Lochinvar 800 operation manual Number of Units Model Manifold Pipe Sizes in Inches mm

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Installation & Operation Manual

6Hydronic piping

Figure 6-8Multiple Boilers - Primary/Secondary Piping

			Number of Units
Model	2	3	4	5	6	7	8
	Manifold Pipe Sizes in Inches (mm)
399	2 1/2 (64)	3 (76)	3 1/2 (89)	4 (102)	4 (102)	5 (127)	6 (152)
500	3 (76)	3 1/2 (89)	4 (102)	5 (127)	5 (127)	6 (152)	6 (152)
600	3 1/2 (89)	4 (102)	5 (127)	5 (127)	6 (152)	6 (152)	8 (203)
700	3 1/2 (89)	5 (127)	5 (127)	6 (152)	6 (152)	8 (203)	8 (203)
800	4 (102)	5 (127)	5 (127)	6 (152)	8 (203)	8 (203)	8 (203)

MAY SUBSTITUTE

LOW LOSS HEADER

AIR SEPARATOR

DRAIN POINT (TYPICAL)

SYSTEM SUPPLY SENSOR (WHEN USED)

SYSTEM CIRCULATOR

BALL VALVE (TYPICAL)

M E T S Y S M O R F

4 D E E C X E O T T O N

	T
	R
	A
	P
	A
	"
2
1
F
O
.
X
A
M
R
O
IA
D
E
IP
P

MAKE UP WATER

M

E

T

S

EXPANSION

Y

S

O

TANK

T

BACK FLOW

PREVENTER

PRESSURE REDUCING

VALVE

PRESSURE GAUGE

INDIRECT DHW

TANK

ANTI-SCALD

MIXING VALVE

HOT WATER OUT

DOMESTIC

HOT WATER

CIRCULATOR

UNION (TYPICAL)

COLD WATER IN

FLOW CHECK

Y-STRAINER

VALVE (TYPICAL)

(TYPICAL)

(RECOMMENDED)

BOILER CIRCULATOR (TYPICAL)

BOILER 4 (MEMBER 3)

BOILER 3 (MEMBER 2)

BOILER 2 (MEMBER 1)

BOILER 1 (LEADER)

PRESSURE RELIEF

VALVE

DRAIN

TEMPERATURE /

PRESSURE GAUGE

NOTICE

NOTICE

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.

System flow should always remain higher than the required flow for the boiler(s) when the boiler(s) is in operation to prevent short cycling and high limit issues.

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Image 40

Contents

Models 399 Save this manual for future referenceContents When servicing boiler Please read before proceedingKnight XL How it works Air pressure switch Pump relay board ModelModels 600 Ratings Knight XL Boiler =B=R RatingInstallation must comply with Closet and alcove installationsDetermine boiler location Before locating the boiler, checkFor closet installations, Cpvc or TOPResidential garage installation Provide air openings to roomVent and air piping Flooring and foundationProducts to avoid When using an existing vent system to install a new boilerAreas likely to have contaminants When removing a boiler from existing common vent system Prepare boiler Remove boiler from wood palletModel Gas conversionsLeveling the boiler Models 600General venting Direct venting options Vertical Vent Install vent and combustion air piping Requirements for installation in CanadaInstalling vent or air piping General ventingApproved Stainless Steel Vent Manufacturers PVC/CPVC air intake/vent connectionsMake Air inlet pipe materials Stainless steel ventFasNSeal Saf-T Vent Stainless steel air intake/vent connectionsOptional room air Removing from existing ventModel Description Kit Number Air contaminationIf using the alternate sidewall termination Sidewall direct ventingVent/air termination sidewall Determine location3AClearance to Gravity Air Inlets Prepare wall penetrations Bird Screen TypicalMultiple vent/air terminations Prepare wall penetrations Alternate Field Supplied OptionTermination and fittings Sidewall termination installation Description and usage9Concentric Vent Dimensional Drawing Models 399 11Concentric Vent Sidewall Attachment Multiventing sidewall terminationsVertical direct venting Vent/air termination verticalPrepare roof penetrations 2Vertical Terminations with Multiple BoilersVertical termination installation 4Concentric Vertical TerminationMultiventing vertical terminations Mm see -9,Hydronic piping Hydronic piping Near boiler piping connections Flow switch adjustment Circulator sizing Head Feet Pressure20F 25F 30F 35F 399 500 600 700 800Near boiler piping components 7Single Boiler Primary/Secondary Piping Number of Units Model Manifold Pipe Sizes in Inches mm Connecting gas supply piping Gas connectionsNatural gas Propane GasNominal Natural Gas Pipe Capacity Chart Check inlet gas supplyIron Pipe Length of Pipe in Straight FeetGas valve replacement Gas PressureInstallation must comply with Field wiringLine voltage connections Outdoor temperature sensor Auxiliary device proving switchHigh gas pressure switch Low gas pressure switchAlarm contacts Wiring of the cascadeSystem supply sensor Boiler management system3Low Voltage Field Wiring Connections Condensate disposal Condensate drainFreeze protection when used Start-upCheck/control water chemistry Fill and test water systemCheck for gas leaks Check thermostat circuitsInspect/fill condensate system Inspect/check condensate lines and fittingsFinal checks before starting the boiler Start the boilerIf boiler does not start correctly Check system and boilerFor Your Safety Read Before Operating Set space heating operation Natural Gas PropaneConfiguration of the cascade Set domestic hot water DHW operationOperating information GeneralProtection features Outdoor reset operation, if used Boiler temperature regulationCascade DHW, Night Setback, and Ramp Delay operation with Cascade Sequence of the cascadeSequence of operation BLR IgnitionKnight XL control module ShutdownAccess modes InstallerUser To save parameters and exit programmingService StandbySet Point Met PrepurgeSYS ***.*F Control will display the actual fan motor RPMDelay 10V in **.VdcOperation of the cascade Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Address reported problemsClean condensate trap Check all piping for leaks Inspect boiler areaFlue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Inspect ignition and flame sense electrodesCleaning boiler heat exchanger Check flame signalReview with owner Diagrams High Voltage2Ladder Diagram Page