Rinnai RC98I Service manual

Rinnai RC98I Service manual
Tankless Water Heater
Service Manual
Key to Trade Names in this Manual:
PC BOARD
R/C42e, R/C53e
10
28
41
49
54
59
69
R70e,
R/C85e(PLUS)
12
29
43
50
56
65
72
R/C53i(PLUS),
R/C85i(PLUS)
12
30
43
51
56
65
76
R/C98e(ASME)
14
31
45
52
56
67
80
R/C98i(ASME)
14
31
45
52
56
67
82
V53e, R63LSe
16
32
41
49
55
60
69
R50LSi,
R75LSi-VA
18
33
43
51
56
63
76
R63LSe2,
R75LSe-VA
18
33
43
50
56
63
72
R94LSe-VA
18
33
43
50
56
63
72
R94LSi-VA
18
33
43
51
56
63
76
R75LSe-VB
20
34
47
50
56
63
72
R75LSi-VB
20
34
47
51
56
63
76
R94LSe-VB
20
34
47
50
56
63
72
Model with
valves in carton
R94LSi-VB
20
34
47
51
56
63
76
RV53e
V53e
V53i
20
35
43
51
56
63
76
RV53i
V53i
R98LSe(ASME)
22
36
45
52
58
67
80
RL75e
R75LSe-VB
R98LSi(ASME)
22
36
45
52
58
67
82
RL75i
R75LSi-VB
RC80HPe
24
37
47
53
56
68
85
RL94e
R94LSe-VB
RC80HPi
24
37
47
53
56
68
88
RL94i
R94LSi-VB
RC98HPe
26
38
48
53
56
68
91
RC80e
RC80HPe
RC98HPi
26
38
48
53
56
68
94
RC80i
RC80HPi
RC98e
RC98HPe
RC98i
RC98HPi
WATER FLOW
CONTROL
HEAT
EXCHANGER
FAN
Indicates condensing water heater models.
GAS CONTROL
RC
WIRE DIAGRAM
Indicates both the residential and
commercial versions. R/C42e includes
R42e and C42e.
DIAGNOSTICS
R/C
MODELS
This manual provides service information for the models
below. This table cross references each model to the
applicable page number for internal component
replacement instructions.
(PLUS) Indicates that the Designer Plus models are
included. R/C85ePLUS includes R85e,
C85e, and R85ePLUS. On the side of the
water heater, the trade name includes a
“D”, as in R85De.
(ASME) Indicates that the ASME models are
included. R98LSe(ASME) includes the
R98LSe and R98LSeASME.
-VA,-VB The trade names R75LSe, R75LSi,
R94LSe, and R94LSi have been given to
both the VA and VB series of water
heaters. Pay close attention to the
particular model number when referencing
electrical diagnostics, wire diagrams, gas
pressures, replacement instructions, and
for parts. When there is a difference –VA
or –VB will be specified.
Some of the trade names for models were changed
to indicate that their cartons included isolation valves
and a pressure relief valve. For service and repair
purposes the table below shows the equivalent
models.
Equivalent Model
100000098 Rev B
Table of Contents
General Information ....................................................3
Fan
Specifications .......................................................... 4-6
R/C42e, R/C53e, V53e, R63LSe................................ 49
Schematic Diagrams ............................................... 7-9
R70e, R/C85e(PLUS), R63LSe2,
R75LSe, R94LSe........................................................ 50
Diagnostic Codes .................................................. 8-10
R/C53i(PLUS), R/C85i(PLUS), R50LSi,
V53i, R75LSi, R94LSi ................................................. 51
Electrical Diagnostic Points
R/C42e, R/C53e, ................................................. 10, 11
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME) ............................... 52
R70e, R/C85e(PLUS),
R/C53i(PLUS), R/C85i(PLUS) ............................. 12, 13
RC80HPe, RC80HPi, RC98HPe, RC98HPi ............... 53
R/C98e(ASME), R/C98i(ASME) ........................... 14, 15
PC Board
V53e, R63LSe ...................................................... 16, 17
R/C42e, R/C53e ......................................................... 54
R50LSi, R63LSe2, R75LSe-VA, R75LSi-VA,
R94LSe-VA, R94LSi-VA ...................................... 18, 19
V53e, R63LSe ............................................................ 55
R/C53i(PLUS), R70e, R/C85e(PLUS),
R/C85i(PLUS), R50LSi, R63LSe2, V53i,
R75LSe, R75LSi, R94LSe, R94LSi,
RC80HPe, RC80HPi, RC98HPe, RC98HPi .......... 56-57
V53i, R75LSe-VB, R75LSi-VB,
R94LSe-VB, R94LSi-VB ...................................... 20, 21
R98LSe(ASME), R98LSi(ASME) ......................... 22, 23
RC80HPe, RC80HPi ............................................ 24, 25
RC98HPe, RC98HPi ............................................ 26, 27
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME) ............................... 58
Wire Diagrams
Water Flow Control Assembly
R/C42e, R/C53e ..........................................................28
R/C42e, R/C53e ................................................... 59, 60
R70e, R/C85e(PLUS) ..................................................29
V53e, R63LSe ...................................................... 61, 62
R/C53i(PLUS), R/C85i(PLUS).....................................30
R/C53i, R70e, R50LSi, R63LSe2, V53i,
R75LSe, R75LSi ................................................... 63, 64
R/C98e(ASME), R/C98i(ASME) ..................................31
R/C85e(PLUS), R/C85i(PLUS),
R94LSe, R94LSi ................................................... 65, 66
V53e, R63LSe .............................................................32
R50LSi, R63LSe2, R75LSe-VA, R75LSi-VA,
R94LSe-VA, R94LSi-VA .............................................33
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME) ............................... 67
R75LSe-VB, R75LSi-VB, R94LSe-VB, R94LSi-VB ....34
RC80HPe, RC80HPi, RC98HPe, RC98HPi ............... 68
V53i .............................................................................35
Heat Exchanger
R98LSe(ASME), R98LSi(ASME) ................................36
R/C42e, R/C53e, V53e, R63LSe........................... 69-71
RC80HPe, RC80HPi ...................................................37
R70e, R/C85e(PLUS), R63LSe2,
R75LSe, R94LSe................................................... 72-75
RC98HPe, RC98HPi ...................................................38
Flushing the Heat Exchanger...................................39
Manual Draining of the Water Heater ......................40
R/C53i(PLUS), R/C85i(PLUS), V53i,
R50LSi, R75LSi, R94LSi ....................................... 76-79
Gas Control Assembly
R/C98e(ASME), R98LSe(ASME) .......................... 80-81
R/C42e, R/C53e, V53e, R63LSe ......................... 41, 42
R/C98i(ASME), R98LSi(ASME) ............................ 82-84
R/C53i(PLUS), R70e, R/C85e(PLUS), R/C85i(PLUS),
R50LSi, V53i, R63LSe2, R75LSe-VA, R75LSi-VA,
R94LSe-VA, R94LSi-VA ...................................... 43, 44
RC80HPe .............................................................. 85-87
RC80HPi................................................................ 88-90
RC98HPe .............................................................. 91-93
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME) ......................... 45, 46
RC98HPi................................................................ 94-96
RC80HPe, RC80HPi, R75LSe-VB, R75LSi-VB,
R94LSe-VB, R94LSi-VB .............................................47
Gas Pressure Setting Procedure ....................... 97-98
RC98HPe, RC98HPi ...................................................48
Dip Switches .................................................... 106-108
Rinnai Water Heater Service Manual
Manifold Pressure Settings .............................. 99-105
2
100000098 Rev B
General Information
Safety Definitions
This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and
others.
DANGER
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, could result in minor or
moderate injury. It may also be used to alert against unsafe practices.
Using this Manual
Repairs should be performed by a qualified service technician.
The following information can be referenced for additional information.
•
Operation and Installation Manual
•
Hot Water System Design Manual
•
Technical Sheets
•
Technical Bulletins
Technical Support
Technicians are available to assist in servicing issues. Contact Rinnai Technical Services at 1-800-621-9419.
Recommended Tools
•
Volt/Ohm/Amp meter with test probes
•
Digital manometer or U tube type manometer with 14 inch water column (W.C.) scale, a hose and two 1/8 inch
taps
•
assorted wrenches including a 3/16 Allen wrench
•
assorted screw drivers
•
leak solution or leak detector
•
Teflon tape
WARNING
There are a number of live tests that are required when fault finding this product. Extreme care should be used at
all times to avoid contact with energized components inside the water heater. Before checking for resistance
readings disconnect the power source to the unit and isolate the item from the circuit (unplug it).
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Rinnai Water Heater Service Manual
If any of the original wire as supplied with the appliance must
be replaced, it must be replaced with type 18 AWG wire or its
equivalent.
3
100000098 Rev B
Specifications
V Series - Commercial - Outdoor
Trade Name
C42e
Model
REU-V1616WC
Max Flow [1]
gal/min (liters/min)
Max. BTU
Min. BTU
120,000
17,100 (NG)
17,800 (LP)
4.2
Temperature Range
(16)
120 - 185 ºF (49-85 ºC)
C53e
REU-V2020WC
150,000
19,000 (NG)
20,200 (LP)
5.3
(20)
120 - 185 ºF (49-85 ºC)
C85e
REU-V2532WC
199,000
15,000
8.5
(32)
98 - 185 ºF (37-85 ºC)
C85ePLUS
REU-V2532WCD
199,000
15,000
8.5
(32)
98 - 185 ºF (37-85 ºC)
C98e
REU-V3237WC
237,000
19,000
9.8
(37)
98 - 185 ºF (37-85 ºC)
C98eASME
REU-V3237WC-ASME
237,000
19,000
9.8
(37)
98 - 185 ºF (37-85 ºC)
Max. BTU
Min. BTU
15,000
V Series - Commercial - Indoor
Trade Name
Model
C53i
REU-V2520FFUC
180,000
C53iPLUS
REU-V2520FFUCD
180,000
15,000
C85i
REU-V2532FFUC
180,000
15,000
C85iPLUS
REU-V2532FFUCD
180,000
15,000
C98i
REU-V3237FFUC
237,000
19,000
C98iASME
REU-V3237FFUC-ASME
237,000
19,000
Max. BTU
Min. BTU
Max Flow [1]
gal/min (liters/min)
5.3
Temperature Range
(20)
120 - 185 ºF (49-85 ºC)
5.3
(20)
120 - 185 ºF (49-85 ºC)
8.5
(32)
98 - 185 ºF (37-85 ºC)
8.5
(32)
98 - 185 ºF (37-85 ºC)
9.8
(37)
98 - 185 ºF (37-85 ºC)
9.8
(37)
98 - 185 ºF (37-85 ºC)
V Series - Residential - Outdoor
Trade Name
Model
Max Flow [1]
gal/min (liters/min)
Temperature Range
R42e
REU-V1616W
120,000
17,100 (NG)
17,800 (LP)
4.2
(16)
98 - 140 ºF (37-60 ºC)
R53e
REU-V2020W
150,000
19,000 (NG)
20,200 (LP)
5.3
(20)
98 - 140 ºF (37-60 ºC)
R70e
REU-V2526W
199,000
15,000
7.0
(26)
98 - 140 ºF (37-60 ºC)
R85e
REU-V2532W
199,000
15,000
8.5
(32)
98 - 140 ºF (37-60 ºC)
R85ePLUS
REU-V2532WD
199,000
15,000
8.5
(32)
98 - 140 ºF (37-60 ºC)
R98e
REU-V3237W
237,000
19,000
9.8
(37)
98 - 140 ºF (37-60 ºC)
R98eASME
REU-V3237W-ASME
237,000
19,000
9.8
(37)
98 - 140 ºF (37-60 ºC)
Max. BTU
Min. BTU
V Series - Residential - Indoor
Trade Name
Model
Max Flow [1]
gal/min (liters/min)
Temperature Range
R53i
REU-V2520FFU
180,000
15,000
5.3
(20)
98 - 140 ºF (37-60 ºC)
R53iPLUS
REU-V2520FFU
180,000
15,000
5.3
(20)
98 - 140 ºF (37-60 ºC)
R85i
REU-V2532FFU
180,000
15,000
8.5
(32)
98 - 140 ºF (37-60 ºC)
R85iPLUS
REU-V2532FFUD
180,000
15,000
8.5
(32)
98 - 140 ºF (37-60 ºC)
R98i
REU-V3237FFU
237,000
19,000
9.8
(37)
98 - 140 ºF (37-60 ºC)
R98iASME
REU-V3237FFU-ASME
237,000
19,000
9.8
(37)
98 - 140 ºF (37-60 ºC)
[1] Minimum activation flow is approximately 0.6 gallons/minute (2.3 liters/min)
Rinnai Water Heater Service Manual
4
100000098 Rev B
Specifications
VA Series (LS Series) - Residential or Commercial - Outdoor
Trade Name
Model
Max. BTU
Min. BTU
Max Flow [1]
gal/min (liters/min)
R63LSe
REU-VA2024WD-US
150,000
21,500 (NG)
20,600 (LP)
6.3
R63LSe2
REU-VA2024WD(A)-US
150,000
15,000
6.3
(24)
R75LSe
REU-VA2528WD-US
REU-VA2528WD(A)-US
REU-VA2528WD(A)-UC
199,000
15,000
7.5
(28)
180,000
15,000
7.5
(28)
R94LSe
REU-VA2535WD-US
REU-VA2535WD-UC
199,000
15,000
9.4
(35)
R98LSe
REU-VA3237W-US
237,000
19,000
9.8
(37)
237,000
19,000
9.8
(37)
R75LSe
R98LSeASME REU-VA3237W-ASME
Temperature Range
(24)
98 - 140 ºF (37-60 ºC) [2]
98 - 140 ºF (37-60 ºC) [3]
VA Series (LS Series) - Residential or Commercial - Indoor
Trade Name
Model
Max. BTU
Min. BTU
Max Flow [1]
gal/min (liters/min)
R50LSi
REU-VA2019FFUD-US
150,000
15,000
5.0
(19)
R75LSi
REU-VA2528FFUD-US
199,000
15,000
7.5
(28)
R75LSi
REU-VA2528FFUD(A)US
REU-VA2528FFUD(A)UC
180,000
15,000
7.5
(28)
R94LSi
REU-VA2535FFUD-US
REU-VA2535FFUD-UC
199,000 (NG)
190,000 (LPG)
15,000
9.4
(35)
R98LSi
REU-VA3237FFU-US
237,000
19,000
9.8
(37)
R98LSiASME
REU-VA3237FFU-ASME
237,000
19,000
9.8
(37)
Temperature Range
98 - 140 ºF (37-60 ºC) [2]
98 - 140 ºF (37-60 ºC) [3]
VA Series - Residential - Outdoor
Trade Name
V53e
Model
REU-VAM1620W-US
Max. BTU
Min. BTU
120,000
19,000 (NG)
20,200 (LP)
Max Flow [1]
gal/min (liters/min)
5.3
(20)
Temperature Range
98 - 140 ºF (37-60 ºC)
[1] Minimum activation flow is approximately 0.6 gallons/minute (2.3 liters/min)
[2] Max temperature is 160 ºF (71 ºC) with the MCC-91 controller for commercial and hydronic applications only.
[3] Max temperature is 185 ºF (85 ºC) with the MCC-91 controller for commercial and hydronic applications only.
Rinnai Water Heater Service Manual
5
100000098 Rev B
Specifications
VB Series (LS Series) - Residential or Commercial - Outdoor
Trade Name
Model
Max. BTU
Min. BTU
Max Flow [1]
gal/min (liters/min)
Temperature Range
R75LSe,
RL75e
REU-VB2528WD-US
180,000
9,900 (NG)
10,300 (LPG)
7.5
(28)
98 - 140 ºF (37-60 ºC) [2]
R94LSe,
RL94e
REU-VB2735WD-US
199,000
9,900 (NG)
10,300 (LPG)
9.4
(35)
98 - 140 ºF (37-60 ºC) [3]
VB Series (LS Series) - Residential or Commercial - Indoor
Trade Name
Model
Min. BTU
180,000
9,900 (NG)
10,300 (LPG)
7.5
(28)
98 - 140 ºF (37-60 ºC) [2]
199,000 (NG) 9,900 (NG)
190,000 (LPG) 10,300 (LPG)
9.4
(35)
98 - 140 ºF (37-60 ºC) [3]
R75LSi, RL75i REU-VB2528FFUD-US
R94LSi, RL94i REU-VB2735FFUD-US
Max Flow [1]
gal/min (liters/min)
Max. BTU
Temperature Range
VB Series - Residential - Indoor
Trade Name
V53i, RV53i
Model
REU-VB2020FFU-US
Max. BTU
Min. BTU
150,000
15,000
Max Flow [4]
gal/min (liters/min)
5.3
(20)
Temperature Range
98 - 140 ºF (37-60 ºC)
Condensing Series - Residential or Commercial - Outdoor
Trade Name
Model
Max. BTU
Min. BTU
Max Flow [1]
gal/min (liters/min)
RC80HPe,
RC80e
REU-KA2530WD-US
157,000
9,500 (NG)
10,300 (LPG)
8.0
(30)
RC98HPe,
RC98e
REU-KA3237WD-US
199,000
9,500 (NG)
10,300 (LPG)
9.8
(37)
Temperature Range
98 - 140 ºF (37-60 ºC) [3]
Condensing Series - Residential or Commercial - Indoor
Trade Name
Model
Max. BTU
Min. BTU
Max Flow [1]
gal/min (liters/min)
RC80HPi,
RC80i
REU-KA2530FFUD-US
157,000
9,500 (NG)
10,300 (LPG)
8.0
(30)
RC98HPi,
RC98i
REU-KA3237FFUD-US
199,000
9,500 (NG)
10,300 (LPG)
9.8
(37)
Temperature Range
98 - 140 ºF (37-60 ºC) [3]
[1] Minimum activation flow is approximately 0.4 gallons/minute (1.5 liters/min); minimum flow is approximately
0.26 gallons/minute (1 liter/min).
[2] Max temperature is 160 ºF (71 ºC) with the MCC-91 controller for commercial and hydronic applications only.
[3] Max temperature is 185 ºF (85 ºC) with the MCC-91 controller for commercial and hydronic applications only.
[4] Minimum activation flow is approximately 0.6 gallons/minute (2.3 liters/min).
Rinnai Water Heater Service Manual
6
100000098 Rev B
Diagnostic Codes
The Rinnai water heater has the ability to check its own operation continuously. If a fault occurs, an error code
will flash on the display of the remote controller. This assists with diagnosing the fault and may enable you to
overcome a problem without a service call.
WARNING
Some of the checks below may need to be done by a qualified service technician. Call a
service technician for any remedy that involves gas or electricity. Call a service
technician if you have any doubt or reservation about performing the remedy yourself.
Accessing Operating Information
Models MC-91 and MCC-91
To display the most recent error codes press and hold the “On/Off” button for 2 seconds. While holding the “On/
Off” button press the ▲ button. The last 9 error codes will flash one after the other. To exit this mode press the
“On/Off” and ▲ button as before.
To display the water flow through the water heater press and hold the ▲ button for 2 seconds and without
releasing the ▲ button press the “On/Off” button.
To display the outlet water temperature press and hold the ▼ button for 2 seconds and without releasing the ▼
button press the “On/Off” button.
Operation
1.
Water Flow Begins.
4.
• Water Flow Sensor sends pulses to the PC
Shut-down Sequence.
• Shut-down begins when the PC Board senses
Board.
• PC Board senses flow.
• Firing Sequence begins when the flow exceeds
•
•
the minimum activation flow rate.
2.
3.
Firing Sequence.
• PC Board monitors inlet/outlet water
temperature, temperature set point, and water
flow rate.
5.
• Combustion fan energized. Purges combustion
chamber.
• Spark igniter begins sparking.
• Gas control valve opens to minimum fire rate.
• Flame rod(s) proves ignition.
• Spark igniter stops sparking.
•
the minimum flow rate which is 0.26 - 0.5 gpm
depending on model.
Gas control valve closes.
Water flow control valve resets to standby
position.
Combustion fan runs for a short period of time
at low speed.
Standby Mode.
• PC Board monitors water temperature and
remote controls.
• Freeze protection is activated as needed.
Normal Operation.
• PC Board monitors flame rod, fan motor
frequency, outlet water temperature, controller
temperature set point and water flow rate.
• Gas control valve modulates gas input to
required firing rate.
• Combustion fan speed is adjusted for the
required firing rate.
• Water flow control valve is adjusted as needed.
Rinnai Water Heater Service Manual
7
100000098 Rev B
Diagnostic Codes
Code
Definition
Remedy
02
No burner operation during
freeze protection mode
ONLY FOR NONCONDENSING MODELS
Power interruption during Bath
Fill (Water will not flow when
power returns).
Service Call
10
Air Supply or Exhaust
Blockage
11
No Ignition
12
Flame Failure
14
Thermal Fuse
16
Over Temperature Warning
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.
For non-condensing models, ensure condensation collar was installed correctly.
Verify dip switches are set properly.
Check fan for blockage.
Check the fins in the heat exchanger.
For condensing models, Burner Sensor Error (see code 31)
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 EZConnect or MSA controls to isolate the problem.
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.
If flame is visible, check the flame rod circuit.
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.
For non-condensing models, 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 EZConnect or MSA controls to isolate the problem.
Check power supply for loose connections.
Check power supply for proper voltage and voltage drops.
Ensure flame rod wire is connected.
Ensure flame rod is in proper position (wire should connect at 6 o’clock position).
Remove flame rod and check for carbon build-up; clean with sand paper or emery cloth.
Disconnect and reconnect 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.
Check the ground wire for the PC board.
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. Hard water must be treated
to prevent scale build up or damage to the 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 the intake and exhaust system.
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 blockage in the heat exchanger.
03
Turn off all hot water taps. Press ON/OFF twice.
Rinnai Water Heater Service Manual
8
100000098 Rev B
Diagnostic Codes
Code
Definition
Remedy
25
Condensate Trap Error
ONLY FOR
CONDENSING MODELS
Condensate container is full.
Check condensate drain for blockage.
Replace condensate trap.
31
Burner Sensor Error
ONLY FOR VB AND
CONDENSING INDOOR
MODELS
Outgoing Water
Temperature Sensor
Measure resistance of sensor.
Replace sensor.
32
33
Heat Exchanger Outgoing
Temperature Sensor
34
61
Combustion Air
Temperature Sensor
ONLY FOR INDOOR
NON-CONDENSING
MODELS (EXCEPT
R98LSi)
Modulating Solenoid
Valve Signal Abnormal
Combustion Fan Failure
65
Water Flow Control
70
Sensor Harness
Connection
ONLY FOR
CONDENSING MODELS
71
Solenoid Valve Circuit
72
Flame Sensing Device
73
LC
Burner Sensor Circuit
ONLY FOR VB AND
CONDENSING INDOOR
MODELS
Scale Build-up in Heat
Exchanger (when
checking maintenance
code history, “00” is
substituted for “LC”)
No
code
Nothing happens when
water flow is activated.
52
Check sensor wiring for damage.
Measure resistance of sensor.
Clean sensor of scale build-up.
Replace sensor.
Check sensor wiring to be sure it has not been short circuited.
Measure resistance of sensor.
Clean sensor of scale build-up.
Replace sensor.
Check for restrictions in the intake and exhaust system.
Check sensor wiring for damage.
Measure resistance of sensor.
Clean sensor of scale build-up.
Check the fan blade to be sure it is tight on motor shaft and is in good condition.
Replace sensor.
Check modulating gas solenoid valve wiring harness for loose or damaged 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.
Check for proper voltage from PC board.
The water flow control valve has failed to close during the bath fill function. Immediately turn off
the water and discontinue the bath fill function. Contact a state qualified or licensed contractor to
service the appliance.
Check PC board switches (in the bank of 6 switches, #2 should be on for indoor models and off for
outdoor models)
Check the connection harness at the E connection on the PC board. Outdoor models should have
2 orange cables at #7 and 8 positions. Indoor models should not have cables at these positions. If
this is incorrect then replace the sensor harness.
Replace PC board
For non-condensing, check wiring harness to all solenoids for damage and/or loose connections.
Measure resistance of each solenoid valve coil.
For condensing, replace PC board.
Verify flame rod is touching flame when unit fires.
Check all wiring to flame rod.
Remove flame rod and check for carbon build-up; clean with sand paper or emery cloth.
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.
Check sensor wiring and PC board to be sure they have not been damaged.
Replace sensor.
Flush heat exchanger. Refer to instructions in manual. Hard water must be treated to prevent
scale build up or damage to the heat exchanger.
Replace heat exchanger.
NOTE: The LC code is the only code that will allow the unit to keep running. The display will
alternate between the LC code and the temperature setting. The controller will continue to beep.
The LC code will reset if power is turned off and then on.
On controller, verify if unit is sensing flow. If not then check the items below. If unit is
sensing flow then check the heat exchanger and outlet thermistors.
Clean inlet water supply filter.
On new installations ensure hot and cold water lines are not reversed.
Check for cold to hot cross over. Isolate circulating system if present. Turn off cold water to the
unit, open pressure relief valve; if water continues to flow, there is bleed over in your plumbing.
Verify you have at least the minimum flow rate required to fire unit.
Verify turbine spins freely.
Measure the resistance of the water flow control sensor.
If the display is blank and clicking is coming from the unit, disconnect the water flow servo motor
(RD, BL, BR, GY, YL). If the display come on then replace the water flow servo motor.
