Lochinvar 400-801 operation manual Temperature Wires to Loop Sensors 120VAC to

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Outdoor Knight XL Installation & Operation Manual

3 Hydronic piping (continued)

Figure 3-11Single Boiler - Multiple Temperatures with DHW Piped as a Zone

	TEMPERATURE			WIRES TO
	TEMPERATURE			LOOP SENSORS
	TEMPERATURE	LOOP 3		LOOP SENSORS
	TEMPERATURE	LOOP 3
	LOOP 2
TEMPERATURE
LOOP 1
LOOP SENSOR (3X)				120VAC TO
				120VAC TO
MAKE UP WATER				PUMPS
MAKE UP WATER
AIR SEPARATOR
BACK FLOW
PREVENTER				TO
				TO
PRESSURE	BALL VALVE			SYSTEM	FROM
PRESSURE
GAUGE
	(TYPICAL)
					SYSTEM


					MULTI-TEMP
					LOOP CONTROL
					(OPTIONAL)
				Y-STRAINER	24VAC SIGNAL
				(RECOMMENDED)	TO MIXING VALVES
					TO MIXING VALVES
				FLOW CHECK
				VALVE (TYPICAL)
PRESSURE				BOILER CIRCULATOR
PRESSURE
REDUCING
VALVE
DRAIN POINT					SHIELDED CABLE
(TYPICAL)					SHIELDED CABLE
(TYPICAL)					TO BOILER CONTROL
EXPANSION					TO BOILER CONTROL
EXPANSION
TANK
INDIRECT DHW
TANK
HOT WATER OUT
ANTI-SCALD					BOILER
MIXING VALVE	DOMESTIC		UNION (TYPICAL)
COLD WATER IN	HOT WATER		UNION (TYPICAL)
	HOT WATER
	CIRCULATOR		DRAIN
	CIRCULATOR		DRAIN
	PRESSURE RELIEF		TEMPERATURE / PRESSURE		IMG00412
	VALVE		GAUGE		IMG00412

CAUTION

CAUTION

NOTICE

NOTICE

NOTICE

Indirect water heaters are capable of transferring a limited number of Btu’s into the water. Ensure boiler output does not not exceed indirect water heater transfer capabilities.

Mixing valves are required for the protection of low temperature loops.

Please note that these illustrations are meant to show system piping concept only, the installer is responsible for all equipment and detailing required by local codes.

Please note that the installer is responsible for ensuring DHW prioritization when piped as a zone.

Please note that these illustrations show an indoor tank to demonstrate piping concept only.

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Contents

Outdoor Knight XL Models 400 Contents Please read before proceeding When servicing boilerStainless steel heat exchanger Outdoor Knight XL How it worksModel Models 601 Outdoor Knight XL Boiler Ahri Rating RatingsBefore locating the boiler, check Installation must comply withDetermine boiler location Prevent combustion air contamination Provide clearancesOutdoor vent / air intake location Flooring and foundationRemove boiler from wood pallet Install ﬂue pipe assembly Models 400Prepare boiler Models 701 3Install ﬂue pipe assembly Models 701Gas conversions Model 4Installing Propane Oriﬁce ModelLeveling the boiler Models 601Hydronic piping TEE with 1 Fitting on TOP Nipple Close Nipple Near boiler piping components Flow switch adjustmentVariable speed pump option Near boiler piping connectionsCirculator sizing 20F 25F 30F 35F Model Head FeetPressure 7Single Boiler Multiple Temperatures 8Single Boiler Primary/Secondary Piping Manifold Pipe Sizes in Inches mm Number of Units10Multiple Boilers Primary/Secondary Piping Temperature Wires to Loop Sensors 120VAC to Gas connections Connecting gas supply pipingPropane Gas Natural gasInches Check inlet gas supplyGas pressure Gas valve replacementLow voltage connections Field wiringInstallation must comply with Line voltage connectionsThermostat Outdoor temperature sensorHigh gas pressure switch Low gas pressure switchModBus Flow switchAlarm contacts Wiring of the cascade3Low Voltage Field Wiring Connections Condensate drain Condensate disposalFill and test water system Freeze protection when usedStart-up Check/control water chemistryInspect/check condensate lines and ﬁttings Check for gas leaksCheck thermostat circuits Inspect/ﬁll condensate systemCheck system and boiler Final checks before starting the boilerStart the boiler If boiler does not start correctlyFor Your Safety Read Before Operating Natural Gas Propane Set space heating operationConﬁguration of the cascade Verify DHW modeSet domestic hot water DHW operation How the control module operates Operating informationGeneral How the boiler operatesProtection features Temperature controlBoiler temperature regulation Cascade Outdoor reset operation, if usedOperation Display Sequence of operationStandby, ready to start a new cycle User Access modesInstaller Outdoor Knight XL control moduleCall for Heat Information Dial Function Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check boiler relief valve Flue vent system and air pipingCheck water system Check expansion tankInspect ignition and ﬂame sense electrodes Check ignition ground wiringCheck all boiler wiring Check control settingsModel Kit Part Component Number Description Check ﬂame signalCleaning boiler heat exchanger Review with ownerHigh Voltage Diagrams2Ladder Diagram