State Water Heaters SBD71120 How to use

COMMERCIAL GAS HIGH EFFICIENCY WATER HEATERS
Service Handbook
PRINTED IN THE U.S.A. 1016 100278164_2000536778
FOR MODELS:
SBD71120(N,P) through SBD100390(N,P)E
Series 118 & 119
INSTALLATION CONSIDERATIONS - PRE SERVICE CHECKS -
CONSTRUCTION - OPERATION & SERVICE - TROUBLESHOOTING
SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN
300 Maddox Simpson Parkway
Lebanon, TN 37090

1
TABLE OF CONTENTS
INTRODUCTION......................................................................................2
Qualications.................................................................................2
Service Warning ............................................................................ 2
Service Reminder..........................................................................2
Tools Recommended ....................................................................2
INSTALLATION CONSIDERATIONS .......................................................3
Instruction Manual.........................................................................3
Closed Water Systems..................................................................3
Thermal Expansion .......................................................................3
Air Requirements ..........................................................................3
Contaminated Air........................................................................... 3
VENTING..................................................................................................4
Power Vent Kits For Sidewall Venting ...........................................5
GAS SUPPLY SYSTEMS......................................................................... 6
Supply Gas Regulator ...................................................................6
Gas Piping.....................................................................................7
FEATURES AND COMPONENTS ...........................................................9
The Hydrocannon (Self-Cleaning System).................................... 9
Automatic Flue Damper ................................................................9
GAS CONTROL VALVE ..........................................................................10
White Rodgers Integrated Temperature Control Switch............... 11
Status LEDS................................................................................. 11
Electronic Ignition Control/ Ignition Module..................................12
SEQUENCE OF OPERATION FLOW CHART........................................ 13
TROUBLESHOOTING CHECKLIST ....................................................... 14
GENERAL SERVICE CHART .................................................................15
FAULT AND WARNING CODES .............................................................16
Step 1. Troubleshooting The Water Heaters ................................16
Flue Damper ................................................................................17
Efkal RVGP-KSF-Series Flue Damper Troubleshooting Guide..18
Step 2: Test For 24Vac Between Black And Orange On Damper PC
Board............................................................................................19
Step 3: Test the Three AMP FUSE...............................................19
Symptoms for a blown fuse..........................................................20
Symptoms for a working fuse.......................................................20
Step 4: Test For 24VAC Between Black And Yellow On Damper PC
Board............................................................................................21
Step 5: Wire Harness Test ...........................................................21
Step 6: IID Module Test (Power To The Pilot Valve)..................... 22
Step 7: Pilot Spark Test................................................................23
Step 8: Flame Rectication ..........................................................24
Step 9: IID Module Test................................................................25
Step 10: Main Burner Test............................................................ 26
WIRING DIAGRAM - 118/119 SERIES CONTROLS .............................. 27

2Servicing should only be performed by a Qualied Service Technician
INTRODUCTION
This Service Handbook covers the water heater Model and Series numbers listed on the front cover only.
The instructions and illustrations contained in this service handbook will provide you with troubleshooting
procedures to verify proper operation and diagnose and repair common service problems.
QUALIFICATIONS
QUALIFIED INSTALLER OR SERVICE AGENCY
Installation and service of this water heater requires ability equivalent to that of a Qualied Agency (as dened
by ANSI below) in the eld involved. Installation skills such as plumbing, air supply, venting, gas supply and
electrical supply are required in addition to electrical testing skills when performing service.
ANSI Z223.1 2006 Sec. 3.3.83: “Qualied Agency” - “Any individual, rm, 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 WARNING
If you are not qualied (as dened by ANSI above) and licensed or certied as required by the authority
having jurisdiction to perform a given task do not attempt to perform any of the procedures described in this
service handbook. If you do not understand the instructions given in this service handbook do not attempt to
perform any procedures outlined in this service handbook.
SERVICE REMINDER
When performing any troubleshooting step outlined in this service handbook always consider the wiring
and connectors between components. Perform a close visual inspection of all wiring and connectors to and
from a given component before replacement. Ensure wires were stripped before being crimped in a wire
connector, ensure wires are crimped tightly in their connectors, ensure connection pins in sockets and plugs
are not damaged or worn, ensure plugs and sockets are mating properly and providing good contact.
Failure to perform this critical step or failing to perform this step thoroughly often results in needless down
time, unnecessary parts replacement, and customer dissatisfaction.
TOOLS RECOMMENDED
• Instruction Manual that came with the water heater.
• All tools common to installation and service of commercial water heaters such as hand tools, screwdrivers,
pipe wrenches etc.
• Hex (Allen) wrench sizes: 5/32”, 1/8”, 1/4” and 5/16"
• Digital manometer: Range -20.00 to +20.00" W.C. Resolution - 0.01" W.C. Required to test supply gas
pressure.
• Digital Multi Meter; capable of measuring:
• AC/DC Voltage.
• Ohms.
• DC micro amps (μA).