Rinnai Water Heater Service Manual
9
100000098 Rev B
Electrical Diagnostic Points
R/C42e, R/C53e
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
Black - White
90 - 100 VAC
51-63 ohms
F2
1~2
Blue - Brown
108 - 132 VAC
51-63 ohms
F3
1~3
E1
1~2
E2
1~2
E3
1~2
(TR) Transformer
(SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids
(Main) Pink - Black
(SV1) Black - Blue
80 - 100 VDC
1.7 - 2 K ohms
(SV2) Black - Yellow
(POV) Pink - Pink
2 - 15 VDC
67 - 81 ohms
C2
1~2
Red - Blue
11 - 13 VDC
22 - 26 ohms
B1
1~2
Gray - Brown
4 - 6 VDC
N/A
B1
6~3
Gray - Yellow
N/A
N/A
B1
6~5
Gray - Orange
11 - 14 VDC
N/A
B1
6~4
(M) Water Flow Servo
NOTE: At the B connector on the PCB: gray wire turns to black, orange wire turns to red
(QS) Water Flow Sensor
Black - Red
11 - 13 VDC
5.5 - 6.2 K ohms
B3
3~1
Yellow - Black
4 - 7 VDC
1 - 1.4 mega ohms
B3
2~3
90 - 100 VAC
N/A
F1
1~2
(IG) Ignition System
Gray - Gray
(FM) Combustion Fan Motor
Red - Black
6 - 45 VDC
N/A
A1
1~2
White - Black
5 - 10 VDC
9.2 - 9.4 K ohms
A1
2~4
Yellow - Black
11 ~ 13 VDC
3.5 - 3.9 K ohms
A1
2~3
With the meter set on hertz scale, 60-350 hertz should be across the red and yellow wires at
terminals 2 and 3.
Rinnai Water Heater Service Manual
10
100000098 Rev B
Electrical Diagnostic Points
R/C42e, R/C53e
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
Thermal Fuse / Overheat Switch
Red - Red
12 VDC
below 1 ohm
B, C
6 (B) ~ 1 (C)
Flame Rod
Place one lead of the meter to the flame rod and the other to ground. Flame rod to ground should
read 1 mega ohm with unit not running. With the unit running, 5-150 VAC should be read. If voltage
range is incorrect then replace PC board. Set the meter to the μ amp scale and series the meter in
line with the flame rod. Proper flame circuit should read 1 micro-amp or greater. If micro-amp range
is incorrect then clean flame rod; replace flame rod if cleaning fails.
Thermistors
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set the meter to
the 20 K ohm scale and read resistance. Applying heat to the thermistor bulb should decrease the
resistance. Applying ice to the thermistor bulb should increase the resistance. Typical resistance
values are: 11.4-14 K ohm for 59°F; 6.4-7.8 K ohm for 86°F; 3.6-4.5 K ohm for 113°F; 2.2-2.7 K ohm
for 140°F; 0.6-0.8 K ohm for 221°F
Outgoing Water Thermistor
White - White
see above
B4
1~2
B5
1~2
Heat Exchanger Temperature Thermistor
White - White
see above
Surge Protector
Blue - Brown
108 - 132 VAC
N/A
F4
1~2
Blue - Brown
108 - 132 VAC
N/A
F3
1~3
With the power off, check the continuity through the surge protector. Check by placing one meter
lead on the top pin #1 and bottom pin #2. Check by placing one meter lead on the top pin #3 and
bottom pin #1. If there is continuity across both sets of points, then the surge protector is good.
Controller
Terminals D1
10 - 13 VDC
digital
1.5 - 1.9 K ohms
D
1~3
Frost Protection
There are electrical heating elements mounted at different points to protect the water heater from
freezing.
heaters located on the hot water outlet line
26 - 30 ohms
heater located on heat exchanger piping
81 - 86 ohms
heater located on water flow sensor
16 - 19 ohms
Amp fuses
There are two inline 3 amp glass fuses. Remove the fuse and check continuity through it. If there is
continuity then the fuse is good.
Rinnai Water Heater Service Manual
11
100000098 Rev B
Electrical Diagnostic Points
R70e, R/C85e(PLUS),
R/C53i(PLUS), R/C85i(PLUS)
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
Black - White
90 - 100 VAC
51-63 ohms
F9
1~2
Blue - Brown
108 - 132 VAC
51-63 ohms
F7
1~3
E1
1~2
E2
1~2
E3
1~2
E4
1~2
(TR) Transformer
(SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids
(Main) Pink - Black
(SV1) Black - Yellow
(SV2) Black - Blue
80 - 100 VDC
1.7 - 2 K ohms
(SV3) Black - Brown
(POV) Pink - Pink
2 - 15 VDC
67 - 81 ohms
C2
1~2
Red - Blue
11 - 13 VDC
22 - 26 ohms
1~2
Gray - Brown
4 - 6 VDC
N/A
B1 outdoor
models
Gray - Yellow
N/A
N/A
Gray - Orange
11 - 14 VDC
N/A
(M) Water Flow Servo
B2 indoor
models
6~3
6~5
6~4
NOTE: At the B connector on the PCB: gray wire turns to black, orange wire turns to red
(QS) Water Flow Sensor
Black - Red
11 - 13 VDC
5.5 - 6.2 K ohms
Yellow - Black
4 - 7 VDC
1 - 1.4 mega ohms
1~3
B1 outdoor
models
B2 indoor
models
2~3
Bypass Flow Control (only on R/C85e, R/C85ePLUS, R/C85i, R/C85iPLUS)
Brown - White
Orange - White
Yellow - White
1~5
2 - 6 VDC
(unit in operating
mode)
15 - 35 K ohms
2~5
G1 (plug between
bypass and PCB)
3~5
Red - White/Ground
4~5
(IG) Ignition System
Gray - Gray
90 - 100 VAC
N/A
F8
1~2
(FM) Combustion Fan Motor
Red - Black
6 - 45 VDC
N/A
A1
1~2
White - Black
5 - 10 VDC
9.2 - 9.4 K ohms
A1
2~4
Yellow - Black
11 ~ 13 VDC
3.5 - 3.9 K ohms
A1
2~3
With the meter set on hertz scale, 60-350 hertz should be across the red and yellow wires at
terminals 2 and 3.
Rinnai Water Heater Service Manual
12
100000098 Rev B
Electrical Diagnostic Points
R70e, R/C85e(PLUS),
R/C53i(PLUS), R/C85i(PLUS)
Wire Color
Voltage
Resistance
Connector No.
Pin No.’s
below 1 ohm
C3-B2 outdoor models
C3-B3 indoor models
1~1
Thermal Fuse / Overheat Switch
Red - Red
12 VDC
Flame Rod
Place one lead of the meter to the flame rod and the other to ground. Flame rod to ground should read 1 mega
ohm with unit not running. With the unit running, 5-150 VAC should be read. If voltage range is incorrect then
replace PC board. Set the meter to the μ amp scale and series the meter in line with the flame rod. Proper flame
circuit should read 1 micro-amp or greater. If micro-amp range is incorrect then clean flame rod; replace flame
rod if cleaning fails.
Thermistors
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set the meter to the 20 K ohm
scale and read resistance. Applying heat to the thermistor bulb should decrease the resistance. Applying ice to
the thermistor bulb should increase the resistance. Typical resistance values are: 11.4-14 K ohm for 59°F; 6.4-7.8
K ohm for 86°F; 3.6-4.5 K ohm for 113°F; 2.2-2.7 K ohm for 140°F; 0.6-0.8 K ohm for 221°F
Outgoing Water Thermistor
White - White
see above
B4 outdoor models
B5 indoor models
1~2
B5 outdoor models
B6 indoor models
1~2
Heat Exchanger Temperature Thermistor
White - White
see above
Surge Protector
Blue - Brown
108 - 132 VAC
N/A
F6
1~2
Blue - Brown
108 - 132 VAC
N/A
F7
1~3
With the power off, check the continuity through the surge protector. Check by placing one meter lead on the top
pin #1 and bottom pin #2. Check by placing one meter lead on the top pin #3 and bottom pin #1. If there is
continuity across both sets of points, then the surge protector is good.
Controller
Terminals D1
10 - 13 VDC
digital
1.5 - 1.9 K ohms
D
1~3
Frost Protection
There are electrical heating elements mounted at different points to protect the water heater from freezing.
heaters located on the hot water outlet line
26 - 30 ohms
heater located on heat exchanger piping
81 - 86 ohms
heater located on water flow sensor
16 - 19 ohms
Amp fuses
There are two inline 3 amp glass fuses. Remove the fuse and check continuity through it. If there is continuity
then the fuse is good.
Rinnai Water Heater Service Manual
13
100000098 Rev B
Electrical Diagnostic Points
R/C98e(ASME),
R/C98i(ASME)
Wire Color
Voltage
Resistance
Connector No.
Pin No.’s
F1 (pins 1, 2)
4 ~ 5(F)
F2 (pins 1, 2)
3 ~ 4(F)
F3 (pins 1, 2)
2 ~ 4(F)
F4 (pins 1, 2)
1 ~ 4(F)
(SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids
(Main) Pink - Black
(SV1) Black - Red
(SV2) Black - Orange
24 - 28 ohms
11 - 13 VDC
37 - 43 ohms
(SV3) Black - Yellow
(POV) Orange - Orange
3 - 15 VDC
67 - 81 ohms
E2 (pins 1, 2)
3 ~ 4(E)
Red - Blue
11 - 13 VDC
N/A
G6 (pins 1, 2)
5 ~ 6(G)
Gray - Brown (closed
position)
below 1 VDC
Limiter On
4 - 6 VDC
Limiter Off
G6 (pins 5, 3)
8 ~ 11(G)
Gray - Yellow (open
position)
below 1 VDC
Limiter On
4 - 6 VDC
Limiter Off
G6 (pins 5, 4)
7 ~ 11(G)
(M) Water Flow Servo
NOTE: At the G connector on the PCB: gray wire turns to black
(QS) Water Flow Sensor
Black - Red
11 - 13 VDC
N/A
G3 (pins 3, 1)
9 ~ 15(G)
Yellow - Black
4 - 7 VDC
N/A
G3 (pins 2, 3)
11 ~ 15(G)
H1 (pins 1, 5)
1(H) ~ 9(G)
H1 (pins 2, 5)
3(H) ~ 9(G)
H1 (pins 3, 5)
4(H) ~ 9(G)
H1 (pins 4, 5)
2(H) ~ 9(G)
N/A
C1
1 ~ 2(C)
Bypass Flow Control
Brown - White
Orange - White
Yellow - White
2 - 6 VDC
(unit in operating
mode)
15 - 35 K ohms
Red - White/Ground
NOTE: At the G connector on the PCB: white wire turns to red
(IG) Ignition System
Gray - Gray
90 - 100 VAC
(FM) Combustion Fan Motor
Red - Black
6 - 45 VDC
N/A
B1
1 ~ 2(B)
White - Black
5 - 10 VDC
N/A
B1
2 ~ 4(B)
Yellow - Black
11 ~ 13 VDC
N/A
B1
2 ~ 3(B)
With the meter set on hertz scale, 17-460 hertz should be across the white and black wires at terminals 2
and 4.
Rinnai Water Heater Service Manual
14
100000098 Rev B
Electrical Diagnostic Points
R/C98e(ASME),
R/C98i(ASME)
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
12 VDC
below 1 ohm
G1 (red) pin 1 - E3 (white) pin 1
12 VDC
below 1 ohm
Thermal Fuse
White - Red
Overheat Switch
Red - Red
G2
1~2
Flame Rod
Place one lead of the meter to the flame rod and the other to ground. With the unit running, 5-150
VAC should be read. Set the meter to the μ amp scale and series the meter in line with the flame
rod. Proper flame circuit should read 1 μ amp or greater. If not, then remove the flame rod and
check for carbon build-up. Clean with sand paper or emery cloth.
Thermistors
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set the meter to
the 20 K ohm scale and read resistance. Applying heat to the thermistor bulb should decrease the
resistance. Applying ice to the thermistor bulb should increase the resistance. Typical resistance
values are: 11.4-14 K ohm for 59°F; 6.4-7.8 K ohm for 86°F; 3.6-4.5 K ohm for 113°F; 2.2-2.7 K ohm
for 140°F; 0.6-0.8 K ohm for 221°F
Outgoing Water Thermistor
White - White
see above
G5
1~2
G4
1~2
Heat Exchanger Temperature Thermistor
White - White
see above
Surge Protector
Black - White
108 - 132 VAC
N/A
D1
Black - White
108 - 132 VAC
N/A
D2
1~3
With the power off, check the continuity through the surge protector. Check by placing one meter
lead on the top pin #1 and bottom pin #2. Check by placing one meter lead on the top pin #2 and
bottom pin #1. If there is continuity across both sets of points, then the surge protector is good.
Controller
10 - 13 VDC
digital
N/A
A
1 ~ 3(A)
White - White
120 VAC *
150 ohms
D4
1~2
White - White
60 VAC *
360 ohms
D5
1~2
White - White
60 VAC*
360 ohms
D6
1~2
Black - Black
Frost Protection
* only when Frost Sensing Switch (D3) is ON
Amp fuses
There are two inline 3 amp glass fuses. Remove the fuse and check continuity through it. If there is
continuity then the fuse is good.
Rinnai Water Heater Service Manual
15
100000098 Rev B
Electrical Diagnostic Points
V53e, R63LSe
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
(SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids
(Main) Pink - Black
37 - 43 ohms
F5
1~2
35 - 41 ohms
F6
1~2
37 - 43 ohms
F7
1~2
2 - 15 VDC
67 - 81 ohms
F3
1~2
Red - Blue
11 - 13 VDC
22 - 28 ohms
E5 (1, 2)
9 ~ 8 (E)
Gray - Brown
4 - 6 VDC
N/A
E5 (5, 3)
4 ~ 6 (E)
Gray - Yellow
N/A
N/A
E5 (5, 4)
4 ~ 7 (E)
(SV1) Black - Blue
11 - 13 VDC
(SV2) Black - Yellow
(POV) Pink - Pink
(M) Water Flow Servo
NOTE: At the E connector on the PCB: gray wire turns to black
(QS) Water Flow Sensor
Black - Red
11 - 13 VDC
5.5 - 6.2 K ohms
E2
3~1
Yellow - Black
4 - 7 VDC
1 - 1.4 mega ohms
E2
2~3
90 - 110 VAC
N/A
B1
1~2
(IG) Ignition System
Gray - Gray
(FM) Combustion Fan Motor
Red - Black
6 - 45 VDC
N/A
D1
1~2
White - Black
5 - 10 VDC
9.2 - 9.4 K ohms
D1
4~2
Yellow - Black
11 ~ 13 VDC
3.5 - 3.9 K ohms
D1
3~2
With the meter set on hertz scale, 60-420 hertz should be across the white and black wires at
terminals 2 and 4.
Rinnai Water Heater Service Manual
16
100000098 Rev B
Electrical Diagnostic Points
V53e, R63LSe
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
Thermal Fuse / Overheat Switch
Blue - White (thermal fuse side)
Red - Blue (PCB side)
below 1 ohm
12 VDC
E6 F1
1~1
E6 F1
1~1
Flame Rod
Place one lead of the meter to the flame rod and the other to ground. With the unit running, 5-150 VAC should
be read. Set the meter to the μ amp scale and series the meter in line with the flame rod. Proper flame circuit
should read 1 μ amp or greater. If not, then remove the flame rod and check for carbon and damage.
Thermistors
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set the meter to the 20 K
ohm scale and read resistance. Applying heat to the thermistor bulb should decrease the resistance. Applying
ice to the thermistor bulb should increase the resistance. Typical resistance values are: 11.4-14 K ohm for 59°F;
6.4-7.8 K ohm for 86°F; 3.6-4.5 K ohm for 113°F; 2.2-2.7 K ohm for 140°F; 0.6-0.8 K ohm for 221°F
Outgoing Water Thermistor
White - White
see above
E4
1~2
see above
E3
1~2
Heat Exchanger Temperature Thermistor
White - White
Surge Protector
Black - White
108 - 132 VAC
N/A
C2
Blue - Brown
108 - 132 VAC
N/A
C1
1~3
With the power off, check the continuity through the surge protector. Check by placing one meter lead on the top
pin #1 and bottom pin #3. Check by placing one meter lead on the top pin #3 and bottom pin #1. If there is
continuity across both sets of points, then the surge protector is good.
Controller
Terminals A1
10 - 13 VDC
1.5 - 3.0 K ohms
A
1~3
Frost Protection
heaters located on the hot water outlet line
180 - 207 ohms
heater located on heat exchanger piping
156 - 180 ohms
heater located on water flow sensor
24 - 28 ohms
Amp fuses
There are two inline 3 amp glass fuses. Remove the fuse and check continuity through it. If there is continuity
then the fuse is good.
Rinnai Water Heater Service Manual
17
100000098 Rev B
Electrical Diagnostic Points
R50LSi, R63LSe2, R75LSe-VA,
R75LSi-VA, R94LSe-VA, R94LSi-VA
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
(SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids
(Main) Pink - Black
(SV1) Black - Yellow
(SV2) Black - Blue
11 - 13 VDC
36.8 - 44.8 ohms
(SV3) Black - Brown
(POV) Pink - Pink
H5
1~2
H6
1~2
H7
1~2
H8
1~2
2 - 15 VDC
67 - 81 ohms
H3
1~2
Red - Blue
11 - 13 VDC
22 - 26 ohms
F7 (1, 2)
10 ~ 9 (F)
Gray - Brown
4 - 6 VDC
N/A
F7 (5, 3)
5 ~ 7 (F)
Gray - Yellow
N/A
N/A
F7 (5,4)
5 ~ 8 (F)
(M) Water Flow Servo
NOTE: At the F connector on the PCB: gray wire turns to black, orange wire turns to red
(QS) Water Flow Sensor
Black - Red
11 - 13 VDC
5.5 - 6.2 K ohms
F2
1~3
Yellow - Black
4 - 7 VDC
1 - 1.4 mega ohms
F2
2~3
Bypass Flow Control (only on R94LSe and R94LSi)
Brown - White
Orange - White
Yellow - White
1~5
2 - 6 VDC
(unit in operating
mode)
15 - 35 K ohms
2~5
G1
3~5
Red - White/Ground
4~5
(IG) Ignition System
Gray - Gray
90 - 110 VAC
N/A
C1
1~2
(FM) Combustion Fan Motor
Red - Black
6 - 45 VDC
N/A
E1
1~2
White - Black
5 - 10 VDC
9.2 - 9.4 K ohms
E1
2~4
Yellow - Black
11 ~ 13 VDC
3.5 - 3.9 K ohms
E1
2~3
With the meter set on hertz scale, 60-420 hertz should be across the red and yellow wires at
terminals 2 and 4.
Rinnai Water Heater Service Manual
18
100000098 Rev B
Electrical Diagnostic Points
R50LSi, R63LSe2, R75LSe-VA,
R75LSi-VA, R94LSe-VA, R94LSi-VA
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
Thermal Fuse / Overheat Switch
Red - Red (thermal fuse side)
Red - Red (PCB side)
below 1 ohm
11 - 13 VDC
F6 H1
1~1
F6 H1
1~1
Flame Rod
Place one lead of the meter to the flame rod and the other to ground. With the unit running, 5-150 VAC should be
read. Set the meter to the μ amp scale and series the meter in line with the flame rod. Proper flame circuit
should read 1 μ amp or greater. If not, then remove the flame rod and check for carbon and damage.
Thermistors
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set the meter to the 20 K ohm
scale and read resistance. Applying heat to the thermistor bulb should decrease the resistance. Applying ice to
the thermistor bulb should increase the resistance. Typical resistance values are: 11.4-14 K ohm for 59°F; 6.47.8 K ohm for 86°F; 3.6-4.5 K ohm for 113°F; 2.2-2.7 K ohm for 140°F; 0.6-0.8 K ohm for 221°F
Outgoing Water Thermistor
White - White
see above
F5 (1, 1)
3 ~ 4 (F)
see above
F4 (1, 1)
3 ~ 11 (F)
F3 (1, 1)
3 ~ 12 (F)
Heat Exchanger Temperature Thermistor
Pink - White
Intake Air Thermistor (only on R50LSi, R75LSi, R94LSi)
Orange - White
see above
Surge Protector
Black - White
108 - 132 VAC
N/A
D2
1~3
Blue - Brown
108 - 132 VAC
N/A
D1
1~3
With the power off, check the continuity through the surge protector. Check by placing one meter lead on the top
pin #1 and bottom pin #3. Check by placing one meter lead on the top pin #3 and bottom pin #1. If there is
continuity across both sets of points, then the surge protector is good.
Controller
Terminals B1
10 - 13 VDC
1.5 - 3.0 K ohms
B
1~3
Frost Protection
There are electrical heating elements mounted at different points to protect the water heater from freezing.
heaters located on the hot water outlet line
180 - 207 ohms
heater located on heat exchanger piping
156 - 180 ohms
heater located on water flow sensor
24 - 28 ohms
Amp fuses
There are two inline 3 amp glass fuses. Remove the fuse and check continuity through it. If there is continuity
then the fuse is good.
Rinnai Water Heater Service Manual
19
100000098 Rev B
Electrical Diagnostic Points
V53i, R75LSe-VB, R75LSi-VB,
R94LSe-VB, R94LSi-VB
Amp Fuses:
Heat Exchanger and Outgoing Water Temperature
Thermistors:
Indoor models have one inline (5) amp glass fuse.
Outdoor models have one inline (3) amp glass fuse.
Remove the fuse and check continuity through it. If
you have continuity through the fuse then it is good.
Otherwise the fuse is blown and must be replaced.
Check all thermistors by inserting meter leads into
each end of the thermistor plug. Set your meter to the
20 K scale and read resistance. Applying heat to the
thermistor bulb should decrease the resistance.
Applying ice to the thermistor bulb should increase the
resistance.
Flame Rod:
Place one lead of your meter to the flame rod and the
other to ground. With the unit running you should read
between 5-150 VAC. Set your meter to the micro amp
scale. You should read 1 micro amp for proper flame
circuit. In the event of low flame circuit remove the
flame rod and check for carbon or damage.
Frost Protection:
This unit has frost protection heaters mounted at
different points to protect the water heater from
freezing.
COMPONENT
MEASUREMENT POINT
RANGE OF VALUE
CN
WIRE COLOR
TEMP CONTROLLER
A1
Bk-Bk
DC11-13V
THERMAL FUSE
B1/E1
W-W
BELOW 1 Ω
MOD. SOLENOID VALVE
B2
O-O
DC2-15V / 67-82 Ω
MAIN SOLENOID VALVE
B3
P-Bk
SOLENOID VALVE 1
B4
B-Bk
(Y-Bk on V53i)
SOLENOID VALVE 2
B5
Y-Bk
(Bl-Bk on V53i)
SOLENOID VALVE 3
B6
R-Bk
SOLENOID VALVE 4
B7
O-Bk
FLAME ROD 1
B8
Y-FR
FLAME ROD 2
M1
R-FR
SURGE PROTECTOR
C1
SURGE PROTECTOR
C2
MAIN POWER CORD
C3
ANTI FROST HEATER
C4
W-W
IGNITOR
D1
Gy-Gy
AC108-132V
(DURING IGNITION)
HEAT EXCHANGER TH
E2
W-W
15ºC/59ºF: 11.4-14.0 kΩ
OUTGOING WATER TH1
E3
W-W
OUTGOING WATER TH2
E4
W-W
AIR TEMPERATURE TH
E5
W-W
W-Bk
Rinnai Water Heater Service Manual
REMARKS
DC11-13V / 37-43 Ω
NOT ON V53i, RV53i
OVER 1 µ A
(DURING OPERATION)
NOT ON V53i, RV53i
AC108-132V
88-120 Ω
W (OUTDOOR) MODELS
156-211 Ω
FFU (INDOOR) MODELS
30ºC/86ºF: 6.4-7.8 kΩ
45ºC/113ºF: 3.6-4.5 kΩ
60ºC/140ºF: 2.2-2.7 kΩ
105ºC/221ºF: 0.6-0.8 kΩ
20
FFU (INDOOR) MODELS
100000098 Rev B
Electrical Diagnostic Points
V53i, R75LSe-VB, R75LSi-VB,
R94LSe-VB, R94LSi-VB
COMPONENT
MEASUREMENT POINT
CN
RANGE OF VALUE
REMARKS
WIRE COLOR
15ºC/59ºF: 21.5-23.8 kΩ
30ºC/86ºF: 14.7-16.2 kΩ
BURNER THERMISTOR
E6
Bk-Bk
200ºC/392ºF: 0.98-1.02 kΩ
FFU (INDOOR) MODELS
400ºC/752ºF: 210.0-223.9 Ω
600ºC/1112ºF: 85.7-92.7 Ω
WATER FLOW SENSOR
R-Bk
DC11-13V
Y-Bk
DC4-7V (PULSE 20-300 Hz)
E7
R75LS, RL75, R94LS, RL94:
ON: 1.5L/MIN (20Hz)
OFF: 1.0L/MIN (13Hz)
V53i, RV53i
ON: 2.4L/MIN
OFF: 1.7L/MIN
Br-W
BYPASS FLOW CONTROL
G1
O-W
Y-W
DC12V (DC2-6V DURING OPERATION)
15-35 Ω
R94LS, RL94 (2735) MODELS ONLY
R-W
R-O
P-O
B-O
WATER FLOW CONTROL
G2
W-O
R-P
B-W
Y-Gy
COMBUSTION FAN
L1
DC11-13V (DC5-7V DURING
OPERATION)
30-50 Ω
Br-Gy
BELOW DC1V (LIMITER ON)
DC4-6 (LIMITER OFF)
R-Bk
DC15-46V
Y-Bk
DC11-13V
W-Bk
DC5-10V (PULSE 20-420 Hz)
Rinnai Water Heater Service Manual
21
FULL OPEN POSITION
FULL CLOSE POSITION
100000098 Rev B
Electrical Diagnostic Points
R98LSe(ASME),
R98LSi(ASME)
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
(SV1, SV2, SV3, POV) Gas Valve and Modulating Solenoids
(Main) Pink - Black
24 - 28 ohms
H3
1~2
37 - 43 ohms
H4
1~2
37 - 43 ohms
H5
1~2
37 - 43 ohms
H6
1~2
2 - 15 VDC
67 - 81 ohms
H2
1~2
Red - Blue
11 - 13 VDC
22 - 28 ohms
F5 (1, 2)
9 ~ 10 (F)
Gray - Brown
4 - 6 VDC
N/A
F5 (5, 3)
5 ~ 7 (F)
Gray - Yellow
N/A
N/A
F5 (5, 4)
5 ~ 8 (F)
(SV1) Black - Red
(SV2) Black - Orange
11 - 13 VDC
(SV3) Black - Yellow
(POV) Orange - Orange
(M) Water Flow Servo
NOTE: At the F connector on the PCB: gray wire turns to black
(QS) Water Flow Sensor
Black - Red
11 - 13 VDC
5.5 - 6.2 K ohms
F2
1~3
Yellow - Black
4 - 7 VDC
1 - 1.4 mega ohms
F2
2~3
Bypass Flow Control
Brown - White
Orange - White
Yellow - White
1~5
2 - 6 VDC
(unit in operating
mode)
15 - 35 K ohms
2~5
G1
3~5
Red - White/Ground
4~5
(IG) Ignition System
Gray - Gray
90 - 110 VAC
N/A
C1
1~2
(FM) Combustion Fan Motor
Red - Black
6 - 45 VDC
N/A
E1
1~2
White - Black
5 - 10 VDC
9.2 - 9.4 K ohms
E1
2~4
Yellow - Black
11 ~ 13 VDC
3.5 - 3.9 K ohms
E1
2~3
With the meter set on hertz scale, 60-420 hertz should be across the red and yellow wires at
terminals 2 and 4.
