Rinnai R85i User Manual

Tankless Water Heater
Service Manual
Key to Trade Names in this Manual:
R/C Indicates both the residential and
commercial versions. R/C42e includes
R42e and C42e.
RC Indicates condensing water heater models.
(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.
Model with
valves in carton
Equivalent Model
RV53e V53e
RV53i V53i
RL75e R75LSe-VB
RL75i R75LSi-VB
RL94e R94LSe-VB
RL94i R94LSi-VB
RC80e RC80HPe
RC80i RC80HPi
RC98e RC98HPe
RC98i RC98HPi
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.
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
R94LSi-VB
20 34 47 51 56 63 76
V53i
20 35 43 51 56 63 76
R98LSe(ASME)
22 36 45 52 58 67 80
R98LSi(ASME)
22 36 45 52 58 67 82
RC80HPe
24 37 47 53 56 68 85
RC80HPi
24 37 47 53 56 68 88
RC98HPe
26 38 48 53 56 68 91
RC98HPi
26 38 48 53 56 68 94
DIAGNOSTICS
WIRE DIAGRAM
GAS CONTROL
FAN
PC BOARD
WATER FLOW
CONTROL
HEAT
EXCHANGER
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.
100000098 Rev B

Rinnai R85i Specifications

General

Brand	Rinnai
Model	R85i
Category	Water Heater
Language	English

Summary

Key to Trade Names

Model Designations

Explains R/C, RC, PLUS, ASME, and -VA/-VB suffixes in model names.

General Information

Safety Definitions

Explains safety alert symbols like DANGER, WARNING, CAUTION for potential hazards.

Using this Manual

Guidance on performing repairs and referencing additional manuals.

Technical Support

Information on contacting Rinnai Technical Services for assistance.

Recommended Tools

Lists essential tools for servicing and maintenance tasks.

Specifications

V Series - Commercial - Outdoor

Technical specifications for commercial outdoor V Series models.

V Series - Commercial - Indoor

Technical specifications for commercial indoor V Series models.

V Series - Residential - Outdoor

Technical specifications for residential outdoor V Series models.

V Series - Residential - Indoor

Technical specifications for residential indoor V Series models.

Diagnostic Codes

Accessing Operating Information

Instructions for displaying error codes and operational data on MC-91/MCC-91 controllers.

Operation Sequence

Describes the operational sequence: Water Flow Begins, Firing Sequence, Normal Operation, Shut-down, Standby.

Diagnostic Codes and Remedies (02-16)

Additional Diagnostic Codes and Remedies (25-LC)

Electrical Diagnostic Points for R/C42e, R/C53e

Component Diagnostics Overview

Diagnostic points for Transformer, Gas Valve, Solenoids, Water Flow Servo, Sensor, Ignition, and Fan Motor.

Thermal Fuse, Flame Rod, and Thermistors (R/C42e, R/C53e)

Surge Protector, Controller, Frost Protection, and Fuses

Diagnostic points for surge protector, controller, frost protection, and fuses.

Electrical Diagnostic Points for R70e, R/C85e(PLUS), R/C53i(PLUS), R/C85i(PLUS)

Component Diagnostics Overview

Diagnostic points for Transformer, Gas Valve, Solenoids, Water Flow Servo, Sensor, Bypass Control, Ignition, and Fan Motor.

Thermal Fuse, Flame Rod, and Thermistors (R70e, etc.)

Surge Protector, Controller, Frost Protection, and Fuses

Diagnostic points for surge protector, controller, frost protection, and fuses.

Electrical Diagnostic Points for R/C98e(ASME), R/C98i(ASME)

Component Diagnostics Overview

Diagnostic points for Solenoids, Water Flow Servo, Sensor, Bypass Control, Ignition, and Fan Motor.

Thermal Fuse, Overheat Switch, and Flame Rod (R/C98e, etc.)

Thermistors, Surge Protector, Controller, Frost Protection, and Fuses

Diagnostic points for thermistors, surge protector, controller, frost protection, and fuses.

Electrical Diagnostic Points for V53e, R63LSe

Component Diagnostics Overview

Diagnostic points for Solenoids, Water Flow Servo, Sensor, Ignition, and Fan Motor.

Thermal Fuse, Overheat Switch, Flame Rod, and Thermistors (V53e, R63LSe)

Surge Protector, Controller, Frost Protection, and Fuses

Diagnostic points for surge protector, controller, frost protection, and fuses.

Electrical Diagnostic Points for R50LSI, R63LSe2, R75LSe-VA, R75LSI-VA, R94LSe-VA, R94LSI-VA

Component Diagnostics Overview

Diagnostic points for Solenoids, Water Flow Servo, Sensor, Bypass Control, Ignition, and Fan Motor.

Thermal Fuse, Overheat Switch, Flame Rod, and Thermistors (R50LSI, etc.)

Surge Protector, Controller, Frost Protection, and Fuses

Diagnostic points for surge protector, controller, frost protection, and fuses.

Electrical Diagnostic Points for V53i, R75LSe-VB, R75LSi-VB, R94LSe-VB, R94LSI-VB

Thermistors and Frost Protection

Diagnostic points for thermistors and frost protection heaters.

Amp Fuses and Flame Rod

Guidance on checking amp fuses and diagnostic points for flame rod.

Control and Power Components

Diagnostic points for controller, surge protector, power cord, and ignitor.

Solenoid Valves

Diagnostic points for various solenoid valves.