Lochinvar WH 55-399 operation manual Check inlet gas supply, Natural Gas Pipe Capacity Chart

Page 50

Installation & Operation Manual

7 Gas connections

Table 7A Natural Gas Pipe Size Chart

Nominal

 

 

 

 

Natural Gas Pipe Capacity Chart

 

 

 

 

Iron Pipe

 

 

 

Length of Pipe in Straight Feet for 1/2 PSI

 

 

 

Size (Inches)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

20

30

40

50

60

70

80

90

100

125

150

175

200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2

175

120

97

82

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3/4

369

256

205

174

155

141

128

121

113

106

95

86

79

74

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

697

477

384

328

292

267

246

236

210

200

179

164

149

138

1-1/4

1400

974

789

677

595

543

502

472

441

410

369

333

308

287

1-1/2

2150

1500

1210

1020

923

830

769

707

666

636

564

513

472

441

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

4100

2820

2260

1950

1720

1560

1440

1330

1250

1180

1100

974

871

820

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2-1/2

6460

4460

3610

3100

2720

2460

2310

2100

2000

1900

1700

1540

1400

1300

3

11200

7900

6400

5400

4870

4410

4000

3800

3540

3330

3000

2720

2500

2340

4

23500

16100

13100

11100

10000

9000

8300

7690

7380

6870

6150

5640

5130

4720

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

￿WARNING

Knight wall mount boilers are typically shipped ready to fire on natural gas. Check boiler rating plate to determine which fuel the boiler is set for. If set to natural gas, it may be converted to LP by installing an orifice (see page 13). In order to operate on LP gas, an orifice MUST BE installed. Failure to comply could result in severe personal injury, death, or substantial property damage.

Check inlet gas supply

NOTICE

CSA or UL listed flexible gas connections

are acceptable, but you must exercise

 

caution to ensure that the line has

 

adequate capacity to allow your boiler

 

to fire at full rate. Consult with local

 

codes for proper installation or service

 

procedures.

3.

Loosen the set screw one (1) full turn from inside the

 

pressure tap on top of the gas valve. Place the tubing of

 

the manometer over the tap once the set screw is

 

loosened as shown in FIG. 7-3.

4.

Slowly turn on the gas supply at the field installed

 

manual gas valve.

5.

Turn on power at source..

￿WARNING

DO NOT adjust gas valve outlet pressure. The gas valve is factory-set for the correct outlet pressure. This setting is suitable for natural gas and propane, requiring no field adjustment. Attempting to alter the gas valve outlet pressure could result in damage to the valve, causing potential severe personal injury, death, or substantial property damage.

6.

Adjust the temperature set point on the control panel of

 

the SMART SYSTEM control module to call for heat.

7.

Observe the gas supply pressure as the burner fires at

 

100% of rated input. Percent of burner input will be

 

displayed on the control panel.

8.

Ensure inlet pressure is within specified range.

 

Minimum and maximum gas supply pressures are

 

specified in this section of the manual.

9.

If gas supply pressure is within normal range and no

The gas piping must be sized for the proper flow and length of pipe, to avoid excessive pressure drop. Both the gas meter and the gas regulator must be properly sized for the total gas load.

If you experience a pressure drop greater than 1 inch w.c., the meter, regulator, or gas line is undersized or in need of service. Perform the steps below when checking inlet gas supply:

1.Shut off power at source.

2.Shut off gas supply at the manual gas valve in the gas piping to the appliance.

 

adjustments are needed, proceed on to Step 11.

10.

If the gas pressure is out of range, contact the gas utility,

 

gas supplier, qualified installer or service agency to

 

determine the necessary steps to provide proper gas

 

pressure to the control.

11.

Shut off power at source.

12.

Shut off the gas supply at the manual gas valve in the gas

 

piping to the appliance.

13.

Remove the manometer from the pressure tap on top of

 

the gas valve. Re-tighten the set screw inside the pressure

 

tap.