Rinnai Water Heater Service Manual
22
100000098 Rev B
Electrical Diagnostic Points
R98LSe(ASME),
R98LSi(ASME)
Wire Color
Voltage
Resistance
Connector No. Pin No.’s
Thermal Fuse / Overheat Switch
Red - White
11 - 13 VDC
below 1 ohm
F6 H1
1~1
F (pin 6), H (pin 12)
Flame Rod
Place one lead of the meter to the flame rod and the other to ground. With the unit running, 5-150
VAC should be read. Set the meter to the μ amp scale and series the meter in line with the flame
rod. Proper flame circuit should read 1 μ amp or greater. If not, then remove the flame rod and
check for carbon and damage.
Thermistors
Check all thermistors by inserting meter leads into each end of the thermistor plug. Set the meter to
the 20 K ohm scale and read resistance. Applying heat to the thermistor bulb should decrease the
resistance. Applying ice to the thermistor bulb should increase the resistance. Typical resistance
values are: 11.4-14 K ohm for 59°F; 6.4-7.8 K ohm for 86°F; 3.6-4.5 K ohm for 113°F; 2.2-2.7 K ohm
for 140°F; 0.6-0.8 K ohm for 221°F
Outgoing Water Thermistor
White - White
see above
F4 (1, 2)
3 ~ 4 (F)
Heat Exchanger Temperature Thermistor
White - White
see above
F3
1~2
Pink - White
see above
F
3 ~ 11
Surge Protector
Black - White
108 - 132 VAC
N/A
D2
1~3
Blue - Brown
108 - 132 VAC
N/A
D1
1~3
With the power off, check the continuity through the surge protector. Check by placing one meter
lead on the top pin #1 and bottom pin #3. Check by placing one meter lead on the top pin #3 and
bottom pin #1. If there is continuity across both sets of points, then the surge protector is good.
Controller
Terminals B1
10 - 13 VDC
1.5 - 3.0 K ohms
B
1~3
Frost Protection
There are electrical heating elements mounted at different points to protect the water heater from
freezing. Voltage through this circuit should be 120 VAC.
heater located on the hot water outlet line
335 - 385 ohms
heater located on heat exchanger piping
156 - 180 ohms
heater located on water flow sensor
335 - 385 ohms
Amp fuses
There are two inline 3 amp glass fuses. Remove the fuse and check continuity through it. If there is
continuity then the fuse is good.
Rinnai Water Heater Service Manual
23
100000098 Rev B
Electrical Diagnostic Points
RC80HPe, RC80HPi
Heat Exchanger and Outgoing Water Temperature
Thermistors:
Amp Fuses:
This unit has one inline (7) amp glass fuse. Remove
the fuse and check continuity through it. If you have
continuity through the fuse then it is good. Otherwise
the fuse is blown and must be replaced.
Check all thermistors by inserting meter leads into
each end of the thermistor plug. Set your meter to the
20 K scale and read resistance. Applying heat to the
thermistor bulb should decrease the resistance.
Applying ice to the thermistor bulb should increase the
resistance.
Flame Rod:
Place one lead of your meter to the flame rod and the
other to ground. With the unit running you should read
between 5-150 VAC. Set your meter to the micro amp
scale. You should read 1 micro amp for proper flame
circuit. In the event of low flame circuit remove the
flame rod and check for carbon or damage.
Frost Protection:
This unit has frost protection heaters mounted at
different points to protect the water heater from
freezing.
COMPONENT
MEASUREMENT POINT
RANGE OF VALUE
CN
PINS
WIRE COLOR
TEMP CONTROLLER
A
1-3
Bk-Bk
DC10-13V
THERMAL FUSE
B1 pin1 to E1 pin 1
R-R
BELOW 1 Ω
MOD. SOLE. VALVE (POV)
B2 (1-2), B (10-11)
B2: O-O
DC2-15V / 67-82 Ω
MAIN SOLE. VALVE (SV0)
B5 (1-2), B (7-8)
B5: P-Bk
SOLENOID VALVE 1
B6 (1-2), B (6-7)
B6: B-Bk
SOLENOID VALVE 2
B7 (1-2), B (5-7)
B7: Y-Bk
SOLENOID VALVE 3
B3 (1-2), B(4-7)
B3: R-Bk
SOLENOID VALVE 4
B4 (1-2), B(3-7)
B4: O-Bk
SURGE PROTECTOR
C1
1-3
Bk-W
SURGE PROTECTOR
C2
1-3
W-W
ANTI FROST HEATER
DC11-13V / 37-43 Ω
AC108-132V
HOT WATER OUTLET LINE
10-20 Ω
HEAT EXCHANGER PIPING
35-50 Ω
WATER FLOW SENSOR, HOT WATER
OUTLET, DRAIN CONNECTION
110-150 Ω
LATENT HEAT EXCHANGER (INDOOR
MODEL ONLY)
90-110 Ω
Gy-Gy
AC108-132V
(DURING IGNITION)
E2 (1, 2), E(5-10)
W-W
15ºC/59ºF: 11.4-14.0 kΩ
OUTGOING WATER TH1
E3
1-2
W-W
OUTGOING WATER TH2
E4
3-4
W-W
IGNITOR
D1
HEAT EXCHANGER TH
1-2
Rinnai Water Heater Service Manual
24
30ºC/86ºF: 6.4-7.8 kΩ
45ºC/113ºF: 3.6-4.5 kΩ
60ºC/140ºF: 2.2-2.7 kΩ
105ºC/221ºF: 0.6-0.8 kΩ
100000098 Rev B
Electrical Diagnostic Points
RC80HPe, RC80HPi
COMPONENT
MEASUREMENT POINT
CN
WATER FLOW SENSOR
BYPASS FLOW CONTROL
WATER FLOW CONTROL
COMBUSTION FAN
RANGE OF VALUE
PINS
WIRE COLOR
1-3
R-Bk
DC11-13V
2-3
Y-Bk
DC4-7V; 1-1.4 MΩ
1-5
Br-W
2-5
O-W
3-5
Y-W
4-5
R-W
3 or 4 - 8
R or P -O
1 or 2 - 8
B or W -O
3-4
R-P
1-2
B-W
7-5
Y-Gy
7-6
Br-Gy
BELOW DC1V (LIMITER ON)
DC0-6 (LIMITER OFF)
1-2
R-Bk
DC6-45V
2-3
Y-Bk
DC11-13V; 3.5-3.9 kΩ
2-4
W-Bk
DC5-10V; 9.2-9.4 kΩ;
(PULSE 20-420 Hz)
E5
G1
G2
L1
Rinnai Water Heater Service Manual
25
DC2-6V DURING OPERATION
15-35 Ω
DC5-7V DURING OPERATION
30-50 Ω
100000098 Rev B
Electrical Diagnostic Points
RC98HPe, RC98HPi
Heat Exchanger and Outgoing Water Temperature
Thermistors:
Amp Fuses:
This unit has one inline (7) amp glass fuse. Remove
the fuse and check continuity through it. If you have
continuity through the fuse then it is good. Otherwise
the fuse is blown and must be replaced.
Check all thermistors by inserting meter leads into
each end of the thermistor plug. Set your meter to the
20 K scale and read resistance. Applying heat to the
thermistor bulb should decrease the resistance.
Applying ice to the thermistor bulb should increase the
resistance.
Flame Rod:
Place one lead of your meter to the flame rod and the
other to ground. With the unit running you should read
between 5-150 VAC. Set your meter to the micro amp
scale. You should read 1 micro amp for proper flame
circuit. In the event of low flame circuit remove the
flame rod and check for carbon or damage.
Frost Protection:
This unit has frost protection heaters mounted at
different points to protect the water heater from
freezing.
COMPONENT
MEASUREMENT POINT
RANGE OF VALUE
CN
PINS
WIRE COLOR
TEMP CONTROLLER
B1
1-3
Bk-Bk
DC10-13V
THERMAL FUSE
E1 pin 1 to B1 pin 1
R-W
BELOW 1 Ω
MOD. SOLE. VALVE (POV)
B2
1-2
O-O
DC2-15V / 67-81 Ω
MAIN SOLE. VALVE (SV0)
B3
1-2
P-Bk
DC11-13V / 24-28 Ω
SOLENOID VALVE 1
B4
1-2
Bl-Bk
SOLENOID VALVE 2
B5
1-2
Y-Bk
SOLENOID VALVE 3
B6
1-2
R-Bk
SOLENOID VALVE 4
B7
1-2
O-Bk
SURGE PROTECTOR
C1
1-3
Bk-W
SURGE PROTECTOR
C2
1-3
W-W
ANTI FROST HEATER
DC11-13V / 37-43 Ω
AC108-132V
HOT WATER OUTLET LINE
180-207 Ω
HEAT EXCHANGER PIPING
156-180 Ω
24-28 Ω
WATER FLOW SENSOR
IGNITOR
D1
1-2
Gy-Gy
HEAT EXCHANGER TH
E2
1-2
W-W
AC90-110V
(DURING IGNITION)
15ºC/59ºF: 11.4-14.0 kΩ
30ºC/86ºF: 6.4-7.8 kΩ
45ºC/113ºF: 3.6-4.5 kΩ
OUTGOING WATER TH1
E4 pins 3,4 to E8 pins 1-2
W-W
60ºC/140ºF: 2.2-2.7 kΩ
105ºC/221ºF: 0.6-0.8 kΩ
Rinnai Water Heater Service Manual
26
100000098 Rev B
Electrical Diagnostic Points
RC98HPe, RC98HPi
COMPONENT
MEASUREMENT POINT
CN
WATER FLOW SENSOR
BYPASS FLOW CONTROL
WATER FLOW CONTROL
COMBUSTION FAN
RANGE OF VALUE
PINS
WIRE COLOR
1-3
R-Bk
DC11-13V; 5.5-6.2 kΩ
2-3
Y-Bk
DC4-7V; 1-1.4 MΩ
1-5
Br-W
2-5
O-W
3-5
Y-W
4-5
R-W
3 or 4 - 8
R or P -O
DC5-7V DURING OPERATION
1 or 2 - 8
B or W -O
DC5-7V DURING OPERATION
3-4
R-P
30-50 Ω
1-2
B-W
30-50 Ω
7-5
Y-Gy
BELOW DC1V (LIMITER ON)
DC0-6 (LIMITER OFF)
7-6
Br-Gy
BELOW DC1V (LIMITER ON)
DC0-6 (LIMITER OFF)
1-2
R-Bk
DC6-45V
2-3
Y-Bk
DC11-13V; 3.5-3.9 kΩ
2-4
W-Bk
DC5-10V; 9.2-9.4 kΩ;
(PULSE 20-420 Hz)
F2
G1
G2
E1
Rinnai Water Heater Service Manual
27
DC2-6V DURING OPERATION
15-35 Ω
100000098 Rev B
Wiring Diagram
R/C42e, R/C53e
TRANSFORMER
Rinnai Water Heater Service Manual
28
100000098 Rev B
Wiring Diagram
R70e, R/C85e(PLUS)
TRANSFORMER
Rinnai Water Heater Service Manual
29
100000098 Rev B
Wiring Diagram
R/C53i(PLUS),
R/C85i(PLUS)
HEAT EXCHANGER
THERMISTOR
OUTGOING WATER
THERMISTOR
AIR TEMEPRATURE
THERMISTOR
TRANSFORMER
Rinnai Water Heater Service Manual
30
100000098 Rev B
Wiring Diagram
R/C98i(ASME),
R/C98e(ASME)
Rinnai Water Heater Service Manual
31
100000098 Rev B
Rinnai Water Heater Service Manual
32
F2
WR
R
BK
Y
W
FLAME ROD
E4
E3
GY
R
BL
Y
BR
W
W
W
P
Y
P
P
F1
E6
BL
R
F5
E1
P
MAIN SOLENOID VALVE SV0 BK
F6
SOLENOID VALVE 1 SV1 BL
BK
(SMALL)
F7
Y
SOLENOID VALVE 2 SV2 BK
(LARGE)
F4
POV
F3
OVERHEAT
SWITCH
MODULATING
SOLENOID VALVE
THERMAL FUSES
WATER FLOW
CONTROL DEVICE
E5
R
BL
BR
Y
GY
W
W
OUTGOING WATER
THERMISTOR
R
Y
BK
W
W
R
Y
BK
HEAT EXCHANGER
OUTGOING WATER
THERMISTOR
WATER FLOW QS
SENSOR
FM
FREEZE PROTECTION G
R
E2 OPTION
COMBUSTION FAN
D1
1
R
BK
Y
W
D
(CN10)
4
13
12
G
1
3
(CN4)
A
G/Y
BR
BL
(CN1)
B
(CN2)
1
O
F
F
1
GY
GY
1
2
3
4
5
6
Dip SW2
1
2
3
4
5
6
7
8
Dip SW1
MIN
MAX
C1
GND
1
3
G/Y
3
1
BK
W
B1
GY
GY
A1
W BK
C4
FUSE
(3A)
W
W
IG
WW
W
W
HOT
NEUTRAL
GROUND
AC120V
ANTI-FROST HEATER
W
W
GND
SPARK
ELECTRODE
REMOTE CONTROLLER
BK:Black
BR:Brown
R :Red
O :Orange
Y :Yellow
G :Green
BL:Blue
GY:Grey
W :White
P :Pink
COLOR CODING
FROST SENSING
SWITCH
BLBL
C5
ANTI-FROST HEATER
C3
IGNITER
BK
BK
Spare Parts Only
Gas pressure
MODULATING VALVE
CURRENT ADJUSTING
SURGE
PROTECTOR C
2
BL
BR
4
C 2
F
GND
1
Y BK
P R
BL P Y P
(CN3)
R Y R W Y
P BL BR BK W
(CN5)
E
Wiring Diagram
V53e, R63LSe
100000098 Rev B
Wiring Diagram
R50LSi, R63LSe2, R75LSe-VA,
R75LSi-VA, R94LSe-VA, R94LSi-VA
COLOR CODING
G1
BY-PASS SERVO MODEL ONLY
BR
O
Y
R
W
BY-PASS FLOW
CONTROL DEVICE
FREEZE PROTECTION
OPTION
WATER FLOW
SENSOR
F2
QS
R
Y
BK
for REU-EZC
(Optional)
G
R
F1
W Y O R BR
5
R
Y
BK
G
1
(CN7)
MAX
W
W
HEAT EXCHANGER
THERMISTOR
W
W
OUTGOING WATER
THERMISTOR
F7
W
W
F3
F4
F5
R BK
O
W
O
WATER FLOW
CONTROL DEVICE
W R BK
3
WW
Dip SW1
(CN9)
(CN5)
E
4
(CN12)
W
Y
BK
R
H
1
12
Y R
W BK
B
1
(CN2)
P P Y BR Y
R P
BK BL
F6
THERMAL FUSES
R
R
OVERHEAT
SWITCH
H1
B1
1
BK
BK
3
(CN1)
C
GY
GY
(CN3)
GND
D
D3
1
FROST SENSING
SWITCH
BL
BR
Y
H4
3
H5
MAIN SOLENOID VALVE
SV0
SOLENOID VALVE 1
SV1
SURGE
PROTECTOR
Y
BK
H7
SOLENOID VALVE 2
SV2
SOLENOID VALVE 3
SV3
BL BL
(W) (W)
P
BK
H6
BL
BR
BL
BK
H8
BR
BK
G/Y
D1
GND
Rinnai Water Heater Service Manual
1
3
3
1
33
W
W
D5
ANTI-FROST HEATER
D2
BK
W
D4
BL BL
FUSE
(3A)
G/Y
GND
SPARK
ELECTRODE
IG
IGNITER
(CN4)
H3
REMOTE CONTROLLER
C1
GY
GY
R
R
POV PP
FLAME ROD
Gas type
Spare Parts Only
1
2
3
4
5
6
O
F
F
FM
Gas pressure
Dip SW2
COMBUSTION FAN
MODULATING
SOLENOID VALVE
1
2
3
4
5
6
7
8
O
F
F
1
R Y
W
W
E1
A
1
P BL BR
W
P
F
GY
13
GY
R
BL
Y
BR
R
BL
BR
Y
GY
H2
MODULATING VALVE
CURRENT ADJUSTING
MIN
INDOOR MODEL ONLY
AIR TEMPERATURE
THERMISTOR
W :White
BK:Black
BR:Brown
R :Red
BL:Blue
Y :Yellow
P :Pink
O :Orange
G :Green
GY:Gray
W BK
ANTI-FROST HEATER
AC120V
HOT
NEUTRAL
GROUND
100000098 Rev B
Wiring Diagram
R75LSe-VB, R75LSi-VB,
R94LSe-VB, R94LSi-VB
FREEZE PROTECTION (OPTIONAL)
Rinnai Water Heater Service Manual
34
100000098 Rev B
Wiring Diagram
V53i
FREEZE PROTECTION (OPTIONAL)
Rinnai Water Heater Service Manual
35
100000098 Rev B
BR
O
Y
R
W
Rinnai Water Heater Service Manual
36
R
BL
BR
Y
GY
W
W
W
W
F4
GY
R
BL
Y
BR
W
W
W
P
R
W
H1
F6
MODULATING
SOLENOID VALVE
H3
P
MAIN SOLENOID VALVE SV0 BK
H4
SOLENOID VALVE 1 SV1 R
BK
(CENTER)
H5
SOLENOID VALVE 2 SV2 O
BK
(LEFT)
H6
SOLENOID VALVE 3 SV3 Y
BK
(RIGHT)
OVERHEAT
SWITCH R R
THERMAL FUSES
W
E1
Y
COMBUSTION FAN FM BK
R
WATER FLOW
CONTROL DEVICE
F5
OUTGOING WATER
WATER THERMISTOR
HEAT EXCHANGER
WATER THERMISTOR
F3
FREEZE PROTECTION G
R
(OPTIONAL)
F1
F2
R
R
WATER FLOW
Y
Y
QS BK BK
SENSOR
BY-PASS FLOW
CONTROL DEVICE
G1
POV
H2
R
W
O
O
13
RBK
1
WY ORBR
E
1
Y R
W BK
4
(CN2)
H
(CN9)
3
A
1
H7
Y
1
2
3
4
5
6
7
8
GY
GY
1
3
1
BK
W
(CN4)
1
3
1
2
3
4
5
6
GND
G/Y
D
C
(CN1)
B
O
F
F
Dip SW2
O
F
F
Dip SW1
MIN
MAX
(CN3)
1
WRBK
O P R Y Y
W O
BK O
12
(CN5)
1
FLAME ROD
(CN12)
R Y
G
(CN7)
GY F
P BL BR WW
5
GY
GY
GND
SURGE
PROTECTOR
W BK D1
G/Y
GND
1
1
IG
SPARK
ELECTRODE
REMOTE CONTROLLER
W BK D2
IGNITER
B1
C1
BK
BK
Gas type
Spare Parts Only
Gas pressure
MODULATING VALVE
CURRENT ADJUSTING
A1
for REU-EZC
(Optional)
W BK
FUSE
(3A)
W
W
D3
D6
D5
D4
AC120V
W
W
W
W
W
W
W
W
W
ANTI-FROST
HEATER
FROST SENSING
SWITCH
HOT
NEUTRAL
GROUND
W
W
WW
BL BL
W :White
BK:Black
BR:Brown
R :Red
BL:Blue
Y :Yellow
P :Pink
O :Orange
G :Green
GY:Gray
COLOR CODING
Wiring Diagram
R98LSe(ASME),
R98LSi(ASME)
100000098 Rev B
Wiring Diagram
RC80HPe, RC80HPi
Gy
Br
O
Y
W
P
B
R
G1
Br
O
Y
R
W
BY-PASS FLOW
CONTROL DEVICE
WATER FLOW
SENSOR
R
Y
Bk
QS
Br
O
Y
R
W
R
Y
Bk
E5
E7
FREEZE PROTECTION R
(OPTIONAL)
W
E4
E3
FM
FF MODEL ONLY OVERHEAT
SWITCH
E6
W
Bk
Bk
W
Bk
Bk
B3
SOLENOID SV3 Bk
R
VALVE 3
B4
SOLENOID
Bk
VALVE 4 SV4 O
Bk
R
R
O
W
Y
Bk
R
W
Y
Bk
R
4
1
E1
RR
L
BWW
Gr W Y
3 (CN9) 1
I
B
B
Y
Y
Bk
Bk
Spare parts only
B8
Y
R
R
B
W
W
(CN2)
Y
R
FF MODEL ONLY
FLAME ROD1
FLAME ROD2
M1
M
Y
3 (CN13) 1
Temperature
Controller
Bk
1
Bk
O Bk Y O
OP B R
A
A1
1
3
(CN1)
(CN4)
O
O
Rinnai Water Heater Service Manual
Gas Type
→ ON
D
3
1
2
C
IG
Gy
Gy
IGNITER
Gr/Y
Bk
W
GND
W
W
C5
D1
Gy
Gy
(CN3)
1
P
W :White
Bk:Black
Br:Brown
R :Red
B :Blue
Y :Yellow
P :Pink
O :Orange
Gr:Green
Gy:Gray
Pu:Purple
} Gas pressure setting
Dip SW2
1
2
3
4
5
6
SHORT
13
O
O
→ ON
W MODEL ONLY
B1
WW
1
2
3
4
5
6
7
8
(CN12)
O
P
REU-EZC (OPTIONAL)
Dip SW1
R O (CN5) 1
O
14
W
Y
Bk
R
B5
MAIN SOLENOID
P
SV0 Bk
VALVE
B6
SOLENOID SV1 B
Bk
VALVE 1
B7
SOLENOID
Y
VALVE 2 SV2 Bk
W
R
Bk
MAX MODULATING VALVE
E
R
Bk
P
GND
THERMAL FUSES
MODULATING
B2
SOLENOID VALVE
POV
REU-MSA (OPTIONAL)
MIN CURRENT ADJUSTING
R
OVERHEAT
SWITCH
R
1
(CN11)
R
W Bk
L1
COMBUSTION FAN
11
P
P
W
Gr
WATER LEVEL ELECTRODE
S-BMS/AIR
HANDLER (OPTIONAL)
1
(CN7)
W
W
BURNER
FF MODEL ONLY THERMISTOR
W
Bk
R
COLOUR CODING
12
E2
HEAT EXCHANGER
THERMISTOR
G2
WATER FLOW
CONTROL DEVICE
G
W
W
B
B
W
W
W
W
OUTGOING WATER
THERMISTOR
Br O R Br P W
R Y Bk Y R B
Gy
Br
O
Y
W
P
B
R
SPARK
ELECTRODE
SURGE
PROTECTOR C2
Bk 1
3 W
1 W
W 3
C1
Gr/Y
FUSE
(7A)
ANTI-FROST
HEATER
C6
ANTI-FROST
HEATER
C7
Bk W
C3
Bk W
FROST SENSING
SWITCH
ANTI-FROST
C 4 HEATER
FF MODEL
ONLY
ANTI-FROST
HEATER
Gr
GND
AC120V 60Hz
GND
37
100000098 Rev B
Wiring Diagram
RC98HPe, RC98HPi
Rinnai Water Heater Service Manual
38
100000098 Rev B
Flushing the Heat Exchanger
An “LC” or “00” error code indicates the unit is beginning to lime up and must be flushed. Failure to flush the
appliance will cause damage to the heat exchanger. Damage caused by lime build-up is not covered by the unit’s
warranty. After flushing, reset the LC fault code by turning off the power to the unit and turning the power back
on.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
13.
