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Rinnai R75LSI - page 1
— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of th is or any other appliance. — WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. • Do not touch any electrical s witch; do not use any phone in your building. • Immediately call y our gas supp lier from a neighbor’s phone. Follow the ...
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Rinnai R75LSI - page 2
2 VA Series Indoor LS Manual Specifications ......................................................3 Consumer Safety Information Safety Definitions .............................................4 Safety Behaviors and Practices .......................4 Safety Features ................................................4 Description of Operation ......... ...
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Rinnai R75LSI - page 3
VA Series Indoor LS Manual 3 S pecifications Rinnai is continually updating and imp roving products. T herefore, specifications ar e subject to change without prior notice. The maximum inlet gas pressure must not exceed the va lue specified by the manufacture r. The minimum value listed is for the purpose of input adjustment. Model R50LSi R75LSi R9 ...
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Rinnai R75LSI - page 4
4 VA Series Indoor LS Manual W ARNING Safety Behavior and Practices • Keep the area around the appliance clear and free from combustible materials, gasolin e, and other flammable vapors and liquids. • Do not use this appliance if any part has been unde r water. Immediately call a qualified service technician to inspect the applian ce and to rep ...
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Rinnai R75LSI - page 5
VA Series Indoor LS Manual 5 The Rinnai water heater is one of the most advanced water heaters available. It provides a continuous supply of hot water at a preset temperature. This appliance is direct vent where ai r is brought in from the outside and combustion gase s are exhausted to the outside. While electricity, water, and gas sup plies are co ...
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Rinnai R75LSI - page 6
6 VA Series Indoor LS Manual T emperature Controllers - Models Tem per atu re Dis pla y Thermosta t Priorit y Indicator Priority Button ON/OFF Button In Use Indi c at or Tem per atu re Dis pla y Thermostat In Use Indi c at or Priority Indi c at or Priority Button ON/OFF Button MC-91-1US & MCC-91-1US MC-502RC-1US-S * (Wireless) * Requires the tr ...
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Rinnai R75LSI - page 7
VA Series Indoor LS Manual 7 Temp erat ur e Dis pla y Thermosta t In Us e Indi c at or Priority B utton and I ndica t or ON/OFF Butto n Clock Cal l Function Tem per at ure Displ ay Thermostat ON/OFF Butto n In Us e Indi c at or Clock Call Priority Button an d Indic ator W at er Smar t Bath Fill In dicator Wate r Sma rt Bat h Fill Button Power Save ...
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Rinnai R75LSI - page 8
8 VA Series Indoor LS Manual Switc h No. F O F 8 5 7 6 4 3 ON 1 2 Switc h No. F O F 8 5 7 6 4 3 ON 1 2 120º F (49º C) 140º F (60º C) Setting the T emperature 1. Press the “Priority button” on the temperature controller. The green Priority light will glow indicating that this controller is controlling the temperature and that the Rinnai wate ...
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Rinnai R75LSI - page 9
VA Series Indoor LS Manual 9 T emperature Ranges This water heater will attempt to prov ide hot water at the temperature setti ng even when the water flow is varied or when more than 1 tap is in use. The water h eater c an deliver water at only one temperature setting at a time. The available temperatures for a given model a re provided below. Mode ...
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Rinnai R75LSI - page 10
10 VA Series Indoor LS Manual Setting the Water Volume 1. Press the “Priority button” on the temperature controller. The green Priority light will glow indicating that this controller is contro lling the temperature and that the Rinnai water heater is ready to supply hot water. 2. Press the “Temp” ▲ or ▼ buttons to obtain the desired te ...
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Rinnai R75LSI - page 11
VA Series Indoor LS Manual 11 Setting Controller to Mute To eliminate the beeps wh en keys are pressed or to turn the beeps back on, pre ss and hold both the ▲ and ▼ buttons until a beep is heard (approximately 5 secon ds). Models MC-91 and MCC-91 Filling the Tub 1. Press the “Water Smart / Bath Fill” button once. The button will illuminate ...
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Rinnai R75LSI - page 12
12 VA Series Indoor LS Manual W ARNING Turn off the electrical power sup ply, the manual gas valve and the manual water control valve whenever servicing the unit. Repairs and maintenance should be p erformed by a qualified service technician. The appliance should be inspected annually by a qualified service technicia n. Verify proper operation afte ...
