least six hours then

the temperature will return to the default

setting if power is interrupted.

FF Models

A B O U T H O T W A T E R

Hot Water I s D ang erou s, espec ial ly for t he youn g an d t he elder ly or

the inrm. The Rinnai Water Heater allows you to precisely control the

temp era ture of yo ur h ot wate r, ensu ring sa fe hot w ate r t empe rat ures .

Water Tempe ratu res o ver 1 25°F can ca use

seve re bur ns in stan tly o r dea th fr om sc alds .

Hot Water can cause rst degree burns with

expo sure f or as litt le as :

3 se cond s at 1 40 °F

20 sec onds at 13 0 °F

8 mi nute s at 120 ° F

Test th e tem pera ture of the wate r wit h you r

elbo w befo re pl acin g a ch ild i n the bath or

show er.

Do not leave a child or an inrm person in

the b ath un supe rvis ed.

BURN

S c a l d s - F i r s t A i d

1) Remove clothing; Remo ve al l wet clot hing , qui ckly. Wet clo thin g ret ains the h eat.

2) Apply cold water for 30 minutes; Imm edia tely subm erge the b urnt area in co ld

wate r for 3 0 min utes to re duce the h eat i n the skin , pre vent ing d eepe r bur ning.

Neve r use b utte r, o ils o r oin tmen t to c over the b urn. T hey m ay re tain the h eat.

3) Keep the scalded person warm; Pl ace a blan ket a roun d the perso n.

4) Seek Medical Advice; Cal l you r med ical advi ce ho tlin e and desc ribe the s cald,

foll ow the ir di rect ions .

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FF Models

G E N E R A L C O N T R O L L E R I N F O R M A T I O N

REMOTE CONTROLLERS IDENTIFICATION

MC-91-1US (comes with the unit)

MC-100V-1US (optional)

BC-100V-1US (optional)

The c ontro ller (s) f or th e Rin nai Wate r Hea ter a llow the c usto mer t o con trol the f unct ions of th e

wate r heat er an d to d iagn ose c erta in fa ult c ondi tion s

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FF Models

R E M O T E C O N T R O L L E R O P E R A T I O N

DIAGNOSTIC USE OF CONTROLLER

1.

main tenan ce co des, pres s ‘On /Off ’ f ollo wed b y the

2.

for 2 secon ds an d sim ulta neou sly p ress ‘On/ Off’ but ton.

3.

Rinnai America

To Display Maintenance Codes: Pr ess ‘ On/O ff’ butt on. To se quen ce th roug h sto red

ther mosta t but ton.

To Display Water Flow through water heater: Pr ess the rmos tat b utto n, ho ld

To display Outlet Water Temperature: Pres s

12

FF Models

Digital Monitor

Indicates the selected water
temperature. Error messages flash
in the event of a failure.

ON/OFF

Used to switch the water heater on
and off.

Priority

Pressing takes control of the water
temperature by this controller only
when all taps are open.

Function

Enables the user to set the clock
and sound volume functions.

Thermostat

Increases or decreases the desired
water temperature.

In Use Indicator

Indicates that a hot water tap is open
and that control of the temperature is
taken at another controller.

Water Temperature Indicator

Indicates the selected hot water
temperature.

Clock

12 Hour AM / PM clock. In the event
of a fault, codes for error messages
will flash here.

Call

Allows user to contact another
controller. Can be used as a
communication channel for errands
or in emergency situations.

In Use Indicator

Indicates that a hot water tap is open and that control

of the temperature is taken at another controller.

Priority

Pressing takes control of the water

temperature by this controller only

when all taps are off.

Call

Allows user to contact another

controller. Can be used as a

communication channel for errands

or in emergency situations.

Clock

12 Hour AM / PM clock. In the event

of a fault, codes for error messages

will flash here.

Thermostat

Increases or decreases the desired

water temperature.

Sound Volume

Used to select the voice prompt

volume.

Water Smart / Bath Fill Indicator

Used to select Water Smart / Bath Fill Function.

ON/OFF

Used to switch the water heater on

and off.

Water Smart / Bath Fill

Used to select Water Smart / Bath

Fill Function.

Power Save

Indicates that the remote is in the

energy saving mode.

Water Volume

Used to select Water Smart / Bath

Fill volumes.

D E L U X E C O N T R O L L E R

ABOUT THE DELUXE CONTROLLER (MC-100V-1US)

NOTE: With power interruption, water heater will automatically default to the ON position to

provide hot water.

A B O U T T H E TH E D E L U X E B AT H R O O M CO N T R O L L E R (B C - 1 0 0 V- 1 U S )

Rinnai America

D E L U X E B A T H R O O M C O N T R O L L E R

13

FF Models

HOTHOT

COLDCOLD

ON!ON!

D E L U X E B A T H R O O M C O N T R O L L E R

Setting the Sound Volume

The v oice p romp t sou nd vo lume for a ll De luxe

Cont rolle r(s) can b e set indi vidu ally. To do

this , pres s the ‘Sou nd Vol.’ but ton. T he de faul t

voic e prom pt so und v olum e is m ediu m, ea ch

subs equen t pre ss of the ‘ Soun d Vol.’ will cycle

thro ugh th e ava ilab le vo lume sett ings in th e

foll owing orde r: Hi gh Voice - Off Voice ( beep )

- Off So und ( no be ep) - Low Voice - Med ium

Voice.

Adjusting Temperature

Simp ly pre ss th e ‘Ho t wat er te mp.’ or

butt ons un til t he re quir ed te mper atur e is

disp layed on th e Dig ital Moni tor.

To Oper ate t he ho t wat er uni t, op en an y hot

wate r tap. This w ill a utom atic ally ligh t the

burner providing hot water. The red ame of the

wate r heat er ‘I n Use Indi cato r ’ will illum inat e

on th e Tempera ture Cont roll er.

Once the ho t wat er is runn ing, if th e set

temp eratu re is eith er to o hot or co ld, p ress the

‘hot water temp . or butt ons u ntil the

desi red te mper atur e is r each ed.

CHECK WATER TEMPERATURE BEFORE USE.

A parent should always check the temperature before a child is placed in contact

with hot water.

NOTE: Avoid getting water in the speaker as this may cause damage.

NOTE: TEMPERATURE CANNOT BE

ADJUSTED EXCEPT BETWEEN 98°F

AND 110°F WHEN ANY HOT WATER TAP

IS OPEN.

Rinnai America

15

FF Models

HOTHOT

COLDCOLD

ON!ON!

HOTHOT

COLD

ON!OFF!

