State Water Heaters SUF 130 THRU 500 User manual

MODELS: SUF 60 thru 120
SUF 100 thru 250
SUF 130 thru 500
SERIES 100, 101 and 104.
500 Tennessee Waltz Parkway
Ashland City, TN 37015
PRINTED IN THE U.S.A. 0511 198152-003
SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE AGENT
Service Handbook
COMMERCIAL GAS HIGH EFFICIENCY WATER HEATERS

1
Servicing should only be performed by a Qualied Service Agent
TABLE OF CONTENTS
INTRODUCTION ......................................................................2
QUALIFICATIONS .....................................................................2
TOOLS REQUIRED ....................................................................3
GENERAL INFORMATION...............................................................4
GAS PRESSURE SPECIFICATIONS ......................................................4
INSTALLATION QUICK TIPS – SUF 120 AND 150 GAS PRESSURE .............................5
INSTALLATION QUICK TIPS – SUF 199 AND 250 GAS PRESSURE .............................7
INSTALLATION QUICK TIPS – SUF 300, 400, 500 GAS PRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
INSTALLATION QUICK TIPS – SUF 300, 400, 500............................................9
INSTALLATION – VENTING CATEGORY AND MATERIALS ...................................10
VENTING TABLES – SUF 120 - 250 ......................................................11
VENTING TABLES – SUF 300, 400, 500...................................................11
CONCENTRIC VENTING...............................................................12
VENT CONDENSATION ...............................................................13
VENTING – ALL MODELS – SINGLE PIPE POWER VENT – USING ROOM AIR ...................14
VENTING – ALL MODELS – TWO PIPE DIRECT VENT – USING OUTSIDE AIR ...................15
VENT TERMINATION – DIRECT VENT – ALL MODELS ......................................16
DIRECT VENTING – ALL MODELS .......................................................17
CONTROL OVERVIEW ................................................................18
ADJUSTING TANK TEMPERATURE – OPERATING SET POINT – DIFFERENTIAL.................20
CHANGING THE DISPLAY UNITS .......................................................22
FAULT AND WARNING CONDITIONS – ADVANCED DIAGNOSTIC INFORMATION ................24
ACCESS TO THE CURRENT FAULT OR WARNING .........................................25
FAULT CODES.......................................................................26
VIEWING THE FAULT HISTORY – VIEWING INFORMATION ABOUT THE HEATER................27
CONTROL SEQUENCE (TYPICAL ALL MODELS) ...........................................28
CONTROL SEQUENCE FLOW CHART ...................................................29
CONTROLS – CENTRAL CONTROL BOARD – CCB .........................................30
CONTROLS – GAS VALVE SUF 120......................................................32
CONTROLS – GAS VALVE SUF 150......................................................32
CONTROLS – GAS VALVE SUF 199 AND 250 ..............................................33
CONTROLS – GAS VALVE SUF 199 AND 250 ..............................................34
CONTROLS – GAS VALVE, ORIFICE CHART – SUF 300/400..................................35
CONTROLS – GAS VALVE, ORIFICE CHART – SUF 500 .....................................36
CONTROLS – PRESSURE SWITCHES – ALL MODELS ......................................37
CONTROLS – PRESSURE SWITCHES – SUF 120 THROUGH 250 .............................38
CONTROLS – PRESSURE SWITCHES – SUF 300, 400, 500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
CONTROLS – CONNECTIONS, IGNITER, FLAME SENSOR, SIGHT GLASS, POWERED ANODES ...40
HOT SURFACE IGNITER / FLAME SENSOR / CONTROL TIMING ..............................41
BLOWER SPEED CONTROL SUF 199 AND 250 ............................................42
VARIABLE FREQUENCY DRIVE – SUF 400 AND 500 ........................................43
VARIABLE FREQUENCY DRIVE – BLOWER SPEED AND PRESSURE READINGS................44
WIRING DIAGRAM – SUF 120 - 300......................................................45
WIRING DIAGRAM – SUF 400, 500 ......................................................46

2Servicing should only be performed by a Qualied Service Agent
INTRODUCTION
The service handbook is designed to aid in servicing and troubleshooting State Water Heaters Ultra Force
SUF commercial water heaters in the field. No duplication or reproduction of this book may be made
without the express written authorization of the State Water Heaters.
The following text and illustrations will provide you with a step by step procedure to verify proper
installation, operation, and troubleshooting procedures. Additional quick reference data is included to assist
you in servicing these products.
The information contained in this handbook is designed to answer commonly faced situations encountered
in the operation of this product line and is not meant to be all inclusive. If you are experiencing a problem
not covered in this handbook, please contact State Water Heaters Technical Information at 1-800-365-
0024, by email at [email protected], or your local State Water Heaters representative for further
assistance. Our website at: www.statewaterheaters.com is also a resource for installation and service
information. This handbook is intended for use by licensed plumbing professionals and reference should
be made to the installation manual accompanying the product. This handbook contains supplemental
information to the product’s installation and operation manual.
QUALIFICATIONS
ANSI Z223.1 Sec 3.3.83
“Qualified Agency”
“Any individual, firm, corporation or company that either in person or through a representative is engaged
in and is responsible for (a) the installation, testing or replacement of gas piping or (b) the connection,
installation, testing, repair or servicing of appliances and equipment; that is experienced in such work; that
is familiar with all precautions required; and that has complied with all the requirements of the authority
having jurisdiction.”
Service of this water heater requires ability equivalent to that of a Qualified Service Agent (licensed
tradesman) in the field involved. Installation skills such as plumbing, air supply, venting, gas supply,
electrical supply are required in addition to electrical testing skills. Some products may require combustion
testing equipment and certification. If you do not possess these skills or do not have the proper tools you
should not attempt to service this water heater.

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Servicing should only be performed by a Qualied Service Agent
TOOLS REQUIRED
• ELECTRICAL MULTIMETER CAPABLE OF MEASURING CONTINUITY/ OHMS, AC & DC VOLTS,
AMPERES, MICROAMPERES, MILLIVOLTS, and FREQUENCY (Hz)
• UEi Model DL289 or equivalent
• DIGITAL MANOMETER + 60" W. C. in .01" increments
Note: A digital manometer is required for testing pressure switches and can replace a gas pressure
gauge, draft gauge or slack tube manometer for checking gas pressure.
• UEi model EM200 or equivalent
• WATER PRESSURE GAUGE w/LAZY HAND AND HOSE BIBB CONNECTION
• THERMOMETER
• 1-1/16 INCH SOCKET WITH EXTENSION FOR ANODE REPLACEMENT
• SET OF NUMBERED DRILL BITS
DIGITAL MANOMETER DIGITAL MULTIMETER
WATER PRESSURE
TEST GAUGE W/LAZY
HAND AND HOSE BIBB
CONNECTION