Rheem II Series User Manual

TM090 12-26 Series II CFGWH Service Instructions
REV AB – Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed “uncontrolled”
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CONTENTS
INTRODUCTION ................................................................................................................. 3
SAFETY WARNING............................................................................................................. 3
Live Testing ...................................................................................................................... 3
Touch Voltage Testing ..................................................................................................... 4
WATER HEATER MODEL IDENTIFICATION ..................................................................... 5
SPECIFICATIONS ............................................................................................................... 5
WIRING DIAGRAM .............................................................................................................. 8
PRESET TEMPERATURE ADJUSTMENT ......................................................................... 9
FINE TEMPERATURE ADJUSTMENT ................................................................................ 9
SEQUENCE OF OPERATION ........................................................................................... 10
ANTI-FROST HEATER CIRCUIT ...................................................................................... 12
IN-SERIES GAS BOOSTING ............................................................................................ 12
TEMPERING VALVES ....................................................................................................... 13
REMOTE CONTROLLERS ................................................................................................ 14
BATH FILL OPERATION ................................................................................................... 19
HOW TO FAULT FIND ...................................................................................................... 21
OPERATIONAL FLOW CHARTS ...................................................................................... 23
ERROR CODES ................................................................................................................ 26
DIAGNOSTIC TEST POINTS ............................................................................................ 27
MAINTENANCE INFORMATION ....................................................................................... 28
CLEARING ERROR CODE HISTORY .............................................................................. 30
RESETTING ERROR CODES ........................................................................................... 31
Test Equipment .............................................................................................................. 31
FAULT FINDING ................................................................................................................ 32
Fault Diagnosis Sequence ............................................................................................. 38
Fault Finding Chart 1 ...................................................................................................... 39
Fault Finding Chart 2 ...................................................................................................... 40
Fault Finding Chart 3 ...................................................................................................... 41
Fault Finding Chart 3.1 ................................................................................................... 42
Fault Finding Chart 3.2 ................................................................................................... 43
Fault Finding Charts 3.3 & 3.5 ........................................................................................ 44
Fault Finding Chart 3.6 ................................................................................................... 45
Fault Finding Chart 3.7 ................................................................................................... 46
Fault Finding Charts 4 and 4.1 ....................................................................................... 46
Fault Finding Chart 5 ...................................................................................................... 47
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Fault-Finding ....................................................................................................... 48
BURNER GAS PRESSURE CHECK ................................................................................. 50
COMPONENT REPLACEMENT PROCEDURES ............................................................. 52
DOCUMENT REVISION HISTORY ................................................................................... 60

Rheem II Series Specifications

General

Category	Water Heater
Series	II Series
Type	Electric
Energy Factor	0.95
Voltage	240V
Wattage	4500-5500W
Warranty	6 years
Diameter	22 inches
Capacity	40-80 gallons