COLD

aP

te

S

rellortn

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t

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d

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U1-

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U1-

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M

2

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U1-19-

CM+

SU1-19-C

M+S

U1-

19-C

M

3

S

U1-19

-

CM

+S

U1-

19-CM+SU1-19-C

M+

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U1-

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M

4

001

-CM +V001-CB

+

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U1-

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M

5 V

001

-

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001-C

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— — —

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led

o

m

04153103152102

1

51

1

01

1

80

1

60

1

401201

0

0

189

5810

61

0

51

0

41

5

31

0

31

5

21

0

21———

———

—————

REU-V2532FFU / REU-V2532FFUD

REU-V2520FFU / REU-V2520FFUD

REU-V2520FFUC / REU-V2520FFUCD

REU-V2532FFUC / REU-V2532FFUCD

(°F)

(°F)

(°F)

5

8106

1

05

1

04

1

53

1

03

1

52

1

02

1

5

1

1

0

1

1

8

0

1

60

1

40120

1

00189

A .xorpp

(°C)erutar

ep

m

et

58

17

66

06

75

45

25

94

64

34

241

4

04938373

erutarepmet

Water Smart / Bath Fill Temperature Table

water smart/

bath fill temperature

02181161141121101180160140120100189

Approx.

temperature

(°F)

(°C)

948

4

746

44

43

4

2414

04

938373

erutarepmet

C O N T R O L L E R S S E T P A T T E R N / T E M P E R A T U R E T A B L E S

Temper atur e con trol lers a llow s pre cise temp erat ure c ontr ol by the u ser. When used corr ectl y,

the hot water unit will deliver the selected temperature, even when the water ow is varied,

or mo re tha n one tap i s in u se. E ach Temp erat ure C ontr olle r can be in divi duall y pro gram med,

howe ver th e wat er he ater unit can o nly d eliv er on e set temp erat ure a t any time. The av aila ble

temp eratu res (OF) ar e as fo llow s:

Temperature Table by Models

Suggested temperatures are:

Kitchen 120OF, Shower 98OF - 110

O

F, Bath ll 102

These temperatures are suggestions only. You may nd higher or lower temperatures more comfort-

able. Maintaining lower temperatures helps save energy. To obtain water temperatures lower than

98OF, simply add cold water.

O

F - 114OF

Deluxe Controllers are an optional extra. ‘Controller’ and ‘Deluxe’ Controllers can be installed togeth-

er. Controllers allow temperature selection only. ‘Deluxe’ Controllers have temperature selection, bath

ll and clock functions.

Cont rolle rs al low t he wa ter t empe ratu re to be se t fro m the vari ous l ocat ions w here they are

inst alled . The t empe ratu re se lect ed wi ll be avai labl e to al l out lets . Bel ow ar e the comb inat ion o f

Cont rolle rs th at ar e offe red b y Rin nai:

Controllers Combination Pattern

**See c ontro ller man ual in con troll er carto n box for mor e infoma tion d etail .

Rinnai America

18

Water Smart / Bath

Fill tem perat ure cann ot

excee d 120 OF for the

follo wing com merci al

model s with no by-p ass:

REU-V 2520F FUC

REU-V 2520F FUCD.

FF Models

Error

02

03

10

11

12

Faulty

No burner operation during

freeze protection mode

Power interruption during

Bath fill (Water will not flow

when power returns).

Air Supply or Exhaust

Blockage

No Ignition

Flame Failure

Remedy

Service Call

Turn off all hot water taps. Press ON/OFF twice.

Ensure Rinnai approved venting materials are being used.

Check that nothing is blocking the flue inlet or exhaust.

Check all vent components for proper connections.

Ensure vent length is within limits.

Ensure condensation collar was installed correctly.

Verify dip switches are set properly.

Check fan for blockage.

Check that the gas is turned on at the water heater, gas meter, or cylinder.

Ensure gas type and pressure is correct.

Ensure gas line, meter, and/or regulator is sized properly.

Bleed all air from gas lines.

Verify dip switches are set properly.

Ensure appliance is properly grounded.

Disconnect all MSA controls.

Ensure igniter is operational.

Check igniter wiring harness for damage.

Check gas solenoid valves for open or short circuits.

Remove burner cover and ensure all burners are properly seated.

Remove burner plate and inspect burner surface for condensation or debris.

Check that the gas is turned on at the water heater and gas meter. Check for obstructions in the flue

outlet.

Ensure gas line, meter, and/or regulator is sized properly.

Ensure gas type and pressure is correct.

Bleed all air from gas lines.

Ensure proper Rinnai venting material was installed.

Ensure condensation collar was installed properly.

Ensure vent length is within limits.

Verify dip switches are set properly.

Ensure appliance is properly grounded.

Disconnect keypad.

Disconnect all MSA controls if installed.

Check power supply for loose connections.

Check power supply for proper voltage and voltage drops.

Ensure flame rod wire is connected.

Check flame rod for carbon build-up.

Disconnect and re-connect all wiring harnesses on unit and PC board.

Check all components for electrical short.

Check gas solenoid valves for open or short circuits.

Remove burner plate and inspect burner surface for condensation or debris.

E R R O R M E S S A G E S

The R innai Water H eate r has the a bilit y to c heck its o wn op erat ion c onti nuou sly. I f a fa ult

occurs, an Error Message will ash on the Digital Dispaly of the Remote Controller. This assists

with diagn osin g the faul t, an d may enab le yo u to o verc ome a prob lem w itho ut a se rvic e cal l.

Plea se ide ntif y the code disp laye d whe n inq uiri ng ab out s ervi ce.

Failure to remedy faults may result in severe burns, scalds, and/or

death.

Rinnai America

19

FF Models

Error

14

16

32

33

34

52

61

65

71

72

LC
(00)

No
code

Faulty

Thermal Fuse

Over Temperature Warning

Outgoing Water

Temperature Sensor Fault

Heat Exchanger Outgoing

Temperature Sensor Fault

Combustion Air Temperature

Sensor Fault

Modulating Solenoid Valve

Signal Abnormal

Combustion Fan Failure

Water Flow Servo Faulty

(Does not stop flow properly)

SV0, SV1, SV2, and SV3

Solenoid Valve Circuit Fault

Flame Sensing Device Fault

Scale Build-up in Heat

Exchanger (when checking

maintenance code history

“00” is substituted for “LC” )

Nothing happens when

water flow is activated.

Remedy

Check gas type of unit and ensure it matches gas type being used.

Check for restrictions in air flow around unit and vent terminal.

Check for low water flow in a circulating system causing short-cycling.

Ensure dip switches are set to the proper position.

Check for foreign materials in combustion chamber and/or exhaust piping.

Check heat exchanger for cracks and/or separations.

Check heat exchanger surface for hot spots which indicate blockage due to scale build up. Refer to

instructions in manual for flushing heat exchanger.

Measure resistance of safety circuit.

Ensure high fire and low fire manifold pressure is correct.

Check for improper conversion of product.

Check for restrictions in air flow around unit and vent terminal.

Check for low water flow in a circulating system causing short-cycling.

Check for foreign materials in combustion chamber and/or exhaust piping.

Check for clogged heat exchanger.

Check sensor wiring for damage.

Measure resistance of sensor.

Clean sensor of scale build up.

Replace sensor.

Check sensor wiring for damage.

Measure resistance of sensor.

Clean sensor of scale build up.

Replace sensor.

Check for restrictions in air flow around unit and vent terminal.

Check sensor wiring for damage.

Measure resistance of sensor.

Clean sensor of scale build up.

Ensure fan blade is tight on motor shaft and is in good condition.

Replace sensor.

Check modulating gas solenoid valve wiring harness for loose or damage terminals.

Measure resistance of valve coil.

Ensure fan will turn freely.

Check wiring harness to motor for damaged and/or loose connections.

Measure resistance of motor winding.

Water Flow Servo or wiring faulty. Check Water Flow Servo wiring harness connection.

Measure resistance of Water Flow Servo wiring.

If blank screen is present on remote control then the Water Flow Servo has shorted out. Unplug Water

Flow Servo. If remote lights up and unit starts operating then replace Water Flow Servo.

Check wiring harness to all solenoids for damage and/or loose connections.

Measure resistance of each solenoid valve coil.

Ensure flame rod is touching flame when unit fires.

Check all wiring to flame rod for damage.

Remove flame rod and check for carbon build-up; clean with sand paper.

Check inside burner chamber for any foreign material blocking flame at flame rod.

Measure micro amp output of sensor circuit with flame present.

Replace flame rod.