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Rinnai R75LSI - page 13
VA Series Indoor LS Manual 13 Error Codes The Rinnai water heater has the ability to check its o wn op eration continuously. If a fault occurs, an error cod e will flash on the Display of the temperature controller. This assists with diagnosing the fault and may enable you to overcome a problem wit hout a service call. Please i dentify the code dis ...
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Rinnai R75LSI - page 14
14 VA Series Indoor LS Manual 14 Thermal Fuse Check gas type of unit and ensure it matches gas type being use d. Check for restrictions in air flow around unit and vent terminal. Check for low water flow in a circulating system causing sh ort-cycling. Ensure dip switches are set to the proper pos ition. Check for foreign materials in combustion ch ...
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Rinnai R75LSI - page 15
VA Series Indoor LS Manual 15 T rouble Shooting for Common Issues I don’t have any hot w ater when I open the tap. Make sure there is gas, water, and ele ctricity to the Rinnai water heater (powe r is turned on and the gas is turned on). When I was using the hot w ater, the water got cold. If you adjusted the flow from the tap to lessen it, you m ...
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Rinnai R75LSI - page 16
16 VA Series Indoor LS Manual Flushing the Heat Exchang er (Error Code: LC or 00) An “LC” or “00” error code indicates the unit is beginni ng to lime up and must be flushed. Failu re to flush the appliance will cause dam age to the heat exchanger. Dama ge caused by lime build-up is not covered by the unit’s warranty. After flushing, reset ...
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Rinnai R75LSI - page 17
VA Series Indoor LS Manual 17 Only properly trained and q ualified installers should install this appliance. The warranty may be voided due to improper installation or installation by a non- qualified installer. Rinnai highly recommends all installers a ttend a product knowledge cla ss. For information on a Rinnai Traini ng Course or for questions ...
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Rinnai R75LSI - page 18
18 VA Series Indoor LS Manual Clearances from Appliance 1. Identify the installati on location and confirm that the installation will meet all required clea rances. 2. Securely attach the water heater to the wall using any of the holes in the wall installation brackets which are at the top and bottom of the water heater. Ensure that the attachment ...
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Rinnai R75LSI - page 19
VA Series Indoor LS Manual 19 G a s P i p i n g General Instructions • A manual gas control valve must be placed in the gas supply line to the Rinnai water heat er. A union can be used on the connection ab ove the shut off valve for the future servicing or disconnection of the unit. • Check the type of gas and the gas inlet pressu re before con ...
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Rinnai R75LSI - page 20
20 VA Series Indoor LS Manual Pipe Sizing Procedure - Example 1. Determine the cubic feet per hour of ga s required by dividing the gas input (on the rating plate) by the heat ing value of the gas (available from the local gas compan y). The gas input needs to include all gas produ cts at the location and the maximum BTU usage at full load whe n al ...
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Rinnai R75LSI - page 21
VA Series Indoor LS Manual 21 The freeze protection features inclu de electrical heating elements and intermittent firing of the burner. Freeze protection may be disabled if ele ctricity or gas is not supplied, or if ther e is an error preventing the water heater from functioning. Loss of freeze protection may result in water damage from a burst he ...
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Rinnai R75LSI - page 22
22 VA Series Indoor LS Manual Pressure Relief Valve 3/4" Ball Valve 3/4" Un ion Check Valve S Pressure Regula tor Circulating Pump Solenoid Valve Boiler Drain Va lve KEY G a s S u p p l y M i n i m u m 3 / 4 " C o l d W a t e r S u p p l y L i n e Minimum 3/4" Hot Water Supply Lin e S 1/2" M inimum Normally Open Soleno id V ...
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Rinnai R75LSI - page 23
VA Series Indoor LS Manual 23 Recommended Piping for Basic Installation G a s S u p p l y 3 / 4 " C o l d W a t e r S u p p l y L i n e 3/4" Ho t Wat e r S u ppl y Li ne Rinnai Water Hea ter Rinna i Equipment Lis t Rinna i Wate r Heat ers RIK-KIT ( Optional) (3/ 4" F itt i ngs Inc l ud e: 2 Union s, 2 Ball Valv es, 2D r a i n V a l v ...
