LAARS Heating Systems
TABLE OF CONTENTS
SECTION 1
Product Accessories
1.1 Introduction ........................................................... 1
1.2 Included with the Appliance ................................... 1
SECTION 2
Product Characteristics
2.1 Model Nomenclature ............................................. 2
2.2 Specications ........................................................ 3
2.3 Dimensions ........................................................... 6
2.4 Names of Components ......................................... 8
2.5 Product Flow and Characteristics ....................... 11
SECTION 3
Safety Regulations
3.1 Safety Symbols ................................................... 12
3.2 Safety Precautions and Proper Use .................... 14
SECTION 4
Installation
4.1 Location and Clearances .....................................15
4.2 Wall Mount Bracket ..............................................16
4.2.1 Installation Height and Location .................16
4.2.2 Hang the Boiler ..........................................16
4.3 Combustion Air .....................................................17
4.3.1 Combustion Air from Room ........................17
4.3.2 Ducted Combustion Air ..............................17
4.4 Venting (exhaust) .................................................19
4.5 General Location Guidelines ................................20
4.6 Locations for Vent Pipe Terminator ......................21
4.6.1 Direct Venting Clearances ..........................21
4.6.2 Non-Direct Venting Clearances ..................22
4.6.3 Venting Requirements in Massachusetts ...23
4.7 Air Supply and Vent Connections at the Appliance .25
4.7.1 Vent / Air Pipe Lengths ...............................25
4.7.2 Direct Venting .............................................25
4.7.3 Indoor Combustion Air ................................26
4.8 Vent / Air Pipe Termination ...................................27
4.9 Gas Supply and Piping .........................................29
4.10 Gas Supply Pressure ..........................................34
4.11 Gas Set Up and Adjustment ................................35
4.12 High Altitude Installations and Orices ................36
4.13 Natural Gas to Propane Conversion ...................37
4.14 Plumbing Guidelines ...........................................39
4.15 Pressure Relief Valve ..........................................46
4.16 Disposal of Condensate ......................................47
4.17 Electrical Wiring Connections .............................48
4.18 DIP Switches .......................................................49
4.19 Control Board, Electrical Diagram ......................50
4.20 Ladder Diagram ..................................................51
4.21 Electrical Connections .........................................52
SECTION 5
Control Display and Operation
5.1 Control Dial and Buttons ......................................54
5.2 LCD Overview ......................................................55
5.3 Operating Mode ...................................................56
5.4 Setting the Clock ..................................................57
5.5 CH Set Point Change Mode .................................58
5.6 Status Display Mode ............................................59
5.7 Installer Mode .......................................................60
5.8 Storage (Indirect Water Heater) ...........................63
5.9 Outdoor Reset Adjustment ...................................64
5.10 External Set Point Temperature Control ...............64
5.11 Error Mode ...........................................................65
SECTION 6
Error Codes
6.1 Error Codes ..........................................................66
6.2 Fault Tree Analysis ...............................................70
SECTION 7
Trouble Shooting
7.1 Diagnostics ...........................................................71
7.2 Suggested Corrective Actions ..............................72
SECTION 8
Maintenance
8.1 Annual Startup and General Maintenance ...........74
8.2 Flushing the Boiler ...............................................76
SECTION 9
Installation Check
9.1 Quick View ...........................................................77
9.2 Final Check Lists ..................................................78
SECTION 10
Parts
10.1 Parts List and Illustrations ...............................80-91