Flush heat exchanger. Refer to instructions in manual.

Replace heat exchanger.

Clean inlet water supply filter.

On new installations ensure hot and cold water lines are not reversed.

Check for bleed over. Isolate unit from building by turning off hot water line to building. Isolate the

circulating system if present. Open your pressure relief valve; if unit fires, there is bleed over in your

plumbing.

Ensure you have at least the minimum flow rate required to fire unit.

Ensure turbine spins freely.

Measure the resistance of the water flow control sensor.

Remote control does not light up but you have 12 VDC at the terminals for controls.

E R R O R M E S S A G E S

Rinnai America

20

FF Models

M A I N T E N A N C E & S E R V I C E I N F O R M A T I O N

Always turn off the electrical power supply, the manual gas valve and

the manual water control valve whenever servicing the unit.

The Rin nai Wat er Hea ter sh ould be chec ked by a Prope rly Tra ined

Technic ian o nce a year. A Pro perl y Trai ned R inna i Techni cian

shou ld per form any r epai rs th at ma y be n eces sary.

The f ollow ing i tems shou ld be chec ked e ach i nspe ctio n:

1) The area arou nd the Rinn ai un it sh ould be fr ee fr om co mbus tibl e mat eria ls

such as clo th, v eget atio n and buil ding mate rial s. (s ee pa ge 8)

2) Che ck bu rner s for p rese nce o f for eign debr is, i nsec ts or bugs . These item s

are n ot cov ered by th e uni t’s wa rran ty.

3) Remove and clean the inlet water lter.

Keep t he app lianc e area clear and fr ee fro m comb usti ble ma teria ls, ga solin e,

4)

and other ammable vapors and liquids.

5) Do not obstruct ow of combustion and ventilation air.

In the case of any fault or error message from the Rinnai Water Heater,

rst turn all hot water taps off. Wait for 5 seconds. Turn the hot water tap back

on. I f the e rror mess age s t il l re ma in s , cal l y ou r Ri nn ai A u th or i ze d Se rv ic e

Re pr e se nt at i ve o r Ri nn ai a t 8 00 -6 2 1- 94 19 .

Should overheating occur or the gas supply fail to shutoff, turn off th e man ual

gas c ontro l val ve to the a ppli ance .

DO NO T ATTEMPT TO SER VICE Y OUR R inna i YOUR SELF.

Call a Rinnai Authorized Service Technician or call your installer.

Rinnai America

21

FF Models

M A I N T E N A N C E & S E R V I C E I N F O R M A T I O N

MAINTENANCE SUGGESTIONS

This water heat er ha s bee n des igne d and cons truc ted

for a long p erfo rman ce li fe wh en in stal led a nd op erat ed

prop erly u nder norm al co ndit ions . Reg ular insp ecti ons,

as ou tline d in t his s ecti on, a re st rong ly re comm ende d

as a means of keeping your heater operating efciently.

Cons idera tion shou ld be give n to p erio dic m aint enan ce

of sc ale re mova l in a ppli cati ons w here the w ater

hard ness q uali ty is elev ated and t he wa ter h eate r

runs for ex tend ed pe riod s suc h as i n com merc ial

appl icati ons o r app lica tion s wit h cir cula ting loop s.

1. Cle ani ng

The w ater h eate r sho uld b e cle aned annu ally.

Keep the wa ter h eate r cle ar of dust and d ebri s

espe ciall y in a nd ar ound burn er.

Clea ning p roce dure s for the R inna i Water H eate r

are a s foll ows:

1) Turn o ff and disco nnec t ele ctri cal p ower. Al low

to co ol for one h our.

2) Rem ove t he Fr ont Pa nel b y rem ovin g scr ews.

See p arts b reak down on pa nels .

3) Use pres suri zed ai r to r emov e dus t fro m aro und

main burne r.

4) Use soft dry c loth t o wip e cab inet .

DO N OT D AMAG E O R D ISTORT ANY PARTS

OF H EATER.

DO N OT U SE WET CL OTH OR SPRAY

CLEA NER S ON BU RNE R.

2. Visual check of main burner ames.

The burner must ame evenly over the entire
surface when operating correctly. The ame must
burn with a clear, blue, stable ame. See the parts

brea kdown of th e bur ner f or th e loc atio n of v iew

port s. An y and all p arts remo ved f or in spec tion or

serv ice mu st be repl aced befo re op erat ing t he un it.

* VENT MAINTENANCE

* VE NT S YSTE M

Must be che cked annu ally for

bloc kage o r det erio rati on. S ee

vent insta llat ion i nstr ucti ons.

* MA INT ENAN CE- ELEC TRI C

MOTOR S

Moto rs are perm anen tly

lubr icate d and need no

lubri cati on. Ke ep fa n and m otor

free of dus t and dirt , cle an

annu ally.

The ame pattern should be as shown in the

foll owing Figu res.

Rinnai America

22

FF Models

TR O U B L E S H O O T IN G A N D C O M M O N Q U E S TI O N S

- I don't have any hot water when I open the tap!

Q

- Mak e sure ther e is g as, w ater and e lect rici ty to the R inna i Water H eate r

A

(the power is tu rned on an d the gas i s tur ned o n)

- When I was using the hot water, the water got cold!

Q

- If you adjusted the ow from the tap to lessen it, you may have gone below the minimum

A

ow required. The Rinnai Water Heater requires a minimum ow rate to operate (see
specication page for ow rate of your unit). If you mix the water with a tap and attempt

to ge t a tem pera ture well belo w the temp erat ure b eing cont roll ed by the u nit, i t may drop

the ow below the desired minimum ow rate. Decrease the temperature supplied by the
Rinnai Water Heater at the remote control or increase your total ow.

- White smoke comes out of the exhaust!

Q

- Dur ing co lder weat her w hen t he ex haus t tem pera ture is ho tter than the a ir, t he ex haus t

A

fume s cond ense prod ucin g whi te st eam.

- When I open a hot tap. I do not immediately get hot water!

Q

- Hot water must trav el th roug h you r plu mbin g fro m the Rinn ai Water Heat er to the f auce t.

A

The time period for hot water to reach your xture is determined by the amount of water in
your plumbing system between your water heater and the xture, water pressure, ow rate
of xture in use, etc.

- After I turn off the hot water tap, the fan on the Rinnai Water Heaters continues to run!

Q

- The fan is designed to be on for 65 seconds after the ow of water stops.This is to ensure

A

cons tant w ater temp erat ures duri ng ra pid s tart ing a nd st oppi ng, a s wel l as ex haus ting any

residual gas ue products from the unit.

F O R Y O U R S A F E T Y R E A D B E F O R E O P E R AT I N G

If you do not follow these instructions

exactly, a fire or explosion may result causing property

damage, personal injury or loss of life.

A. This appliance does not have a pilot. It is

equipped with a direct ignition device which

automatically lights the burner. Do no t try to

ligh t the b urne r by h and.

B. BEFORE OPERATING: Smell all around the

appliance area for gas. Be sure to smell next

to the oor because some gas is heavier
than air and will settle on the oor.

WHAT TO DO IF YOU SMELL GAS

Do no t try t o lig ht an y app lian ce.

•

Do not t ouch any e lect ric s witc h, do not

•

use a ny pho ne in your buil ding .

Im medi atel y cal l you r gas supp lier from a

•

neig hbor ’s p hone . Fol low t he gas supp lier ’s

inst ructi ons.

If yo u cann ot re ach y our g as su ppli er, call

•

the re department.

