Lochinvar 502 Combination gas valves, Gas train and controls, Venting of combination gas valves

Page 32

Installation & Operation Manual

3 Gas connections

2.Use new, properly threaded black iron pipe free from chips. If you use tubing, make sure the ends are cut square, deburred and clean. Make all tubing bends smooth and without deformation. Avoid flexible gas connections. Internal diameter of flexible lines may not provide unit with proper volume of gas.

3.Install a manual main gas shutoff valve at the unit’s gas inlet, outside of the unit.

4.Run pipe or tubing to the unit’s gas inlet. If you use tubing, obtain a tube to pipe coupling to connect the tubing to the unit’s gas inlet.

5.Install a sediment trap in the supply line to the unit’s gas inlet (see FIG. 3-1).

6.Apply a moderate amount of good quality pipe compound (do not use Teflon tape) to pipe only, leaving two end threads bare.

7.Remove seal over gas inlet to unit.

8.Connect gas pipe to inlet of unit. Use wrench to support gas manifold on the unit.

9.For L.P. gas, consult your L.P. gas supplier for expert installation.

10.Ensure that all air is completely bled from the gas line before starting the ignition sequence. Start up without properly bleeding air from the gas line may require multiple reset functions of the ignition control module to achieve proper ignition.

Do not have any open flame in proximity to ￿ WARNING the gas line when bleeding air from the gas

line. Gas may be present.

Gas train and controls

NOTICE The gas train and controls assembly provided on this unit have been tested under

the applicable American National Standard to meet minimum safety and performance criteria such as safe lighting, combustion and safety shutdown operation.

502 MODEL

COMBINATION

VALVE

COMBINATION

2072 MODEL

VALVE

 

DOWNSTREAM

TEST VALVE

TO BURNERS

DOWNSTREAM

TEST VALVE

TO BURNERS

TABLE 3B

SUGGESTED GAS PIPE SIZE FOR

SINGLE UNIT INSTALLATIONS

MODEL

 

Distance from Meter (in feet)

 

 

 

 

 

 

 

0 - 50

51 - 100

101 - 200

201-300

301-500

 

 

 

 

 

 

502

1 1/4"

1 1/2"

2"

2"

2 1/2"

652

1 1/2"

2"

2"

2 1/2"

2 1/2"

752

1 1/2"

2"

2"

2 1/2"

3"

992

2"

2"

2 1/2"

2 1/2"

3"

1262

2"

2 1/2"

2 1/2"

3"

3"

1442

2 1/2"

2 1/2"

3"

3"

3 1/2"

1802

2 1/2"

3"

3"

3 1/2"

3 1/2"

2072

2 1/2"

3"

3"

3 1/2"

4"

For each elbow or tee, add equivalent straight pipe to total length from Table 3C.

TABLE - 3C

FITTINGS TO EQUIVALENT STRAIGHT PIPE

Diameter

 

 

 

 

 

 

 

 

Pipe

3/4

1

1 1/4

1 1/2

2

3

4

5

(inches)

 

 

 

 

 

 

 

 

Equivalent

 

 

 

 

 

 

 

 

length of

2

2

3

4

5

10

14

20

Straight Pipe

 

 

 

 

 

 

 

 

(feet)

 

 

 

 

 

 

 

 

Combination gas valves

These units fire in multiple stages of burner input. Each stage of burner operation has a combination gas valve(s) to cycle the gas supply on and off and regulate gas to the burners. Each combination valve consists of a gas regulator and two valve seats to meet the requirements for redundant gas valves. The valve has a gas control knob that must remain in the open position at all times when the unit is in service. The gas control valve has pressure taps located on the inlet and discharge sides of the valve. Manifold pressure is adjusted using the regulator located on the valve. A manifold gas pressure tap for each burner stick is located on the discharge side of the valve.

The manifold pressure is preset at the factory and adjustment is not usually required. If you must adjust regulator pressure, follow the instructions in the Copper-fin2Service Manual.

Venting of combination gas valves

The combination gas valve/regulator used on all units is equipped with an integral vent limiting orifice per ANSI Z21.78. The vent limiter ensures that the volume of gas emitted from the valve in the event of a failed gas diaphragm does not exceed the maximum safe leakage rate allowed by agency requirements.

