Introduction; Qualifications; Service Warning; Important Service Reminder - A.O. Smith BTX-100 Service Handbook

ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL

INTRODUCTION

This Service Manual is designed to be an aid in servicing and troubleshooting the 96%
thermally efficient, 50 gallon, 100,000 Btu/hr residential and light duty commercial power
vent - power direct vent model water heaters listed on the cover of this manual.The
instructions, illustrations and procedures contained in this manual are used to verify proper
operation and to diagnose and repair common service problems.
This manual does not replace or supersede the Instruction Manual that came with the water
heater. Always refer to the Instruction Manual that came with the water heater for complete
installation instructions. If the Instruction Manual is not available copies can be obtained
from the manufacturers web site or by calling the technical support phone number shown on
the water heater labeling.
QUALIFICATIONS - QUALIFIED SERVICE AGENT
Servicing the products referenced in this manual requires the ability (in the field involved)
equivalent to that of a Qualified Service Agent as defined by the American National
Standards Institute (ANSI) below. Installation skills such as plumbing, air supply, venting,
gas supply, electrical supply are required in addition to diagnostic and electrical testing
skills.
ANSI Z223.1 2006 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 WARNING

If you are not qualified (as defined by ANSI above) and licensed or certified as required by
the authority having jurisdiction to perform a given task do not attempt to perform any of the
service or installation procedures described in this manual. If you do not understand the
instructions given in this manual or do not feel confident in your abilities to perform a given
task do not attempt to perform any procedures outlined in this manual.

IMPORTANT SERVICE REMINDER

When performing any troubleshooting step outlined in this Service Manual 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.
Technical Literature Department
Servicing should only be performed by a Qualified Service Agent
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