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Rinnai R75LSI - page 24
24 VA Series Indoor LS Manual Recommended Piping for Circulation Systems Pressure R elief Val ve 3/4" Ball Va lve 3/4" Union Check Valve S Pressure Regula tor Circu lating Pump Soleno id Valve Boiler Drain Va lve KEY Minimum 3/4" Cold Water Supply Line Electric Water Heate r Build ing Fixture s Buildi ng Supp ly E x p a n s i o n T a ...
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Rinnai R75LSI - page 25
VA Series Indoor LS Manual 25 Pressure Relief Valve 3/4" Ball Valve 3/4" Un ion Check Valve S Pressure Regula tor Circu lating Pump Soleno id Valve Boiler D rain Va lve KEY Minimum 3/4" H ot Water Supply Line B u i l d i n g F i x t u r e O u t l e t s (Opt ional ) 2-6 Gal lon St orag e Ta nk (To e limin ate co ld wa te r sandwich ef ...
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Rinnai R75LSI - page 26
26 VA Series Indoor LS Manual • Vertical terminations must incorporate a condensate drain and trap as close as possibl e to the appliance. • Slope any horizontal venting 1/4 inch per foot (19 mm / m), towards the heater if the condensate collector is used, or towards the exhau st terminal if the condensate collector is not used. • Dispose of ...
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Rinnai R75LSI - page 27
VA Series Indoor LS Manual 27 Example: If you have one elbow then your maximum vent l ength is 35 feet (10.7 m). If your actual length is greater than 15 ft (4.6 m) then move dip switch no. 1 (SW1) to OFF. Maximum Vent Length 1. Determine the number of 90 degree elb ows in the v ent system. (Two 45 degree elbows count as one 90 degree elbow. On the ...
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Rinnai R75LSI - page 28
28 VA Series Indoor LS Manual Vent Products Manufacturer Product Parts Rinnai/Ubbink Rolux Vent System Heat-Fab Saf-T Vent SC system Metal-Fab Corr/Guard V ent/Air Intake System Refer to the manufacturer’s technical literatu re for specific part numbers and instruction s. Listed and Tested Vent Products for R50LSi ..................... REU-VA 201 ...
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Rinnai R75LSI - page 29
VA Series Indoor LS Manual 29 Flue T e rminal Clearances ( ANS Z21.10.3 ● C S A 4 . 3 ) INS IDE CO RNER D E TA I L FIXED CLOSED OPERABLE FIXED CLOSED OPERABLE B B B A J B M C F B B E D L G A H K I 1 A vent shall not terminate directl y above a sidewalk or paved driveway that is loca ted between two single family dwellings and serves both dwelling ...
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Rinnai R75LSI - page 30
30 VA Series Indoor LS Manual 24" V Additional Clearances - V ent T erminal Local codes supersede the se clearances. • Avoid termination locations near a dryer vent. • Avoid termination locations near comm ercial cooking exhaust. • For VA3237 air intake position, follow the ANS Z21.10.3 ● CSA 4.3 requirem ents on the previous page. 60& ...
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Rinnai R75LSI - page 31
VA Series Indoor LS Manual 31 Flue Installation - Concentri c V enting (R50LSi , R75LSi , R85LSi) 3 in (75 mm) minimum Condensate Trap Vertical Termination (condensate collector must be used in all installations) 3 in (75 mm) minimum 3 in (75 mm) minimum Horizontal Termination using the Condensate Collector 3 in (75 mm) minimum Condensate Trap To a ...
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Rinnai R75LSI - page 32
32 VA Series Indoor LS Manual Air Intake Assembly The air intake system consists of a field supplied 4 inch diameter stainless steel, Schedule 40 PVC, ABS or CPVC pipe. A maximum 6 feet of semi-rigid flexible aluminum ducting can also b e used. Foil wrapped dryer vent and cell core p roducts are not authorized. The air intake has a zero cleara nce ...
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Rinnai R75LSI - page 33
VA Series Indoor LS Manual 33 Vertical Terminations The air intake requires a re turn bend or two 90º elbows to prevent e ntry of rain. SLOPE INTAKE AND EXHAUST TOWARD OUTSIDE TERMINATION MINIMUM 1/4" PER FOOT Horizontal with Concentric Termination Flue Installation (R98LSi , R98LSi-ASME) The vent termination and air intake must be in the sam ...
