Manuals / Lochinvar / Household Appliance / Boiler

Lochinvar 51-211 Hydronic piping continued, Near boiler piping connections, Circulator sizing

Models: 51-211

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6 Hydronic piping (continued)

Installation & Operation Manual

6 Hydronic piping (continued)

Near boiler piping connections

Figure 6-1ANear Boiler Piping w/Y-Strainer

Figure 6-1BNear Boiler Piping w/Low Loss Header

VENT AIR

VENT

AIR

CONDENSATE DRAIN

		DOMESTIC HOT
		WATER PUMP
	M
O

CONDENSATE

DRAIN

BOILER

PUMP

TO FLOOR

DRAIN

Y-STRAINER (RECOMMENDED)

M

E

ST

MSY

O

R

F

FROM	INDIRECT
FROM	DOMESTIC
	HOT WATER
		TANK
TO			M
			M
			E
			T
			S
DOMESTIC			Y
DOMESTIC			S
HOT WATER			O
HOT WATER			T
PUMP
			SYSTEM
			PUMP
			SYSTEM
			SENSOR

AIR

SEPARATOR

EXPANSION TANK

TO FLOOR

DRAIN

BOILER

PUMP

Y-STRAINER (RECOMMENDED)

LOW LOSS HEADER (TYPICAL)

R	INDIRECT
F	INDIRECT
	DOMESTIC
	HOT WATER
O	TANK
T		EM
		EM
		ST		EM
	Y			EM
	S			ST
	O		Y
	T		S
		M
		O
SYSTEM		R
SYSTEM		F
SENSOR
AIR
SEPARATOR
AIR VENT
VALVE	SYSTEM PUMP
	SYSTEM SENSOR
	AIR SEPARATOR
	FILL VALVE
	EXPANSION TANK
DRAIN (TYPICAL)
DRAIN VALVE

Circulator sizing

The Knight wall mount boiler heat exchanger does have a pressure drop, which must be considered in your system design. Refer to the graph in FIG. 6-2 for pressure drop through the Knight wall mount boiler heat exchanger.

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Lochinvar 51-211 operation manual Hydronic piping continued, Near boiler piping connections, Circulator sizing