3
Servicing should only be performed by a Qualied Service Technician
INSTALLATION CONSIDERATIONS
This section of the Service Handbook covers some of the critical installation requirements that, when
overlooked, often result in operational problems, down time and needless parts replacement. Costs to
correct installation errors are not covered under the limited warranty. Ensure all installation requirements and
instructions contained in the Instruction Manual that came with the water heater have been followed prior to
performing any service procedures.
INSTRUCTION MANUAL
Have a copy of the Instruction Manual that came with the water heater on hand for the model and series
number being serviced. Installation information given in this Service Handbook is not a complete installation
instruction. Installation information given in this Service Handbook has a limited focus as it applies to servicing
the water heater. This Service Handbook does not replace or supersede the Instruction Manual that came
with the water heater. Always refer to the Instruction Manual for complete installation instructions. If the
Instruction Manual is not on hand, copies can be obtained from the manufacturers web site or by calling the
technical support phone number shown on the back cover of this Service Handbook.
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements or such conditions as high line pressure, among
others, have installed devices such as pressure reducing valves, check valves, and back ow preventers.
Devices such as these cause the water system to be a closed system.
THERMAL EXPANSION
As water is heated, it expands (thermal expansion). As the volume of water grows there will be a corresponding
increase in water pressure due to thermal expansion. Thermal expansion can cause premature tank failure
(leakage). This type of failure is not covered under the limited warranty. Thermal expansion can also cause
intermittent Temperature-Pressure Relief Valve operation: water discharged from the valve due to excessive
pressure build up. This condition is not covered under the limited warranty. The Temperature-Pressure Relief
Valve is not intended for the constant relief of thermal expansion. A properly sized thermal expansion tank
must be installed on all closed systems to control the harmful effects of thermal expansion. Contact a local
plumbing service agency to have a thermal expansion tank installed.
AIR REQUIREMENTS
Carefully review the requirements for combustion and ventilation air in the Instruction Manual that came
with the water heater. Failure to meet these requirements when the water heater is installed or overlooking
their importance when servicing the water heater often results in needless down time, unnecessary parts
replacement, and customer dissatisfaction. An inadequate supply of air for combustion and ventilation can
cause recirculation of combustion products resulting in contamination that may be hazardous to life. Such
a condition often will result in a yellow, luminous burner ame, causing sooting of the combustion chamber,
burners and ue tubes and creates a risk of asphyxiation.
CONTAMINATED AIR
Combustion air that is contaminated can greatly diminish the life span of the water heater and water heater
components such as hot surface igniters and burners. Propellants of aerosol sprays, beauty shop supplies,
water softener chemicals and chemicals used in dry cleaning processes that are present in the combustion,
ventilation or ambient air can cause such damage.
Do not store products of this sort near the water heater. Air which is brought in contact with the water heater
should not contain any of these chemicals. If necessary, uncontaminated air should be obtained from remote
or outdoor sources.

4Servicing should only be performed by a Qualied Service Technician
VENTING
This section of the Service Handbook is not a complete venting installation instruction. Refer to the Instruction
Manual that came with the water heater; ensure the venting has been installed per all Instruction Manual
requirements. Costs to correct installation errors are not covered under the limited warranty.
The instructions in this section on venting must be followed to avoid choked combustion or recirculation of
ue gases. Such conditions cause sooting or risks of re and asphyxiation.
Heater must be protected from freezing downdrafts. Remove all soot or other obstructions from the chimney
that will retard a free draft.
Type B venting is recommended with these heaters. For typical venting application refer to Technical Data
Venting in the Instruction Manual. This water heater must be vented in compliance with all local codes, the
current revision of the National Fuel Gas Code (ANSI-Z223.1) and with the Category I Venting Tables.
If any part of the vent system is exposed to ambient temperatures below 40°F it must be insulated to prevent
condensation.
• Do not connect the heater to a common vent or chimney with solid fuel burning equipment. This practice
is prohibited by many local building codes as is the practice of venting gas red equipment to the duct
work of ventilation systems.
• Where a separate vent connection is not available and the vent pipe from the heater must be connected
to a common vent with an oil burning furnace, the vent pipe should enter the smaller common vent or
chimney at a point above the large vent pipe.
All SBD water heaters are classied by ANSI as category I (non-condensing, negative pressure venting)
appliances. They are approved for Type B venting. For larger applications, SBD model water heaters can be
common vented together either in a tapered manifold or constant size manifold. (Follow National Fuel Gas
Code requirements for sizing and installation.) SBD models may be common vented only with other category
I appliances. (See venting section in the National Fuel Gas Code).