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2 305, 505, 705 Indoor Manual
Specifications ..................................................... 3
Consumer Safety Information
Safety Definitions ............................................. 4
Safety Behaviors and Practices ....................... 4
Safety Features ............................................... 4
Description of Operation ................................... 5
Operating Instructions
Features Available on Temperature
Controllers ....................................................... 5
Setting the Temperature .................................. 6
Temperature Options Without
a Temperature Controller ................................ 6
Temperature Ranges ....................................... 7
Setting Controller to Mute ................................ 7
Maintenance
Cleaning ...................................................... 8
Vent System ................................................ 8
Motors ......................................................... 8
Temperature Controller ............................... 8
Lime / Scale Build-up .................................. 8
Snow Accumulation..................................... 8
Visual Inspection of Flame .......................... 8
Error Codes
Error Code Table ....................................... 9, 10
Trouble Shooting for Common Issues ........... 11
Accessing Operating Information .................. 11
Water Quality ................................................. 11
Flushing the Heat Exchanger ........................ 12
(Error Code: LC or 00)
Installation Instructions ................................... 13
General Instructions ...................................... 13
Clearances from Appliance ........................... 14
Attachment of the Water Heater .................... 14
Electrical Connection ..................................... 15
Gas Piping
General Instructions ................................ 15
Pipe Sizing Procedure - Example ........... 16
Water Piping
General Instructions ................................ 17
Pressure Relief Valve .............................. 17
Freeze Protection .................................... 17
Freeze Protection Piping ............................... 18
Recommended Piping for Basic Installation .. 19
Recommended Piping for
Circulation Systems ....................................... 20
Optional Piping for Circulation Systems ........ 21
Venting Instructions
Intake / Exhaust Guidelines .................... 22
Condensate ............................................. 22
Maximum Vent Length ............................ 23
Venting Products ........................................... 24
Flue Terminal Clearances
(ANS Z21.10.3 ● CSA 4.3
) ............................ 25
Additional Clearances - Vent Terminal .......... 26
Flue Installation for 305 and 505 Models ...... 27
Flue Installation for 705 Model ................ 28, 29
High Altitude Installation ................................ 30
Connecting Multiple Water Heaters ............... 30
Temperature Controller Installation
Location ................................................... 31
Configurations ......................................... 31
Cable Lengths and Size .......................... 31
Mounting the Controller ........................... 32
Operating Instructions ................................... 33
Technical Data
Pressure Drop Curve ..................................... 34
Outlet Flow Data ............................................ 34
Space Heating ............................................... 35
Dimensions .................................................... 36
Ladder Diagram ............................................. 37
Warranty ...................................................... 38, 39
Table of Contents