KEY
Disconnect electrical power to the water heater.
Close the shutoff valves on both the hot water and
cold water lines (V3 and V4).
Connect pump outlet hose (H1) to the cold water line
at service valve (V2).
Connect drain hose (H3) to service valve (V1).
Pour 4 gallons of undiluted virgin, food grade, white
vinegar into pail.
Place the drain hose (H3) and the hose (H2) to the
pump inlet into the cleaning solution.
Open both service valves (V1 and V2) on the hot
water and cold water lines.
Operate the pump and allow the cleaning solution to
circulate through the water heater for at least 1 hour
at a rate of 4 gallons per minute (15.1 liters per
minute).
Turn off the pump.
Rinse the cleaning solution from the water heater as
follows:
a. Remove the free end of the drain hose (H3) from
the pail. Place in sink or outside to drain.
b. Close service valve, (V2), and open shutoff valve,
(V4). Do not open shutoff valve, (V3).
c. Allow water to flow through the water heater for 5
minutes.
d. Close shutoff valve (V4). When unit has finished
draining remove the in-line filter at the cold water
inlet and clean out any residue. Place filter back
into unit and open valve (V4).
e. Close service valve, (V1), and open shutoff valve,
(V3).
Disconnect all hoses.
Restore electrical power to the water heater.
Pressure Regulator
3/4" Ball Valve
Circulating Pump
3/4" Union
Check Valve
Boiler Drain Valve
Pressure Relief Valve
S
Solenoid Valve
Rinnai
Water Heater
In-line
Filter
V2
V1
H3
V4
V3
Hot
Water
Line
Cold
Water
Line
Gas
Supply
H2
H1
Circulating Pump
Rinnai Water Heater Service Manual
39
100000098 Rev B
Manual Draining of the Water Heater
WARNING
To avoid burns, wait until the equipment cools down before draining the water. The
water in the appliance will remain hot after it is turned off.
If the water heater is not going to be used during a period of
possible freezing weather, it is recommended that the water
inside the water heater be drained.
* Use a wrench or other tool to unscrew the
hot water drain plug.
2. Turn off the temperature controller.
3. Disconnect the power to the water heater.
4. Remove the drain caps on both isolation valves and open
both valves above the caps (blue and red valve handles).
-OR- Open hot water drain plug at the hot water outlet.
5. Remove water filter to drain the cold water.
6. For condensing models unscrew the water drain plug from
the drain line next to the hot water outlet and remove the
condensate trap drain plug. Allow to drain.
To resume normal operation:
1. Confirm that all water drain plugs are removed, that the
gas supply is turned off, and that all taps are closed.
2. For condensing models insert the condensate trap drain
plug and screw in the water drain plug.
3. Screw in the water filter in the cold water inlet.
4. Replace the drain caps and close both isolation valves. OR- Screw in the hot water drain plug.
5. Open the cold water supply and hot water valve.
6. Open a tap and confirm that water flows, and then close.
7. Turn on the power.
8. After confirming that the temperature controller is off, turn
on the gas supply.
9. Turn on the temperature controller.
Hot
water
outlet
Hot water
drain plug *
Cold
water
inlet
Hot water
outlet
Hot water
drain plug*
CONDENSING
1. Shut off cold water supply, hot water valve and gas supply.
NON-CONDENSING
To manually drain the water:
Condensate
trap drain plug
Water
drain
plug
Water
filter
Water
filter
Cold water
inlet
Running a low volume of water through the water heater to prevent freezing
If the temperature exceeds the ability of the water heater to freeze
protect itself, or if power is lost, the following steps may prevent the
water heater and external piping from freezing. (Units connected with
EZConnect™ should be drained to prevent freezing if not in use.)
ON!
1. Turn the water heater off.
2. Close the gas supply valve.
3. Turn on a hot water tap to flow water about 0.1 gal/min or where
the stream is about 0.2 inches thick.
HOT
COLD
0.1 gal/min or
about 0.2 inch
thick
When the water heater or external piping has frozen
1.
2.
3.
4.
Do not operate the water heater if it or the external piping is frozen.
Close the gas and water valves and turn off the power.
Wait until the water thaws. Check by opening the water supply valve.
Check the water heater and the piping for leaks.
Rinnai Water Heater Service Manual
40
100000098 Rev B
Component Replacement Instructions
Gas Control Assembly
R/C42e, R/C53e, V53e, R63LSe
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
3. Remove four screws securing the front panel. Remove front panel.
4. Move aside the ignition line by pulling it out from the clear plastic tubing. (Figure 1)
5. Remove the six screws that attach the gas manifold to the combustion chamber (part of the heat
exchanger assembly). (Figure 1)
6. Remove the three screws that attach the gas manifold to the gas valve. Pull out the gas manifold.
(Figure 1)
Figure 1
Ignition line
Six screws
Three screws
Cable tie
7. Remove the screw on the gas valve holding the cable tie.
8. Remove the 3 screws attaching the gas connection to the underneath side of the water heater.
(Figure 2)
Figure 2
Regulator screw access
Gas connection
attached with 3 screws
9. Pull the gas connection down to disconnect it from the gas control assembly.
10. Pull out the gas control assembly. Remove the wire harness from the 4 solenoids.
Rinnai Water Heater Service Manual
41
100000098 Rev B
Component Replacement Instructions
Gas Control Assembly
WARNING
R/C42e, R/C53e, V53e, R63LSe
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
11. Install the gas valve and attach the wire harness
to the 4 solenoids. (Figure 3)
Figure 3
black / yellow (large solenoid)
12. Install the gas connection with 3 screws.
black / blue (small solenoid)
SV0 black / pink
POV pink / pink
(connector not shown)
13. Replace the o-ring between the gas valve and
the gas connection.
Figure 4
14. Replace the two circular gaskets (included in kit)
in the gas valve. (Figure 4) Make sure that the
ribbed side faces toward the manifold and that
the flat side faces toward the gas valve.
Circular gaskets
15. Start the three screws that attach the gas
manifold to the gas valve. Tighten the six screws
that hold the gas manifold to the combustion
chamber. Finish tightening the three screws that
hold the gas manifold to the gas valve.
16. Attach ignition line.
17. Perform the Gas Pressure Setting Procedure.
Rinnai Water Heater Service Manual
42
100000098 Rev B
Component Replacement Instructions
Gas Control Assembly
R/C53i(PLUS), R70e, R/C85e(PLUS),
R/C85i(PLUS), R50LSi, R63LSe2, V53i,
R75LSe-VA, R75LSi-VA, R94LSe-VA, R94LSi-VA
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
3. Remove four screws securing the front panel. Remove front panel.
4. Indoor models only: Remove the temperature controller and bracket by sliding up and out of the slots. On the
V53i remove the status monitor from the bottom of the manifold (one screw).
5. Pull out wire harness connector at the gas manifold assembly. See Figure 1.
6. Move aside the ignition line by pulling it out from the clear plastic tubing.
7. Remove the six screws that attach the gas manifold to the combustion chamber (part of the heat exchanger
assembly).
8. Remove the three screws that attach the gas manifold to the gas valve. Pull out the gas manifold.
Ignition line
Six screws
Wire harness connector
PC Board (dip switches)
Three screws
Figure 1
9. Remove the four screws attaching the gas connection to the underneath side of the water heater. Figure 2.
Regulator screw access
Figure 2
Gas connection attached with 4 screws
10. Pull the gas connection down to disconnect it from the gas control assembly.
11. Pull out the gas control assembly. Remove the wire harness from the 4 solenoids.
WARNING
Failure to correctly assemble the components according to these instructions may result
in a gas leak or explosion.
12. Replace the O-ring (included in kit) where the assembly attaches to the gas connection. Make sure the old Oring is removed and discarded. Install the new gas control assembly.
Rinnai Water Heater Service Manual
43
100000098 Rev B
Component Replacement Instructions
Gas Control Assembly
R/C53i(PLUS), R70e, R/C85e(PLUS),
R/C85i(PLUS), R50LSi, R63LSe2, V53i,
R75LSe-VA, R75LSi-VA, R94LSe-VA, R94LSi-VA
12. Attach wire harness to the solenoids as shown in Figure 3 below.
R/C53i(PLUS), R70e, R/C85e(PLUS),
R/C85i(PLUS), R50LSi, R63LSe2,
R75LSe-VA, R75LSi-VA, R94LSe-VA,
R94LSi-VA
Figure 3
V53i
MAIN SOLENOID VALVE SV0
P
BK
MAIN SOLENOID VALVE
SOLENOID VALVE 1 SV1
Y
BK
SOLENOID VALVE 1
SOLENOID VALVE 2 SV2
BL
BK
SOLENOID VALVE 2
SOLENOID VALVE 3 SV3
BR
BK
SOLENOID VALVE 3
MODLATING SOLENOID VALVE
POV P
13. Remove old packing from gas manifold. Install the gas manifold using 2 new packings (included in kit)
between the manifold and the heat exchanger. (Figure 4).
14. Replace the two circular gaskets (included in kit) in the gas valve (Figure 5). Make sure that the ribbed side
faces toward the manifold and that the flat side faces toward the gas valve.
Upper packing
Lower packing
(U shaped)
Circular gaskets (from kit)
in gas valve
Figure 5
Figure 4
15. Start the three screws that attach the gas manifold to the gas valve. Tighten the six screws that hold the gas
manifold to the combustion chamber. Finish tightening the three screws that hold the gas manifold to the gas
valve.
16. Attach wiring harness connector (black & brown wires) to the gas manifold.
17. For indoor models only, install the temperature controller and bracket or for the V53i install the status
monitor.
18. Attach ignition line.
19. Perform the Gas Pressure Setting Procedure.
Rinnai Water Heater Service Manual
44
100000098 Rev B
Component Replacement Instructions
Gas Control Assembly
1. Turn off the gas supply.
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME)
Bracket screw
2. Turn off the 120 V power supply.
3. Remove four screws securing the front panel.
Remove front panel.
4. On indoor models, remove the bracket holding
the controller (1 screw). (Figure 1)
5. Move aside the ignition line by pulling it out from
the clear plastic tubing. (Figure 2)
6. Disconnect 3 solenoid harnesses from the bottom
of the manifold.
7. Remove the 5 screws that attach the gas
manifold to the combustion chamber (part of the
heat exchanger assembly). (Figure 2)
8. Remove the 2 screws that attach the gas
manifold to the gas valve. These screws are
machine screws and must be used at these
locations. (Figure 2)
Figure 1
(indoor models)
5 screws
(gas manifold)
2 machine screws
(gas valve)
9. Pull out the gas manifold and remove the
connector at the ignitor at the left side of the gas
manifold.
10. Remove the 3 screws attaching the gas
connection to the under side of the water heater.
(Figure 3)
11. Remove the screw attaching the gas valve to the
rear of the case. (Figure 2)
12. Pull the gas connection down to disconnect it
from the gas control assembly.
Figure 2
Water line
connections
Screw (gas
valve, step 11)
Regulator
screw
access
Figure 3
Rinnai Water Heater Service Manual
45
Gas connection
attached with 3 screws
100000098 Rev B
Component Replacement Instructions
Gas Control Assembly
WARNING
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME)
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
13. Pull out the gas control assembly. Remove the
wire harness from the 2 solenoids.
black / orange
14. Remove old o-ring from gas connection and
install new o-ring from kit.
15. Install the gas valve and attach the wire harness
to the 2 solenoids. (Figure 4)
orange / orange
Figure 4
16. Install the gas connection with 3 screws.
17. Replace the circular gasket (included in kit) in the
gas valve. (Figure 5) Make sure that the ribbed
side faces toward the manifold and that the flat
side faces toward the gas valve.
Gasket
18. Reconnect gray/gray harness to ignitor module
before installing manifold.
19. Remove old packing from manifold and install
new packing.
20. Start the 2 screws that attach the gas manifold to
the gas valve. Tighten the 5 screws that hold the
gas manifold to the combustion chamber. Finish
tightening the 2 screws that hold the gas manifold
to the gas valve.
Figure 5
21. Install screw attaching the gas valve to the back
of the cabinet.
22. Install he 3 solenoid valve harness to the
manifold.
23. Attach ignition line.
24. On indoor models, install the bracket with the
controller.
25. Perform the Gas Pressure Setting Procedure.
Rinnai Water Heater Service Manual
46
100000098 Rev B
Component Replacement Instructions
RC80HPi, RC80HPe,
R75LSe-VB, R75LSi-VB, R94LSe-VB, R94LSi-VB
Gas Control Assembly
1. Turn off gas supply.
Flame rods
2. Turn off water supply.
3. Turn off 120v power supply.
4. Remove four screws securing the front panel.
Remove front panel.
Remove controller assembly (indoor model only)
5. RC80HPi: Remove temperature controller.
Remove two screws for temperature controller
bracket. Remove bracket.
VB Models: Slide controller bracket up and out of
the slots on the cabinet.
Remove gas manifold and gas valve
6. Disconnect high tension cord from ignitor.
7. Disconnect flame rod wires. (yellow and red)
8. Remove six pan head screws from manifold (six
screws outer edge) and three machine screws, at
bottom of manifold, to gas valve.
9. Disconnect ignitor module harness, mounted on
manifold. (gray/gray)
Ignitor
10. Disconnect the two solenoid wire harnesses at
bottom of manifold. Remove manifold plate.
17. Remove old packing from gas manifold. Install
new packing from kit to the manifold plate.
11. Remove the four screws attaching the gas
connection to the bottom side of water heater.
18. Reconnect two solenoid wire harnesses to
manifold.
12. Pull the gas connection down to disconnect it from
the gas control assembly.
19. Reconnect ignitor module harness.
13. Pull out the gas control assembly. Remove the
three solenoid wire harnesses.
20. Start the three screws that attach the gas manifold
to the gas valve. Install and tighten the six screws
that hold the gas manifold to the combustion
chamber. Tighten the three screws that hold the
gas manifold to the gas valve.
WARNING
Failure to correctly assemble the components
according to these instructions may result in a gas
leak or explosion.
21. Reconnect high tension cord to ignitor.
22. Reconnect flame rod wires. (yellow and red)
Install gas valve and gas manifold
Install temperature controller assembly (indoor
model only)
14. Install the gas control assembly and connect the
wire harness to the three solenoids.
23. RC80HPi: Install temperature controller bracket
with two screws. Install temperature controller.
VB Models: Slide controller bracket into the slots
on the cabinet.
15. Discard o-ring from gas connection. Install new
o-ring from kit. Install the gas connection with four
screws.
16. Replace the circular gaskets (included in kit) in the
gas valve. Ensure that the ribbed side faces
outward.
Rinnai Water Heater Service Manual
Manifold
Testing and close up
24. After calibrating the low and high gas pressure
settings, install the front panel using four screws.
47
100000098 Rev B
Component Replacement Instructions
Gas Control Assembly
RC98HPi, RC98HPe
1. Turn off gas supply.
2. Turn off water supply.
3. Turn off 120v power supply.
4. Remove four screws securing the front panel.
Remove front panel.
Remove controller assembly (indoor model only)
5. Remove temperature controller. Remove two
screws for temperature controller bracket. Remove
bracket.
Remove gas manifold and gas valve
6. Disconnect high tension cord from electrode.
Remove one screw for electrode bracket. Remove
bracket from manifold.
7. Disconnect flame rod wires. (yellow and red)
8. Remove seven pan head screws from manifold (six
screws outer edge, one screw in middle) and three
machine screws, at bottom of manifold, to gas
valve.
Manifold
9. Disconnect the four solenoid wire harnesses at
bottom of manifold. Remove manifold plate.
18. Connect the four solenoid wire harnesses at the
bottom of the manifold. Install electrode bracket
with one screw to gas manifold. Connect high
tension cord to electrode.
10. Remove the three screws attaching the gas
connection to the bottom side of water heater.
11. Pull the gas connection down to disconnect it from
the gas control assembly.
Install temperature controller assembly (indoor
model only)
12. Pull out the gas control assembly. Remove the two
solenoid wire harnesses.
19. Install temperature controller bracket with two
screws. Install temperature controller.
Install gas valve and gas manifold
Testing and close up
13. Install the gas control assembly and connect the
wire harness to the two solenoids.
20. After calibrating the low and high gas pressure
settings (see next page), install the front panel
using four screws.
14. Install the gas connection with three screws.
15. Replace the circular gasket (included in kit) in the
gas valve. Ensure that the ribbed side faces
outward.
16. Remove packing from manifold. Install new packing
from kit to the gas manifold.
17. Start the three screws that attach the gas manifold
to the gas valve. Install and tighten the seven
screws that hold the gas manifold to the combustion
chamber. Tighten the three screws that hold the gas
manifold to the gas valve.
Rinnai Water Heater Service Manual
48
100000098 Rev B
Component Replacement Instructions
Fan
1. Turn off the gas supply.
R/C42e, R/C53e, V53e, R63LSe
Figure 1
2. Turn off the 120 V power supply.
3. Turn off the water supply.
4. Remove four screws securing the front panel.
Remove front panel.
5. On the V53e and R63LSe, remove the screws
(3) holding the bracket with the surge protector.
(Figure 1)
6. Disconnect the wire harness at the fan
assembly. (Figure 2)
7. On the V53e and R63LSe, remove the screw
attaching the bracket with the ignitor to the
bottom of the burner case. (Figure 2)
2 screws at bottom
8. Remove the three screws attaching the fan sub
-assembly to the fan casing. (Figure 3)
1 screw
9. Pull out the fan sub-assembly.
10. Install the new fan sub-assembly and tighten
with three screws.
Figure 2
11. On the V53e and R63LSe, install the bracket
with the ignitor with one screw.
12. Attach the wire harness to the fan assembly
(white, yellow, black, red wires).
13. On the V53e and R63LSe, install the bracket
with the surge protector with three screws.
14. Install front panel using 4 screws.
15. Turn on water supply, power supply, and gas
supply.
Wire Harness Connector
Figure 3
3 screws
Rinnai Water Heater Service Manual
49
100000098 Rev B
Component Replacement Instructions
R70e, R/C85e(PLUS), R63LSe2,
R75LSe, R94LSe
Fan
1. Turn off the gas supply.
2. Turn off the 120 V power supply. (The fan may be damaged if it is removed with power still applied.)
3. Turn off the water supply.
4. For VB models, remove the screw covers by pressing them down and sliding them off horizontally.
5. Remove four screws securing the front panel. Remove front panel.
6. For V and VA models, disconnect wire harness at the fan assembly. For VB models disconnect wire harness
at the Molex connector.
7. For V and VA models, pull out the harness attached to the solenoid on the manifold to make room to pull out
the fan assembly.
8. Remove the two screws that attach the fan assembly to the bottom of the burner.
9. Pull out the fan assembly.
10. Install the fan assembly by inserting the tab on the fan assembly into the slot at the base of the heat
exchanger and attaching with two screws.
11. For V and VA models, attach the wire harness to the solenoid on the gas manifold (brown, black wires).
12. Attach the wire harness to the fan assembly (white, yellow, black, red wires).
13. Install front panel using 4 screws. For VB models, slide on screw covers.
14. Turn on water supply, power supply, and gas supply.
V and VA Models
VB Models
Two screws
attaching the
ignitor bracket
Two screws attaching the fan
Two screws
attaching the
fan
Solenoid on
the manifold
Wire harness
connection
on the fan
assembly
Wire
harness
Molex
connection
Rinnai Water Heater Service Manual
50
100000098 Rev B
Component Replacement Instructions
Fan
R/C53i(PLUS), R/C85i(PLUS), R50LSi,
V53i, R75LSi, R94LSi
1. Turn off the gas supply.
2. Turn off the 120 V power supply. (The fan may be damaged if it is removed with power still applied.)
3. Turn off the water supply.
4. For VB models, remove the screw covers by pressing them down and sliding them off horizontally.
5. Remove four screws securing the front panel. Remove front panel.
6. For VB models, remove the controller bracket.
7. For V and VA models, disconnect wire harness at the fan assembly. For VB models disconnect wire harness
at the Molex connector.
8. For V and VA models, pull out the harness attached to the solenoid on the manifold to make room to pull out
the fan assembly.
9. Remove the air temperature thermistor (two white wires) at the connection with the (white and orange wires
on VA models) / (white and yellow wires on VB models) within the wire bundle.
10. Loosen the ducting from the fan assembly by pinching open the metal clamp.
11. Remove the two screws that attach the fan assembly to the bottom of the burner.
12. Pull out the fan assembly.
13. Install the fan assembly by inserting the tab on the fan assembly into the slot at the base of the heat exchanger and attaching with two screws.
14. Push ducting over fan assembly inlet and secure with metal clamp.
15. For V and VA models, attach the wire harness to the solenoid on the gas manifold (brown, black wires).
16. Attach the wire harness to the fan assembly (white, yellow, black, red wires).
17. Attach the air temperature thermistor (O/W on VA models; O/Y on VB models).
18. For VB models, install the controller bracket.
19. Install front panel using 4 screws. For VB models, slide on screw covers.
20. Turn on water supply, power supply, and gas supply.
V and VA Models
VB Models
2 screws
2 screws
Solenoid
on the
manifold
Ducting and
metal clamp
Wire
harness
connection
Wire
harness
Molex
connection
Metal
clamp
Rinnai Water Heater Service Manual
Thermistor
Molex
connection
51
100000098 Rev B
Component Replacement Instructions
Fan
1. Turn off the gas supply.
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME)
Bracket screw
2. Turn off the 120 V power supply.
3. Turn off the water supply.
4. Remove four screws securing the front panel.
Remove front panel.
5. On indoor models, remove the bracket holding
the controller (1 screw). (Figure 1)
6. Disconnect the wire harness at the fan
assembly. (Figure 2)
7. Remove the three screws attaching the fan
motor to the fan casing. (Figure 2)
Figure 1
(indoor models)
8. Pull out the fan motor.
9. Install the new fan motor and tighten with three
screws.
10. Attach the wire harness to the fan assembly
(white, yellow, black, red wires).
11. On indoor models, install the bracket with the
remote controller.
12. Install front panel using 4 screws.
13. Turn on water supply, power supply, and gas
supply.
Wire Harness Connector
3 screws
Figure 2
Rinnai Water Heater Service Manual
52
100000098 Rev B
Component Replacement Instructions
RC80HPe, RC80HPi
Fan
RC98HPe, RC98HPi
1. Turn off gas supply.
1. Turn off gas supply.
2. Turn off water supply.
2. Turn off water supply.
3. Turn off 120v power supply.
3. Turn off 120v power supply.
4. (Indoor model only) Remove temperature
controller. Remove two screws for temperature
controller bracket. Remove bracket.
4. (Indoor model only) Remove temperature
controller. Remove two screws for temperature
controller bracket. Remove bracket.
5. Disconnect fan harness connector (white, yellow,
black, red).
5. Disconnect high tension cord from electrode.
Remove one screw for electrode module bracket.
Remove electrode bracket from gas manifold.
6. Remove two screws at top of fan assembly.
6. Disconnect fan harness connector (white, yellow,
black red).
7. Remove fan assembly.
8. Install new fan assembly.
9. Reinstall two screws at top of fan assembly.
7. Remove three screws and lock washers to fan
motor.
10. Reconnect fan harness connector (white, yellow,
black, red).
8. Remove fan motor from housing between the
copper pipes.
11. (Indoor model only) Reinstall temperature
controller bracket with two screws. Install
temperature controller in bracket.
9. Install fan motor. Ensure fan motor is clocked
correctly for harness connector.
10. Reinstall three screws and lock washers to fan
motor.
12. Turn on 120v power. Turn on water supply. Turn
on gas supply.
11. Reinstall electrode module bracket to gas
manifold with one screw. Install high tension cord
to electrode.
12. (Indoor model only) Reinstall temperature
controller bracket with two screws. Install
temperature controller in bracket.
2 screws
13. Turn on 120v power. Turn on water supply. Turn
on gas supply.
Fan Motor
Rinnai Water Heater Service Manual
53
100000098 Rev B
Component Replacement Instructions
PC Board
R/C42e, R/C53e
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
Figure 1
3. Turn off the water supply.
Screw
4. Remove four screws securing the front panel.
Remove front panel.
5. Lift up the plastic guard covering the front of the PC
board.
Potentiometer
6. Remove the controller connections.
7. Remove the screws securing the grounding cables.
8. If a surge protector with terminals is installed, then
remove this board by removing two screws. This
board should be re-installed on the replacement PC
board.
SW1
SW2
9. Remove the two screws at the top and bottom of the
PC board.
10. Pull out the PC board, remove plastic cover, and
remove the connections.
11. Adjust dip switches on the new PC board.
Switches 1-8 (SW1): Configure the dip switches the
same as on the original PC board. If necessary,
refer to the Dip Switch section or to the Operation
and Installation Manual for more information on
these dip switches.
Switches 1-4 (SW2): Configure according to the
table.