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Rinnai R75LSI - page 34
34 VA Series Indoor LS Manual High Altitude Installations 0-2000 ft (0-610 m) 2001-5200 ft (610-1585 m) 5201-7700 ft (1585-2347 m) 7701-10200 ft (2347-3109 m) Switch No. 2 OFF OFF ON ON Switch No. 3 OFF ON OFF ON Set dip switches 2 and 3 to the values shown in table below for your altitude. The default setting for the appliance is 0-2000 ft (0-610 ...
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Rinnai R75LSI - page 35
VA Series Indoor LS Manual 35 T emperature Controller Installation • The controller should be out of reach of small children. • Avoid locations where the controller may become hot (near the oven or radiant heater). • Avoid locations in direct sunlight. The digital display may be difficult to read in direct sunlight. • Avoid locations where ...
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Rinnai R75LSI - page 36
36 VA Series Indoor LS Manual T emperature Controller Installation 1. Determine a suitable location for the controller. 2. Make three holes in the wall as shown. 3. Run the cable between the controller and the Rinnai water heater or the controlle r and the other controller. 4. Remove the face plate from the temperature controller using a screwd riv ...
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Rinnai R75LSI - page 37
VA Series Indoor LS Manual 37 Operating Instructions FOR YOUR SAFETY READ BEFORE OPERA TING A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor ...
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Rinnai R75LSI - page 38
38 VA Series Indoor LS Manual 0. 0 1. 0 2. 0 3. 0 4. 0 5. 0 6. 0 7. 0 8. 0 9. 0 10.0 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 02 468 1 0 1 2 Wa t er Fl ow ( gpm ) P r essur e Loss ( psi) 0 10 20 30 40 50 60 70 80 90 100 Pr ess ur e Loss (f t head ) T echnical Dat a Pressure Drop Curve O u t l e t F l o w D a t a R98LSi R94LSi R75LSi R50LS ...
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Rinnai R75LSI - page 39
VA Series Indoor LS Manual 39 Space Heating If the water heater is to be used for both water (potable) heating and space heati ng then the following apply. • The piping and components co nnected to the water heat er shall be suitable for use with potable water. • Toxic chemicals, such as used for boiler treatmen t, shall not be introduced into ...
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Rinnai R75LSI - page 40
40 VA Series Indoor LS Manual D i m e n s i o n s A B C D K I J G F H E DIM DESCRIPTION R50LSi R75LSi R94LSi in (mm) R98LSi R98LSi-ASME in (mm) A Width 14 (355.6) 18.5 (470) B Depth * 9.6 (244.5) 9.1 (230.5) C Height - Unit 22.9 (582) 23.6 (600) D Height - with brackets 25.5 (648.2) 25.2 (639.8) E Hot Water Ou tlet - from wall * 3.6 (91) 4.3 (110) ...
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Rinnai R75LSI - page 41
VA Series Indoor LS Manual 41 Ladder Diagram RELAY 1 IG FROST SENSI NG SWI TCH ANT I- FRO S T HEA TE R IG N IT ION COMB USTI ON FA N 3A ( F US E ) 3A (FU SE ) HOT NE UTR AL VA RI S TO R DC1 2.6V SOLENO ID D R IV IN G CI RC U I T CP U CENT RA L PR OC E SS I N G UNIT FA N REMOTE CONTROLLER POV FA N CONTROL CI RCUI T BY - P ASS FLOW CONTROL DE VI C E ...
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Rinnai R75LSI - page 42
42 VA Series Indoor LS Manual What is covered? This Warranty covers any defects in materials or workmanship when the product is installed an d operated according to Rinnai written installation instructions, subject to the terms within this Limited Warrant y document. This Warranty appl ies only to products that are installed per local a nd/ or stat ...
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Rinnai R75LSI - page 43
VA Series Indoor LS Manual 43 What will Rinnai do? Rinnai will repair or replace the covere d product or any part or co mponent that is defective in materials or workmanship as set forth. Rinnai will pay reasonable l abor charges associated with t he repair or replacement of an y such part or component. All repair parts must be genuine Rinnai parts ...
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Rinnai R75LSI - page 44
Rinnai’ s other f ine pr oducts Rinnai Amer ica Corporation 103 International Drive Peachtree City, GA 30269 TOLL FREE: 1-800-621- 9419 FAX: 678-829-166 6 www.rinnai.us © 2008 Rinnai America Corpo ration Direct Vent Furnaces • High Efficiency • Cool-to-the-touch Cabinet • Blower Included • Vent Terminal A Included • 556 and 1004 Models ...
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