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Rinnai Sensei N-Series User Manual
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114
11/6/2018
© 2015
Rinnai America Corporation
PROPRIETARY
and CO
NFIDENTIAL
Enha
ncing Lives By
Changing
The W
ay W
ater
Is Heated
Servicing or Replacing a Cascading Unit
While servicing
or replacing a
unit using Rinnai
’
s
cascade
s
ys
tem
you MU
ST isolat
e that unit fr
om
the s
yst
em. Follo
w the
st
eps noted
to the righ
t and
f
ollo
wing
slide.
113
115
Table of Contents
Product Changes
2
Product View
6
Residential Models
7
Commercial Models
8
Important Information
9
Before Performing Service
11
Primary Service Tools
12
Front Panel Removal
13
Controller Information
14
Flame Rod, Electrode and Sight Grass Removal
16
Heat Exchanger Thermistor Removal
18
Outgoing Water Thermistor Removal
20
Bi-Metal over Heat Switch
22
Overheat Safety Protection
23
Combustion Fan/Gas Valve Removal
25
Heat Exchanger Assembly
27
Heat Exchanger Assembly Removal
28
Instructions for Heat Exchanger Replacement
31
Air Box Removal
33
Air Box Removal
34
Primary/Secondary Heat Exchanger Disassembly
36
Burner Disassembly
38
Water Flow Servo (WFSV) Valve Removal
40
Bypass Valve Assembly
42
Flow Turbine Removal from Bypass Valve
43
Condensate Trap Removal
45
Board Removal
46
PC Board Removal
47
Product Reassembly
48
Accessory Connections
49
Optional Accessory Harnesses/Connector Locations
50
Electrical Diagnostic Points
52
Key Points When Troubleshooting Electrical Values
52
Power Supply
53
Power Supply Fuse
54
Pump Circuit Fuse
55
Overheat Switch
56
Main Gas Solenoid Valve
57
Combustion Fan
58
Outgoing Water Thermistor
59
Inlet Water Thermistor
60
Water Flow Control Device
61
Exhaust Temperature Thermistor
62
Heat Exchanger Thermistor
63
Water Flow Sensor
64
Freeze Protection Thermistor
65
By-Pass Flow Control Valve
66
Venturi Control Device Servo
67
Spark Electrode
68
Additional Controller(S)
69
Freeze Protection Heater Circuit
70
Maintenance Diagnostic Codes/Diagram
72
Electrical Input Ratings
73
Electrical Requirements
73
Controller (Maintenance Monitor Functions)
74
To Enter the Maintenance Monitor Display Mode
74
Fault Codes
76
Warranty
82
Limited Warranty
83
Maintenance
84
Cleaning
85
Heat Exchanger Flush Procedure
86
Water Recommendations
87
Gas Requirements
88
Gas Supply - Troubleshooting
89
Gas Conversion Process
91
Parameter Adjustment
94
Adjusting Parameters
96
Parameter Setting Table
98
Adjust Maximum Temperature
100
Adjust Altitude
101
Adjust Maximum Flow Rate
103
To Obtain Performance Data
105
Performance Data Details
106
Maximum Vent Length Quick Reference
108
Cascading Multiple Units
110
Programming Cascade Communication
112
Servicing or Replacing a Cascading Unit
114
Voltage and Resistance Values
116
Electrical Diagnostic Points
117
4
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Rinnai Sensei N-Series Specifications
General
Brand
Rinnai
Model
Sensei N-Series
Category
Water Heater
Language
English
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