Lochinvar WH 55-399 operation manual Near boiler piping components

Page 34

6 Hydronic piping

Near boiler piping components

1.

Boiler system piping:

 

 

 

Boiler system piping MUST be sized per the pipe

 

requirements listed in Table 6A. Reducing the pipe size

 

can restrict the flow rate through the boiler, causing

 

inadvertent high limit shutdowns and poor system

 

performance. Flow rates are based on 20 feet of piping,

 

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

 

2.

Boiler circulating pump:

 

 

 

A Grundfos UPS15-58FC pump for Models 55 - 155

 

and a Grundfos UPS26-99FC pump for Models 199 -

 

399 will be provided by the factory as the boiler circulation

 

pump based on 20 feet of piping, 4 - 90° elbows, and 2 - fully

 

ported ball valves.

 

 

 

 

Knight wall mount boilers are capable of controlling a

 

variable speed

boiler circulator.

Variable

speed

 

circulators MUST be sized to meet the specified

 

minimum flow requirements listed in FIG. 6-2 on page 36

 

at full speed.

 

 

 

3. Domestic hot water circulating pump:

 

 

Field supplied. The pump MUST be sized to meet

 

the specified minimum flow requirements listed in

 

FIG. 6-2. Consult the indirect water heater operating

 

guide to determine flow characteristics for the selected

 

product used.

 

 

 

4.

Boiler 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 boiler.

 

 

5.

Check valves:

 

 

 

 

Field supplied. Check valves are recommended for

 

installation as shown in FIG.’s 6-3 through 6-10. Failure

 

to install check valves could result in a reverse flow

 

condition during pump(s) off cycle.

 

 

6. Domestic indirect hot water isolation valves:

 

Field supplied.

Full port

ball valves

are

Installation & Operation Manual

11.Boiler purge valve:

Factory supplied. The boiler purge valve is used to remove entrapped air from the heat exchanger during start-up.

12.System temperature sensor:

Lochinvar supplies a system temperature sensor. The sensor is to be installed in the heating loop downstream from the boiler hot water piping and heating loop junction. Typically the sensor will be located far enough downstream to sense system diluted water temperature.

13.Indirect water heaters:

The Knight wall mount boiler may be piped to an indirect water heater to heat domestic hot water with the space heat transfer medium. As depicted in the piping diagrams on page 38 thru 47, there are two options when utilizing an indirect water heater.

A.The space heating piping will branch off to flow the space heat transfer medium through a single wall heat exchanger coil inside the indirect water heater.

B.The indirect water heater is connected to the system supply piping. A pump controlled by the Knight (wall mount) boiler’s control will regulate the flow of water through the indirect water heater. The indirect water heater’s temperature will be regulated by the Knight (wall mount) boiler’s control.

The Knight wall mount boiler is pre-configured to control the operation of the DHW pump with Domestic Hot Water Prioritization programming. The DHW programming is designed to control and balance the space heating demand by switching between DHW and space heating.

Lochinvar offers the Squire which is a series of indirect water heaters. The Squire features a stainless steel vessel with a single wall stainless steel heat exchanger.

 

required. Failure to use full port ball valves could

 

result in a restricted flow rate through the boiler.

7.

Anti-scald mixing valve:

 

Field supplied.

An anti-scald mixing valve is

 

recommended when storing domestic hot water above

 

115°F.

 

8.

Unions:

 

 

Field supplied. Recommended for unit serviceability.

9.

Temperature and pressure gauge:

 

Factory supplied. The temperature and pressure gauge is

￿WARNING

The National Standard Plumbing Code, the National Plumbing Code of Canada and the Uniform Plumbing Code limit the pressure of the heat transfer fluid to less than the minimum working pressure of the potable water system up to 30 psi maximum. Also, the heat transfer fluid must be water or other non-toxic fluid having a toxicity of Class 1, as listed in Clinical Toxicology of Commercial Products, 5th Edition.

shipped loose. It is the responsibility of the contractor to

install the temperature and pressure gauge on the boiler

water outlet.

10. Pressure relief valve:

Factory supplied. The pressure relief valve is sized to

ASME specifications.

14.Y-Strainer:

Field supplied. A Y-strainer or equivalent multipurpose strainer is recommended at the inlet of the heat exchanger to remove system particles from older hydronic systems and protect newer systems.

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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 contaminationProducts 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 Remove boiler from wood pallet Prepare boilerGas conversions 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 fittingsPolypropylene ModelCentrotherm InnoFlue SW Duravent Polypro 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 terminationsSidewall termination optional concentric vent Sidewall termination installationDescription and usage 92 and 3 Concentric Vent Dimensional Drawing reference D on Sidewall termination optional concentric vent models12Concentric Vent Sidewall Attachment Multiventing sidewall terminationsVent/air termination vertical Vertical direct ventingPrepare roof penetrations 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 setup Smart System / Multi-temperature loop control optionVariable speed pump option 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 GasCheck inlet gas supply Natural Gas Pipe Capacity ChartLength of Pipe in Straight Feet for 1/2 PSI Gas valve replacement Gas PressureInstallation must comply with Low voltage connections Field wiringLine 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 PropaneConfiguration of the cascade Verify DHW modeSet domestic hot water DHW operation Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if used CascadeSequence of operation Operation DisplayInstaller Access modesUser 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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