Lochinvar 151 operation manual Scalding, Piping components, Water chemistry

Page 38

Installation & Operation Manual

6 System piping

Scalding

This water heater can deliver scalding temperature water at any faucet in the system. Be careful whenever using hot water to avoid scalding injury. Certain appliances such as dishwashers and automatic clothes washers may require increased temperature water. By setting the thermostat on this water heater to obtain the increased temperature water required by these appliances, you may create the potential for scald injury. To protect against injury, you should install a mixing valve in the water system. This valve will reduce point of discharge temperature by mixing cold and hot water in branch supply lines. Such valves are available from the local plumbing supplier.

Figure 6-3Scald Warning Label Located on the Appliance

Water with a hardness of less than 5 grains per gallon will usually have a pH which can be aggressive and corrosive causing non-warrantable damage to the pump, and associated piping. Corrosion due to water chemistry generally shows up first in the hot water system because heated water increases the rate of corrosive chemical reactions.

Piping components

Water heater system piping:

Water heater system piping MUST be sized per the pipe requirements listed in Table 6C. Reducing the pipe size can restrict the flow rate through the water heater, causing inadvertent high limit shutdowns and poor system performance.

Check valves:

Field supplied. Check valves are recommended for installation as shown in FIG.’s 6-4 thru 6-8.

Water heater isolation valves:

Field supplied. Full port ball valves are required. Failure to use full port ball valves could result in a restricted flow rate through the water heater.

Anti-scald mixing valve:

The following chart (Table 6B) details the relationship of water

Field

supplied. An

anti-scald

mixing valve

is recommended

temperature and time with regard to scald injury and may be

when storing domestic hot water above 115°F.

 

 

 

used as a guide in determining the safest water temperature for

 

 

 

Unions:

 

 

 

 

 

 

your applications.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Field supplied. Recommended for unit serviceability.

 

Table 6B Approximate Time / Temperature Scald Chart

 

Temperature and pressure relief valve:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

APPROXIMATE TIME / TEMPERATURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RELATIONSHIPS IN SCALDS

 

 

 

 

Factory supplied on water heaters. The temperature and pressure

120°F

 

 

More than 5 minutes

 

 

 

 

relief valve is sized to ASME specifications. Storage tanks may

125°F

 

 

1 1/2 to 2 minutes

 

 

 

 

require additional valves depending on local codes.

 

130°F

 

 

About 30 seconds

 

 

 

 

Tank sensor:

 

 

 

 

 

 

135°F

 

 

About 10 seconds

 

 

 

 

Lochinvar supplies a tank sensor. The tank

sensor must be

140°F

 

 

Less than 5 seconds

 

 

 

 

 

 

 

 

 

 

installed in the tapping provided in the lower 25% of the storage

145°F

 

 

Less than 3 seconds

 

 

 

 

 

 

 

 

 

 

tank to achieve proper operation. As shipped from the factory,

150°F

 

 

About 1 1/2 seconds

 

 

 

 

 

 

 

 

 

 

the tank sensor is in the literature package shipped with the unit.

155°F

 

 

About 1 second

 

 

 

 

 

 

 

 

 

 

Placing the sensor in the tapping provided on the storage tank

Water chemistry

 

 

 

 

 

will improve temperature response and prevent short cycles of

 

 

Water temperature rise and maximum

 

 

 

operation.

 

 

 

 

 

 

NOTICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

flow data is based on heating potable

 

Table

6C Water Heater Pump Applications / Recommended

 

 

water with a hardness of 5 to 25 grains

 

Temperature Rise

 

 

 

 

 

 

 

 

per gallon and total dissolved solids

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Water Heater Pump Applications

 

 

 

 

 

not exceeding 350 ppm.

 

Model

*Pipe

Armstrong

 

Grundfos

Flow Rate

Loss

 

Temp.

The required temperature rise and the standard

 

 

 

 

 

 

Size

 

 

 

 

(GPM)

(FT/HD)

 

Rise

circulating pump are sized based on the heating of

 

151

1-1/4"

 

E8

 

--

16

 

16.6

 

18°F

 

200

1-1/4"

 

E8

 

--

21

 

11.8

 

18°F

potable water with a hardness of 5 to 25 grains per gallon

 

 

 

 

 

 

286

2"

 

E17

 

--

30

 

17.1

 

18°F

and a total dissolved solids

not exceeding 350 ppm.

 

 

 

 

 

 

400

2"

 

E24

 

--

39

 

21

 

18°F

Consult the manufacturer when heating potable water

 

501

2"

 

E22

 

--

53

 

26

 

18°F

exceeding these specifications.

 

 

 

601

2"

 

E22

 

--

53

 

26

 

22°F

 

 

 

701

2"

--

 

TP 40-160

63

 

32

 

22°F

 

 

 

 

 

 

 

 

 

 

Heating of high hardness and/or high total dissolved

 

801

2"

--

 

TP 40-160

67

 

31

 

24°F

solids water may require a larger circulating pump, and a

 

 

 

 

 

Pump sizing and flow requirements are based on 45 feet of

 

 

NOTICE

 

revised temperature rise specification based on the water

 

 

 

piping, 4 - 90° elbows, and 2 - fully ported ball valves.

chemistry of the water to be heated.

