Table of Contents
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SECTION 1
1.1 Introduction .......................................................... 1
1.1 Included with the Appliance ................................... 1
SECTION 2
2.1 Model Nomenclature ................................................ 2
2.2 Specifications ...........................................................3
2.3 Dimensions ..............................................................4
2.4 Names of Components ............................................ 5
SECTION 3
3.1 Safety Symbols ..................................................... 6
3.2 Safety Precautions and Proper Use ...................... 8
SECTION 4
4.1 Location and Clearances ....................................... 10
4.2 Wall Mount Bracket ................................................. 11
4.2.1 Installation Height and Location ................. 11
4.2.2 Hang the Water Heater .............................. 11
4.3 Combustion Air .......................................................12
4.3.1 Combustion Air from Room .......................... 12
4.3.2 Ducted Combustion Air ................................ 12
4.4 Venting (exhaust) ...................................................14
4.5 General Location Guideline ................................... 15
4.6 Locations for Vent Pipe Terminator ........................ 15
4.6.1 Direct Venting Clearances ........................... 16
4.6.2 Non-Direct Venting Clearances ..................... 17
4.7 Air / Vent Connections at the Appliance ................. 20
4.7.1 Vent / Air Pipe Lengths ................................. 20
4.7.2 Direct Venting ............................................... 20
4.7.3 Indoor Combustion Air ................................. 21
4.8 Vent / Air Pipe Termination ..................................... 21
4.9 Gas Supply and Piping .......................................... 23
4.10 Gas Supply Pressure ............................................ 26
4.11 Gas Set Up and Adjustment .................................. 26
4.12 Gas High Altitude Setting ...................................... 27
4.13 Natural Gas to Propane Conversion ..................... 28
4.14 Plumbing Guideline ............................................... 32
4.15 Disposal of Condensate ........................................ 33
4.16 Pressure Relief Valve ............................................ 34
TABLE OF CONTENTS
4.17 Electrical Wiring Connections ............................... 34
4.18 DIP Switches .........................................................35
4.19 Control Board, Electrical Diagram ........................ 36
4.20 Ladder Diagram ....................................................37
4.21 Electrical Connections .......................................... 38
SECTION 5
5.1 Control Dial and Buttons ....................................... 40
5.2 LCD Overview ....................................................... 41
5.3 Operating Mode .................................................... 42
5.5 Status Display Mode ........................................... 43
5.4 DHW Set Point Change Mode .............................. 44
5.6 Installer Mode ...................................................... 45
5.7 Error Mode .......................................................... 46
SECTION 6
6.1 Error Codes ......................................................... 47
6.2 Fault Tree Analysis .............................................. 50
SECTION 7
Trouble Shooting
7.1 Diagnostics .......................................................... 52
7.1 Failure Modes ..................................................... 53
Maintenance
8.1 Annual Startup and General Maintenance .......... 56
SECTION 9
9.1 Quick View .......................................................... 57
9.2 Final Check Lists ................................................. 57
Repair Part Diagram
10.1 Part List ............................................................... 62
10.2 Notes: ................................................................. 66
LAARS Heating Systems
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Table of Contents