C. Use o nly you r hand to oper ate re mote co ntrol

keyp ad. Ne ver u se to ols. If th e rem ote

keyp ad doe sn’t work , do n ot tr y to r epai r

it, call a qualied service technician. Force
or attempted repair may result in a re or

expl osion .

D. Do not us e thi s app lian ce if any p art h as

been under wate r. I mmed iate ly ca ll a

qualied service technician to inspect the

appl iance and t o rep lace any p art o f the

cont rol sy stem and a ny ga s con trol whic h

has b een un der w ater.

Rinnai America

23

FF Models

O P E R A T I N G I N S T R U C T I O N S

1) STOP! R ead t he sa fety info rmat ion a bove

befo re pro ceed ing.

2) Set t he the rmos tat t o low est s etti ng.3 )

Turn off all electric power to the appliance.

4) This appliance does not have a pilot. It is

equipped with a direct ignition device which

automatically lights the burner. Do no t try to

ligh t the b urne r by h and.

5) Turn the manu al va lve l ocat ed at gas

inle t of th e app lian ce cl ockw ise

inle t of ap plia nce c ount ercl ockw ise

to “O N”.

8) Turn on a ll el ectr ic po wer t o the

appl iance .

9) Set t hermo stat to de sire d set ting .

10) If the a ppli ance will not o pera te,

Foll ow the inst ruct ions “To Turn Off

Gas To Ap plia nce” and c all y our

serv ice te chni cian or ga s sup plie r.

Close d manual v alve

ß

(“OFF ” positi on)

Open Man ual valv e

(“ON” p ositi on)

To Turn Off Gas To A ppl ian ce

1) Se t the t herm osta t to l owes t set ting .

2) Turn o ff all elect ric p ower to th e app lian ce if serv ice i s to b e per form ed.

®

3) Turn t he ma nual valv e at g as in let of appl ianc e clo ckwi se

to “O FF”

Rinnai America

24

FF Models

Installer’s Instructions

This section is for the Qualified Installer
only. If you are not properly trained,
you should not install this unit. The
warranty may be voided due to installation

by a non-qualied installer. For information

on Rinnai Training Courses, call
1-800-621-9419.

Warnings .. .... ..... ..... ..... ..... ..... ..... ..... .... ..... ..... ..... ..... . 26, 27

Locat ing the Vent Termin al ..... ..... .... ..... ..... ..... ..... ..... .... 28

Perfo rmanc e Data ... ..... ..... ..... ..... ..... ..... ..... .... ..... ..... ..... 2 9

Dimen sions ..... ..... .... ..... ..... ..... ..... ..... ..... ..... .... ..... ..... .... 30

Recom mende d Piping f or Inst allat ion . ..... ..... . 31,32 ,33,3 4

Venting ..... ..... .... ..... ..... ..... ..... ..... ..... ..... ..... .... ..... ..... . 35,3 6

Contents

of Installer’s

Manual

Freez e Protec tion ..... ..... ..... ..... ..... .... ..... ..... ..... ..... ..... ... 37

Gas Pipi ng Sizin g Chart ..... ..... ..... ..... .... ..... ..... ..... ..... ... 38

Gas Pipi ng Notes ........ ..... ..... .... ..... ..... ..... ..... ..... ..... ..... 3 9

Water Pipin g Notes. ..... ..... ..... .... ..... ..... ..... ..... ..... ..... ..... 4 0

Press ure Reli ef Valve . ..... ..... ..... ..... ..... .... ..... ..... ..... ..... . 40

Light ing the Uni t .......... ..... ..... ..... .... ..... ..... ..... ..... ..... ..... 4 1

Remot e Contro llers .. ..... ..... ..... ..... ..... ..... .... ..... ..... ..... .... 42

Remot e Contro llers I nstal lati on ..... ..... .... ..... ..... ..... .. 43 ,44

Testin g ....... ..... ..... .... ..... ..... ..... ..... ..... ..... ..... .... ..... ..... .... 45

Schem atic Dia gram .. ..... ..... ..... ..... .... ..... ..... ..... ..... ... 4 6,47

Rinnai America

www.rinnai.us

800-621-9419

25

FF Models

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

-Warnings- (Residential Unit)

This manual must be followed exactly.

1) Re ad the safe ty is sues comp lete ly be fore inst alli ng th e Rin nai Wate r Hea ter.

2) This wate r hea ter i s sui tabl e for resi dent ial w ater (pota ble) heat ing O NLY.

DO NO T use th is wa ter h eate r for spac e hea ting , com bina tion s pace heat ing/

dome stic w ater heat ing, or co mmer cial wate r hea ting appl icat ions .

3) The Rinn ai Water Heat er is not s uita ble f or use in po ol or spa a ppli cati ons.

4) Thi s uni t is d esign ed to be in stal led i ndoo rs us ing t he pr oper vent pipi ng to

exha ust by -pro duct s of c ombu stio n to t he ou tsid e env iron ment . Con tact your

deal er or R inna i for prop er ve nt ki ts. DO NOT oper ate t his u nit wi thou t ven t

pipi ng con nect ed. E xhau st ga sses must be ex pell ed ou tsid e the home .

5) Mai ntai n pro per sp ace a roun d the unit for p rope r ser vici ng an d ope rati on.

Mini mum cl eara nces from comb usti ble m ater ials are l iste d bel ow.

To p of H eate r 6 inch es

Back of Hea ter 0 inch

Fron t of He ater 6 inch es

Side s of He ater 2 inc hes

Floo r 12 inc hes

Vent/Air Inta ke 0 i nche s

6) Ins tall er mu st ins tall a Pre ssur e rel ief v alve . Pip e pre ssur e rel ief d isch arge to a

drai n or ou tsid e env iron ment (See pres sure reli ef va lve s ecti on).

7) Th e appl ianc e sho uld b e loc ated in an area wher e lea kage of th e uni t or

conn ectio ns wi ll no t res ult i n dam age t o the area adja cent to th e app lian ce or

to lower oors of the structure. When such locations cannot be avoided, it is

reco mmend ed th at a s uita ble d rain pan, adeq uate ly dr aine d, be inst alle d unde r

the appliance. The pan must not restrict combustion air ow.

Rinnai America

26

FF Models

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

-Warnings- (Commercial Unit)

This manual must be followed exactly.

1) Re ad the safe ty is sues comp lete ly be fore inst alli ng th e Rin nai Wate r Hea ter.

2) This wate r hea ter i s sui tabl e for wate r (po tabl e) he ating or sp ace h eati ng.

- The pi ping and c ompo nent s con nect ed to the R innai Water H eate r mus t app roved

for u se in p orta ble w ater syst ems.

- To xic c hemi cals s uch a s tho se us ed fo r boi ler w ater trea tmen t are NOT to b e

intr oduce d to t he po rtab le wa ter u sed f or sp ace h eati ng.

- The Ri nnai Water He ater, if i t wil l be u sed a s a po tabl e wat er so urce , mus t not be

conn ected to a s yste m tha t was prev ious ly us ed wi th a n onpo tabl e

wate r heat ing a ppli ance .

- When t he sy stem requ ires wate r for spac e hea ting a t tem pera ture s hig her

than requi red f or ot her u ses, a mea ns su ch as mixi ng va lve s hall be in stal led to

temp er the wate r for othe r use s in o rder to re duce the s cald haza rd po tent ial.

3) Th e Rinn ai Wate r Hea ter i s not suita ble f or us e in p ool o r spa appl icat ions

4) Thi s uni t is d esign ed to be in stal led i ndoo rs us ing t he pr oper vent pipi ng to

exha ust by -pro duct s of c ombu stio n to t he ou tsid e env iron ment . Con tact your

deal er or R inna i for prop er ve nt ki ts. DO NOT oper ate t his u nit wi thou t ven t pip ing

conn ected . Exh aust gass es mu st be expe lled outs ide t he ho me.

