Table of Contents
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Table of Contents
Related Manuals for A.O. Smith Cyclone XL BTHS 1000A
Summarization of Contents
Introduction
Qualifications
Defines the required qualifications for installing and servicing the water heater.
Service Warning
Advises users not to perform procedures if unqualified or unlicensed by the jurisdiction.
Service Reminder
Emphasizes checking wiring and connectors thoroughly to avoid downtime and unnecessary part replacement.
Tools Recommended
Lists essential tools for installation and service, including specific wrenches and measurement devices.
Installation Considerations
Instruction Manual
Stresses the importance of having the Instruction Manual for model-specific installation details.
Thermal Expansion
Explains thermal expansion in closed systems and its potential to cause tank failure or valve issues.
Air Requirements
Highlights the critical need to meet combustion and ventilation air requirements for proper operation.
Features and Components
Top View
Identifies key components visible from the top of the water heater unit.
Fault and Alert Codes
Low Gas Pressure
Describes issues related to insufficient gas supply pressure and checks required.
Ignition Failure
Covers causes and troubleshooting for the burner failing to ignite or flame sensor not detecting.
Flame Sensor Error
Details errors where the flame sensor detects flame when the gas valve should be off.
No Water
Explains errors indicating no water detected by the powered anode, often due to low water or wiring issues.
Venting
General Venting Information
Provides overview of Category IV appliances and vent configurations (Power Vent, Direct Vent).
Direct Vent Configuration
Details direct vent setup drawing combustion air from outdoors and exhausting flue gases outdoors.
Pipe Size Requirements
Emphasizes using correct pipe size for intake air and vent piping length for proper operation.
Electrical Connections – All Models
Power Supply Connections
Details the proper connection of the 120 VAC power supply to the unit's junction box.
Power Fluctuations and Electrical Noise
Warns about voltage fluctuations and electrical noise affecting control system operation.
Dedicated Power Wiring and Breakers
Recommends dedicated wiring and breakers to reduce electrical line noise for stable operation.
Operation and Service
How It Works
Explains the water heater's operational principle, including heat exchanger and burner function.
Combustion Blower
Describes the combustion blower assembly and its control via the Central Control Board (CCB).
Modulation
Explains the water heater's ability to modulate firing rate based on temperature and draw.
Combustion Blower and Burner Removal/Installation
Combustion Blower/ Burner Removal
Provides step-by-step instructions for safely removing the combustion blower and burner assembly.
Combustion Blower/ Burner Installation
Details the procedure for reinstalling the combustion blower and burner assembly.
CCB Connection Identification
J1 Socket - High Voltage In
Identifies pins for high voltage input connections to the CCB.
J3 Socket - UIM
Details the pin connections between the CCB and the User Interface Module (UIM).
J4 Socket - Flue Probe & Flow Switch
Maps pins for flue probe and flow switch connections to the CCB.
J5 Socket - Blower Logic
Specifies pin assignments for blower logic and speed control signals from the CCB.
J9 Socket - Temperature Probe
J12 Socket - Configuration Key
Identifies the socket for the configuration key used by the CCB.
J13 Socket - CPAM
Details the connection for the CPAM (Commercial Power Anode Module) to the CCB.
J15 Socket - Pressure Switches
Maps pin connections for various pressure switches to the CCB.
Control Overview
UIM (User Interface Module)
Explains the function and display of the User Interface Module for interaction and monitoring.
ICOMM Remote Monitoring System
Describes the iCOMM system for remote management of water heaters via smartphone or tablet.
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