Rheem 874W27NF - Table of Contents

2
TM061 Rheem 27 Water Star Service Instructions – Issued: 11/10
REV A Issued 08/13
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
CONTENTS
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 24 .................................................................................................................... 35
Error Code 29 .................................................................................................................... 35
Error Code 31, 32, 33 & 34 ................................................................................................ 36
Error Code 35 .................................................................................................................... 36
Error Code 51 .................................................................................................................... 37
Error Code 52 .................................................................................................................... 38
Error Code 61 .................................................................................................................... 38
Error Code 65 .................................................................................................................... 39
Error Code 66 .................................................................................................................... 39
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 .................................................................................................................... 44
WATER SAVING FAULT FINDING ................................................................................... 45
BURNER GAS PRESSURE CHECK ................................................................................. 48
COMPONENT REPLACEMENT PROCEDURE ................................................................ 49
DOCUMENT REVISION HISTORY ................................................................................... 61