5) Mai ntai n pro per sp ace a roun d the unit for p rope r ser vici ng an d ope rati on.

Mini mum cl eara nces from comb usti ble m ater ials are l iste d bel ow.

6) Ins tall er mu st ins tall a Pre ssur e rel ief

Top of H eate r 6 inches

valv e. Pip e pre ssur e rel ief d isch arge

Back of He ater 0 inc h

to a d rain o r out side envi ronm ent ( See

Fron t of H eate r 6 inche s

pres sure r elie f val ve se ctio n).

Side s of H eate r 2 inc hes

Floo r 12 inches

Vent/Air Inta ke 0 inc hes

7) Th e appl ianc e sho uld b e loc ated in an area wher e lea kage of th e uni t or

conn ectio ns wi ll no t res ult i n dam age t o the area adja cent to th e app lian ce or

to lower oors of the structure. When such locations cannot be avoided, it is

reco mmend ed th at a s uita ble d rain pan, adeq uate ly dr aine d, be inst alle d unde r

the a pplia nce.

Rinnai America

27

FF Models

0.0

0.5

0.

01

0

.51

0.02

0.52

0.03

9

8

7

6

5

4

32

10

)

m

pg( wolF reta

W

Pressure Loss (psi)

0.0

0.01

0

.02

0

.0

3

0

.04

0

.05

0

.06

Pressure Loss (ft head)

V2532FFU/FFUC

V2532FFUD/FFUCD

V2520FFU/FFUC

V2520FFUD/FFUCD

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3/4" Hot Water Supply Line

Rinnai

Water Heater

Rinnai

Equipment List

(Residential and

Commercial)

Rinnai
Water Heaters
(Indoor)

MC-91 Controller
(Included)

MC-100V a

103 International Drive
Peachtree City, Georgia 30269

RINNAI WATER HEATERS

Domes

tic Hot Water - Circulation Systems

1 Rinnai

Water Heater with Electric Storage Tank

This is not an engineered drawing, it is intended only as a guide and
no

t as a replacement for professionally engineered project drawings.
This drawing is not intended to describe a complete system, it is up
to the contractor/engineer to determine the necessary components
for and configuration of the particular system being installed. The
drawing does not imply compliance with local building code
requirements. It is the engineer/contractor responsiblity to ensure
the installation is in accordance with all local building codes. Confer
with

local building officials before installation.

Pressure Relief Valve

3/4" Ball Valve

3/4" Union

Check Valve

S

Pressure Regulator

Cir

culating Pump

Solenoid Valve

Boiler Drain Valve

KEY

Minimum 3/4" Cold Water Supply Line

2-5 Gallon

Electric Water

Heate

r

120°F

Building

Fixtures

Building Return (Not required to be 3/4" Line)

Build

ing Supply

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QTY

1

1

1

Rinnai

Water Heater

Pump Should be Controlled by an
Aquastat, Timer or Combination
Aquastat and Timer. Pump to be sized
for Pressure Drop through Building
Supply and Return Piping. Pump to be

of Bronze or Stainless Construction.

Notes:

PLEASE NOTE FOR RESIDENTIAL

APPLICATIONS, THIS PIPING

ARRANGEMENT

MAINTAINS FULL

WARRANTY

:

10 Years On Heat Exchanger
5 Years On Parts

Commercial

Application Warranty:

5 Years On Heat Exchanger
5 Years On Parts

Rinnai

Equipment List

(Residential and

Commercial)

Rinnai
Water Heaters
(Indoor)

MC-91 Controller
(Included)

MC-100V and BC-100V
Controllers Optional

RIK-KIT (Optional)
(3/4" Fittings Include:
2 Unions, 2 Ball Valves,
2 Drain Valves and
1 Pressure Relief Valve.)

3

/

4

"

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Important:

Install building return
line to the hot supply as close as
possible to the Rinnai Water
Heater.

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I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

RECOMMENDED PIPING FOR CIRCULATION SYSTEMS

Rinnai America

32

FF Models

103 International Drive
Peachtree City, Georgia 30269

RINNAI WATER HEATERS

Domestic Hot Water with Circulation

1 Rinnai Water Heater

This is not an engineered drawing, it is intended only as a guide and
no

t as a replacement for professionally engineered project drawings.
This drawing is not intended to describe a complete system, it is up
to the contractor/engineer to determine the necessary components
for and configuration of the particular system being installed. The
drawing does not imply compliance with local building code
requirements. It is the engineer/contractor responsiblity to ensure
the installation is in accordance with all local building codes. Confer
with

local building officials before installation.

Pressure Relief Valve

3/4" Ball Valve

3/4" Union

Check Valve

S

Pressure Regulator

Circulating Pump

Solenoid Valve

Boiler Drain Valve

KEY

Minimum 3/4" Hot Water

Supply Line

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ild

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O

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tle

t

s

(Optional)
2-6 Gallon
Storage Tank

(To eliminate cold water
sandwich effect caused by
frequent On/Off operation)

Pump Should be Controlled by an

Aquastat, Timer or Combination

Aquastat and Timer

Pump to be sized for 3.0 gpm flow @ 12 feet head. Flow Balancing
Valve to be adjusted to 3 GPM flow through water heater with no hot
water taps open. Pump to be of Bronze or Stainless Construction.

Cold Water Supply and Circulation Return Lines Must Be 3/4"
Tubing Throughout Circulation Loop.

Note:

Water heater outlet temperature
cannot be adjusted when
circulation pump is running.

QTY

1

1

1

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Rinnai

Water Heater

Note:

PLEASE NOTE FOR RESIDENTIAL

APPLICATIONS, THIS PIPING

ARRANGEMENT REDUCES

WARRANTY TO THE FOLLOWING:

3 Years On Heat Exchanger
3 Years On Parts

Rinnai

Equipment List

(Residential and

Commercial)

Rinnai
Water Heaters
(Indoor)

MC-91 Controller
(Included)

MC-100V and BC-100V
Controllers Optional

RIK-KIT (Optional)
(3/4" Fittings Include:
2 Unions, 2 Ball Valves,
2 Drain Valves and
1 Pressure Relief Valve.)

3

/

4

"

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Commercial Application Warranty:

5 Years On Heat Exchanger
5 Years On Parts

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Commercial)

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

OPTIONAL PIPING FOR CIRCULATION SYSTEMS

Rinnai America

33

FF Models

Rinnai

Water Heater

103 International Drive
Peachtree City, Georgia 30269

RINNAI WATER HEATERS

Domestic Hot Water - Scale Flush Procedure

1 Rinnai Water Heater

This is not an engineered drawing, it is intended only as a guide and
not as a replacement for professionally engineered project drawings.
This drawing is not intended to describe a complete system, it is up
to the contractor/engineer to determine the necessary components
for and configuration of the particular system being installed. The
drawing does not imply compliance with local building code
requirements. It is the engineer/contractor responsiblity to ensure
the installation is in accordance with all local building codes. Confer
with local building officials before installation.