Surge protector
board with
terminals
SW2 setup
1
Burner test point
OFF - Propane Gas
ON - Natural Gas
OFF position for models prior to these serial
numbers: (on these units, the front panel
does not have an “R” or “C” trade name,
unless the front panel has been replaced)
2
V1616W, V1616WC
V2020W, V2020WC
V2532W, V2532WC
V2532FFU, V2532FFUC
V2520FFU, V2520FFUC
V2526W
Screw
06.02-000001
05.07-000001
05.05-117257
05.05-117257
05.05-109539
05.05-110434
Grounding cables
12. Attach connections and plastic cover.
ON position for other models, serial numbers
13. Insert PC board and attach with two screws.
14. Attach the grounding cables with screws.
3
OFF position
4
OFF - Residential Models
ON - Commercial Models
Rinnai Water Heater Service Manual
15. Attach connections for the controller.
16. Perform the Gas Pressure Setting Procedure.
54
100000098 Rev B
Component Replacement Instructions
PC Board
V53e, R63LSe
1. Turn off the gas supply.
Screw
Figure 1
2. Turn off the 120 V power supply.
3. Turn off the water supply.
Potentiometer
4. Remove four screws securing the front panel.
Remove front panel.
5. Remove the screw connecting the PC board to the
back of the water heater casing.
6. Remove the ground wire at the bottom of the
cabinet.
SW1
7. Pull out the PC board and remove the connections.
8. Adjust dip switches on the new PC board.
Replacement PC boards have an additional bank of
6 dip switches. Adjust as follows:
SW2
Switches 1-8 (SW1): Configure the dip switches the
same as on the original PC board. If necessary,
refer to the Dip Switch section or to the Operation
and Installation Manual for more information on
these dip switches.
Burner test point
Switches 1-6 (SW2): Configure according to the
diagrams below based on your model and gas
type.
9. Attach connections and insert PC board. Insert the
tab on the PC board into the hole in the bottom of
the case. Attach with one screw.
10. Perform the Gas Pressure Setting Procedure.
SW2 setup for V53e
SW2 setup for R63LSe
Propane (LPG) Natural Gas (NG)
Propane (LPG) Natural Gas (NG)
Switch No.
Switch No.
ON
O
F
F
Rinnai Water Heater Service Manual
Switch No.
ON
O
F
F
1
2
3
Switch No.
ON
1
2
3
O
F
F
ON
1
2
3
O
F
F
1
2
3
4
4
4
4
5
6
5
6
5
5
6
6
55
100000098 Rev B
Component Replacement Instructions
PC Board
1. Turn off the gas supply.
R/C53i(PLUS), R70e, R/C85e(PLUS), R/C85i(PLUS), R50LSi,
R63LSe2, V53i, R75LSe, R75LSi, R94LSe, R94LSi,
RC80HPe, RC80HPi, RC98HPe, RC98HPi
2. Turn off the 120 V power supply.
3. Turn off the water supply.
Figure 1
4. Remove four screws securing the front panel.
Remove front panel.
Screw
5. Lift up the plastic guard covering the front of the PC
board.
6. Remove the controller connections and the two
ground wires at the bottom of the cabinet.
7. If a surge protector with terminals is installed, then
remove this board by removing two screws. This
board should be re-installed on the replacement PC
board.
Remote controller
terminals
(NOT for 120 V power)
8. Remove the two screws at the top and bottom of the
PC board.
If these 2 terminals are
present then this is a
surge protector board
with terminals to
connect freeze
protection solenoid
valves and should be
installed with the new
PC board.
9. Pull out the PC board, remove plastic cover, and
remove the connections.
10. Adjust dip switches on the new PC board.
Switches 1-8 (SW1): Configure the dip switches the
same as on the original PC board. If necessary,
refer to the Dip Switch section or to the Operation
and Installation Manual for more information on
these dip switches.
V Series (R70e, R/C85e, R/C53i, R/C85i)
Switches 1-4 (SW2): Configure according to the
table.
Attached with 2 screws
Screw
VA and VB Series (R50LSi, R63LSe2, R75LSe,
R94LSe, R75LSi, R94LSi)
Switches 1-6 (SW2):
SW2 setup for V Series
(R70e, R/C85e, R/C53i, R/C85i)
Replacement PC boards for the VA and VB series
have an additional bank of 6 dip switches.
Configure according to the diagrams based on your
model and gas type. NOTE: The V53i
(VB2020FFU) does not have the SW2 dip switch.
1
OFF position for models prior to these serial
numbers: (on these units, the front panel
does not have an “R” or “C” trade name,
unless the front panel has been replaced)
11. Attach connections and plastic cover.
12. Insert PC board and attach with two screws.
2
13. If a surge protector with terminals was installed on
the original PC board, remove it and install it on the
new PC board. See Figure 1.
14. Attach connections for the remote controller.
V1616W, V1616WC
V2020W, V2020WC
V2532W, V2532WC
V2532FFU, V2532FFUC
V2520FFU, V2520FFUC
V2526W
06.02-000001
05.07-000001
05.05-117257
05.05-117257
05.05-109539
05.05-110434
ON position for other models, serial numbers
15. Attach plastic guard.
3
OFF position
4
OFF - Residential Models
ON - Commercial Models
16. Install two ground wires at the bottom of the cabinet.
17. Perform the Gas Pressure Setting Procedure.
Rinnai Water Heater Service Manual
OFF - Propane Gas
ON - Natural Gas
56
100000098 Rev B
Component Replacement Instructions
PC Board
R/C53i(PLUS), R70e, R/C85e(PLUS), R/C85i(PLUS), R50LSi,
R63LSe2, V53i, R75LSe, R75LSi, R94LSe, R94LSi
RC80HPe, RC80HPi, RC98HPe, RC98HPi
Note carefully the full model number of the unit.
NOTE: The V53i (VB2020FFU) does not have the SW2 dip switch.
SW2
Bank of
6
R50LSi
REU-VA2019FFUD-US
R50LSi
REU-VA2019FFUD-UC
R75LSi
REU-VA2528FFUD-US
REU-VA2528FFUD(A)-US
R75LSe
REU-VA2528WD-US
REU-VA2528WD(A)-US
NG
LPG
NG
LPG
NG
LPG
NG
LPG
1
ON
OFF
ON
OFF
ON
OFF
OFF
ON
2
ON
ON
ON
ON
ON
ON
OFF
OFF
3
ON
ON
ON
ON
OFF
OFF
OFF
OFF
4
ON
ON
OFF
OFF
ON
ON
ON
ON
5
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
6
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
SW2
Bank
of 6
R94LSi
REU-VA2535FFUD-US
REU-VA2535FFUD-UC
REU-VB2735FFUD-US
R94LSe
REU-VA2535WD-US
REU-VA2535WD-UC
REU-VB2735WD-US
R75LSi
REU-VA2528FFUD-UC
REU-VB2528FFUD-US
R75LSe
REU-VA2528WD-UC
REU-VB2528WD-US
R63LSe2
RUE-VA2024WD(A)-UC
NG
LPG
NG
LPG
NG
LPG
1
ON
OFF
ON
OFF
ON
OFF
2
ON
ON
OFF
OFF
OFF
OFF
3
OFF
OFF
OFF
OFF
ON
ON
4
OFF
OFF
OFF
OFF
OFF
OFF
5
OFF
OFF
OFF
OFF
OFF
OFF
6
OFF
OFF
OFF
OFF
OFF
OFF
SW2
Bank of 6
RC98HPi
RC98HPe
RC80HPi
RC80HPe
NG
LPG
NG
LPG
NG
LPG
NG
LPG
1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
2
ON
ON
OFF
OFF
ON
ON
OFF
OFF
3
OFF
OFF
OFF
OFF
ON
ON
ON
ON
4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
5
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
6
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Rinnai Water Heater Service Manual
57
100000098 Rev B
Component Replacement Instructions
PC Board
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME)
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
Figure 1
3. Remove four screws securing the front panel.
Remove front panel.
Screw
Burner test point
4. Remove the 2 screws connecting the PC
board to the water heater casing.
Potentiometer
5. Pull out the PC board and remove the
connections.
6. Adjust dip switches on the new PC board.
SW1
7. Attach connections and insert PC board.
SW2
Switches 1-8 (SW1):
Configure the dip switches the same as on the
original PC board. If necessary, refer to the
Dip Switch section or to the Operation and
Installation Manual for more information on
these dip switches.
Surge
protector
Switches 1-4 (SW2) or Switches 1-6 (SW2):
Configure according to the diagrams based on
your model and gas type.
Screw
Attach with 2 screws.
8. Perform the Gas Pressure Setting Procedure.
SW2
Bank of 6
R98i
R98e
C98i
C98e
R98LSi
R98LSe
NG
LPG
NG
LPG
NG
LPG
NG
LPG
NG
LPG
NG
LPG
1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
OFF
OFF
3
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
4
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
5
6
Rinnai Water Heater Service Manual
NA
58
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
NOTICE
R/C42e, R/C53e
Due to design changes, the new valve may appear different than the installed valve in
color, size, and in the number of wires in the harness connections.
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
3. Turn off the water supply. Drain all water from the appliance.
4. Remove four screws securing the front panel. Remove front panel.
Remove the water flow assembly
5. Remove 2 screws and bracket at the water flow assembly. The bracket can be left on the water line.
Pull out the water line. (Figure 1)
Figure 1
2 screws and bracket
(water flow assembly)
6. Remove the 3 screws attaching the water inlet to the under side of the water heater.
(Figure 2).
Figure 2
Water inlet
Rinnai Water Heater Service Manual
59
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
R/C42e, R/C53e
7. Pull out the water flow servo assembly and disconnect the cable harnesses. (Figure 3)
A. water flow sensor harness (black/yellow/red wires)
B. water flow servo harness (red/blue/brown/yellow/gray or red/blue/brown/orange/yellow/gray
wires)
C. heating element
Figure 3
heating element
connector
water flow servo
connector
water flow sensor
connector
Assemble
8. Place the new water flow assembly inside the water heater and attach the cable harnesses.
9. Replace the O-ring on the water inlet (included in kit). Attach the water flow assembly through the
bottom of the compartment to the water inlet using 3 screws. The shorter screw can be installed first
to connect the water flow assembly to the bottom of the compartment. Then install the 2 longer
screws through the water inlet.
10. Replace the O-ring on the water line (included in kit). Attach the water line to the water flow
assembly with 2 screws and bracket.
11. Install the front panel using 4 screws. Turn on the water supply, power supply, and gas supply.
12. Open a hot water tap and ensure there are no leaks at the water heater.
Rinnai Water Heater Service Manual
60
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
V53e, R63LSe
1. Turn off the gas supply.
2. Disconnect the 120 V power supply.
3. Turn off the water supply. Drain all water from the appliance.
4. Remove four screws securing the front panel. Remove front panel.
Remove the water flow assembly
5. Remove the bracket holding the surge protector (one screw on top of the bracket and two from the bottom of
the cabinet.
6. Remove 2 screws and 1 bracket at the water flow assembly. Pull out the water line. (Figure 1)
Figure 1
bracket with surge
protector
2 screws and bracket
(water flow assembly)
7. Remove the 3 screws attaching the water inlet to the under side of the water heater. (Figure 2).
Figure 2
Water inlet
Rinnai Water Heater Service Manual
61
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
V53e, R63LSe
8. Pull out the water flow servo assembly and disconnect the cable harnesses. (Figure 3)
a. water flow sensor harness (black/yellow/red wires)
b. water flow servo harness (red/blue/brown/yellow/gray or red/blue/brown/orange/yellow/gray
wires) at the water flow assembly
c. heating element
Figure 3
water flow servo
harness
water flow sensor
harness
heating element
Assemble
9. Place the new water flow assembly inside the water heater and attach the cable harnesses.
10. Replace the O-ring on the water inlet (included in kit). (Figure 4) Attach the water flow assembly
through the bottom of the compartment to the water inlet using 3 screws. The shorter screw can be
installed first to connect the water flow assembly to the bottom of the compartment. Install the 2
longer screws through the water inlet.
O-ring
Figure 4
11. Replace the O-ring on the water line (included in kit). Attach the water line to the water flow
assembly with 2 screws and bracket.
12. Install the bracket with the surge protector.
13. Install the front panel using 4 screws.
14. Turn on the water supply, power supply, and gas supply.
15. Open a hot water tap and ensure there are no leaks at the water heater.
Rinnai Water Heater Service Manual
62
100000098 Rev B
Component Replacement Instructions
R/C53i, R70e, R50LSi, R63LSe2,
V53i, R75LSe, R75LSi
Water Flow Control Assembly
NOTICE
Due to design changes, the new valve may appear different than the installed valve in
color, size, and in the number of wires in the harness connections.
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
3. Turn off the water supply. Drain all water from the appliance.
4. (On VB models, remove the screw covers by pressing them down and sliding them off horizontally.)
Remove four screws securing the front panel. Remove front panel.
Remove the water flow assembly
5. Remove 1 screw and bracket at the water flow assembly. The bracket can be left on the water line.
Pull out the water line. (Figure 1)
6. Remove the controller bracket (on indoor models only).
Figure 1
1 screw and bracket
(water flow assembly)
7. Remove the 4 screws attaching the water inlet to the underneath side of the water heater.
(Figure 2).
Figure 2
Water inlet
Rinnai Water Heater Service Manual
63
100000098 Rev B
Component Replacement Instructions
R/C53i, R70e, R50LSi, R63LSe2,
V53i, R75LSe, R75LSi
Water Flow Control Assembly
8. Pull out the water flow servo assembly and disconnect the cable harnesses. (Figure 3)
A. water flow sensor harness (black/yellow/red wires)
B. water flow servo harness (red/blue/brown/yellow/gray or red/blue/brown/orange/yellow/gray wires)
C. heating element
D. For VB models remove the ceramic heater from the valve body
water flow servo connector
Figure 3
heating element
connector
water flow sensor
connector
Assemble
9. Place the new water flow assembly inside the water heater and attach the cable harnesses. For VB models,
re-install the ceramic heater.
10. Replace the O-ring on the water inlet (included in kit). Attach the water flow assembly through the bottom of
the compartment to the water inlet using 4 screws. The 2 shorter screws can be installed first to connect the
water flow assembly to the bottom of the compartment. Then install the 2 longer screws through the water
inlet.
11. Replace the O-ring on the water line (included in kit). Attach the water line to the water flow assembly with 1
screw and bracket.
12. Install the controller bracket (on indoor models only).
13. Install the front panel using 4 screws. (On VB models, slide on the screw covers.)
14. Turn on the water supply, power supply, and gas supply.
15. Open a hot water tap and ensure there are no leaks at the water heater.
Rinnai Water Heater Service Manual
64
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
NOTICE
R/C85e(PLUS), R/C85i(PLUS),
R94LSe, R94LSi
Due to design changes, the new valve may appear different than the installed valve in color, size,
and in the number of wires in the harness connections.
1. Turn off gas supply.
Figure 1
2. Turn off water supply. Drain all water from
appliance.
2 screws
Solenoid
on the
manifold
(V, VA
models)
3. Turn off 120v power supply.
4. (On VB models, remove screw covers.) Remove
four screws securing the front panel. Remove front
panel.
Remove controller assembly (indoor VB model only)
Wire
harness
connection
on the fan
assembly
5. Remove one screw from ignitor module bracket.
Remove bracket.
6. Remove temperature controller and bracket by
sliding up and out of slots on cabinet.
Remove ignitor module (outdoor VB model only)
7. Remove two screws from ignitor module bracket.
Remove bracket and module.
Ducting and
metal clamp
(indoor
models only)
Remove fan assembly (Figure 1)
8. Disconnect fan motor harness.
9. Disconnect air inlet thermistor harness. (indoor
model only)
Figure 2
10. Release the fan duct from the left side by pinching
open the metal clamp. (indoor model only)
11. Remove two screws that attach the fan assembly to
the bottom of the combustion chamber.
Water flow
servo assembly
connections
12. Remove fan assembly. On V and VA models,
remove the solenoid harness on the manifold to
make room to pull out the fan assembly.
Remove water flow servo valve and bypass valve
13. Remove two screws and brackets at the bypass
valve. Remove two copper tubes.
14. Remove two screws attaching the water inlet to the
bottom of the water heater cabinet. (Figure 3)
15. Remove two screws attaching the water flow servo
valve to the bottom of the water heater cabinet.
16. Disconnect the wire harnesses (water flow sensor
harness - black, yellow, red wires; bypass servo
assembly harness - white, red, yellow, orange,
brown wires; water flow servo valve harness - 5-8
multicolored wires depending on model). (Figure 4)
Figure 3
Water inlet
Rinnai Water Heater Service Manual
65
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
R/C85e(PLUS), R/C85i(PLUS),
R94LSe, R94LSi
17. For VB models only, remove one screw that is
securing ceramic heater. Remove ceramic heater
from water flow servo assembly.
Figure 4
18. Pull out the water flow servo assembly and bypass
servo assembly.
19. Remove two screws to separate the bypass servo
assembly from the water flow servo assembly.
(Figure 5)
water flow servo
connector
water flow servo
connector
Reinstall water flow servo valve and bypass valve
heating element
connector
20. Replace the O-ring (included in kit) between the
water flow servo assembly and the bypass servo
assembly. Attach the water flow servo assembly to
the bypass assembly with two screws.
water flow
sensor
21. Place inside the heater and attach the wire
harnesses.
22. For VB models only, reinstall ceramic heater.
23. Replace the O-ring on the water inlet (included in
kit). Attach the water flow assembly to the bottom of
the water heater cabinet using two short screws.
Then install the two longer screws through the water
inlet.
Figure 5
24. Replace the O-ring on the copper lines (included in
kit). Attach the two copper lines to the bypass valve,
with one bracket and one screw for each line.
Reinstall fan assembly
25. Reconnect fan motor harness.
26. Reconnect air inlet thermistor harness. (indoor
model only)
27. Reinstall the fan duct. (indoor model only)
28. Install two screws that attach the fan assembly to
the bottom of the combustion chamber.
Install controller assembly (indoor VB model only)
29. Reinstall temperature controller and bracket.
30. Reinstall ignitor module bracket with one screw.
Install ignitor module (outdoor VB model only)
31. Install bracket and ignitor module with two screws.
Close up
32. Turn on the water supply, power supply, and gas
supply.
33. Open hot water tap and ensure there are no leaks at
the water heater.
34. Install front panel using four screws. Reinstall
screw covers.
Rinnai Water Heater Service Manual
66
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
R/C98e(ASME), R/C98i(ASME),
R98LSe(ASME), R98LSi(ASME)
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
3. Turn off the water supply. Drain all water from the
appliance.
Water
lines
4. Remove four screws securing the front panel. Remove
front panel.
5. Remove 2 screws and 2 brackets at the water flow
servo assembly. Pull out the water lines. (Figure 1)
6. Disconnect the wiring harnesses from the water flow
sensor, heating element, water flow servo assembly,
and bypass servo assembly. (Figure 1)
7. Remove the 4 screws attaching the water inlet to the
underneath side of the water heater. (Figure 2)
Figure 1
Water flow
sensor
Heating
element
8. Pull out the water flow servo assembly and bypass
servo assembly. (Figure 3)
Water
inlet
9. Remove 2 screws in order to separate the bypass
servo assembly from the water flow servo assembly.
(Figure 3)
10. Replace the O-ring (included in kit) between the water
flow servo assembly and the bypass servo assembly.
Attach the new water flow servo assembly to the
bypass servo assembly with 2 screws.
11. Reconnect the wire harnesses (4).
Figure 2
12. Place inside the water heater.
13. Attach the water flow assembly to the water inlet using
4 screws. The 2 shorter screws can be installed first to
connect the water flow assembly to the bottom of the
compartment. Install the 2 longer screws through the
water inlet.
14. Replace the O-ring on the water lines (included in kit).
Attach the two water lines to the bypass servo
assembly with 1 screw each.
Bypass
servo
15. Install the front panel using 4 screws.
Wire harness
16. Turn on the water supply, power supply, and gas
supply.
17. Open a hot water tap and ensure there are no leaks at
the water heater.
Screws (2)
Water flow
servo
Figure 3
Rinnai Water Heater Service Manual
67
100000098 Rev B
Component Replacement Instructions
Water Flow Control Assembly
RC80HPe, RC80HPi,
RC98HPe, RC98HPi
1. Turn off gas supply.
Install controller assembly (indoor models only)
2. Turn off water supply. Drain all water from
appliance.
15. Install temperature controller bracket with two
screws. Install temperature controller.
3. Turn off 120v power supply.
16. Turn on the water supply, power supply, and gas
supply.
4. Remove four screws securing the front panel.
Remove front panel.
17. Open hot water tap and ensure there are no leaks
at the water heater.
Remove controller assembly (indoor models only)
18. Install front panel using four screws.
5. Remove temperature controller. Remove two
screws for temperature controller bracket. Remove
bracket.
Remove water flow servo valve
6. Remove two screws and brackets at the bypass
valve. Remove two copper tubes. (Figure 1).
7. Remove four screws attaching the water inlet to the
bottom of the water heater cabinet.
8. Disconnect the wire harnesses (water flow sensor
harness - black, yellow, red wires; bypass servo
assembly harness - white, red, yellow, orange,
brown wires, water flow servo valve harness - gray,
brown, orange, yellow, white, pink, blue, red).
Remove heating element.
9. Pull out the water flow servo assembly and bypass
servo assembly.
10. Remove two screws in order to separate the bypass
servo assembly from the water flow servo
assembly.
Reinstall water flow servo valve
Water flow servo
assembly connections
11. Replace the O-ring (included in kit) between the
water flow servo assembly and the bypass servo
assembly. Attach the new water flow servo
assembly to the bypass assembly with two screws.
12. Place inside the heater and attach the wire
harnesses. Install heating element.
13. Replace the O-ring on the water inlet (included in
kit). Attach the water flow assembly to the water
inlet using four screws. The two shorter screws can
be installed first to connect the water flow assembly
to the bottom of the cabinet. Then install the two
longer screws through the water inlet.
14. Replace the O-ring on the water lines (included in
kit). Attach the two water lines to the bypass valve,
with one bracket and one screw for each line.
Rinnai Water Heater Service Manual
68
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C42e, R/C53e, V53e, R63LSe
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
3. Turn off the water supply. Drain all water
from the appliance.
4. Remove four screws securing the front
panel. Remove front panel.
5. On the V53e and R63LSe, remove the
screws (3) holding the bracket with the
surge protector. (Figure 1)
6. Disconnect the wire harness at the fan
assembly. (Figure 2)
7. Remove screws and brackets securing the
water line connections. (Figure 1)
8. Remove the 3 screws that attach the gas
manifold to the gas valve. These screws
are machine screws and must be used at
these locations. (Figure 1)
9. Remove the 6 screws that attach the gas
manifold to the combustion chamber (part
of the heat exchanger assembly).
(Figure 1)
Figure 1
Water Connections
6 screws
(gas manifold)
Bracket
3 machine screws
(gas valve)
10. Pull out the gas manifold.
1 screw
Figure 2
Rinnai Water Heater Service Manual
69
Wire Harness Connector
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C42e, R/C53e, V53e, R63LSe
11. Remove the clips and screws (5 for the
V53e and R/C42; 6 for the R/C53 and
R63LSe) attaching the burner cover plate
to the combustion chamber. (Figure 3)
12. Remove the 2 screws attaching the burner
to the heat exchanger. Pull out the burner.
(Figure 3)
13. Disconnect wire harnesses:
A. Thermal fuse connectors (two) from
bundle near PCB (BK to RD and WT to
RD)
Figure 3
Screws attaching
burner
Figure 4
Top attachment screws
Figure 5
Bottom attachment screws
B. Disconnect overheat bimetal from
upper right heat exchanger.
Burner
cover plate
C. Heat exchanger thermistor connector
from bundle near PCB (WT/WT to WT/
PK)
D. Heating element connectors: water
flow servo assembly, hot water outlet,
heat exchanger heating elements (at
bottom left), frost sensing switch
(bottom center).
E. Ignitor harness in front of fan housing
(GY/GY)
14. Remove the 4 screws connecting the heat
exchanger to the casing. (Figures 4 and 5)
15. Pull out the assembly.
IMPORTANT: Take note of wire harness
routing prior to removal.
16. Remove overheat bimetal from upper right
heat exchanger. (one screw) Install on
new heat exchanger.
17. Remove thermistor and o ring from upper
left heat exchanger. (two screws, one clip)
Install thermistor and new o ring (in kit) on
new heat exchanger.
18. Remove thermal fuse harness and clips
from around heat exchanger. Install on
new heat exchanger and connect to
overheat bimetal connector.
19. Remove heating elements and clips from
heat exchanger. Install on new heat
exchanger.
20. Remove ignitor module and bracket from
bottom of combustion chamber.
Rinnai Water Heater Service Manual
70
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C42e, R/C53e, V53e, R63LSe
21. Remove the fan assembly (four screws) and install
on new heat exchanger.
22. Install ignitor module and bracket on new heat
exchanger.
23. Remove the flue outlet (seven screws) and install
on the new heat exchanger.
24. Install the largest O-ring (included in kit) over the
water outlet tube and the smaller O-ring (included
in kit) over the water inlet tube. (Figure 1)
Black
gaskets
25. Install the 4 screws at the top and bottom of the
heat exchanger to the casing. (Figures 4 and 5)
26. Insert the burner and place the burner cover plate
into position. Attach the burner cover plate first with
screws (5 for the V53e and R/C42; 6 for the R/C53
and R63LSe) and then attach the burner with 2
screws. (Figure 3)
27. Make sure that the black gaskets (Figure 6) are
intact on the gas control assembly. Make sure that
the ribbed side faces toward the manifold and that
the flat side faces toward the gas valve.
