Lochinvar WH 55-399 operation manual Number of Units

Page 41

Installation & Operation Manual

6 Hydronic piping (continued)

Figure 6-6Multiple Boilers - Single Temperature Zoned with Zone Valves - DHW Priority

 

 

 

Number of Units

 

Model

2

3

4

5

6

7

8

 

 

Required Pipe Sizes

 

55

1-1/4"

1-1/2"

1-1/2"

2"

2"

2"

2"

85

1-1/4"

1-1/2"

2"

2"

2"

2-1/2"

2-1/2"

110

1-1/2"

2"

2"

2-1/2"

2-1/2"

2-1/2"

3"

155

2"

2"

2-1/2"

2-1/2"

3"

3"

4"

199

2"

2"

2-1/2"

3"

4"

4"

4"

285

2-1/2"

2-1/2"

3"

4"

4"

4"

5"

399

2-1/2"

3"

4"

4"

5"

5"

5"

 

 

ZONE #1

 

PRESSURE

 

BACKFLOW

REDUCING

ZONE #2 ZONE #3 ZONE #4

PREVENTER

VALVE

PRESSURE

BALL VALVE

 

GAUGE

 

ZONE VALVES

(TYPICAL)

 

(TYPICAL)

 

MAKE UP WATER

 

 

SYSTEM SUPPLY

DIFFERENTIAL PRESSURE

 

BYPASS VALVE

 

SENSOR

(RECOMMENDED)

AIR SEPARATOR

 

 

 

SYSTEM

EXPANSION

CIRCULATOR

 

TANK

 

DRAIN POINT

(TYPICAL)

BOILER

CIRCULATOR

PRESSURE

RELIEF VALVE

MAY SUBSTITUTE LOW LOSS HEADER

NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART

Y-STRAINER

ANTI-SCALD

 

MIXING VALVE

 

(RECOMMENDED)

 

HOT

(TYPICAL)

DOMESTIC

 

WATER

 

HOT WATER

OUT

 

CIRCULATOR

 

COLD

WATER

IN

BOILER 2

(MEMBER 1)

BOILER 1 (LEADER)

INDIRECT

DHW TANK

TEMPERATURE /

 

 

 

DRAIN

 

 

 

 

 

 

UNION

PRESSURE

 

 

 

GAUGE

 

 

 

(TYPICAL)

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.

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Contents Models WH 55 Contents Please read before proceeding When servicing boilerBoiler operation Boiler waterStainless steel heat exchanger Knight Wall Mount Boiler How it worksModels 55 Knight Wall Mount Boiler Ahri Rating RatingsCloset and alcove installations Installation must comply withDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Vent and air piping PrecautionsWall mounting location Prevent combustion air contaminationAreas likely to have contaminants When using an existing vent system to install a new boilerProducts to avoid When removing a boiler from existing common vent system Gas conversions Prepare boilerRemove boiler from wood pallet Mounting to a wood studded wall Mounting the boilerMounting to a concrete wall Mounting to a metal studded wallDirect venting options Sidewall Vent General ventingAir intake/vent connections Install vent and combustion air pipingSizing Requirements for installation in CanadaModel Kit Number Equivalent Vent Length Model Max Vent AirAir inlet pipe materials MaterialsAir contamination Optional room airMaterial Standard Approved PVC/CPVC Vent Pipe and FittingsVent pipe Vent fittingsCentrotherm InnoFlue SW Duravent Polypro ModelPolypropylene Stainless steel vent Sidewall direct venting If using the alternate sidewall terminationVent/air termination sidewall Determine location2AClearance to Gravity Air Inlets Prepare wall penetrations Model Air Vent Centerline WidthMultiple vent/air terminations Prepare wall penetrations Alternate Field Supplied OptionDescription and usage Sidewall termination installationSidewall termination optional concentric vent Sidewall termination optional concentric vent models 92 and 3 Concentric Vent Dimensional Drawing reference D onMultiventing sidewall terminations 12Concentric Vent Sidewall AttachmentPrepare roof penetrations Vertical direct ventingVent/air termination vertical Vertical termination optional concentric vent Vertical termination installationMinimum Combustion AIR Typical Multiventing vertical terminationsVent / Air Inlet Size Minimum Existing Vent / Chase Size Alternate vertical concentric ventingConcentric Venting Arrangement Existing vent as a chaseSystem water piping methods General piping information Hydronic pipingLow water cutoff device Chilled water systemNear boiler piping components Circulator sizing Near boiler piping connections25F Temperature Rise Applications 20F Temperature Rise Applications35F Temperature Rise Applications Pump Size GrundfosVariable speed pump option Smart System / Multi-temperature loop control optionVariable speed pump setup 3Single Boiler Primary / Secondary Piping Make UP Water Indirect Number of Units Boiler Member 8Single Boiler Multiple Temperature DHW Priority Model Required Pipe Sizes Boiler Make UP Boiler Gas connections Connecting gas supply pipingPropane Gas Natural gasLength of Pipe in Straight Feet for 1/2 PSI Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas Pressure Gas valve replacementLine voltage connections Field wiringInstallation must comply with Low voltage connections Louver proving switch Outdoor temperature sensorFlow switch ThermostatWiring of the cascade Alarm contactsSystem supply sensor Boiler management systemFieldwiring InstallationCondensate drain Condensate disposalStart-up Freeze protection when usedCheck/control water chemistry Fill and test water systemCheck for gas leaks Inspect/fill condensate system Clean/Inspect Trap AssemblyCheck thermostat circuits Inspect/check condensate lines and fittingsStart the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boiler2Operating Instructions Models 55 Operating Instructions Model Natural Gas Propane Set space heating operationSet domestic hot water DHW operation Verify DHW modeConfiguration of the cascade General Operating informationProtection features Boiler temperature regulation Cascade Outdoor reset operation, if usedOperation Display Sequence of operationUser Access modesInstaller 1Control Panel Knight wall mount boiler control moduleCall for Heat Information Dial Function Service technician Maintenance Maintenance and annual startupOwner maintenance See the following pages for instructions GeneralMaintenance Check all boiler wiring Check ignition ground wiringCheck control settings Flue vent system and air pipingCleaning boiler heat exchanger Check flame signalPerform start-up and checks Check burner flamePC Interface Diagrams2Wiring Diagram
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