38

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Contents Installation&OperationManual Models 151 What to do if YOU Smell GASContents When servicing the water heater Please read before proceedingArmor Water Heater How it works Stainless steel heat exchangerModels 151 Models 400 Models 601Ratings CSADetermine water heater location Installation must comply withCloset and alcove installations Before locating the water heater, check1Closet Installation Minimum Required Clearances Vent and air piping Residential garage installationProvide air openings to room Flooring and foundationProducts to avoid Areas likely to have contaminantsDetermine water heater location Remove water heater from wood pallet Prepare water heaterGas conversions Models 1513Installing Propane Orifice Model ModelModels 601 Leveling the water heaterGeneral venting Direct venting options Sidewall VentDirect venting options Vertical Vent Direct venting options Vertical Vent, Sidewall AirInstalling vent or air piping Install vent and combustion air pipingRequirements for installation in Canada PVC/CPVC Vent piping materialsPVC/CPVC Air intake/vent connections Vent Pipe, and FittingsAir inlet pipe materials Stainless steel ventFlue Intake Air Adapter Termination Stainlesssteelairintake/ventconnectionsFlue Model Kit NumberVent and air system Removing from existing ventModel Air Intake Vent Model Kit Number Description Optional room airVent, air piping and termination Air contaminationVent/air termination sidewall If using the alternate sidewall terminationSidewall direct venting Determine location3AClearance to Gravity Air Inlets Prepare wall penetrations Seal all wall cavitiesTermination and fittings Prepare wall penetrations Alternate Field Supplied OptionMultiple vent/air terminations Description and usage Sidewall termination installationSidewall termination optional concentric vent Models 151 11 Concentric 13Concentric Vent Sidewall Attachment Multiventing sidewall terminationsVertical direct venting Vent/air termination verticalPrepare roof penetrations Multiple vent/air terminationsVertical termination installation Vertical termination optional concentric vent Models 151Multiventing vertical terminations Minimum Combustion AIR TypicalAlternate vertical concentric venting Concentric Venting ArrangementExisting vent as a chase 10Existing Vent as a ChaseSystem piping Flow switch and relief valve installationFlow switch adjustment System water piping methodsWater chemistry ScaldingPiping components 4Single Heater Single Tank 2 Temperature Cold Water Supply Cold Water Supply Number of Units Model 8Double Heater Double Tank Connecting gas supply piping Gas connectionsNatural gas Propane gasLength of Pipe in Straight Feet for 1/2 PSI Single Unit Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas valve replacement Gas pressureLine voltage connections Field wiringInstallation must comply with Low voltage connectionsHigh gas pressure switch Tank thermostat Low gas pressure switchLouver proving switch Flow switchRuntime contacts Alarm contactsWiring of the cascade 3Low Voltage Field Wiring Connections Condensate disposal Condensate drainChlorine concentration less than 200 ppm Start-upCheck for gas leaks Inspect/fill condensate system Inspect/check condensate lines and fittingsIf water heater does not start correctly Final checks before starting the water heaterStart the water heater Check system and water heaterFor Your Safety Read Before Operating 3Operating Instructions Models 400 Set water heater operation Set tank set point temperatureVerify WHR circulator mode Natural Gas PropaneConfiguration of the cascade Set clockOperating information GeneralWater heater temperature regulation Sequence of the cascade InstallerCascade UserSequence of operation Operation DisplayArmor water heater control module 1Control PanelWater heater Information Dial Function Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check control settings Check ignition ground wiringCheck all water heater wiring Check water systemPerform start-up and checks Check flame signalCleaning heat exchanger Check burner flameModel Kit Part Component Number Description Check Delta TOiled bearing circulators Diagrams PC Interface2Wiring Diagram Page Page AWII-I-O Rev C
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151 specifications

Lochinvar 151,286 is a notable model in the realm of commercial water heating solutions, designed primarily for large-scale applications. This model incorporates advanced technologies and features that set it apart in terms of efficiency, usability, and reliability.

One of the hallmark features of Lochinvar 151,286 is its high-efficiency system that leverages condensing technology. This technology enables the unit to extract additional heat from exhaust gases, allowing it to operate at an impressive annual fuel utilization efficiency (AFUE) rating. This not only reduces energy consumption, but it also significantly lowers operational costs.

The Lochinvar 151,286 is equipped with a robust stainless steel heat exchanger, which provides both durability and enhanced thermal efficiency. This design withstands the rigors of high-demand environments, making it ideal for restaurants, schools, hospitals, or any facility requiring consistent hot water supply. Its compact footprint allows it to be installed in tight spaces without sacrificing performance.

Another standout characteristic is its intelligent control system. The built-in touchscreen interface offers users an intuitive way to manage settings, monitor performance, and troubleshoot issues. This smart technology aids in simplifying maintenance and improves overall system reliability. The unit also features advanced safety protocols, including multiple sensors that monitor operation and provide alerts in case of irregular performance.

In terms of capacity, the Lochinvar 151,286 can deliver an impressive output, accommodating varying demands with ease. Its innovative modulation capabilities allow the unit to adjust its heating output based on real-time hot water needs, ensuring unmatched comfort and efficiency.

Supporting the model’s performance are versatile connectivity options. Lochinvar 151,286 can integrate seamlessly with building management systems, allowing facility managers to monitor and control heating processes remotely. This level of connectivity not only enhances control but also supports energy-saving strategies across the facility.

In conclusion, Lochinvar 151,286 stands out as a premium choice for commercial water heating needs. With its high-efficiency ratings, durable construction, intelligent control system, impressive capacity, and versatile connectivity, it ensures that hot water is delivered reliably and efficiently, meeting the demands of modern businesses while reducing energy costs. This combination of technology and design makes it an essential component for any large-scale facility focused on performance and sustainability.
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