Contents

WBII-I-O Rev Installation & Operation Manual Models 51Save this manual for future reference DANGER Hazard definitionsCAUTION CAUTION NOTICE ContentsInstallation & Operation Manual When servicing boilerPlease read before proceeding Boiler operation7. Boiler outlet temperature sensor housed with high limit sensor 2. Combustion chamber access cover8. Boiler inlet temperature sensor 9. Temperature and pressure gauge field installed, not shownModels 51 The Knight Wall Mount Boiler - How it works... continuedFront View Bottom ViewRatings Other SpecificationsKnight Wall Mount Boiler AHRI Rating Figure A High Altitude Label LocationCloset and alcove installations Installation must comply withClearances for service access 1 Determine boiler locationFigure 1-2 Alcove Installation - Minimum Required Clearances Figure 1-1 Closet Installation - Minimum Required ClearancesInstallation & Operation Manual 1 Determine boiler locationResidential garage installation Installation & Operation ManualPrecautions 1 Determine boiler location continuedTable 1A Corrosive Contaminants and Sources When using an existing vent system to install a new boilerProducts to avoid Areas likely to have contaminantsInstallation & Operation Manual When removing a boiler from existing common vent system1 Determine boiler location continued 2 Prepare boiler Figure 2-2 Gas Valve Power Switch & Venturi RemovalRemove boiler from wood pallet Gas conversions2 Prepare boiler continued Figure 2-3 Installing Propane OrificeMounting the boiler Mounting to a wood studded wallDirect venting options - Sidewall Vent 3 General ventingDirect venting options - Vertical Vent for more details3 General venting continued Install vent and combustion air pipingAir intake/vent connections Figure 3-6 Near Boiler Air PipingSizing Requirements for installation in CanadaModel 2 Max Vent/AirAir inlet pipe materials MaterialsInstallation & Operation Manual 3 General venting continuedAir contamination Optional room airTable 3C Optional Room Air Kit ModelFor installations using 2 vent, the first seven 2to 3 increaser are required to be CPVC when PVC/CPVC vent is usedApproved PVC/CPVC Vent Pipe and Fittings PVC/CPVCCentrotherm InnoFlue SW PolypropyleneTable 3E Polypropylene Vent Pipe and Fittings Approved Polypropylene Vent ManufacturersZ Flex Heat FabProTech Stainless steel vent4 Sidewall direct venting If using the alternate sidewall terminationVent/air termination - sidewall Determine locationFigure 4-2A Clearance to Gravity Air Inlets 4 Sidewall direct venting continuedFigure 4-3A Clearance to Forced Air Inlets Vent/air termination - sidewallFigure 4-4A PVC/CPVC Sidewall Termination Assembly Figure 4-4B Polypropylene Sidewall Termination AssemblyPrepare wall penetrations Prepare wall penetrations Alternate - Field Supplied OptionInstallation & Operation Manual Multiple vent/air terminations4 Sidewall direct venting continued Figure 4-7 Kit Contents Sidewall termination installationSidewall termination - optional concentric vent Description and usageFigure 4-9 Rain Cap to Vent Pipe Alternate Assembly Figure 4-8 Concentric Vent Dimensional DrawingSidewall termination - optional concentric vent models Installation & Operation ManualMultiventing sidewall terminations Figure 4-10 Concentric Vent Sidewall AttachmentFigure 4-11 Concentric Vent and Combustion Air Termination Installation & Operation ManualVent/air termination - vertical 5 Vertical direct ventingFigure 5-1B Stainless Steel Vertical Termination of Air and Vent Installation & Operation ManualFigure 5-2 Vertical Terminations with Multiple Boilers Prepare roof penetrationsFigure 5-3 Alternate Vertical Terminations with Multiple Boilers 5 Vertical direct ventingFigure 5-5 Do Not Install U-Bend to Rain Cap Vertical termination installation5 Vertical direct venting continued Vertical termination - optional concentric ventMultiventing vertical terminations Figure 5-6 Concentric Vent Roof InstallationFigure 5-7 Concentric Vent and Combustion Air Vertical Termination Installation & Operation ManualVent / Air Alternate vertical concentric ventingMinimum Existing Inlet SizeFigure 5-10 Existing Vent as a Chase Existing vent as a chaseInstallation & Operation Manual 5 Vertical direct ventingSystem water piping methods 6 Hydronic pipingGeneral piping information Low water cutoff deviceTemperature and pressure gauge 12. System temperature sensorNear boiler piping components Boiler system pipingNear boiler piping connections 6 Hydronic piping continuedCirculator sizing Figure 6-1A Near Boiler Piping w/Y-Strainer25F Temperature Rise Applications 20F Temperature Rise Applications35F Temperature Rise Applications Figure 6-2 Pressure Drop vs. Flow - Models 51SMART SYSTEM / Multi-temperature loop control option Minimum Temperature RiseVariable speed pump setup PumpInstallation & Operation Manual Figure 6-3 Single Boiler - Single Temperature Zoned with Circulators6 Hydronic piping MAKE UP WATERModel Number of UnitsRequired Pipe Sizes Installation & Operation ManualInstallation & Operation Manual Figure 6-5 Single Boiler - Multiple TemperaturesWIRES 24V SIGNAL TORequired Pipe Sizes Figure 6-6 Multiple Boilers - Multiple TemperaturesInstallation & Operation Manual 6 Hydronic piping continued6 Hydronic piping ModelNumber of Units Required Pipe SizesInstallation & Operation Manual Figure 6-8 Single Boiler Zoned with Valves6 Hydronic piping continued BOILERFigure 6-9 Multiple Boilers Zoned with Valves ModelInstallation & Operation Manual 6 Hydronic pipingInstallation & Operation Manual Figure 6-10 Single Boiler - Non-Zoned Primary/Secondary Piping6 Hydronic piping continued BOILER7 Gas connections Connecting gas supply pipingFigure 7-1 Gas Supply Piping 7 Gas connections continued Figure 7-2 Inlet Pipe with Backup WrenchNatural gas Propane GasTable 7A Natural Gas Pipe Size Chart Natural Gas Pipe Capacity ChartCheck inlet gas supply Length of Pipe in Straight Feet for 1/2 PSIGas Pressure Gas valve replacementFigure 7-3 Inlet Gas Supply Check Installation & Operation ManualInstallation must comply with 8 Field wiringFigure 8-2 Line Voltage Field Wiring Connections Figure 8-3 Routing Field WiringOutdoor temperature sensor 8 Field wiring continuedLouver proving switch Flow switchWiring of the cascade Alarm contactsSystem supply sensor Boiler management system8 Field wiring continued Figure 8-4 Low Voltage Field Wiring ConnectionsInstallation & Operation Manual Condensate drain 9 Condensate disposalFigure 9-1 Condensate Disposal Installation & Operation Manual10 Start-up Freeze protection when usedCheck/control water chemistry Fill and test water systemCheck for gas leaks Clean/Inspect Trap AssemblyCheck thermostat circuits Inspect/fill condensate systemStart the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boilerInstallation & Operation Manual Figure 10-2 Operating Instructions10 Start-up Adjust set point temperatures Table 10A Flue Products ChartCheck flame and combustion continued Set space heating operationConfiguration of the cascade Set DHW boiler target temperatureSet domestic hot water DHW operation Verify DHW mode11 Operating information 0 - 10V input set point or powerGeneral How the boiler operatesProtection features Temperature controlRamp delay Outdoor air resetRun-time and alarm outputs Boiler temperature regulationService reminder Error loggingTarget temperature with outdoor reset Outdoor reset operation, if usedReset curve SWITCHING ON SEQUENCEOPERATION Sequence of operationDISPLAY Installation & Operation ManualInstaller Access modesSequence of operation continued UserFigure 11-1 Control Panel Knight wall mount boiler control module11 Operating information continued Boiler Status IndicatorsCall for Heat Status Display Screens11 Operating information continued Installation & Operation ManualInformation Operationalkey function Dial FunctionNAVIGATION RIGHT SELECTService technician 12 Maintenance Maintenance and annual startupOwner maintenance Table 12A Service and Maintenance SchedulesAddress reported problems 12 MaintenanceClean condensate trap Inspect boiler areaCheck ignition ground wiring 12 Maintenance continuedCheck all boiler wiring Check control settingsCleaning boiler heat exchanger Check flame signalFigure 12-2 Burner Assembly Review with ownerOiled bearing circulators Table 12B Heat Exchanger Cleaning KitsFigure 12-3 Rope Gasket - Heat Exchanger Door 12 Maintenance continuedFigure 13-1 Ladder Diagram 13 DiagramsPC INTERFACE 13 Diagrams Figure 13-2 Wiring DiagramInstallation & Operation Manual LOW VOLTAGEWBII-I-O Rev I 05/12 Revision I ECO #C10450 reflects changes made to Table 10A on page