Weil-McLain 88 manual Pipe tankless heaters, To pipe tankless heaters, Hot water can scald

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Boiler manual: • Installation • Start-Up • Maintenance • Parts

Pipe tankless heaters

Hot water can scald!

Consumer Product Safety Commission and some states recommend domestic hot water tempera- ture of 130°F or less.

When installing an automatic mixing valve, se- lection and installation must comply with valve manufacturer's recommendations and instruc- tions.

Water heated to a temperature suitable for clothes washing, dish washing and other sanitizing needs will scald and cause injury.

Children, elderly, infirm or physically handi- capped persons are more likely to be injured by hot water. Never leave them unattended in or near a bathtub, shower or sink. Never allow small children to use a hot water faucet or draw their own bath. If anyone using hot water in the building fits this description, or if state laws or local codes require certain water temperatures at hot water faucets, take special precautions:

—Install automatic mixing valve set according to those standards.

—Use lowest practical temperature setting.

—Check water temperature immediately after first heating cycle and after any adjustment.

Part No. 550-100-068/0308

To pipe tankless heaters:

1.See Figure 35.

2.Size piping no smaller than heater inlet and out- let.

3.Automatic mixing valve must be installed. See Figure 35. Follow manufacturer's instructions to install.

4.Flow regulating valve must be installed. Size accord- ing to continuous draw of heater. See Figure 34. Follow manufacturer's instructions to install.

5.Operating control with small adjustable differen- tial scale is recommended. Install in temperature control tapping in heater plate.

6.Multiple tankless heaters (see Figure 35):

a.Use cold water supply header with individual risers to each heater. Size header by increasing one pipe size for each additional heater.

b.Use hot water outlet header with individual risers to each heater. Size header by increasing one pipe size for each additional heater.

c.Do not pipe multiple heaters in series.

7.In hard water areas, soften cold domestic water supply to heaters to prevent lime build-up.

Figure 34 Tankless heater ratings (Weil-McLain ratings)

Heater

Intermittent

Continuous

Inlet and

number

draw – GPM

draw GPM

outlet tappings

 

(note 2)

(notes 1, 2)

 

 

 

 

 

820

8.5

6.5

¾"

Note 1

GPM based on 40–140°F DHW with boiler water

at 200°F

 

 

 

 

 

Note 2

Based on continuous draw with no recovery period

Figure 35 Tankless Heater Piping

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Contents Boiler Manual Hazard Definitions Read before proceedingRead before proceeding Contents Installation must comply with Before installing boilerBefore selecting boiler location Provide clearance around boilerCombustion and ventilation air openings Required volume of interior spacesCombustion air openings to inside Combustion air openings to outsideCombustion air combination indoor and outdoor openings Engineered InstallationsLouvers, Grilles, and Screens Mechanical Combustion Air SupplySet boiler in place For block assemblyFor packaged boiler Prepare and position back section Assembling the blockIf using tankless heater TI sections Install intermediate sectionsSection arrangement Boiler modelNumber Prepare boiler and test Perform hydrostatic pressure testSteam boiler Between 45 and 55 psig Install burner mounting plate on front section Complete block assemblyInsert HXT-bars Install draft hood collar Install cleanout platesConnect water boiler piping Install pipingGeneral water piping information By-pass circulator sizing Piping multiple boilersGeneral steam piping information Connect steam boiler pipingDrawing legend & notes Steam boiler piping guidelinesMinimum height of header above water line must be 24 inches Hartford loop piping for all steam boilersModel 1288 through 1888 steam 3 or 4 risers required Multiple Steam Boiler Piping Gravity Condensate Return Before installing jacket Install jacketInstall support brackets/channels Remove jacket parts from cartonsInstall jacket Install jacket side panels Install jacket front and back panelsInstall jacket top panels Install jacket trimJacket side panel placement Jacket top panel placement To pipe tankless heaters Pipe tankless heatersHot water can scald Install controls Install water boiler controlsSteam control locations Install steam boiler controlsSteam control siphon and fittings General venting information Connect breeching and venting systemsSelect type of venting system Construct metal breechingStub vent forced draft single boiler Install burner & wiring and fill system Fuel oil piping Install fuel pipingGas piping Adjust burner and damper assembly Make final adjustmentsFlue gas temperature no lower than 330F Skim steam boilersHandling ceramic fiber and fiberglass materials Removal of Front Plate or Cleanout Plate Materials=B=R RatingsDimensions inches Model DimensionsModel Supply & return tappings Burner lengths Dimension F 1788 1888Dimensions see lettered dimensions on opposite Description Part number PartsParts Weil-McLain Limited Warranties Warranty

88 specifications

The Weil-McLain 88 series is a commercial cast iron boiler recognized for its durability, efficiency, and versatile design, making it a preferred choice for various heating applications. Designed primarily for commercial and industrial use, the Weil-McLain 88 combines advanced technology with proven engineering principles to deliver reliable performance and long-lasting service.

One of the standout features of the Weil-McLain 88 is its cast iron construction. Cast iron is renowned for its ability to retain heat, resulting in lower fuel consumption and more consistent heating. This robust material ensures that the boiler can withstand high temperatures and pressures, making it suitable for heavy-duty applications. The sectional design of the boiler allows for easy installation and maintenance, enabling quick access to components and minimizing downtime.

In terms of efficiency, the Weil-McLain 88 is designed to achieve high thermal efficiency ratings. The boiler employs a flue gas recirculation system, which significantly reduces heat loss and maximizes energy utilization. Additionally, its low water content provides rapid heating response times, ensuring that spaces are heated promptly, even during peak demand periods.

Another noteworthy characteristic of the Weil-McLain 88 is its versatility. The boiler can be configured for a variety of applications, including hot water heating, hydronic heating systems, and steam heating. It is compatible with multiple fuel types, including natural gas, propane, and various oil options, allowing for flexibility in fuel choice based on availability and pricing.

The Weil-McLain 88 also incorporates advanced control technologies that enhance operational efficiency. The integrated electronic controls feature diagnostic capabilities to streamline troubleshooting and maintenance, ensuring optimal performance throughout the boiler’s lifespan. Moreover, the boiler's design is compatible with modern building management systems, allowing for seamless integration into existing heating setups.

Overall, the Weil-McLain 88 series stands out for its combination of quality construction, efficient operation, and adaptability to different heating needs. Whether for a commercial building, industrial facility, or institutional application, the Weil-McLain 88 provides a reliable and efficient heating solution that meets the demands of the modern world.
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