Figure 6
28. Attach the gas manifold with 3 machine screws at
the gas control assembly. (Figure 1)
29. Attach the gas manifold with 6 screws at heat
exchanger. (Figure 1)
30. Connect wire harnesses:
A. Thermal fuse connectors (two) from bundle
near PCB (BK to RD and WT to RD)
B. Heat exchanger thermistor connector from bundle near PCB (WT/WT to WT/PK)
C. Heating element connectors: water flow servo
assembly, hot water outlet, heat exchanger
heating elements (at bottom left), frost sensing
switch (bottom center).
D. Ignitor harness in front of fan housing (GY/GY).
31. Attach the wire harness to the fan assembly (white,
yellow, black, red wires).
32. Attach the brackets to the water line connections.
(Figure 1)
33. On the V53e and R63LSe, install the bracket with
the surge protector (3 screws). (Figure 1)
34. Install the front panel using 4 screws.
35. Turn on the water supply, power supply, and gas
supply.
Rinnai Water Heater Service Manual
71
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R70e, R/C85e(PLUS), R63LSe2,
R75LSe, R94LSe
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
3. Turn off the water supply. Drain all water
from the appliance.
Burner cover
plate
4. Remove four screws securing the front panel.
Remove front panel.
Gas Manifold
5. On VB models, remove one screw from
ignitor module bracket. Remove bracket.
PC Board
Gas Control
Valve
Fan Assembly
Remove Fan Assembly (Figure 2)
Figure 1
6. Disconnect wire harness at the fan assembly.
7. On V and VA models, pull out the harness
attached to the solenoid on the manifold to
make room to pull out the fan assembly.
2 screws
Solenoid
8. Remove the 2 screws that attach the fan
assembly to the bottom of the burner.
9. Pull out the fan assembly.
Wire
harness
connection
Figure 2
Disconnect Water Lines (Figure 3)
10. Remove 1 screw from the water outlet
bracket. Remove the bracket by rotating and
moving it up toward the bend in the tube
where the diameter is smaller.
11. For models with a bypass valve, remove 2
screws and 2 brackets at the bypass servo
assembly.
For models without a bypass valve,
remove 1 screw and 1 bracket at the water
flow servo assembly.
Figure 3
Water outlet
connection
Water flow servo
assembly connection
Disconnect PC Board (Figure 4)
12. Remove 1 screw connecting the PC
Board to the heat exchanger assembly.
Rinnai Water Heater Service Manual
72
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R70e, R/C85e(PLUS), R63LSe2,
R75LSe, R94LSe
Remove Gas Manifold (Figure 4)
13. Remove the 3 screws that attach the gas
manifold to the gas valve. These screws
are machine screws and must be used at
these locations.
Ignition line
6 screws (gas manifold)
14. Remove the 6 screws that attach the gas
manifold to the combustion chamber
(part of the heat exchanger assembly).
15. Pull out the ignition line and remove the
gas manifold.
16. On VB models, disconnect the two
solenoid harnesses form the manifold
(black/red and black/orange).
PC Board screw
3 machine screws
(gas valve)
Figure 4
8 screws
(burner cover plate)
Remove Burner and Burner Cover
Plate (Figure 5)
17. Remove the 8 screws attaching the burner cover
plate to the combustion chamber. Move the cover
plate to the side. It is not necessary to disconnect
the wire harness from the burner cover plate.
2 screws (burner)
Ignition line
connection
18. Remove the 2 screws attaching the burner to the
heat exchanger. Pull out the burner.
Figure 5
Disconnect Wire Harness Attachments and Screws Holding the Heat Exchanger
19. Disconnect the wire harnesses:
A. 1. Thermal fuse connector(s) from bundle near PCB (RD/RD to RD/RD) VB Models: (WT to RD and WT
to WT)
B. 2. Heat exchanger thermistor connector from bundle near PCB. (WT/WT to PK/WT) VB Models: (WT/WT
to PK/PK)
C. 3. Heating element connectors: water flow servo assembly, hot water outlet, heat exchanger heating
elements (at bottom), frost sensing switch (bottom center). NOTE: Some models do not have a
connector at water outlet or water flow servo heating elements and must be removed from the
assembly.
D. 4. Ignitor module harness (GY/GY) N/A for VB models
20. Remove 3 screws behind the fan. (Figure 6)
21. Remove 2 screws above the exhaust. Pull assembly from the unit. (Figure 7)
Figure 7
Figure 8
3 screws
2 screws
Rinnai Water Heater Service Manual
73
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
WARNING
R70e, R/C85e(PLUS), R63LSe2,
R75LSe, R94LSe
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
Installation
22. Install the largest O-ring (included in kit) over the water outlet tube and the two smaller O-rings (included in kit)
over the bypass servo tubes. (Figure 3)
23. Relocate water heater components:
Important: Take note of wire harness routing prior to removal.
A. Remove overheat bimetal from upper left heat exchanger. (one screw) Remove thermal fuse harness
and clips from around heat exchanger. Install bimetal and thermal fuse on new heat exchanger.
B. Remove thermistor and o ring from upper right heat exchanger. Install thermistor and new o ring (in kit)
on new heat exchanger.
C. Remove heating elements, sensor and clips from heat exchanger. Install on new heat exchanger.
D. Remove ignitor module from bottom of combustion chamber. Install on new heat exchanger.
24. Install the new heat exchanger using 2 screws above the exhaust and 3 screws behind the fan. (Figures 6, 7)
25. Connect wire harnesses:
A. Thermal fuse connector(s) from bundle near PCB (RD/RD to RD/RD) VB Models: (WT to RD and WT to
WT)
B. Heat exchanger thermistor connector from bundle near PCB. (WT/WT to PK/WT) VB Models: (WT/WT to
PK/PK)
C. Heating element connectors: water flow servo assembly, hot water outlet, heat exchanger heating elements (at bottom), frost sensing switch (bottom center). NOTE: Some models do not have a connector
at water outlet or water flow servo heating elements and must be reinstalled.
D. Ignitor module harness (GY/GY) N/A for VB models
26. (Figure 5) Replace the combustion chamber packing (included in kit) removing any residue from old packing.
Insert the burner and place the burner cover plate into position. Attach the burner cover plate first with 8
screws and then attach the burner with 2 screws.
Install Gas Manifold and Connect PC Board
27. Make sure that the two black packings (Figure 8) are intact on the gas control
assembly. Make sure that the ribbed side faces toward the manifold and that
the flat side faces toward the gas valve.Attach the gas manifold with 3 machine
screws at the gas control assembly. Replace the lower and upper packings
(included in kit) for the manifold plate removing any residue.
28. On VB models, connect the two solenoid harnesses from the manifold (black/
red and black/orange).
29. Attach the gas manifold with 6 screws at heat exchanger.
Figure 8
30. Attach the ignition line at the burner cover plate.
31. Attach the PC Board to the heat exchanger with 1 screw.
Rinnai Water Heater Service Manual
74
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R70e, R/C85e(PLUS), R63LSe2,
R75LSe, R94LSe
Connect Water Lines (Figure 3)
32. Attach the water outlet line and bracket with 1 screw.
33. Depending on model, attach the line to the water flow servo assembly with 1 screw and 1 bracket or attach the lines
to the bypass valve with 1 screws and 1 brackets for each line.
Install Fan Assembly (Figure 2)
34. Install the fan assembly by inserting the tab on the fan assembly into the slot at the base of the heat exchanger and
attaching with two screws.
35. Attach the wire harness to the solenoid on the gas manifold (brown, black wires).
36. Attach the wire harness to the fan assembly (white, yellow, black, red wires).
37. On VB models, install the ignitor module bracket with one screw.
38. Install the front panel using 4 screws. Turn on the water supply, power supply, and gas supply. Check for gas leaks.
Component Replacement Instructions
Heat Exchanger
R/C53i(PLUS), R/C85i(PLUS), V53i,
R50LSi, R75LSi, R94LSi
1.
Turn off the gas supply.
2.
Turn off the 120 V power supply.
3.
Turn off the water supply. Drain all water from the appliance.
4.
Remove four screws securing the front panel. Remove front
panel.
5.
On VB models except the VB2020, remove one screw from
ignitor module bracket. Remove bracket.
6.
Remove temperature controller and bracket by sliding up and
out of slots on cabinet. On the VB2020, remove one screw
from the status monitor assembly at the gas manifold.
Remove module.
Figure 1
Burner cover
plate
Gas Manifold
Remove Fan Assembly (Figure 2)
7.
Disconnect wire harness at the fan assembly. Disconnect the
air temperature thermistor (two white wires) at the connection
with the white and orange wires within the wire bundle.
PC Board
8.
On V and VA models and VB2020, pull out the harness
attached to the solenoid on the manifold to make room to pull
out the fan assembly.
Gas Control
Valve
9.
Remove the 2 screws that attach the fan assembly to the
bottom of the burner.
Fan Assembly
10. Loosen the ducting from the fan assembly by pinching open
the metal clamp. Pull out the fan assembly.
Disconnect Water Lines and PC Board (Figure 2)
11. Remove 1 screw from the water outlet bracket. Remove the bracket by rotating and moving it up toward the bend in the
tube where the diameter is smaller.
12. For models with a bypass valve, remove 2 screws and 2 brackets at the bypass servo assembly.
For models without a bypass valve, remove 1 screw and 1 bracket at the water flow servo assembly.
13. Remove 1 screw connecting the PC Board to the heat exchanger assembly.
2 screws
Figure 2
Ducting and
metal clamp
PC board screw
Solenoid on the manifold
Wire harness connection
on the fan assembly
water flow servo
assembly
connection
Wire harness bundle
(air temperature
thermistor connection to
orange / white wires)
Water outlet
connection
Rinnai Water Heater Service Manual
76
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C53i(PLUS), R/C85i(PLUS), V53i,
R50LSi, R75LSi, R94LSi
Figure 3
Remove Gas Manifold (Figure 3)
14. Remove the 3 screws that attach the
gas manifold to the gas valve. These
screws are machine screws and must
be used at these locations.
Ignition line
6 screws (gas manifold)
15. Remove the 6 screws that attach the
gas manifold to the combustion chamber
(part of the heat exchanger assembly).
16. Pull out the ignition line and remove the
gas manifold.
PC Board screw
17. On VB models except the VB 2020,
disconnect the two solenoid harnesses
from the manifold (black/red and black/
orange).
3 machine screws
(gas valve)
Remove Burner and Burner Cover Plate
(Figure 4)
Figure 4
8 screws
(burner cover plate)
18. Remove the 8 screws attaching the burner cover
plate to the combustion chamber. Move the cover
plate to the side. It is not necessary to disconnect
the wire harness from the burner cover plate.
2 screws (burner)
19. Remove the 2 screws attaching the burner to the
heat exchanger. Pull out the burner.
Pressure tube
20. Disconnect the pressure tube from the heat
exchanger.
Ignition line
connection
21. Disconnect wire harnesses:
A.
Thermal fuse connector(s) from bundle near PCB (RD/RD to RD/RD) VB Models: (WT to RD and WT to WT)
B.
Heat exchanger thermistor connector from bundle near PCB. (WT/WT to PK/WT) VB Models: (WT/WT to PK/PK)
C.
Heating element connectors: water flow servo assembly, hot water outlet, heat exchanger heating elements (at bottom), frost sensing switch (top left heat exchanger). NOTE: Some models do not have a connector at water outlet or
water flow servo heating elements and must be removed from the assembly.
D.
Ignitor module harness (GY/GY) N/A for VB models
E.
VB models only: Burner sensor from bundle near PCB. (BK/BK)
22. Remove 8 screws connecting the assembly to the water heater casing assembly. (Figures 6, 7)
Near fan assembly location
Figure 6
At right and left upper corners of water heater
2 screws
3 screws
Figure 7
2 screws
1 screw
Rinnai Water Heater Service Manual
77
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C53i(PLUS), R/C85i(PLUS), V53i,
R50LSi, R75LSi, R94LSi
23. Pull out the assembly. Remove 3 brackets on the side and back holding the fusible link.
24. Remove the 9 screws at the cover plate over the air intake passage. (Figure 8)
25. Remove the 4 screws attaching the heat exchanger to the air intake/exhaust assembly. (Figure 9)
Figure 8
Figure 9
9 screws
(cover plate)
4 screws
26. Pull apart the heat exchanger and air intake/exhaust assembly. (Figure 10)
27. Remove 4 screws attaching the bracket on top of the heat exchanger. Pull off the bracket. (Figure 11)
4 screws
(bracket)
Figure 11
Figure 10
WARNING
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
28. Install the O-ring (included in kit) over the water outlet tube and the O-ring (included in kit) over the water flow servo tube
or bypass tube. (Figure 2)
29. Install the bracket over the replacement heat exchanger. Push evenly on both sides of the bracket. Attach with four
screws. (Figure 10)
30. Push the heat exchanger into the air intake/exhaust assembly. Attach with four screws. (Figure 8)
31. Attach the cover plate over the air intake passage with 9 screws. (Figure 7)
32. Relocate water heater components:
Important: Take note of wire harness routing prior to removal.
A.
Remove overheat bimetal from upper left heat exchanger. (one screw) Remove thermal fuse harness and clips from
around heat exchanger. Install bimetal and thermal fuse on new heat exchanger. Use 2 clips on back and 1 clip on
side for thermal fuse
B.
Remove thermistor and o ring from upper right heat exchanger. Install thermistor and new o ring (in kit) on new
heat exchanger.
C.
Remove heating elements, sensor and clips from heat exchanger. Install on new heat exchanger.Remove ignitor
module from bottom of combustion chamber. Install on new heat exchanger.
D.
VB models only: Remove burner sensor from right side of heat exchanger. Install with new gasket (in kit) on new
heat exchanger.
Rinnai Water Heater Service Manual
78
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C53i(PLUS), R/C85i(PLUS), V53i,
R50LSi, R75LSi, R94LSi
33. (Figures 6a, 6b) Slide the assembly into the casing assembly and attach with 8 screws starting at the top of the water
heater.
34. Connect wire harness attachments. (Figure 5)
A.
Thermal fuse connector(s) at bundle near PCB (RD/RD to RD/RD) VB Models: (WT to RD and WT to WT)
B.
Heat exchanger thermistor connector at bundle near PCB. (WT/WT to PK/WT) VB Models: (WT/WT to PK/PK)
C.
Heating element connectors: water flow servo assembly, hot water outlet, heat exchanger heating elements (at
bottom), frost sensing switch (top left heat exchanger). NOTE: Some models do not have a connector at water
outlet or water flow servo heating elements.
D.
Ignitor module harness (GY/GY) N/A for VB models
E.
VB models only: Burner sensor from bundle near PCB. (BK/BK)
35. Connect the pressure tube.
36. (Figure 4) Replace the combustion chamber packing (included in kit) removing any residue from old packing. Insert the
burner and place the burner cover plate into position. Attach the burner cover plate first with 8 screws and then attach the
burner with 2 screws.
37. Make sure that the two black packings (Figure 12) are intact on the gas control
assembly. Make sure that the ribbed side faces toward the manifold and that the flat
side faces toward the gas valve.Attach the gas manifold with 3 machine screws at the
gas control assembly. Replace the lower and upper packings (included in kit) for the
manifold plate removing any residue.
38. For VB models except the VB2020, connect the two solenoid harnesses from the
manifold (black/red and black/orange).
39.
40.
41.
42.
43.
Attach the gas manifold with 6 screws at heat exchanger.
Attach the ignition line at the burner cover plate.
Figure 12
Attach the PC Board to the heat exchanger with 1 screw.
(Figure 2) Attach the water outlet line and bracket with 1 screw.
Depending on model, attach the line to the water flow servo assembly with 1 screw and 1 bracket or attach the lines to the
bypass valve with 1 screws and 1 brackets for each line.
44. (Figure 2) Install the fan assembly by inserting the tab on the fan assembly into the slot at the base of the heat exchanger
and attaching with two screws.
45. Push the ducting over the fan assembly exit and secure with the metal pinch clamp.
46. On V and VA models and VB2020, attach the wire harness to the solenoid on the gas manifold (brown, black wires).
47. Attach the wire harness to the fan assembly (white, yellow, black, red wires).
48. Attach the air temperature thermistor (white, white wires) to the wire harness.
49. For VB models except the VB2020, install the ignitor module bracket with one screw.
50. Install temperature controller and bracket. For the VB2020, install the status monitor assembly with one screw.
51. Install the front panel using 4 screws.
52. Turn on the water supply, power supply, and gas supply. Check for gas leaks.
Rinnai Water Heater Service Manual
79
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C98e(ASME), R98LSe(ASME)
1.
Turn off the gas supply, the 120 V power supply, and the water
supply. Drain all water from the appliance.
2.
Remove four screws securing the front panel. Remove front
panel.
3.
Disconnect wire harness at the fan assembly, the electrical
connections to the 3 solenoid valves, and the ignition line.
4.
Remove 3 screws and brackets securing the water line
connections. (Figure 1)
5.
Remove the 2 screws that attach the gas manifold to the gas
valve. These screws are machine screws and must be used at
these locations. (Figure 1)
6.
Remove the 5 screws that attach the gas manifold to the
combustion chamber (part of the heat exchanger assembly).
(Figure 1)
7.
Pull out the gas manifold and remove the connector at the ignitor
at the left side of the gas manifold. (GY/GY)
8.
Remove the 9 screws attaching the burner cover plate to the
combustion chamber. (Figure 2)
9.
Remove the 2 screws attaching the burner to the heat exchanger.
Pull out the burner. (Figure 2)
10. Disconnect wire harnesses:
A.
B.
C.
D.
Thermal fuse connectors (two) from bundle on left side of
heat exchanger (WT to WT and RD to RD)
Disconnect overheat bimetal from upper right heat exchanger.
Heat exchanger thermistor connector from bundle on left
side of heat exchanger (WT/WT to WT/PK)
Heating element connectors: water flow servo assembly, hot
water outlet, heat exchanger heating elements (at bottom
left), frost sensing switch (bottom center).
11. Remove the 4 screws connecting the heat exchanger to the
casing. (Figure 3)
5 screws
(gas manifold)
Figure 1
Figure 2
2 machine screws
(gas valve)
Water line connections
9 screws
(burner cover plate)
2 screws
(burner)
12. Pull out the assembly.
13. Relocate water heater components:
Important: Take note of wire harness routing prior to
removal.
A. Remove overheat bimetal from upper right heat exchanger.
(one screw) Install on new heat exchanger.
B. Remove thermistor and o ring from upper left heat exchanger. (two screws, one clip) Install thermistor and new o ring
(in kit) on new heat exchanger.
C. Remove thermal fuse harness and clips from around heat
exchanger. Install on new heat exchanger by sliding the
harness between the water outlet and inlet tubes (figure 4)
and connect to overheat bimetal connector.
D. Remove heating elements and clips from heat exchanger.
Install on new heat exchanger.
E. Remove the fan assembly (four screws) and install on new
heat exchanger. Figure 4
F. Remove the flue outlet (six screws) and install on the new
heat exchanger. Figure 5
Rinnai Water Heater Service Manual
80
Top screws
Figure 3
Bottom screws
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C98e(ASME), R98LSe(ASME)
14. Install the largest O-ring (included in kit) over the water outlet tube and
the two smaller O-rings (included in kit) over the water inlet tubes.
(Figure 4)
4 locations
15. Attach brackets at the back and side holding the fusible link.
16. Install the 4 screws at the top and bottom of the heat exchanger to the
casing. (Figure 3)
17. Insert the burner and place the burner cover plate into position.
Attach the burner cover plate first with 9 screws and then attach the
burner with 2 screws. (Figure 2)
18. Replace the electrode gasket. (Figure 6)
19. Make sure that the black gasket (Figure 7) is intact on the gas control
assembly. Make sure that the ribbed side faces toward the manifold
and that the flat side faces toward the gas valve. Replace the lower
and upper gaskets (included in kit) for the manifold plate removing any
residue. (Figure 8)
Figure 4
Water
outlet tube
Water inlet
tubes
20. Attach the electrical connector (GY/GY) to the ignitor on the manifold
and attach the gas manifold with 2 machine screws at the gas control
assembly. (Figure 1)
21. Attach the gas manifold with 5 screws at heat exchanger. (Figure 1)
Figure 5
22. Connect wire harness attachments:
A.
Thermal fuse connectors (two) at bundle on left side of heat
exchanger (WT to WT and RD to RD).
B. Overheat bimetal at upper left heat exchanger.
C. Heat exchanger thermistor connector at bundle on left side of
heat exchanger (WT/WT to WT/PK).
D. Heating element connectors: water flow servo assembly, hot
water outlet, heat exchanger heating elements (at bottom left),
frost sensing switch (bottom center).
Electrode
Gasket
Figure 6
23. Attach the ignition line at the burner cover plate.
Gasket
24. Attach the 3 electrical connectors to the solenoid valves.
25. Attach the wire harness to the fan assembly (white, yellow, black, red
wires).
26. Attach the brackets to the water line connections. (Figure 1)
27. Install the front panel using 4 screws. Turn on the water supply,
power supply, and gas supply. Check for gas leaks.
Figure 7
Figure 8
Gaskets
Rinnai Water Heater Service Manual
81
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C98i(ASME), R98LSi(ASME)
1. Turn off the gas supply.
2. Turn off the 120 V power supply.
Bracket screw
3. Turn off the water supply. Drain all water from the
appliance.
4. Remove four screws securing the front panel. Remove
front panel.
5. Remove the bracket holding the controller (1 screw).
(Figure 1)
6. Disconnect wire harness at the fan assembly, the electrical
connections to the 3 solenoid valves, and the ignition line.
7. Remove 3 screws and brackets securing the water line
connections. (Figure 2)
8. Remove the 2 screws that attach the gas manifold to the
gas valve. These screws are machine screws and must be
used at these locations. (Figure 2)
Figure 1
5 screws
(gas manifold)
2 machine screws
(gas valve)
9. Remove the 5 screws that attach the gas manifold to the
combustion chamber (part of the heat exchanger
assembly). (Figure 2)
10. Pull out the gas manifold and remove the connector at the
ignitor at the left side of the gas manifold. (GY/GY)
11. Remove the 9 screws attaching the burner cover plate to
the combustion chamber. (Figure 3)
12. Remove the 2 screws attaching the burner to the heat
exchanger. Pull out the burner. (Figure 3)
13. Disconnect wire harnesses:
A. Thermal fuse connectors (two) from bundle on left side
of heat exchanger (WT to WT and RD to RD)
B. Disconnect overheat bimetal from upper right heat
exchanger.
C. Heat exchanger thermistor connector from bundle on
left side of heat exchanger (WT/WT to WT/PK)
Figure 2
D. Heating element connectors: water flow servo assembly, hot water outlet, heat exchanger heating elements
(at bottom left), frost sensing switch (bottom center).
Water line connections
14. Remove the 3 screws at the seal plate at the top of the
water heater. Remove the seal plate and gasket. (Figure
4)
15. Remove flue outlet vent (4 screws). (Figure 5)
16. Remove the 4 screws connecting the heat exchanger to the
back of the casing. (Figure 6)
17. Pull out the assembly. (It is hooked on brackets in the
casing.)
Rinnai Water Heater Service Manual
82
Figure 3
9 screws
(burner cover plate)
2 screws
(burner)
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C98i(ASME), R98LSi(ASME)
18. Relocate water heater components:
A. Remove overheat bimetal from upper right heat
exchanger. (one screw) Install on new heat exchanger.
B. Remove thermistor and o ring from upper left heat
exchanger. (two screws, one clip) Install thermistor
and new o ring (in kit) on new heat exchanger.
C. Remove thermal fuse harness and clips from
around heat exchanger. Install on new heat exchanger by sliding the harness between the water
outlet and inlet tubes (figure 7) and connect to
overheat bimetal connector.
D. Remove heating elements and clips from heat exchanger. Install on new heat exchanger.
E. Remove the fan assembly (four screws) and install
on new heat exchanger. Figure 7
Figure 4
Figure 5
19. Install the largest O-ring (included in kit) over the water
outlet tube and the two smaller O-rings (included in kit)
over the water inlet tubes. (Figure 7)
20. Install the heat exchanger hooking it on the brackets in
the back.
Top left screw
Top right screw
21. Install the 4 screws at the top and bottom of the heat
exchanger to the back of the casing. (Figure 6)
22. Install the flue outlet vent (4 screws) and seal plate (3
screws) and gasket at the top of the water heater.
(Figures 4 and 5)
23. Insert the burner and place the burner cover plate into
position. Attach the burner cover plate first with 9
screws and then attach the burner with 2 screws.
(Figure 3)
Figure 6
Bottom screws
4 locations
24. Replace the electrode gasket. (Figure 8)
25. Make sure that the black gasket (Figure 9) is intact on
the gas control assembly. Make sure that the ribbed
side faces toward the manifold and that the flat side
faces toward the gas valve. Replace the lower and
upper gaskets (included in kit) for the manifold plate
removing any residue. (Figure 10)
26. Attach the electrical connector (GY/GY) to the ignitor on
the manifold and attach the gas manifold with 2 machine
screws at the gas control assembly. (Figure 2)
27. Attach the gas manifold with 5 screws at heat
exchanger. (Figure 2)
Figure 7
Water outlet tube
Rinnai Water Heater Service Manual
83
Water inlet tubes
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
R/C98i(ASME), R98LSi(ASME)
28. Connect wire harness attachments:
A. Thermal fuse connectors (two) at bundle on left side
of heat exchanger (WT to WT and RD to RD)
B. Connect overheat bimetal at upper right heat exchanger.
C. Heat exchanger thermistor connector at bundle on
left side of heat exchanger (WT/WT to WT/PK)
D. Heating element connectors: water flow servo assembly, hot water outlet, heat exchanger heating
elements (at bottom left), frost sensing switch
(bottom center).
