LAARS Heating Systems
Section 1 - General InformatIon
1.1 Introduction ......................................................1
1.2
Safety Notes .....................................................1
1.3
Model Identification
.........................................2
1.4 Warranty ...........................................................2
1.5
Unit Overviews 2MBH, 3MBH, 4MBH ....3-5
1.6 Dimensions .......................................................6
1.7 Unpacking ........................................................7
Section 2 - locatInG the applIance
2.1
Locating the Appliance .....................................7
2.2
Correct Vent Distance
from Outside Wall or Roof Termination ...........7
Section 3 - VentInG and combuStIon aIr
3.1
Combustion Air ................................................8
3.1.1 Combustion Air From Room ............................8
3.1.2 Ducted
Combustion
Air ....................................9
3.2 Venting .............................................................9
3.2.1 Common
Venting ............................................10
3.2.3 Venting Requirements Unique to Canada ......10
3.3
Locating the Vent and Combustion Air
Terminals ........................................................ 11
3.3.1 Side Wall Vent Terminal ................................. 11
3.3.2 Side Wall Combustion Air Terminal ..............13
3.3.3 Vertical Vent Terminal ....................................14
3.3.4 Vertical
Combustion
Air
Terminal..................14
3.3.5 Installations in the Commonwealth of
Massachusetts .................................................14
3.4
Common Vent Test .........................................15
3.5
Outdoor Installation ........................................16
Section 4 - GaS Supply and pIpInG
4.0
Gas Supply and Piping ...................................16
Section 5 - pump requIrementS
5.1
MagnaTherm Boiler Flow and Head
Requirements ..................................................18
5.2
MagnaTherm Water Heater Flow and Head
Requirements ..................................................18
table of contents
i
Section 6 – Water connectIonS, mGh
6.1
MGH System Piping: Hot Supply
Connections ....................................................19
6.2
MGH Cold Water Make-Up ...........................19
6.3
MGH Freeze Protection..................................19
6.4
MGH Suggested Piping Schematics .........20-24
6.5
Condensate Drain Trap
...............................20
Section 7 - Water connectIonS, mGV
7.1
MGV Water Quality .......................................25
7.2
MGV Suggested Piping Schematics ...............26
7.3
MGV Piping Requirements ............................25
7.4
MGV Cold Water Make-Up ...........................26
7.5
MGV Freeze Protection ..................................26
7.6
MGV Water Flow ...........................................27
7.7
Condensate Drain Trap ...................................27
Section 8 – electrIcal connectIonS
8.1
Installation Warnings .....................................28
8.2
Main Power Connections ...............................28
8.3
Pump Connections and Operation ..................29
8.4
Control Panel Layout......................................30
8.5
Wiring Diagram .........................................32-33
8.6
High Voltage Wiring Diagrams .................34-36
8.7
Ladder Diagrams ......................................37-39
