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Safe Installation, Use and Service ........................... 2
Safety Precautions .................................................... 2
Safety Behaviors and Practices ............................ 3
Safety Features ..................................................... 3
Table of Contents ...................................................... 4
Product Warranty ...................................................... 5
Consumer Responsibilities ...................................... 6
Product Specifications ............................................. 7
Dimensions ................................................................ 8
Technical Data ........................................................... 9
Pressure Drop Curve ............................................ 9
Outlet Flow Data ................................................... 9
Installation Instructions .......................................... 10
General Instructions ............................................ 10
Clearances from Appliance ................................. 10
Attachment of the Water Heater ......................... 11
Electrical Connection .......................................... 11
Gas Supply ............................................................... 11
General Instructions ........................................... 11
Pipe Sizing Procedure- Example ...................... 12
Water Piping ............................................................. 13
General Instructions............................................ 13
Pressure Relief Valve.......................................... 13
Freeze Protection ........................................... 13-14
Recommended Piping For Basic Installation ...... 15
Recommended Piping For
Circulation Systems ............................................ 16
Optional Piping For Circulation Systems ............ 17
Vent Instructions ..................................................... 18
Intake / Exhaust Guidelines ................................ 18
Condensate ......................................................... 18
Maximum Vent Length ........................................ 18
Vent Products .......................................................... 19
Listed and Tested Vent Products for the 305 and
505 Models ......................................................... 19
Flue Terminal Clearances
(ANS Z21.10.3 • CSA 4.3) ................................. 19
Additional Clearances - Vent Terminal ................ 20
Flue Installation For 305 And 505 Models .......... 21
High Altitude Installations ...................................... 22
Connecting Multiple Water Heaters ....................... 22
Temperature Controller Installation ....................... 23
Location .............................................................. 23
Configurations ..................................................... 23
Cable Lengths And Size ..................................... 23
Mounting The Controller ..................................... 23
Description of Operation ........................................ 24
Operating Instructions ............................................ 24
Sequence of Operation ....................................... 24
Features Available on Temperature Controllers.. 24
Temperature Adjustment ........................................ 25
Temperature Ranges ........................................... 26
Setting the Controller to Mute ............................. 26
Operating Your Water Heater ................................. 27
Maintenance ............................................................. 28
Cleaning .............................................................. 28
Vent System ........................................................ 28
Motors ................................................................. 28
Temperature Controller ........................................ 28
Lime/Scale Build-up ............................................ 28
Snow Accumulation ............................................. 28
Visual Inspection of Flame .................................. 28
Troubleshooting ................................................. 29-31
Error Code Table ............................................ 29-30
Troubleshooting for Common Issues .................. 31
Accessing Operating Information ........................ 31
Water Quality ....................................................... 31
Flushing the Heat Exchanger
(Error Code: LC or 00) ........................................ 32
Wiring Diagram ........................................................ 33
Service and Adjustment ......................................... 34
Repair Parts List .................................................. 34
Kenmore Tankless Water Heater Accessories .... 34
Notes ......................................................................... 35
4 305 & 505 Indoor Manual