Pressure Relief Valve

3/4" Ball Valv

e

3/4" Union

Check Valve

S

Pressure Regulator

Circulating Pump

Solenoid Valve

Boiler Drain Valve

KEY

G

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RINNAI Water Heater Flush Procedure

1. Disconnect power to the Rinnai Water Heaters.

2. Close valves V3 and V4.

3. Connect pump outlet hose H1 to service valve V2.

4. Connect drain hose H3 to valve V1.

5. Pour approximately 4 gallons of virgin, food grade,
white vinegar (or virgin, food grade, citric acid) into pail.

6. Place free ends of hose H2 and H3 into pail.

7. Open valves V1 and V2.

8. Turn on power to circulating pump and allow solution
to circulate through water heater for 45 minutes.

9. Turn off power to circulating pump.

10. Remove free end of hose H3 from pail.

11. Close valve V2 and open valve V4, only.

Do NOT open valve V3 at this time.

12. Allow water to flow out of hose H3 for 5 minutes,

rinsing cleaning solution from water heater.

13. Close valve V1 and open valve V3.

14. Disconnect hoses H1 and H3 from service valves.

15

. Remove in-line filter from water heater cold water inlet

and clean out any residue. Place filter back into unit.

16. Restore power to water heater.

V1

V3

V2

V4

H1

H2

H3

Circulating Pump

5 gallon pail of virgin, food
grade, white vinegar (or virgin,

food grade, citric acid).

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I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

RECOMMENDED SCALE FLUSH PROCEDURE

Rinnai America

34

FF Models

Hori zontal Venting with a

Condensate Collector

Hori zontal Venting without a

Condensate Collector

Condensate

Trap

Vertical Venting

(cond ensat e collect or requir ed)

Maximum Height

5 feet

3 in

min

3 in

min

3 in

min

Region s of co ld cli mate w ill cr eate

more con densa te in the ven t

system . A conden sate collector is

recomm ended i n cold cli mates .

If mor e tha n one elbow is used

in the vertica l sect ion y ou mus t

use a c onden sate c ollec tor.

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Venting

Condensate

Cond ensat e for mati on ca n occ ur in Cate gory III d irec t ven t app lian ces.

Vertical term inati ons m ust i ncor pora te a c onde nsat e dra in an d tra p as c lose as po ssibl e to

•

the a pplia nce.

T he co nden sate trap must cont ain a mini mum of 3" of wate r.

•

Disp ose of cond ensa te pe r loc al co des.

•

Slop e hori zont al ve ntin g 1/4 inch per f oot e ithe r tow ards the h eate r wit h a con dens ate

•

coll ector or to ward s the exha ust t ermi nal.

NOTE: Provisions must be made to prevent the condensate from entering the water heater.

Without proper drainage or disposal condensate will damage the heat exchanger.

Rinnai America

35

FF Models

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Two 45 elbows are considered equivalent to one 90° elbow.

Include termination elbows when using this table.

(1) If the length is less than 22' then move dip switch no. 1 (SW 1) to ON

(2) If the length is less than 16' then move dip switch no. 1 (SW 1) to ON

(3) If the length is less than 10' then move dip switch no. 1 (SW 1) to ON

Number of 90° Elbows

3

23

4

17

5

11

6

5

2

29 (3)

1

35 (2)

0

41 (1)

Venting

Air Intake and Exhaust Vent Pipe Length

Dete rmine the n umbe r of e lbow s in t he ve nt sy stem . The c orres pond ing n umbe r fro m the tabl e

indi cates the m axim um le ngth of ve nt pi pe.

For h igh al titu de in stal lati ons c onta ct Ri nnai at 1- 800- 621- 9419 .

Table 1 Maximum Vent Length (feet)

If it is necessary to adjust the dip switch, ensure that no other dip switches are

changed. Unauthorized adjustments can cause property damage, personal

injury, scalding, or death.

Intake/Exhaust Guidelines

T his w ater heat er is a dir ect v ent w ater heate r and ther efor e is c erti fied and l iste d wit h the

•

vent syste m. The only vent /air inta ke sy stem list ed fo r use w ith t his a ppli ance is th e Rin nai /

Ubbi nk ven t sys tem o r the Heat -Fab Saf- T Vent SC sy stem .

Mini mum wa ll th ickn ess i s 4”. Maxi mum w all t hick ness is 20 ”.

•

Do no t comb ine v ent c ompo nent s fro m diff eren t man ufac turer s.

•

T he ve nt sy stem must vent dire ctly to th e outs ide o f the buil ding and u se ou tsid e air for

•

comb ustio n.

Befo re ins tall atio n, in spec t eac h ven t com pone nt fo r dam age a nd co rrec t seal plac emen t. Do

•

not a ttemp t to f ix or inst all a ny da mage d ven t com pone nts.

Ever y vent conn ecti on mu st be acce ssib le fo r ins pect ion, clea ning , and repla ceme nt.

•

Avoid dips or sa gs in hori zont al ve nt ru ns by inst allin g sup port s per the v ent m anuf actu rers ’

•

inst ructi ons.

Supp ort ho rizo ntal air i ntak e run s eve ry fo ur fe et an d all vert ical air i ntake runs ever y six

•

feet or in a ccor danc e wit h loc al co des.

Venting s houl d be as dire ct as poss ible with a min imum numb er of pipe fitt ings .

•

Vent diam eter must n ot be redu ced.

•

Do no t conn ect t he ve ntin g sys tem w ith a n exi stin g ven t or c himn ey.

•

Do no t comm on ve nt wi th th e ven t pip e of a ny ot her w ater heat er or appl ianc e.

•

Vent conn ecti ons mu st be firm ly pr esse d tog ethe r so t hat t he ga sket s for m an a ir ti ght se al.

•

Refe r to th e ven t pip e man ufac ture rs’ inst ruct ions for c ompo nent asse mbly inst ruct ions .

•

T he fi rst v ent c ompo nent to th e app lian ce mus t be a n app lian ce ad apte r. Th is wi ll pr event

•

addi tiona l com pone nts f rom b eing inst alle d bac kwar ds.

Rinnai America

36

FF Models

Filter

Drain

Gas

Valve

GasColdHot

Turn Water Off

Turn Gas Off

Drain Water

Valve

Water

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Free ze Pro tect ion

If th e Rinn ai wa ter h eate r is d isco nnec ted f rom

eith er the elec tric al su pply or ga s sup ply, or if

ther e is an erro r tha t pre vent s the wate r hea ter f rom

func tioni ng no rmal ly, t here is NO FREE ZE

PROT ECTIO N. Fr eeze prot ecti on of the w ater

heat er is o nly p ossi ble w hen e lect rici ty, g as

supp ly and norm al wa ter h eate r fun ctio ns ar e

enab led. I f you expe ct fr eezi ng co ndit ions whil e

eith er ele ctri city or ga s sup ply i s int erru pted ,

wate r must be co mple tely drai ned f rom w ater

heat er.

This water heat er an d ven ting syst em is

desi gned t o wit hsta nd te mper atur es to as

low a s -30OF, so lo ng as elec tric ity a nd ga s

are s uppli ed to the p rodu ct an d nor mal

wate r heat er fu ncti ons a re en able d. If eith er

gas o r elec tric ity i s int erru pted NO FR EEZE

PROT ECTIO N is a vail able .

The i nstal lati on of auto drai n dow n sol enoi d val ves i s opt iona l. Ho weve r, Ri nnai stro ngly

reco mmend s tha t the se va lves be in stal led t o pre vent dama ge fr om fr eezi ng in c ase t he no rmal

free ze pro tect ion s houl d bec ome d isab led. If th e val ves a re no t ins tall ed the n any prod uct

dama ge due to fr eezi ng wi ll no t be c over ed by the w arra nty.

NOTE: Rinnai is continually updating and improving products, therefore, specications are subject

to change without prior notice. Local, state, provincial and federal codes must be adhered to prior

to installation.

