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874W27NF
Rheem 874W27NF User Manual
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6
TM061 Rheem 27 W
ater Star Servic
e Instructions
–
Issued: 11/
10
REV A Issued 08/
13
This document is s
tored and maintai
ned electronicall
y by
Service. Al
l printe
d copies not
bearing this stateme
nt in RED are d
eemed “uncontroll
ed”
WIRING DIAGRAM
A wiring diagram is also located on the inside of the front cover panel.
5
7
Table of Contents
Service Instructions
1
Table of Contents
2
Introduction
3
Safety Warning
3
Water Heater Model Identification
4
Specifications
5
Wiring Diagram
6
Preset Temperature Adjustment
7
Sequence of Operation
8
Bypass Operation
9
Anti-Frost Heater Circuit
9
Components and Their Function
10
In-Series Gas Boosting
12
Remote Temperature Controllers
12
Ez-Link System
12
Tempering Valves
12
Maintenance Information
13
Operational Flow Charts
16
Error Codes
19
Thermistor Resistance Chart
22
Fault Finding
22
Fault Diagnosis Sequence
23
Power Supply Fault-Finding
24
No Error Code Fault Finding
26
Error Code 11
28
Error Code 12
32
Error Code 14
33
Error Code 15
33
Error Code 16
34
Error Code 31, 32, 33 & 34
34
Error Code 24
35
Error Code 29
35
Error Code 35
36
Error Code 51
37
Error Code 52
38
Error Code 61
38
Error Code 65
39
Error Code 66
39
Fault Finding Tests
40
Error Code 71
41
Error Code 72
41
Error Code 76
41
Error Code 79
42
Error Code 80
42
Error Code 82
43
Error Code 99
44
Warning Code 10
44
Water Saving Fault Finding
45
Burner Gas Pressure Check
48
Component Replacement Procedure
49
Document Revision History
61
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Rheem 874W27NF Specifications
General
Brand
Rheem
Model
874W27NF
Category
Water Heater
Language
English
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