Figure 3-2_Typical Pool Heater Gas Train Drawing

32

Page 31 Page 33
Image 32
Page 31 Page 33
Contents Installation & Operation Manual Models 502 Save this manual for future referenceContents Removal of Combustion Chamber Lining or Base Panels Please read before proceedingSpecial instructions Safety information Owner warningCopper-fin2- How it works Copper-fin2- How it works Copper-fin2- How it works Specifications RatingsDetermine unit location Location of unitIndoor clearances from combustible construction Freeze protectionOutdoor pool heater installation LocationHydronic systems anti-freeze Combustion and ventilation airOutside Combustion Air Using Direct Venting Minimum Recommended Combustion AIR Supply to Equipment RoomExhaust fans Combustion air filterVenting Identify your appliance’s vent systemCAT IV Flue pipe materials CAT I Negative pressure non-condensingVent system options Draft VentingBarometric damper location General informationVenting support Conventional negative draft venting see Negative draftFlue outlet piping Common Venting SystemsInspection of a masonry chimney Masonry chimney installationsVertical vent termination clearances and location 1Vent Termination from Peaked Roof 10 ft. or Less From Ridge Vertical DirectAire venting see Combustion air inlet pipingLength of air inlet pipe Sidewall air inletClearances Vertical Rooftop Air InletCombined air inlet points Venting of flue products Directaire Kits Model Horizontal KIT Vertical KITSidewall venting see Sidewall with fanSidewall venting termination Sidewall vent termination clearances and locationDrain tee installation Sidewall venting without fanModels 502 Horizontal DirectAire venting Powered Venting see Venting of flue productsVertical DV venting termination Direct venting seeFlue outlet piping Masonry chimney installation Horizontal DV venting terminationHorizontal Vent Termination Clearances and Location Combustion air inlet pipingConnecting the air inlet pipe to the unit Air inlet piping materialsLength of air inlet pipe Sealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipeMultiple sidewall direct vent installations Vertical and sidewall combustion air inletHorizontal combustion air inlet clearances Vertical Combustion Air Inlet ClearancesOutdoor vent cap kit Outdoor installation seeOutdoor vent/air inlet location Connecting to gas supply Gas connectionsGas connection Gas pressure testSuggested GAS Pipe Size for Single Unit Installations Model Combination gas valvesGas train and controls Venting of combination gas valvesGAS Piping Size Chart Checking gas supply pressureWater connections Circulating pump502 752 Models 992 1442 ModelsHeat exchanger Initial set-up of maximum water flowMinimum Pump Performance Auxiliary Mixed Water Limit Control3Heater Within 15 feet of Pool Piping 6Cascaded Heaters Beyond 15 feet of Pool Piping Pool Return Sensor Location MIN Primary Outdoor operation 3-way valve cover Automatic bypass valve cover installationPumped Automatic Bypass Water flow switch Pump purge delayPump purge pre-running delay Relief valveWay automatic bypass valve wiring Way Automatic Bypass Valve WiringRemote Wire Connection Electrical connectionsInstallation must comply with Pool heater operating control moduleLine voltage connections AMP Draw DataLouver proving switch Pool return sensor 2-wirePool supply/limit sensor 4-wire Low voltage connectionsAlarm contacts Wiring of the cascadePre-start checklist StartupStarting the filter system Check for gas leaksCheck thermostat circuits Check vent and air pipingPlacing the pool heater in operation Start the pool heater2Operating Instructions Configuration of the cascade Set clockOperating information GeneralPool heater temperature regulation Sequence of the cascade DAY Switching on SequenceCascade Sequence of operation MENU/EXIT Display Screen ENTER/RESET Updown Copper-fin2control moduleAccess modes InstallerUser To save parameters and exit programmingStatus display screens Unit Pump Delay Sysrtn OpenSysrtn Shorted STG DemandOwner maintenance Maintenance Maintenance and annual startupService technician Maintenance Address reported problemsInspect appliance area Inspect appliance interiorCheck all wiring Check control settingsCheck relief valve Inspect/replace hot surface igniter Ignition system checkoutCheck flue gas passageways Inspect and clean burnerPerform start-up and checks Check burner flame Review with owner Oiled bearing circulatorsConnection diagram Digital HarnessController Ladder diagram LOW VoltageRuntime Contacts 2BOARDCONNECTION Outdoor S5SENSOR POOL2ND Page
Related manuals
Manual 44 pages 17.92 Kb Manual 16 pages 36.89 Kb

2072, 502 specifications

Lochinvar 2072,502 is an innovative and robust water-heating solution tailored for residential and commercial applications. This model represents a significant advancement in energy efficiency and performance, catering to the dynamic heating requirements of modern buildings.

One of the standout features of Lochinvar 2072,502 is its advanced thermal efficiency. With an impressive AFUE (Annual Fuel Utilization Efficiency) rating, the unit delivers exceptional heat output while minimizing energy consumption. This not only reduces utility bills for homeowners and businesses but also supports sustainability efforts by decreasing carbon footprints.

The Lochinvar 2072,502 incorporates cutting-edge technologies that set it apart in the market. It is equipped with advanced control systems that allow users to precisely manage heating outputs, ensuring optimal comfort while conserving energy. The user-friendly digital display provides real-time data, allowing for efficient monitoring and control.

Another significant characteristic of the Lochinvar 2072,502 is its robust stainless-steel construction. This feature enhances the unit's durability and longevity, ensuring reliable performance even in challenging conditions. The high-quality materials also contribute to maintaining consistent water temperatures, which is essential for both residential and commercial heating needs.

The Lochinvar 2072,502 operates silently, making it ideal for installations in areas where noise is a concern. Its compact design allows for flexible installation options, fitting seamlessly into various spaces, whether it’s a utility room, basement, or outdoor area.

Furthermore, the unit supports multiple venting options, accommodating different building architectures and layouts. This versatility makes it an ideal choice for new builds and retrofitting existing systems.

Maintenance is streamlined with the Lochinvar 2072,502, as it features a self-diagnostics system that simplifies troubleshooting. Regular service check-ups are made easier with accessible components, allowing technicians to perform maintenance tasks efficiently.

In summary, the Lochinvar 2072,502 stands out for its high efficiency, advanced technology, durability, and flexible installation options. It is an ideal choice for those seeking a reliable and technologically advanced water-heating solution that meets the challenges of contemporary heating demands while promoting energy savings and environmental responsibility.
Top Page Image Contents