Climate conditions can dictate special applications. Please refer to local codes before installing

product.

Rinnai America

37

FF Models

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Gas Piping Sizing Chart

Capacity Table for Natural Gas

cubic feet / hour

(table assumes .3 inch pressure drop, specic gravity of .60)

Nominal Length of Pipe in Feet

Iron Pipe

Size

Inches

10 20 30 4 0 50 60 70 8 0 90 100 125 150 1 75 200

278 1 90 152 130 115 105 9 6 90 84 79 72 64 59 55

3/4

1 520 3 50 285 245 215 195 180 17 0 160 15 0 130 120 110 100

1-1/ 4 1050 730 590 50 0 44 0 40 0 37 0 350 320 305 2 75 250 225 2 10

1600 1100 890 7 60 6 70 6 10 5 60 530 4 90 4 60 410 380 350 32 0

1-1/ 2

Afte r dete rmin ing t he le ngth of pi pe re quir ed se lect the p ipe s ize t hat w ill su pply the

cubi c feet per h our o f gas requ ired for t he in put r atin g of t he Ri nnai Water He ater s.

The formula for guring the cubic feet per hour required is:

Gas I nput of Ri nnai wate r hea ter (B TU/H R)

CFH =

3

Heat ing Value of Gas( BTU/ FT

)

*Gas input requ irem ent i s on t he wa ter h eate r dat a pla te

*The heati ng va lue o f the gas c an be obta ined from the l ocal Natu ral G as Ut ility

Capa city Tabl e for LP Gas

BTUH of undiluted liquied petroleum gases

(tab le ass umes 11 in ches of wa ter c olum n pre ssure at th e inl et, . 5 inc h dro p)

Nominal Length of Pipe in Feet

Iron Pipe

Size

Inches

10 20 30 40 5 0 60 70 80 90 100 12 5 150

275 189 152 12 9

1/2

3/4 56 7 393 315 267 237 21 7 196 1 85 1 73 162 146

1 1071 732 5 90 504 448 40 9 378 3 46 322 3 07 275 252

2205 14 96 1 212 10 39 913 83 4 771 724 677 630 567 511

1-1/ 4

Rinnai America

38

FF Models

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Gas Piping Notes

1) A m anua l gas c ontr ol va lve m ust b e pla ced u pon t he ga s sup ply l ine t o the Rinn ai Water

Heat er. A uni on ca n be u sed o n the conn ecti on ab ove t he sh ut off v alve for t he fu ture

serv icing or di scon nect ion o f the unit .

2) Che ck th e typ e of ga s and the g as in let p ress ure b efor e con nect ing t he Ri nnai Water

Heat er if t he Ri nnai Water H eate r is no t of t he ga s typ e tha t the buil ding is su ppli ed wi th,

DO NO T conne ct th e wat er he ater. Con tact the d eale r for the p rope r unit to ma tch t he ga s

type .

3) Min imum and M aximu m Gas pres sure s are list ed be low:

* Min imum v alue is fo r inp ut ad just ment

Natural Gas: Minimu m 6" W C Propane Gas: M inim um 10 "WC

Maxi mum 10 .5" W C Maximum 1 3.5" WC

Conversion of this unit from natural gas to propane or propane to natural gas

CANNOT be done in the eld.

4) Aft er co mple tion o f gas pipe conn ecti ons, all j oint s inc ludi ng th e hea ter m ust b e chec ked

for g as-ti ghtn ess b y mea ns of leak dete ctor solu tion , soa p and wate r, or an eq uiva lent

nonammable solution, as applicable.

Since some leak test solutions, including soap and water, may cause corrosion

or stress cracking, the piping must be rinsed with water after testing, unless it

has been determined that the leak solution is non-corrosive.

5) The Rinn ai Water Heat er mu st be leak test ed bef ore i t is p lace d int o ope rati on.

6) The Rinn ai Water Heat er an d its indi vidu al shu t-off valv e mus t be d isco nnec ted f rom t he

gas s upply pipi ng sy stem when pres sure test ing o f the gas s uppl y pip ing s ystem at te st

pres sures grea ter t han 1 /2 ps i (3. 5 kPa ).

7) Alw ays u se ap prove d con nect ors t o con nect the u nit t o the gas l ine. Alw ays p urge t he ga s

line of any debr is be fore conn ecti on to the w ater heat er.

8) The Rinn ai Water Heat er mu st be isol ated from t he ga s sup ply p ipin g sys tem b y clo sing it's

indi vidua l man ual s huto ff val ve du ring any p ress ure t estin g of t he ga s sup ply p ipin g sys tem

at te st pre ssur es eq ual t o or l ess t han 1 /2 ps i (3. 5 kPa ).

9) The Rinn ai Water Heat er In stal lati on lo catio n mus t pro vide adeq uate Comb usti on an d

Ventilation airow.

Rinnai America

39

FF Models

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Water Piping Notes

1) A m anua l wat er co ntro l val ve mu st be plac ed up on th e wat er in let c onnec tion to th e Rin nai

Water He ater befo re it is co nnec ted to the w ater line . Uni ons m ay be used on bo th th e hot /

cold water supp ly li nes, for t he fu ture serv icin g or d isco nnec tion of th e unit .

2) Al l sold erin g mat eria ls an d pip ing m ust b e com pati ble w ith p otab le wa ter.

3) Pur ge th e wat er li ne to remo ve fr om it all d ebris and a ir. D ebri s wil l dam age t he Ri nnai

Water He ater s.

4) Th ere is a wir e mes h str aine r on t he Ri nnai Water He ater ’s i nlet to di scou rage the

intr oduct ion o f deb ris t o the unit . It w ill n eed t o be c lean ed pe riod ical ly. DO NOT o pera te

unit without lter in place. Clean this lter before leaving the job site.

DO NOT reverse the inlet and outle t (cold and hot water) connections on the

unit. This would cause the Rinnai Water Heater to operate dangerously or not

at all.

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Pressure Relief Valve

1) ANSI code calls for the addition of an approved pressure relief valve to all water heating systems.

The p ressu re re lief valv e mus t mee t the foll owin g cri teri a: The r elie f val ve mu st co mply with the

2)

stan dard f or Re lief Valves and Aut omat ic Ga s Shu toff De vice s for Hot Wate r Sup ply S yste ms A NSI

Z21. 22 and /or t he st anda rd CA N1-4 .4 Tempe ratu re, P ress ure, Temperatu re an d Pre ssur e Rel ief

Valv es an d Vacuum Re lief Val ves. T his r elie f val ve mu st be rate d up t o 150 PSI o f pres sure .

3) Th e reli ef va lve s houl d be a dded to th e hot wate r out let l ine p er ma nufa cture r's i nstr ucti ons.

DO NO T place any o ther type valv e or s hut o ff devi ce be twee n the reli ef va lve a nd th e hot

wate r heat er.

4) The discharge from the pressure relief valve should be piped to the ground or into a drain system to

prevent exposure or possible burn hazards to humans or other plant or animal life. Water discharged

from the relief valve could cause severe burns instantly, scalds and/or death.

5) Do not plug the relief valve and do not install any reducing ttings or other restrictions in the relief

line. The relief line should allow for complete drainage of the valve and the line.

6) If a reli ef va lve d isch arge s per iodi call y, thi s may be du e to t herm al ex pans ion i n a cl osed

wate r supp ly sy stem . Con tact the w ater supp lier or lo cal p lumb ing i nspe ctor o n how to

corr ect th is si tuat ion. Do no t plu g the reli ef va lve.

