Install Instructions

LAARS Heating Systems
Section 1 -
General Information
1.1 Introduction ....................................................... 1
1.2 ModelIdentication(Nomenclature) ................. 1
1.3 ApplianceOverview .......................................... 2
1.4 Warranty ........................................................... 3
1.5 Unpacking ......................................................... 3
1.6 Dimensions ....................................................... 4
Section 2 -
Locating the Appliance
2.1 GeneralInformation .......................................... 5
2.2 LocatingApplianceforCorrectVentDistance
 fromOutsideWallorRoofTermination ............. 5
Section 3 -
Venting and Combustion Air
3.1 GeneralVenting ................................................ 6
3.2 CombustionAir ................................................. 6
3.3 Venting .............................................................. 8
3.4 LocatingVent&CombustionAirTerminals .....10
3.5 CommonVentTest .........................................13
Section 4 -
Gas Supply and Piping
4.1 GasSupplyandPiping ................................... 13
Section 5 -
Pump Requirements
5.1 BoilerFlowand
 HeadRequirements ........................................ 14
Section 6
Water Connections
6.1 SystemPiping:HotSupply
 Connections .................................................... 15
6.2 ColdWaterMake-Up ...................................... 15
6.3 CondensateDrain ........................................... 16
6.4 FreezeProtection ........................................... 16
6.5 SuggestedPipingSchematics ...................16-23
6.6 RecognizedChemicals ................................... 16
Section 7 -
Electrical and Wiring Diagrams
7.1 InstallationWarnings ...................................... 24
7.2 MainPowerConnections ................................ 24
7.3 PumpConnectionsandOperation ................. 24
7.4 HydronicHeatingUsingExternalMod ............ 25
7.5 OptionalFieldConnections ............................. 25
7.6 LeadLagConnections .................................... 26
7.7 SystemWiringDiagram .................................. 28
7.8 LadderDiagram .............................................. 30
Section 8-
The User Interface
8.1 AbouttheUserInterface ................................. 31
8.2 NavigatingtheUserInterface ......................... 31
8.3 TheHomeDisplay .......................................... 32
8.4 CustomizingyourHomeDisplay .................... 32
8.5 Entering/ChangingControlSettings ............. 32
8.6 QuickStartMenu ............................................ 35
Conguration and Setup
8.7 24VACTransformerwithIntegral
 CircuitBreaker ................................................ 36
8.8 HydronicHeatingDemand ............................. 36
8.9 Anti-Short-Cycle ............................................. 36
8.10 OutdoorAirTemperatureSensor ....................36
8.11 OutdoorReset ................................................ 37
8.12 WarmWeatherShutdown ............................... 38
8.13 DomesticHotWater........................................ 39
8.14 AboutLeadLagOperation ............................. 41
8.15 AdjustingCO
2
................................................ 45
Table of Contents
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