Figure 8
Electrode Gasket
29. Attach the ignition line at the burner cover plate.
30. Attach the 3 electrical connectors to the solenoid valves.
31. Attach the wire harness to the fan assembly (white,
yellow, black, red wires).
Gasket
32. Attach the brackets to the water line connections.
(Figure 2)
33. Install the front panel using 4 screws.
34. Turn on the water supply, power supply, and gas supply.
35. Check for gas leaks.
Figure 9
Figure 10
Rinnai Water Heater Service Manual
84
Gaskets
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC80HPe
These instructions are for replacing the lower (primary) heat exchanger or the upper (secondary) heat exchanger.
WARNING
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
1. Turn off gas supply.
2. Turn off water supply. Drain all water from the
appliance.
3. Turn off 120V power supply.
10. Remove eight screws for the combustion chamber
sight glass plate. Remove plate.
11. Remove two screws attaching the burner to the heat
exchanger. Pull out the burner.
4. Remove four screws securing the front panel.
Remove front panel.
Remove fan
Remove gas manifold
13. Remove two screws from fan assembly.
5. Disconnect high tension cord from ignitor.
14. Remove fan.
6. Disconnect flame rod wires. (yellow and red)
Disconnect water lines
7. Remove the three machine screws where manifold
meets gas valve. Then remove six screws from
manifold.
15. Remove one screw from hot water line bracket.
Remove bracket by rotating and moving it up toward
the bend in the tube where the diameter is smaller.
8. Disconnect ignitor module harness, mounted on
manifold. (gray/gray)
16. Remove two screws and two brackets at by-pass
valve assembly.
9. Disconnect the two solenoid wire harnesses at
bottom of manifold. Remove manifold plate.
17. Remove clips from drain connecting pipe. Remove
drain connecting pipe.
12. Disconnect fan harness.
Flame Rod
Connectors
(Step 6)
Combustion
chamber
sight glass
plate
(Step 10)
Manifold
(Step 7)
Fan
(Steps 12-14)
Ignitor
(Step 5, 8)
Solenoid
connectors
(Step 9)
Machine
screws
(Step 7)
Drain pipe clip
(Step 17)
By-pass
valve
(Step 16)
Water outlet
(Step 15)
Rinnai Water Heater Service Manual
85
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC80HPe
18. Disconnect condensate tube from upper heat
exchanger.
25. Remove three screws on front where upper and
lower heat exchangers meet. Discard screws. Turn
heat exchanger over; remove six screws on back
Disconnect wire harnesses
where upper and lower heat exchangers meet.
Discard screws. Separate the upper heat exchanger
19. Disconnect heat exchanger thermistor (upper right).
from the lower heat exchanger.
20. Disconnect anti frost heater connector at bottom of
Installation
cabinet. One blue connector.
21. Disconnect thermal fuse harnesses (lower right).
Two single white wire connectors.
Remove heat exchanger
26. Install new gasket from kit onto the upper heat
exchanger. (Remove the old gasket if the upper
heat exchanger is not new.) Attach upper heat
exchanger to lower heat exchanger with new
screws from kit. (six screws on back, three screw on
front)
22. Remove three screws at bottom of heat exchanger.
Remove two screws at top back of heat exchanger.
Remove two screws at top on reinforcement bracket 27. If replacing lower (primary) heat exchanger,
for upper heat exchanger.
transfer wiring from old heat exchanger to new heat
exchanger. Ensure proper routing of harnesses.
23. Remove heat exchanger assembly.
These include thermal fuse, bi-metal, heat
24. If replacing the upper (secondary) heat
exchanger thermistor, and ceramic heaters.
exchanger, remove clips from two upper heat
28. Transfer parts from old heat exchanger to new heat
exchanger copper pipes. Disconnect pipes.
exchanger.
Remove eight screws from flue outlet assembly.
Discard screws.
29. If replacing the upper (secondary) heat
Remove two screws from reinforcement bracket.
exchanger, install connecting pipe to upper heat
Discard screws.
exchanger and copper tee with new o-ring and clip;
and connecting pipe between upper heat
exchanger and bypass valve with new o-ring and
clip.
Install the flue outlet assembly (8 screws) and the
reinforcement bracket (2 screws).
Upper (secondary)
heat exchanger
Flue outlet
(Step 24)
Condensate tube clip
(Step 18)
Thermistor
(Step 19)
Lower (primary)
heat exchanger
Rinnai Water Heater Service Manual
86
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC80HPe
30. Install heat exchanger assembly in case. Place
bottom in cabinet first. Attach with five screws. (two
at top back and three on bottom). Attach
reinforcement bracket with two screws.
43. Attach the gas manifold with three machine screws
at the gas control assembly. Install six screws on
gas manifold to heat exchanger. Attach wire
harness ties.
Install water and drain lines
Reconnect flame rod connectors and igniter
31. Install drain connecting pipe with new o-rings and
attach with new clips.
44. Install two flame rod connectors. (marked )
45. Attach ignitor high tension cord to the electrode.
32. Attach connecting pipe to by-pass valve with one
screw and bracket. Attach other water line with one
screw and bracket.
46. Turn on water supply, power supply, and gas
supply. Check for gas and water leaks. Perform
operational checks.
33. Attach the hot water outlet line to the hot water
outlet fitting with one screw and bracket. Reconnect
condensate tube to upper heat exchanger.
47. Install the front panel using four screws.
Reconnect wire harness
34. Reconnect heat exchanger thermistor (upper right).
35. Reconnect anti frost connector at bottom of cabinet.
One blue connector.
36. Reconnect thermal fuse harnesses (lower right).
Two single white wire connectors.
Install burner and burner cover plate
37. Install burner assembly with two screws. Remove
combustion chamber packing on sight glass plate.
Install new packing, in kit, on sight glass plate.
Install combustion chamber sight glass plate with
eight screws.
Install fan
38. Reinstall fan with two screws. Install fan connector.
Install gas manifold
39. Remove packing from gas control assembly.
Discard. Install new packing, in kit, on gas control
assembly.
40. Remove the packing for manifold. Install new
packing, in kit, on gas manifold.
41. Reconnect the two solenoid wire harnesses at
bottom of manifold.
42. Reconnect ignitor module harness, mounted on
manifold. (gray/gray)
Rinnai Water Heater Service Manual
87
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC80HPi
These instructions are for replacing the lower (primary) heat exchanger or the upper (secondary) heat exchanger.
WARNING
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
1. Turn off gas supply.
2. Turn off water supply. Drain all water from the
appliance.
3. Turn off 120V power supply.
4. Remove four screws securing the front panel.
Remove front panel.
Remove controller assembly
5. Remove temperature controller. Remove two
screws for temperature controller bracket. Remove
bracket.
Remove gas manifold
6. Disconnect high tension cord from ignitor.
7. Disconnect flame rod wires. (yellow and red)
8. Remove three machine screws where manifold
meets the gas valve, then remove six screws from
the manifold.
9. Disconnect ignitor module harness, mounted on
manifold. (gray/gray)
10. Disconnect the two solenoid wire harnesses at
bottom of manifold. Remove manifold plate.
11. Remove eight screws for the combustion chamber
sight glass plate. Remove plate.
12. Remove two screws attaching the burner to the heat
exchanger. Pull out the burner.
Remove fan
13. Disconnect fan harness.
14. Remove two screws from fan assembly.
15. Remove fan.
Disconnect water lines
16. Remove one screw from hot water line bracket.
Remove bracket by rotating and moving it up toward
the bend in the tube where the diameter is smaller.
17. Remove two screws and two brackets at by-pass
valve assembly.
18. Remove clips from drain connecting pipe. Remove
drain connecting pipe.
Flame Rod
Connectors
(Step 7)
Combustion
chamber
sight glass
plate
(Step 11)
Manifold
(Step 8)
Ignitor
(Step 6, 9)
Fan
(Step 13-15)
Solenoid
connectors
(Step 10)
Machine
screws
(Step 8)
Drain pipe clip
(Step 18)
By-pass
valve
(Step 17)
Water outlet
(Step 16)
Rinnai Water Heater Service Manual
88
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC80HPi
29. Remove three screws on front where upper and
lower heat exchangers meet. Discard screws. Turn
heat exchanger over; remove six screws on back
Disconnect wire harnesses
where upper and lower heat exchangers meet.
Discard screws. Separate the upper heat exchanger
20. Disconnect heat exchanger thermistor (upper right).
from the lower heat exchanger.
21. Remove three anti frost heaters from clips at top of
30. If replacing the upper (secondary) heat
heat exchanger.
exchanger, then remove fourteen screws to
22. Disconnect anti frost heater connectors at bottom of
separate it from the air inlet box assembly. Discard
cabinet. One blue connector.
screws and remove air inlet box assembly.
Remove the old gasket from the air inlet box
23. Disconnect burner sensor harness (lower right).
assembly. Install new gasket from kit. Attach air
24. Disconnect thermal fuse harnesses (lower right).
inlet box assembly with new screws (fourteen) from
Two single white wire connectors.
kit. Ensure reinstallation of reinforcement bracket
on top of air inlet box assembly.
Remove heat exchanger
19. Disconnect condensate tube from upper heat
exchanger.
25. Remove three screws at bottom of heat exchanger. Installation
Remove two screws at top back of heat exchanger. 31. Install new gasket from kit onto the upper heat
Remove two screws at top on reinforcement bracket
exchanger. (Remove the old gasket if the upper
for upper heat exchanger.
heat exchanger is not new.) Attach upper heat
exchanger to new lower heat exchanger with new
26. Remove four screws for flue connection assembly.
screws from kit. (six screws on back, three screw on
Remove flue connection.
front)
27. Remove heat exchanger assembly.
32. If replacing the lower (primary) heat exchanger,
28. Remove clips and connecting pipe between upper
transfer wiring from old heat exchanger to new heat
heat exchanger and copper tee on left side.
exchanger. Ensure proper routing of harnesses.
These include burner sensor with new gasket,
thermal fuse, bi-metal, ceramic heaters.
Anti frost
heaters/clips
(Step 21)
Upper (secondary)
heat exchanger
Condensate tube clip
(Step 19)
Thermistor
(Step 20)
Lower (primary)
heat exchanger
Rinnai Water Heater Service Manual
89
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC80HPi
33. If replacing the lower (primary) heat exchanger, Install gas manifold
transfer parts from old heat exchanger to new heat
46. Remove packing from gas control assembly.
exchanger. These include connecting pipe between
Discard. Install new packing, in kit, on gas control
upper heat exchanger and copper tee with new oassembly.
rings and clips, connecting pipe between upper heat
exchanger and bypass valve with new o-ring and
47. Remove the packing for manifold. Install new
clip.
packing, in kit, on gas manifold.
34. Install heat exchanger assembly in case. Place
bottom in cabinet first. Attach with five screws. (two
at top back and three on bottom) Attach
reinforcement bracket with two screws.
48. Reconnect ignitor module harness, mounted on
manifold. (gray/gray)
49. Install two connectors to the solenoids on the gas
manifold. (marked)
35. Remove old gasket from flue connection assembly.
Install new gasket from kit. Attach flue connections
assembly with four screws.
50. Attach the gas manifold with three machine screws
at the gas control assembly. Install six screws on
gas manifold to heat exchanger. Attach wire
harness ties.
Install water and drain lines
36. Install drain connecting pipe with new o-rings and
attach with new clips.
Reconnect flame rod connectors and igniter
51. Install two flame rod connectors. (marked )
37. Attach water inlet connecting pipe with new o-rings
at by-pass valve with one screw and bracket. Attach 52. Attach ignitor high tension cord to the electrode.
other water line with one screw and bracket.
53. Attach controller bracket with one machine screw
and one screw from power wire clamp. Install
38. Attach the hot water outlet line to the hot water
controller in bracket.
outlet fitting with one screw and bracket. Reconnect
condensate tube at upper heat exchanger.
54. Turn on water supply, power supply, and gas
supply. Check for gas and water leaks. Perform
operational checks.
Reconnect wire harness
39. Reconnect heat exchanger thermistor (upper right).
40. Install three anti frost heaters in clips at top of upper
heat exchanger.
55. Install the front panel using four screws.
41. Reconnect anti frost connectors at bottom of
cabinet. One blue connector.
42. Reconnect burner sensor harness (lower right).
43. Reconnect thermal fuse harnesses (lower right).
Two single white wire connectors.
Install burner and burner cover plate
44. Install burner assembly with two screws. Remove
combustion chamber packing on sight glass plate.
Install new packing, in kit, on sight glass plate.
Install combustion chamber sight glass plate with
eight screws.
Install fan
45. Reinstall fan with two screws. Install fan connector.
Rinnai Water Heater Service Manual
90
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC98HPe
These instructions are for replacing the lower (primary) heat exchanger or the upper (secondary) heat exchanger.
WARNING
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
9. Remove eight screws for the combustion chamber
sight glass plate. Remove plate.
1. Turn off gas supply.
2. Turn off water supply. Drain all water from the
appliance.
10. Remove two screws attaching the burner to the
heat exchanger. Pull out the burner.
3. Turn off 120V power supply.
Disconnect water lines
4. Remove four screws securing the front panel.
Remove front panel.
Remove gas manifold
5. Disconnect high tension cord from ignitor. Remove
one screw for ignitor bracket. Remove ignitor
bracket from manifold.
11. Remove one screw from hot water line bracket.
Remove bracket by rotating and moving it up
toward the bend in the tube where the diameter is
smaller.
12. Remove two screws and two brackets at by-pass
valve assembly.
6. Disconnect flame rod connectors. (yellow and red)
13. Remove lower clip from drain connecting pipe.
7. Remove seven pan head screws from manifold (six
14. Remove the clip on the heat exchanger inlet pipe on
screws on the outer edge, one screw in middle),
the right side of heat exchanger. Remove the two
and three machine screws, at bottom of manifold, to
anti frost heaters from pipe. Remove heat
gas valve.
exchanger inlet pipe.
8. Disconnect the four connectors from the solenoids
15. Disconnect condensate tube from upper heat
at bottom of manifold. Remove manifold plate.
exchanger.
Flame Rod
Connectors
(Step 6)
Combustion
chamber
sight glass
plate
(Step 9)
Manifold
(Step 7)
Ignitor
(Step 5)
Solenoid
connectors
(Step 8)
Machine
screws
(Step 7)
Drain pipe clip
(Step 13)
By-pass
valve
(Step 12)
Water outlet
(Step 11)
Rinnai Water Heater Service Manual
91
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
Disconnect wire harnesses
16. Disconnect heat exchanger thermistor (upper right).
17. Disconnect anti frost heater connector at bottom of
cabinet. One blue and one green connector.
18. Disconnect thermal fuse harnesses (lower right).
Single white wire connectors and single red wire
connector.
Remove heat exchanger
RC98HPe
22. Remove three screws on front where upper and
lower heat exchangers meet. Discard screws. Turn
heat exchanger over; remove six screws on back
where upper and lower heat exchangers meet.
Discard screws. Separate the upper heat exchanger
from the lower heat exchanger.
Installation
23. Install new gasket from kit onto the upper heat
exchanger. (Remove the old gasket if the upper
heat exchanger is not new.) Attach upper heat
exchanger to lower heat exchanger with new screws
from kit. (six screws on back, three screw on front)
19. Remove two screws at bottom of heat exchanger.
Remove two screws at top back of heat exchanger.
Remove two screws at top on reinforcement bracket
24. If replacing the lower (primary) heat exchanger,
for upper heat exchanger. Upper frost sensing
transfer wiring from old heat exchanger to new heat
switch is secured on reinforcement bracket—set
exchanger. Ensure proper routing of harnesses.
aside.
These include thermal fuse, bi-metal, ceramic
20. Remove heat exchanger assembly.
heaters.
21. If replacing the upper (secondary) heat
25. Transfer parts from old heat exchanger to new heat
exchanger, remove clips from two upper heat
exchanger.
exchanger copper pipes. Disconnect pipes.
26. If replacing the upper (secondary) heat
Remove eight screws from flue outlet assembly.
exchanger, install connecting pipe to upper heat
Discard screws.
exchanger and copper tee with new o-ring and clip;
Remove two screws from reinforcement bracket.
and connecting pipe between upper heat
Discard screws.
exchanger and bypass valve with new o-ring and
clip.
Install the flue outlet assembly (8 screws) and the
reinforcement bracket (2 screws).
Flue outlet
(Step 21)
Upper (secondary)
heat exchanger
Inlet pipe and
clip (Step 14)
Lower (primary)
heat exchanger
Thermistor
(Step 16)
Condensate tube clip
(Step 15)
Rinnai Water Heater Service Manual
92
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC98HPe
27. Install heat exchanger assembly in case. Place
bottom in cabinet first. Attach with four screws. (two
at top back and two on bottom). Install
reinforcement bracket with two screws. Ensure the
frost sensing switch is installed.
38. Attach the gas manifold with three machine screws
at the gas control assembly. Install seven screws on
gas manifold to heat exchanger. Attach wire
harness ties.
Install water and drain lines
39. Install two flame rod connectors. (marked)
28. Install drain connecting pipe with new o-rings and
attach with new clips.
40. Install ignitor bracket with one machine screw.
Reconnect flame rod connectors and igniter
41. Attach ignitor high tension cord to the electrode.
29. Attach connecting pipe to by-pass valve with one
screw and bracket. Attach other water line with one
screw and bracket.
42. Turn on water supply, power supply, and gas
supply. Check for gas and water leaks. Perform
operational checks.
30. Attach the hot water outlet line to the hot water
outlet fitting with one screw and bracket. Reconnect 43. Install the front panel using four screws.
condensate tube to upper heat exchanger.
Reconnect wire harness
31. Reconnect heat exchanger thermistor (upper left).
32. Reconnect anti frost connector at bottom of cabinet.
One blue and one green connector.
33. Reconnect thermal fuse harnesses (lower right).
Single white wire connectors and single red wire
connector.
Install burner and burner cover plate
34. Install burner assembly with two screws. Remove
combustion chamber packing on sight glass plate.
Install new packing, in kit, on sight glass plate.
Install combustion chamber sight glass plate with
eight screws.
Install gas manifold
35. Remove packing from gas control assembly.
Discard. Install new packing, in kit, on gas control
assembly.
36. Remove the packing for manifold. Install new
packing, in kit, on gas manifold.
37. Reconnect the four connectors at bottom of
manifold.
Rinnai Water Heater Service Manual
93
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC98HPi
These instructions are for replacing the lower (primary) heat exchanger or the upper (secondary) heat exchanger.
WARNING
Failure to correctly assemble the components according to these instructions
may result in a gas leak or explosion.
1. Turn off gas supply.
8. Remove seven pan head screws from manifold. (Six
screws on outer edge, one screw in middle and
three machine screws from bottom of manifold to
gas valve.)
2. Turn off water supply. Drain all water from the
appliance.
3. Turn off 120V power supply.
9. Remove four connectors from the solenoids at the
bottom of the manifold. Remove manifold.
4. Remove four screws securing the front panel.
Remove front panel.
10. Remove eight screws for the combustion chamber
sight glass plate. Remove plate.
Remove controller assembly
11. Remove two screws attaching the burner to the heat
exchanger. Pull out the burner.
5. Remove temperature controller. Remove two
screws for temperature controller bracket. Remove
bracket.
Disconnect water lines
Remove gas manifold
6. Remove high tension cord from ignitor. Remove one
screw for ignitor bracket. Remove ignitor bracket
from manifold.
7. Remove red and yellow flame rod connectors.
12. Remove one screw from hot water line bracket.
Remove bracket by rotating and moving it up toward
the bend in the tube where the diameter is smaller.
13. Remove two screws and two brackets at by-pass
valve assembly.
14. Remove lower clip from drain connecting pipe.
Flame Rod
Connectors
(Step 7)
Combustion
chamber
sight glass
plate
(Step 10)
Manifold
(Step 8)
Ignitor
(Step 6)
Solenoid
connectors
(Step 9)
Machine
screws
(Step 8)
Drain pipe clip
(Step 14)
By-pass
valve
(Step 13)
Water outlet
(Step 12)
Rinnai Water Heater Service Manual
94
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC98HPi
15. Remove the clip on the heat exchanger inlet pipe on 26. Remove anti frost heater from connecting pipe
between upper heat exchanger and copper tee on
right side of heat exchanger. Remove the two anti
left side. Remove clips and connecting pipe.
frost heaters from pipe. Remove heat exchanger
inlet pipe.
27. Remove three screws on front, where upper and
lower heat exchangers meet. Discard screws. Turn
16. Disconnect condensate tube from upper heat
heat exchanger over; remove six screws on back
exchanger.
where upper and lower heat exchangers meet.
Disconnect wire harness
Discard screws. Separate the upper heat exchanger
from the lower heat exchanger.
17. Disconnect heat exchanger thermistor (upper left).
28. If replacing the upper (secondary) heat
exchanger, then remove fourteen screws to
separate it from the air inlet box assembly. Discard
19. Disconnect anti frost heater connectors at bottom of
screws and remove air inlet box assembly.
cabinet. (one green connector with cables leading to
Remove the old gasket from the air inlet box
the right side, one blue connector.)
assembly. Install new gasket from kit. Attach air
inlet box assembly with new screws (fourteen) from
20. Disconnect burner sensor harness (lower right).
kit. Ensure reinstallation of reinforcement bracket
21. Disconnect thermal fuse harnesses (lower right).
on top of air inlet box assembly.
Single white wire connector, single red wire
Installation
connector.
18. Remove three anti frost heaters from clips at top of
heat exchanger.
29. Install new gasket from kit onto the upper heat
exchanger. (Remove the old gasket if the upper
Remove heat exchanger
heat exchanger is not new.) Attach upper heat
exchanger to the lower heat exchanger with new
23. Remove two screws at bottom of heat exchanger.
screws from kit. (six screws on back, three screw on
Remove two screws at top back of heat exchanger.
front)
Remove two screws at top on reinforcement bracket
for upper heat exchanger. Upper frost sensing
30. If replacing the lower (primary) heat exchanger,
switch is secured on reinforcement bracket, set
transfer wiring from old heat exchanger to new heat
aside.
exchanger. Ensure proper routing of harnesses.
22. Disconnect fan connector.
These include burner sensor with new gasket,
thermal fuse, bi-metal, ceramic heaters.
24. Remove four screws for flue connection assembly.
Remove flue connection.
25. Remove heat exchanger assembly.
Anti frost
heaters/clips
(Step 18)
Upper (secondary)
heat exchanger
Inlet pipe clip
(Step 15)
Thermistor
(Step 17)
Lower (primary)
heat exchanger
Condensate tube clip
(Step 16)
Rinnai Water Heater Service Manual
95
100000098 Rev B
Component Replacement Instructions
Heat Exchanger
RC98HPi
31. If replacing the lower (primary) heat exchanger,
transfer parts from old heat exchanger to new heat
exchanger. These include fan housing assembly,
connecting pipe to upper heat exchanger and
copper tee with new o-ring and clip, drain pipe from
copper tee.
45. Remove the packing for manifold. Install new
packing, in kit, on gas manifold.
32. Install heat exchanger assembly in case. Place
bottom in cabinet first. Attach with four screws. (two
at top back and two on bottom) Attach
reinforcement bracket with two screws.
46. Attach the gas manifold with three machine screws
at the gas control assembly. Install seven pan head
screws on gas manifold to heat exchanger. Attach
wire harness ties. (six screws at outer edge, one
middle of gas manifold plate)
47. Install four connectors to the solenoids on the gas
manifold. (marked)
Reconnect flame rod connectors and igniter
33. Remove old gasket from flue connection assembly.
Install new gasket from kit. Attach flue connections
assembly with four screws.
48. Install two flame rod connectors. (marked )
49. Install ignitor bracket with one machine screw.
Install water and drain lines
50. Attach ignitor high tension cord to the electrode.
34. Install drain connecting pipe with new o-rings and
attach with new clips.
51. Attach controller bracket with one machine screw
and one screw from power wire clamp. Install
controller in bracket.
35. Install water inlet connecting pipe with new o-rings
to upper heat exchanger. Attach with new clip at
heat exchanger and at bottom to the by-pass valve
with one screw and bracket. Attach the other water
line with one screw and bracket.
Check
52. Turn on water supply, power supply, and gas
supply. Check for gas and water leaks. Perform
operational checks.
36. Attach the hot water outlet line to the hot water
outlet fitting with one screw and bracket. Reconnect 53. Install the front panel using four screws.
condensate tube to upper heat exchanger.
Reconnect wire harness
37. Reconnect heat exchanger thermistor (upper left).
38. Install three anti frost heaters in clips at top of upper
heat exchanger.
39. Reconnect anti frost connectors at bottom of
cabinet. One green connector, one blue connector.
40. Reconnect burner sensor harness (lower right).
41. Reconnect thermal fuse harnesses (lower right).
Single white wire connector, single red wire
connector.
42. Reconnect the fan connector.
Install burner and burner cover plate
43. Install burner assembly with two screws. Replace
combustion chamber packing (in kit) on sight glass
plate. Install combustion chamber sight glass plate
with eight screws.
Install gas manifold
44. Remove packing from gas control assembly.
Discard. Install new packing, in kit, on gas control
assembly.