7) Pr essur e rel ief v alve must be ma nual ly op erat ed on ce a y ear t o che ck fo r corr ect o pera tion .

Caut ion: S ee It em 4 b efor e man uall y ope rati ng re lief valv e.

Shou ld ove rhea ting occu r or t he ga s sup ply f ail t o shu t off, t urn o ff the manu al ga s val ve on

8)

the R innai .

Rinnai America

40

FF Models

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Lighting the Unit

If you do not follow these instructions exactly, a re or explosion may

result causing property damage, personal injury or loss of life.

1) This water heat er do es no t hav e a pi lot. It is equi pped with a dir ect i gnit ion

devi ce whi ch au toma tica lly l ight s the burn er. DO NOT TRY TO LIG HT THE

BURN ER BY HA ND.

2) Befo re ope rati ng th e Rin nai Wat er Hea ter s mell all a roun d the unit for g as.

Be su re to s mell near the g roun d as l eaki ng ga s may sett le th ere.

3) Turn the manu al ga s con trol valv e on.

STOP!! READ THE SAFETY ISSUES ON PAGES 8

4) Turn on a ny ho t wat er ta p. The R inna i Water Heate r sho uld l ight and b egin

heat ing yo ur wa ter.

If t he Rinn ai Wa ter Hea ter fa ils to l igh t

1) DO NO T ATTEMPT TO LIGH T BY HAND .

2) Turn off t he el ectri cal p ower to th e uni t.

3) Turn off t he ma nual g as co ntro l.

Wait 5 minu tes, if yo u sme ll ga s, go to a ne ighb or's hous e and call the g as

4)

company or the re department. If you do not smell gas, go to the next step.

5) Turn the manu al ga s con trol valv e on.

6) Turn the elec tric al po wer t o the unit o n.

Turn on any hot w ater tap.

7)

8) If th e unit stil l fai ls to ligh t, tu rn off the e lect rici ty and gas t o the unit and c all

Rinn ai 1-8 00-6 21-9 419.

Rinnai America

41

FF Models

Bath Controller

Main Controller

Controller Connection in Parallel

RINNAI

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Remote Controllers- General

The r emote cont rols for t he Ri nnai Water He ater allo w the cust omer to co ntro l the

func tions of th e wat er he ater and t o dia gnos e cer tain faul t con diti ons.

Befo re ins tall ing t he re mote cont roll ers, dete rmin e the most conv enie nt loc atio n(s) .

When decid ing o n the best loca tion for t he re mote cont roll ers, cons ider the

foll owing item s:

1) Plac e the cont roll ers ou t of r each of sm all c hild ren.

2) Avoid loca tion s whe re th e con trol ler( s) wi ll be come hot ( over t he st ove, near

the o ven or a rad iant heat er).

3) Avoid direct sunlight (The digital display can be difcult to read in direct

sunl ight) .

4) Avoid area s whe re th e rem ote c ontr olle r can be sp lash ed wi th wat er, oil,

sauc e, etc .

5) The remo te con trol ler c able s car ry lo w vol tage , 12V DC di gita l.

NOTE: Controllers have to be wired in Parallel. Each Controller can

share the same feeder circuit wire.

Controllers cannot be wired in series.

When the Temperature Controller is used in public applications, it

should be installed where it can not be adjusted by the public (i.e. a

maintenance room or manager’s ofce).

NOTE: The Temperature Controller(s) have default temperature settings for the Rinnai

Water Models. See Controllers Set Pattern page for details.

Rinnai America

42

FF Models

Quick Cable

Connector

Cable Access

Hole

Terminals For Controls

Cable Screw

Clamp Screw

Clamp

R e m o t e C o n t r o l l e r s I n s t a l l a t i o n t o A p p l i a n c e

For models : V2520FFUD/FFUCD and V2532FFUD/FFUCD

7) Disc onnec t the powe r fro m the Rinn ai Water

Heat er.

8) R emov e a sc rew on the Q uick Cabl e Con nect or.

(Fig 1)

9) To acce ss Ca ble S crew s rot ate t he Qu ick C able

Conn ector 90° c ount er cl ock w ise. (Fig .2)

Fig.1

10) Ins ert w ire c able thro ugh t he Ca ble Acces s Hol e

so th at it c an be acce ssed from the b ack. (Fig .2)

11) Lo osen two C able Scre ws on the Term inal s For

Cont rols a nd co nnec t the cabl e acc ordi ngly. You

can n ot con nect more than two c able s at a time .

If mo re tha n two , ple ase c onne ct in para llel .

(Fig .3)

12) Loosen the Clamp Screw and afx wire cable

with clamp . Cla mp is in a c arto n box of Re mote

Cont rolle r.

Plea se mak e all owan ce fo r wir e to e limi nate

tens ion. ( Fig. 4)

13) Ins tall the Q uick Cabl e Con nect ion a s bef ore.

(Fig .5)

Fig.2

Fig.3

Fig.4

Rinnai America

44

Fig.5

FF Models

Model #

Model #

Inlet Gas Pressure Manifold Forced Low Fire Manifold Forced High Fire

Inlet Gas Pressur

e Manifold Forced Low Fire Manifold Forced High Fire

REU-V2520FFU Series

REU-V2520FFUD Series

REU-V2532FFU Series

REU-V2532FFUD Series

REU-V2520FFU Series

REU-V2520FFUD Series

REU-V2532FFU Series

REU-V2532FFUD Series

6" - 10.5" 0.77" 3.7"

6" - 10.5

" 0.77" 3.7"

10" - 13.5

" 0.93" 4.2"

10" - 13.5" 0.93" 4.2"

Propane Gas Inlet and Manifold Gas Pressure by Model

Natural Gas Inlet and Manifold Gas Pressure by Model

I N S T A L L E R ’ S I N S TA L L A T I O N I N S T R U C T I O N S

Testing

1) Turn on the g as an d wat er.

2) Che ck fo r wat er and gas l eaks . Use soap y wat er to test for g as le aks.

3) Rem ove p ress ure te st po int s crew, att ach p ress ure g auge to te st po int.

4) Turn Po wer o n.

5) Ope n any hot w ater t ap fu lly.

6) Che ck te st po int or supp ly pr essu re in wate r col umns per i nch.

NOTE: The pressure may be low due to too little ow, too high an incoming temperature,

and/or undersized gas piping. Examine these areas before determining that the

pressure needs to be adjusted. Contact Rinnai before adjusting manifold pressures at

1-800-621-9419. Failure to contact Rinnai, could void unit’s warranty.

7)

If it is determined that the gas pressure needs adjusting, rst check the incoming

pres sure a t the test poin t on t he ga s inl et. I f it i s cor rect foll ow th e adj ustin g

proc edure cont aine d in t he po uch o f the unit EXAC TLY.

The regulator is pre-set at the factory, it should not need resetting.

8) Turn th e hot w ater off. Turn the powe r off. R emov e the p ress ure gu age a nd rep lace

the t est po int s crew. Che ck fo r a ga s lea k aro und t he te st po int sc rew.

9) Repl ace t he fr ont c over.

10) Turn the powe r bac k on.

11) Che ck th e ope rati on of the u nit. Chec k the oper atio n of ea ch of the r emot e

cont rolle r(s) . Che ck th e ope rati on of the P ower fail ure p rote ctio n syst em.

12) Expla in th e pro per o pera tion of th e Rin nai Wate r Hea ters to th e cus tome r.

Rinnai America

45

FF Models

06 0 00 00 2 31 44 5 1

U245-3250X01(00)

Printed in Japan_06/03