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Contents Models WH 55 Contents Boiler operation When servicing boilerPlease read before proceeding Boiler waterKnight Wall Mount Boiler How it works Stainless steel heat exchangerModels 55 Ratings Knight Wall Mount Boiler Ahri RatingDetermine boiler location Installation must comply withCloset and alcove installations Before locating the boiler, check1Closet Installation Minimum Required Clearances Wall mounting location PrecautionsVent and air piping 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 concrete wall Mounting the boilerMounting to a wood studded wall Mounting to a metal studded wallGeneral venting Direct venting options Sidewall VentInstall vent and combustion air piping Air intake/vent connectionsModel Kit Number Equivalent Vent Length Requirements for installation in CanadaSizing Model Max Vent AirMaterials Air inlet pipe materialsOptional room air Air contaminationVent pipe Approved PVC/CPVC Vent Pipe and FittingsMaterial Standard Vent fittingsCentrotherm InnoFlue SW Duravent Polypro ModelPolypropylene Stainless steel vent Vent/air termination sidewall If using the alternate sidewall terminationSidewall direct venting Determine location2AClearance to Gravity Air Inlets Model Air Vent Centerline Width Prepare wall penetrationsPrepare wall penetrations Alternate Field Supplied Option Multiple vent/air terminationsDescription and usage Sidewall termination installationSidewall termination optional concentric vent 92 and 3 Concentric Vent Dimensional Drawing reference D on Sidewall termination optional concentric vent models12Concentric Vent Sidewall Attachment Multiventing sidewall terminationsPrepare roof penetrations Vertical direct ventingVent/air termination vertical Vertical termination installation Vertical termination optional concentric ventMultiventing vertical terminations Minimum Combustion AIR TypicalConcentric Venting Arrangement Alternate vertical concentric ventingVent / Air Inlet Size Minimum Existing Vent / Chase Size Existing vent as a chaseLow water cutoff device Hydronic pipingSystem water piping methods General piping information Chilled water systemNear boiler piping components Near boiler piping connections Circulator sizing35F Temperature Rise Applications 20F Temperature Rise Applications25F 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 Connecting gas supply piping Gas connectionsNatural gas Propane GasLength of Pipe in Straight Feet for 1/2 PSI Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas valve replacement Gas PressureLine voltage connections Field wiringInstallation must comply with Low voltage connections Flow switch Outdoor temperature sensorLouver proving switch ThermostatSystem supply sensor Alarm contactsWiring of the cascade Boiler management systemInstallation FieldwiringCondensate disposal Condensate drainCheck/control water chemistry Freeze protection when usedStart-up Fill and test water systemCheck thermostat circuits Clean/Inspect Trap AssemblyCheck for gas leaks Inspect/fill condensate system Inspect/check condensate lines and fittingsIf boiler does not start correctly Final checks before starting the boilerStart the boiler Check system and boiler2Operating Instructions Models 55 Operating Instructions Model Set space heating operation Natural Gas PropaneSet domestic hot water DHW operation Verify DHW modeConfiguration of the cascade Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if used CascadeSequence of operation Operation DisplayUser Access modesInstaller Knight wall mount boiler control module 1Control PanelCall for Heat Information Dial Function Owner maintenance Maintenance Maintenance and annual startupService technician See the following pages for instructions GeneralMaintenance Check control settings Check ignition ground wiringCheck all boiler wiring Flue vent system and air pipingPerform start-up and checks Check flame signalCleaning boiler heat exchanger Check burner flameDiagrams PC Interface2Wiring Diagram

WH 55-399 specifications

The Lochinvar WH 55-399 is a high-efficiency water heater designed for residential and commercial applications, offering a reliable solution for hot water needs. This model represents an advanced approach to water heating, combining cutting-edge technologies and features that ensure optimal performance and energy efficiency.

One of the standout features of the Lochinvar WH 55-399 is its high thermal efficiency, which is a key factor in reducing energy consumption and operating costs. With an efficiency rating exceeding 90%, this water heater ensures that more energy is converted into usable hot water, making it an environmentally friendly choice.

The WH 55-399 utilizes advanced condensing technology, which allows it to extract additional heat from the exhaust gases before they are expelled. This process not only increases efficiency but also significantly decreases greenhouse gas emissions. The unit is also equipped with an intelligent control system that allows for precise temperature adjustments, ensuring that the user has an optimal supply of hot water while maintaining energy savings.

Another important aspect of this model is its impressive recovery rate. The ability to quickly heat water after a significant draw ensures that users will not experience interruptions in their hot water supply, making it ideal for busy households or commercial environments. This is particularly beneficial in applications requiring consistent hot water availability, such as restaurants or athletic facilities.

The Lochinvar WH 55-399 is designed with durability in mind. Constructed from high-quality materials, this water heater boasts a robust tank lined with corrosion-resistant coatings, extending the lifespan of the unit and reducing maintenance needs. Additionally, it features a reliable gas burner and a well-insulated tank, contributing to its overall efficiency and performance.

Safety is also a priority with the WH 55-399. The unit incorporates multiple safety features, including a flame sensor, automatic shut-off valve, and over-temperature protection, ensuring peace of mind for users.

In summary, the Lochinvar WH 55-399 stands out with its combination of high efficiency, advanced technology, and durable construction. Whether for residential or commercial use, this water heater provides a dependable and cost-effective solution for all hot water needs. Its innovative design and performance characteristics make it a top choice for anyone seeking a premium water heating option.
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