A.O. Smith Cyclone Xi User Manual

CYCLONE Xi COMMERCIAL GAS WATER HEATER
BTH 120 thru 500 SERVICE HANDBOOK
A.O. Smith – Technical Training Department 1 Ash
land City, Tennessee © 2009
Servicing should only be performed by a Qualified Service Agent 316586-000
Table of Contents
INTRODUCTION...................................................................2
QUALIFICATIONS................................................................2
TOOLS REQUIRED..............................................................3
GENERAL INFORMATION...................................................4
GAS PRESSURE SPECIFICATIONS ..................................4
INSTALLATION QUICK TIPS – BTH 120 and 150 GAS
PRESSURE .........................................................................5
ADJUSTMENT PROCEDURE: ............................................5
GAS PRESSURE .................................................................5
BTH120 AND 150 MODELS.................................................5
HIGH ALTITUDE INSTALLATIONS .....................................5
BTH 120 - 150 .....................................................................5
INSTALLATION QUICK TIPS - BTH 199 AND 250 GAS
PRESSURE .........................................................................6
ADJUSTMENT PROCEDURE:.............................................6
GAS PRESSURE .................................................................6
BTH 199 AND 250 MODELS ...............................................6
HIGH ALTITUDE INSTALLATION........................................6
INSTALLATION QUICK TIPS - BTH 300,400,500 GAS
PRESSURE..........................................................................7
ADJUSTMENT PROCEDURE:.............................................7
GAS PRESSURE..................................................................7
BTH 300,400,500..................................................................7
HIGH ALTITUDE ADJUSTMENT .........................................7
BTH 300,400,500..................................................................7
INSTALLATION QUICK TIPS - BTH 300,400,500 ...............8
INSTALLATION – VENTING CATEGORY AND
MATERIALS..........................................................................9
VENTING TABLES BTH 120 – 250....................................10
VENTING TABLES BTH 300,400,500...............................10
CONCENTRIC VENTING...................................................11
VENT CONDENSATION.....................................................12
VENTING - ALL MODELS – SINGLE PIPE POWER VENT –
USING ROOM AIR..............................................................13
VENTING – ALL MODELS – TWO PIPE DIRECT VENT –
USING OUTSIDE AIR.........................................................14
VENT TERMINATION – DIRECT VENT – ALL MODELS. .15
DIRECT VENTING – ALL MODELS...................................16
CONTROL OVERVIEW .....................................................17
ADJUSTING TANK TEMPERATURE – OPERATING SET
POINT - DIFFERENTIAL....................................................18
CHANGING THE DISPLAY UNITS.....................................19
FAULT AND WARNING CONDITIONS – ADVANCED
DIAGNOSTIC INFORMATION............................................20
ACCESS TO THE CURRENT FAULT OR WARNING.......21
FAULT CODES...................................................................22
VIEWING THE FAULT HISTORY - VIEWING
INFORMATION ABOUT THE HEATER..............................23
CONTROL SEQUENCE (TYPICAL ALL MODELS).........24
CONTROL SEQUENCE FLOW CHART.............................25
CONTROLS – CENTRAL CONTROL BOARD – CCB ......26
CONTROLS – GAS VALVE BTH 120.................................27
CONTROLS – GAS VALVE BTH 150.................................27
CONTROLS – GAS VALVE BTH 199 and 250...................28
ADJUSTMENT PROCEDURE:...........................................28
GAS PRESSURE ...............................................................28
BTH 199 AND 250 MODELS .............................................28
CONTROLS – GAS VALVE BTH 199 and 250...................29
CONTROLS – GAS VALVE , ORIFICE CHART–
BTH300/400,.......................................................................30
CONTROLS – GAS VALVE , ORIFICE CHART– BTH 500 31
CONTROLS – PRESSURE SWITCHES – ALL MODELS..32
CONTROLS – PRESSURE SWITCHES – BTH 120 through
250......................................................................................33
CONTROLS – PRESSURE SWITCHES – BTH 300,400,500
............................................................................................34
CONTROLS – CONNECTIONS, IGNITER, FLAME
SENSOR, SIGHT GLASS, POWERED ANODES..............35
HOT SURFACE IGNITER / FLAME SENSOR / CONTROL
TIMING................................................................................36
BLOWER SPEED CONTROL BTH 199 AND 250..............37
VARIABLE FREQUENCY DRIVE – BTH 400 and 500.......38
VARIABLE FREQUENCY DRIVE - BLOWER SPEED AND
PRESSURE READINGS.....................................................39
WIRING DIAGRAM – BTH 120 – 300 ................................40
WIRING DIAGRAM – BTH 400,500....................................41

A.O. Smith Cyclone Xi Specifications

General

Brand	A.O. Smith
Model	Cyclone Xi
Category	Water Heater
Language	English