Rinnai Water Heater Service Manual
96
100000098 Rev B
Gas Pressure Setting Procedure
Figure 1
CAUTION
Potentiometer (POT)
Do not touch the areas at or near the heat
exchanger or combustion chamber. These areas
become very hot and could cause burns.
1. Remove the front panel (four screws).
2. Calibrate the low fire and high fire settings as
follows:
A. Remove the allen head plug and attach the
manometer to the burner test point located
on the gas control. (Figure 1-5)
Figure 2
Potentiometer (POT)
Burner test point
Dip switches (SW1)
Models R/C42e, R/C53e, V53e, R63LSe
Figure 3
Burner test point
Dip switches (SW1)
Burner test point
Models R70e, R75LSe, R/C85e, R94LSe,
R50LSi, R/C53i, R75LSi, R/C85i, R94LSi
Figure 4
Burner test point
Potentiometer (POT)
Models R/C98e, R98LSe, R/C98i, R98LSi
Potentiometer (POT)
Figure 5
Burner test point
Dip switches (SW1)
Potentiometer (POT)
Dip switches (SW1)
Models RC80HPe, RC80HPi
Models RC98HPe, RC98HPi
Rinnai Water Heater Service Manual
Dip switches (SW1)
97
100000098 Rev B
Gas Pressure Setting Procedure
B. Turn on the gas supply.
Figure 4
C. Turn on the power supply.
D. Flow water through the water heater at the
maximum flow rate obtainable. (At least 3
gallons per minute is recommended. If there is
not enough water flowing, the water heater
could shut off or sustain damage due to
overheating.)
Access plug
E. Move No. 7 dip switch of the SW1 bank to the
ON position to calibrate “Forced Low”
combustion. (Figure 5)
Figure 5
F. Check the burner test point pressure.
Forced Low
G. Remove the rubber access plug (Figure 4) and
adjust the regulator screw on the modulating
valve to obtain the correct low fire manifold
pressure. Refer to the Manifold Gas Pressure
Settings section, page 101-105. Install rubber
access plug.
Switch No.
ON
O
F
F
1
2
3
4
5
6
7
8
H. Move No. 7 and No. 8 dip switches of the SW1
bank to the ON position to calibrate “Forced
High” combustion. (Figure 6)
I.
Check the burner test point pressure.
J.
Adjust the high pressure Potentiometer (POT)
(Figure 1-5) on the PC Board to obtain the
correct high fire manifold pressure. Refer to the
Manifold Gas Pressure Settings section, page
101-105.
Figure 6
Forced High
Switch No.
ON
O
F
F
1
2
3
4
5
6
K. Move No. 7 and No. 8 back to the OFF position
to return the appliance to “Normal” combustion.
(Figure 7)
L.
7
8
Close hot water taps.
M. Turn off gas supply and 120 V power supply.
N. Remove manometer and re-install allen head
plug.
Figure 7
Normal
O. Turn on the gas supply and 120 V power
supply.
Switch No.
ON
O
F
F
1
2
3
4
P. Operate the unit and check for gas leaks.
5
6
3. Install the front panel using four screws.
7
8
Rinnai Water Heater Service Manual
98
100000098 Rev B
Manifold Gas Pressure Settings
V Series - Outdoor
Natural Gas
R42e,C42e
R53e,C53e
R85e(PLUS),
C85e(PLUS)
R70e
R98e(ASME),
C98e(ASME)
Propane Gas
Altitude
less than 5000 ft
(1524 m)
6000 ft (1829 m)
7000 ft (2134 m)
High Fire
Low Fire
3.5
3.4
3.3
0.73
0.71
0.69
8000-10000 ft
3.2
0.67
Altitude
High Fire
less than 2000 ft
3000 ft (914 m)
4000 ft (1219 m)
Altitude
less than 2000 ft
(610 m)
3000 ft (914 m)
4000 ft (1219 m)
5000 ft (1524 m)
High Fire
Low Fire
3.3
3.0
2.7
2.3
0.72
0.65
0.58
0.50
Low Fire
Altitude
High Fire
Low Fire
3.7
3.5
3.4
0.74
0.71
0.68
less than 2000 ft
3.5
0.74
5000-10000 ft
3.2
0.64
Altitude
High Fire
Low Fire
High Fire
Low Fire
less than 10000 ft
3.4
0.56
Altitude
less than 2000 ft
(610 m)
3000 ft (914 m)
4000 ft (1219 m)
5000 ft (1524 m)
6000 ft (1829 m)
7000-10000 ft
(2134 - 3048 m)
5.1
4.8
4.5
4.3
4.2
0.88
0.83
0.78
0.73
0.72
4.1
0.71
Altitude
less than 10000 ft
(3048 m)
High Fire
Low Fire
5.1
0.88
Altitude
less than 2000 ft
(610 m)
3000 ft (914 m)
4000 ft (1219 m)
5000 ft (1524 m)
6000-10000 ft
(1829 - 3048 m)
High Fire
Low Fire
3.8
3.6
3.3
3.1
0.80
0.75
0.69
0.64
3.0
0.63
Altitude
less than 10000 ft
(3048 m)
High Fire
Low Fire
3.4
0.56
Altitude
less than 2000 ft
(610 m)
3000 ft (914 m)
4000 ft (1219 m)
5000 ft (1524 m)
6000 ft (1829 m)
7000 ft (2134 m)
8000-10000 ft
(2438 - 3048 m)
High Fire
Low Fire
2.8
2.7
2.6
2.4
2.3
2.2
0.66
0.63
0.60
0.57
0.54
0.52
2.1
0.50
Rinnai Water Heater Service Manual
99
100000098 Rev B
Manifold Gas Pressure Settings
V Series - Indoor
Natural Gas
Propane Gas
R53i(PLUS),
C53i(PLUS),
R85i(PLUS),
C85i(PLUS)
Altitude
less than 10000 ft
(3048 m)
High Fire
Low Fire
3.7
0.77
R98i(ASME),
C98i(ASME)
Altitude
less than 2000 ft
(610 m)
3000 ft (914 m)
4000 ft (1219 m)
5000-10000 ft
(1524 - 3048 m)
High Fire
Low Fire
3.0
2.8
2.7
0.67
0.64
0.60
2.5
0.56
Rinnai Water Heater Service Manual
100
Altitude
less than 2000 ft
(610 m)
3000 ft (914 m)
4000 ft (1219 m)
5000 ft (1524 m)
6000 ft (1829 m)
7000 ft (2134 m)
8000 ft (2438 m)
9000 ft (2743 m)
10000 ft (3048 m)
High Fire
Low Fire
4.2
4.0
3.9
3.7
3.7
3.6
3.6
3.4
3.2
0.93
0.90
0.86
0.82
0.82
0.80
0.80
0.79
0.75
Altitude
less than 2000 ft
(610 m)
3000 ft (914 m)
4000 ft (1219 m)
5000 ft (1524 m)
High Fire
Low Fire
3.7
3.5
3.3
3.0
0.83
0.78
0.73
0.67
100000098 Rev B
Altitude
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 ON, #3 OFF
#2 ON, #3 ON
Rinnai Water Heater Service Manual
2.8
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
101
0.5
0.5
0.5
0.52
0.9
0.7
0.7
0.52
Min Rate
inches
W.C.
2.8
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 ON, #3 OFF
#2 ON, #3 ON
R98LSi (REU-VA3237FFU)
2.8
2001-5200 ft (610-1585 m)
#2 OFF, #3 ON
0.67
0.7
0.8
1.7
2.7
2.7
2.5
0.5
0.5
0.5
0.52
0.5
0.5
0.5
0.52
3.0
2.1
2.4
3.3
#2 OFF, #3 OFF 0-2000 ft (0-610 m)
R94LSi (REU-VA2535FFU-US) (REU-VA2535FFU-UC)
2.1
2.4
2.7
#2 OFF, #3 OFF 0-2000 ft (0-610 m)
R75LSi(A) (REU-VA2528FFU(A)-US) (REU-VA2528FFU(A)-UC)
2.1
2.4
3.3
1.8
#2 OFF, #3 OFF 0-2000 ft (0-610 m)
R75LSi (REU-VA2528FFU-US)
1.7
2001-5200 ft (610-1585 m)
#2 OFF, #3 ON
1.7
2.0
Max Rate
inches
W.C.
#2 OFF, #3 OFF 0-2000 ft (0-610 m)
R50LSi (REU-VA2019FFU)
Dip Switch
Setting
MAX VENT
Dip Switch #1 is OFF
2.5
2.7
2.7
3.0
2.1
2.4
2.8
3.3
2.1
2.4
2.8
2.7
2.1
2.4
2.8
3.3
1.8
1.7
1.8
2.0
Max Rate
inches
W.C.
1.2
0.8
0.7
0.67
0.5
0.5
0.6
0.52
0.5
0.5
0.5
0.52
0.5
0.5
0.6
0.52
0.9
0.7
0.7
0.52
Min Rate
inches
W.C.
MIN VENT
Dip Switch #1 is ON
Natural Gas (Gaz Naturel)
VA Models
2.8
3.0
2.9
3.7
3.2
3.4
3.3
5.0
3.2
3.4
3.3
4.4
3.2
3.4
3.3
5.0
2.8
2.8
3.1
3.2
Max Rate
inches
W.C.
0.83
0.83
0.83
0.83
1.1
1.1
1.0
0.92
1.1
1.1
1.0
0.92
1.1
1.1
1.0
0.92
1.1
0.9
1.0
0.92
Min Rate
inches
W.C.
MAX VENT
Dip Switch #1 is OFF
2.8
3.0
2.9
3.7
3.2
3.4
3.4
5.0
3.2
3.4
3.4
4.4
3.2
3.4
3.4
5.0
2.8
2.8
3.0
3.2
Max Rate
inches
W.C.
1.2
0.9
0.83
0.83
1.1
1.2
1.0
0.92
1.1
1.2
1.0
0.92
1.1
1.2
1.0
0.92
1.4
1.1
1.1
0.92
Min Rate
inches
W.C.
MIN VENT
Dip Switch #1 is ON
Propane Gas (Gaz propane)
Manifold Gas Pressure Settings
100000098 Rev B
Rinnai Water Heater Service Manual
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
102
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
0-2000 ft (0-610 m)
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 OFF
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
R63LSe2 (REU-VA2024W(A)-US)
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
R63LSe (REU-VA2024W)
0-2000 ft (0-610 m)
Altitude
#2 OFF, #3 OFF
V53e (REU-VAM1620W)
Dip Switch Setting
1.5
1.7
1.7
2.0
1.5
1.5
1.6
1.7
2.4
2.4
2.4
2.5
Max Rate
inches W.C.
0.70
0.70
0.55
0.56
0.5
0.5
0.4
0.53
0.9
0.7
0.7
0.73
Min Rate
inches W.C.
Natural Gas (Gaz Naturel)
VA Models
2.7
2.7
2.8
3.0
1.8
2.0
2.0
2.4
2.0
2.0
2.2
2.4
Max Rate
inches W.C.
0.80
1.00
0.90
0.88
0.8
0.7
0.7
0.61
0.7
0.8
0.9
0.75
Min Rate
inches W.C.
Propane Gas (Gaz propane)
Manifold Gas Pressure Settings
100000098 Rev B
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
Rinnai Water Heater Service Manual
7701-10200 ft (2277-3109 m)
#2 ON, #3 OFF
#2 ON, #3 ON
103
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
#2 ON, #3 OFF
7701-10200 ft (2277-3109 m)
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
#2 OFF, #3 ON
#2 ON, #3 ON
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
R98LSe (REU-VA3237W)
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
R94LSe
(REU-VA2535W-US) (REU-VA2535W-UC)
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
#2 OFF, #3 ON
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
R75LSe(A)
(REU-VA2528W(A)-US) (REU-VA2528W(A)-UC)
0-2000 ft (0-610 m)
Altitude
#2 OFF, #3 OFF
R75LSe (REU-VA2528W-US)
Dip Switch Setting
2.5
2.5
2.5
2.8
3.1
3.3
3.3
3.3
3.1
3.3
3.3
2.9
3.1
3.3
3.3
3.3
Max Rate
inches W.C.
0.7
0.7
0.7
0.65
0.7
0.9
0.7
0.56
0.7
0.9
0.7
0.56
0.7
0.9
0.7
0.56
Min Rate
inches W.C.
Natural Gas (Gaz Naturel)
VA Models
3.0
3.0
3.0
3.8
4.0
4.0
4.0
5.1
4.0
4.0
4.0
4.2
4.0
4.0
4.0
5.0
Max Rate
inches W.C.
0.80
0.80
0.80
0.80
0.9
0.9
1.1
0.88
0.9
0.9
1.1
0.88
0.9
0.9
1.1
0.88
Min Rate
inches W.C.
Propane Gas (Gaz propane)
Manifold Gas Pressure Settings
100000098 Rev B
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
Rinnai Water Heater Service Manual
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
104
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
0-2000 ft (0-610 m)
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 OFF
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
R94LSe (REU-VB2735WD-US)
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
R94LSi (REU-VB2735FFUD-US)
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
R75LSe (REU-VB2528WD-US)
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
R75LSi (REU-VB2528FFUD-US)
0-2000 ft (0-610 m)
Altitude
#2 OFF, #3 OFF
V53i (REU-VB2020FFU-US)
Dip Switch Setting
0.50 (13)
0.50 (13)
0.50 (13)
3.1 (79)
3.0 (76)
3.0 (76)
0.65 (17)
2.5 (64)
0.44 (11)
0.60 (15)
2.6 (66)
2.8 (71)
0.50 (13)
2.6 (66)
0.50 (13)
2.9 (74)
0.55 (14)
0.45 (11)
2.9 (74)
3.4 (86)
0.50 (13)
2.9 (74)
0.55 (14)
2.4 (61)
0.44 (11)
0.60 (15)
2.6 (66)
2.3 (58)
0.55 (14)
0.60 (15)
2.0 (51)
2.5 (64)
0.60 (15)
2.0 (51)
0.55 (14)
0.60 (15)
2.3 (58)
2.9 (74)
0.57 (14)
Min Rate
inches W.C.
2.1 (54)
Max Rate
inches W.C.
Natural Gas (Gaz Naturel)
VB Models
3.7 (94)
4.1 (104)
4.2 (107)
5.0 (127)
2.9 (74)
3.5 (89)
3.8 (97)
5.4 (137)
3.3 (84)
3.8 (97)
4.2 (107)
4.2 (107)
2.8 (71)
3.5 (89)
3.2 (81)
4.5 (114)
2.8 (71)
3.0 (76)
3.1 (79)
3.4 (87)
Max Rate
inches W.C.
0.80 (20)
0.90 (23)
0.90 (23)
0.93 (24)
1.00 (25)
1.00 (25)
1.00 (25)
0.96 (24)
0.90 (23)
0.80 (20)
0.90 (23)
0.93 (24)
0.95 (24)
1.00 (25)
1.00 (25)
0.96 (24)
1.0 (25)
1.0 (25)
0.95 (24)
0.98 (25)
Min Rate
inches W.C.
Propane Gas (Gaz propane)
Manifold Gas Pressure Settings
100000098 Rev B
Altitude
Rinnai Water Heater Service Manual
#2 ON, #3 ON
105
7701-10200 ft (2277-3109 m)
#2 ON, #3 ON
7701-10200 ft (2277-3109 m)
#2 ON, #3 ON
0-2000 ft (0-610 m)
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
7701-10200 ft (2277-3109 m)
#2 OFF, #3 OFF
#2 OFF, #3 ON
#2 ON, #3 OFF
#2 ON, #3 ON
RC98HPe (REU-KA3237WD-US)
5201-7700 ft (1585-2277 m)
2001-5200 ft (610-1585 m)
#2 OFF, #3 ON
#2 ON, #3 OFF
0-2000 ft (0-610 m)
#2 OFF, #3 OFF
RC80HPe (REU-KA2530WD-US)
Altitude
5201-7700 ft (1585-2277 m)
#2 ON, #3 OFF
Dip Switch Setting
2.40
2001-5200 ft (610-1585 m)
#2 OFF, #3 ON
2.40
2.40
2.70
2.90
2.90
#2 OFF, #3 OFF 0-2000 ft (0-610 m)
RC98HPi (REU-KA3237FFUD-US)
7701-10200 ft (2277-3109 m)
#2 ON, #3 OFF
2.90
2001-5200 ft (610-1585 m)
5201-7700 ft (1585-2277 m)
#2 OFF, #3 ON
3.00
Max Rate
inches
W.C.
2.40
2.40
2.40
2.40
2.85
2.90
3.20
2.90
Max Rate
inches
W.C.
0.90
0.80
0.80
0.85
0.55
0.55
0.70
0.70
Min Rate
inches
W.C.
MIN VENT
Dip Switch #1 is ON
2.20
2.20
2.20
2.20
2.90
2.90
2.90
2.70
Max Rate
inches W.C.
0.70
0.70
0.70
0.63
0.60
0.60
0.60
0.61
Min Rate
inches W.C.
Natural Gas (Gaz Naturel)
0.80
0.80
0.80
1.08
0.55
0.55
0.70
0.81
Min Rate
inches
W.C.
MAX VENT
Dip Switch #1 is OFF
#2 OFF, #3 OFF 0-2000 ft (0-610 m)
RC80HPi (REU-KA2530FFUD-US)
Dip Switch
Setting
Natural Gas (Gaz Naturel)
Condensing Models
3.20
3.60
3.60
4.00
3.40
3.80
3.80
3.80
3.20
3.30
3.30
3.60
3.5
3.9
3.9
3.7
Max Rate
inches
W.C.
3.00
3.10
3.10
3.10
3.40
3.70
3.70
3.60
1.00
1.00
1.00
1.00
1.00
1.00
1.00
0.92
Min Rate
inches W.C.
1.00
1.10
1.10
1.22
0.55
0.55
0.70
1.06
Min Rate
inches
W.C.
MIN VENT
Dip Switch #1 is ON
Propane Gas (Gaz propane)
1.10
1.20
1.30
1.46
1.00
0.90
0.90
1.11
Min Rate
inches
W.C.
Max Rate
inches W.C.
Max Rate
inches
W.C.
MAX VENT
Dip Switch #1 is OFF
Propane Gas (Gaz propane)
Manifold Gas Pressure Settings
100000098 Rev B
Dip Switch Settings
V Series
SW1 Bank
SW2 Bank
OFF - “Long Flue”
ON - “Short Flue” and Outdoor Models
1
“Long flue” is defined as:
0 elbows and length is greater than 21 ft
1 elbow and length is greater than 15 ft
2 elbows and length is greater than 9 ft
1
2
ON position
3
OFF position
4
OFF position
5
OFF position
6
OFF position
7
OFF position - Used for low fire and high fire
settings. Refer to the gas pressure setting
procedure.
8
2
OFF - Propane Gas
ON - Natural Gas
OFF position for models prior to these serial
numbers: (on these units, the front panel
does not have an “R” or “C” trade name,
unless the front panel has been replaced)
V1616W, V1616WC
06.02-000001
V2020W, V2020WC
05.07-000001
V2532W, V2532WC
05.05-117257
V2532FFU, V2532FFUC
05.05-117257
V2520FFU, V2520FFUC
05.05-109539
V2526W
05.05-110434
ON position for other models, serial numbers
3
OFF position
4
OFF - Residential Models
ON - Commercial Models
VA Series (-US models; model name ends in –US; for -UC models refer to the next page)
SW2 Bank (present on replacement PC boards only)
SW1 Bank
OFF - “Long Flue”
ON - “Short Flue” and Outdoor Models
“Long flue” is defined as:
0 elbows and length is greater than 21 ft
1 elbow and length is greater than 15 ft
2 elbows and length is greater than 9 ft
1
2
3
OFF - Propane Gas
ON - Natural Gas
2
OFF - Outdoor model
ON - Indoor model
3
OFF - R63LSe, R75LSe, R75LSi, R94LSe,
R94LSi, R98LSe(ASME),
R98LSi(ASME)
ON - R50LSi, V53e
4
OFF - V53e, R63LSe, R94LSe, R94LSi,
R98LSe(ASME), R98LSi(ASME)
ON - R50LSi, R75LSe, R75LSi
5
OFF - V53e, R63LSe, R75LSe, R75LSi,
R94LSe, R94LSi, R98LSe(ASME),
R98LSi(ASME)
ON - R50LSi
6
OFF position
Settings dependent on altitude
0-2000 ft
(0-610 m)
2001-5200 ft
(610-1585 m)
5201-7700 ft
(1585-2347 m)
7701-10200 ft
(2347-3109 m)
#2: OFF
#3: OFF
#2: OFF
#3: ON
#2: ON
#3: OFF
#2: ON
#3: ON
4
OFF - if using MC-91 controller
ON - if using MC-45 controller
5
OFF - 120ºF default temperature without a
controller
ON - 140ºF default temperature without a
controller
6
OFF position
7
OFF position - Used for low fire and high fire
settings. Refer to the gas pressure setting
procedure.
8
1
Rinnai Water Heater Service Manual
106
100000098 Rev B
Dip Switch Settings
VA Series (-UC Models; model name ends in –UC)
R75LSe-VA
R75LSi-VA
R94LSe-VA
R94LSi-VA
REU-VA2528WD-UC
REU-VA2528FFUD-UC
REU-VA2535WD-UC
REU-VA2535FFUD-UC
These models have a default maximum temperature of 120º F (49º C) and an option to increase the maximum
temperature to 140 ºF (60 ºC). Temperature settings from 125-140 ºF (52-60 ºC) are available by setting dip
switch 6 to ON in the SW1 bank of 8 dip switches. Other dip switch positions may be defined differently than for
the non -UC models.
SW2 Bank (present on replacement PC boards only)
SW1 Bank
OFF - “Long Flue”
ON - “Short Flue” and Outdoor Models
“Long flue” is defined as:
0 elbows and length is greater than 21 ft
1 elbow and length is greater than 15 ft
2 elbows and length is greater than 9 ft
1
2
3
Settings dependent on altitude
0-2000 ft
(0-610 m)
2001-5200 ft
(610-1585 m)
5201-7700 ft
(1585-2347 m)
7701-10200 ft
(2347-3109 m)
#2: OFF
#3: OFF
#2: OFF
#3: ON
#2: ON
#3: OFF
#2: ON
#3: ON
4
OFF - if using MC-91 controller
ON - if using MC-45 controller
5
OFF - 120ºF default temperature without a
controller
ON - 140ºF default temperature without a
controller
6
OFF - 120ºF maximum temperature without an
MCC-91 controller
ON - 140ºF maximum temperature without an
MCC-91 controller
7
8
1
OFF - Propane Gas
ON - Natural Gas
2
OFF - Outdoor model
ON - Indoor model
3
OFF position
4
OFF position
5
OFF position
6
OFF position
OFF position - Used for low fire and high fire
settings. Refer to the gas pressure setting
procedure.
Rinnai Water Heater Service Manual
107
100000098 Rev B
Dip Switch Settings
VB and Condensing Series
R75LSe-VB, R75LSi-VB, R94LSe-VB, R94LSi-VB, V53i, RC80HPi, RC80HPe, RC98HPe, RC98HPi
SW1 Bank
OFF - “Long Flue”
ON - “Short Flue” and Outdoor Models
“Long flue” is defined as:
0 elbows and length is greater than 21 ft
1 elbow and length is greater than 15 ft
2 elbows and length is greater than 9 ft
1
2
3
Settings dependent on altitude
0-2000 ft
(0-610 m)
2001-5200 ft
(610-1585 m)
5201-7700 ft
(1585-2347 m)
7701-10200 ft
(2347-3109 m)
#2: OFF
#3: OFF
#2: OFF
#3: ON
#2: ON
#3: OFF
#2: ON
#3: ON
4
OFF
5
OFF - 120ºF default temperature without a controller
ON - 140ºF default temperature without a controller
6
R75LSe-VB, R75LSi-VB, R94LSe-VB,
R94LSi-VB, RC80HPi, RC80HPe,
RC98HPe, RC98HPi*
OFF - 120ºF maximum temperature
without an MCC-91 controller
ON - 140ºF maximum temperature
without an MCC-91 controller
7
8
V53i
OFF - Propane
ON - Natural Gas
OFF position - Used for low fire and high fire settings. Refer
to the gas pressure setting procedure.
* R75LSe-VB, R75LSi-VB, R94LSe-VB,
R94LSi-VB, RC80HPi, RC80HPe,
RC98HPe, RC98HPi models have a
default maximum temperature of 120º F
(49º C) and an option to increase the
maximum temperature to 140 ºF (60 ºC).
Temperature settings from 125-140 ºF
(52-60 ºC) are available by setting dip
switch 6 to ON in the SW1 bank of 8 dip
switches.
SW2 Bank (present on replacement PC boards only)
Note: Not present on V53i PC boards.
1
OFF - Propane Gas
ON - Natural Gas
2
OFF - Outdoor model
ON - Indoor model
3
OFF - R75LSe-VB, R75LSi-VB, R94LSe-VB,
R94LSi-VB, RC98HPe, RC98HPi
ON - RC80HPi, RC80HPe
4
OFF position
5
OFF position
6
OFF position
Rinnai Water Heater Service Manual
108
100000098 Rev B
Notes
Rinnai Water Heater Service Manual
109
100000098 Rev B
Notes
Rinnai Water Heater Service Manual
110
100000098 Rev B
Notes
Rinnai Water Heater Service Manual
111
100000098 Rev B
100000098 Rev B
© 2011 Rinnai America Corporation
7/2011
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