User Guide

2
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
TABLE OF CONTENTS
Safety Symbols ....................................................2
Warnings ..............................................................3
Introduction ...........................................................3
Product Description ..............................................3
Voltage Rating Tables ...........................................4
Installation Procedure ...........................................5
Design of Water Circulating System .....................6
Connecting Supply and Return Piping..................6
Connecting Electrical Power Supply.....................8
Wiring Diagrams ................................................. 11
Thermostat Installation .......................................15
Startup and Seasonal Maintenence ................... 15
Troubleshooting ..................................................16
Maintenance ...................................................... 17
Parts List - 2 Element Electric Boilers ............... 18
Parts List - 4 Element Electric Boilers ................ 19
Additional Wiring Diagrams ................................20
Modular Boiler Piping ......................................... 23
Troubleshooting ..................................................24
"AT" Series Boiler Dimensions ........................... 27
Homeowner's Reference Table ..........................28
KEEP THIS MANUAL NEAR BOILER
RETAIN FOR FUTURE REFERENCE
16027 Tested For 30 LBS.
ASME
Working Pressure
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SAFETY SYMBOLS
The following dened symbols are used throughout
this manual to notify the reader of potential hazards
of varying risk levels.
DANGER
Indicates an imminently hazardous situation
which, if not avoided, WILL result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation
which, if not avoided, COULD result in death
or serious injury.
CAUTION
Indicates a potential hazardous situation
which, if not avoided, MAY result in minor or
moderate injury. It may also be used to alert
against unsafe practices.
IMPORTANT: Read the following instructions
COMPLETELY before installing!!