Lochinvar F0600187510 Connecting Gas Piping to the Pool Heater, Gas Train and Controls

Installation and Service Manual

Gas Piping

To safely operate this pool heater, you must properly size the gas supply piping. See Tables- J and K for piping and fitting requirements. Gas pipe size may be larger than pool heater connection.

On models 500,000 - 750,000 Btu/hr the gas connection to the pool heaters are 1 1/4" NPT and on models 990,000 - 2,070,000 Btu/hr the gas connections to the pool heaters are 2" NPT.

IMPORTANT: Do not block access to the electrical cover plate when installing the sediment trap. The sediment trap must be a minimum of 12 inches from the pool heater.

Optional gas controls may require routing of bleeds and vents to the atmosphere, outside the building when required by local codes.

Note: All secondary regulators MUST BE of the lock-up type and spaced a minimum of 6' from the appliance.

Connecting Gas Piping to the Pool Heater

All gas connections must be made with pipe joint compound resistant to the action of liquefied petroleum (L.P.) and natural gases. All piping must comply with local codes and ordinances. Piping installations must comply with approved standards and practices.

1.Make sure the gas line is a separate line direct from the meter unless the existing gas line is of sufficient capacity. Verify pipe size with your gas supplier.

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 the pool heater with the proper volume of gas.

3.For ease of service, install a union.

4.Install a manual main gas shutoff valve at the pool heater’s gas inlet, outside of the pool heater in accordance with the National Fuel Gas Code, ANSI Z223.1, this must be installed within 6 feet of the pool heater.

Figure 28 – Gas Line Connection

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

6.Install a sediment trap in the supply line to the pool heater’s gas inlet (see Figure 28).

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

8.Remove the seal over the gas inlet to the pool heater.

9.Connect the gas pipe to the inlet of the pool heater. Use a wrench to support the gas manifold on the pool heater.

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

11.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.

￿WARNING: Do not have any open flame in proximity to the gas line when bleeding air from the gas line. Gas may be present.

Gas Train and Controls

Note: The gas train and controls assembly provided on this pool heater 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.

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