TABLE OF CONTENTS
SECTION 1 GENERAL INFORMATION
1.A
Safety Warnings .....................................4
1.B
Introduction .............................................
6
1.C
Warranty .................................................
6
1.D
Model Number and Nomenclature .........
6
1.E
Model Overview ......................................7
1.F
Dimensions .............................................
9
1.G
The Installation Kit ................................10
1.H
Accessory Kits Available.......................10
SECTION 2 LOCATING THE BOILER
2.A
Field Assembly .....................................10
2.B
Boiler Placement ..................................10
2.C
Clearances ...........................................10
SECTION 3 AIR AND VENTING
3.A
Safety Warnings ................................... 11
3.B
Combustion Air Supply .........................12
3.C
Venting .................................................13
3.D
Vertical Venting - Category I ................14
3.E
Locations for Vent Pipe Terminator.......15
3.F
Venting with a Power Venter ...............16
3.G
Common Vent Test ...............................16
SECTION 4 GAS CONNECTIONS
4.A
Gas Supply and Piping .........................17
4.B
LP Gas Conversion ..............................18
4.C
Special Precautions for LP Gas............18
SECTION 5 PUMP REQUIREMENTS
5.A
Pump Sizing .........................................19
SECTION 6 WATER CONNECTIONS
6.A
Water Piping .........................................20
6.B
Low Loss Header .................................20
6.C
Chilled Water Systems .........................20
6.D
Oxygen Permeable Systems ................20
6.E
Anti-freeze ............................................20
6.F
Typical Plumbing Diagrams ..................21
SECTION 7 ELECTRICAL AND
WIRING DIAGRAMS
7.A
Safety Warnings ...................................23
7.B
Main Power, 120V ................................23
7.C
Outdoor Sensor ....................................23
7.D
Field Connections ..............................
24
7.D.1 TB1 (Term Block 1 -TT, DHW, OAS) .
24
7.D.1.a TT (Central Heat)..................................24
7.D.1.b DHW. ...................................................24
7.D.1.c Field Interlocks .....................................24
7.D.1.d PV Terminals .......................................24
7.D.1.e WWSD + COM ....................................24
7.D.1.f OAS + COM .........................................24
7.D.2 TB2 (for pumps and aux power) .......
25
7.D.2.a Boiler Pump ..........................................25
7.D.2.b SYS Pump ............................................25
7.D.2.c Aux Power ............................................25
7.D.3 TB3 (for optional equipment) ............
25
7.D.3.a DHW Pump ..........................................25
7.D.3.b DHW Aquastat ......................................25
7.E
Wiring Connects, Power Vent and Air ..26
7.F
Wiring Diagram .....................................28
7.G
Logic Diagram ......................................29
SECTION 8 THE DIGITAL DASHBOARD
8.A
Getting to know the Digital Dashboard.
8.A.1 Setting the Economy Feature ...............30
8.A.2 High Limit (High Temp) .........................30
8.A.3 Low Limit (Advanced Options/Adjust) ..30
8.A.4 Control LEDs ........................................31
8.A.4.a ACTIVE (TEMP) .................................31
8.A.4.b HI TEMP ..............................................31
8.A.4.c ACTIVE (LWCO) ..................................31
8.A.4.d LOW WATER .......................................31
8.A.4.e ACTIVE (ECONOMY) .........................31
8.A.4.f TARGET .............................................31
8.A.5 Digital LEDs ..........................................31
8.A.6 Ignition LEDs ........................................31
8.A.6.a LIMITS .................................................31
8.A.6.b V-PWR ..................................................31
8.A.6.c V-SW ...................................................31
8.A.6.d FLAME .................................................32
8.B
Default Settings. ................................32
8.C
Advanced Settings .............................32
8.C.1 Programming the Outdoor Sensors ......32
8.C.1.a Setting the Outdoor Reset ....................32
8.C.1.b Setting Warm Weather Shutdown ........32
8.C.1.d Thermal Boost ......................................33
8.C.2 Degrees Fahrenheit or Celsius .............34
LAARS Heating Systems