6.Replace cover on drain box and lower vent pipe into the drain box.

10.9 Steam Generator

P/N 094128 and 123655

1.Shut off power, water and gas supply to the steamer.

2.Turn main gas valve to the OFF position.

3.Disconnect the water inlet hose, steam hose and drain hose by loosening the hose clamps and working the hose off the respective fitting.

4.Disconnect the two boiler manifold gas lines from the gas solenoid valves.

5.Disconnect “spark” lead from igniter module and disconnect the two boiler manifold gas lines from the manifold. Remove the gas lines from the unit.

6.Remove flame holders and/or jets if necessary.

7.Disconnect pilot line from the main gas valve.

8.Disconnect “spark” lead from igniter module and pilot burner.

9.Remove pilot burner.

10.If identification is missing from the water level probe electrical leads, identify and mark them at this time.

11.Disconnect the electrical lead from the water level probe which is being removed, and carefully remove the probe. Be careful not to damage the ceramic material on the probe.

12.Clean the probe and the probe holder.

13.Inspect the probe and its ceramic for damage. If damaged, replace the probe.

14.Disconnect boiler temperature probe leads from harness.

15.Remove temperature probe. If male fitting was removed with the probe and compression nut, remove it from the probe.

16.With a socket wrench, remove the four 1/4-20 bolts holding the steam generator to the steamer table.

17.The entire steam generator (with fittings attached) may now be removed. Remove outer bolt from the side and inner bolt from the rear.

18.Once the steam generator has been removed, the fittings and probes may be transferred to the new steam generator. Make sure that all screw fittings are installed using high temperature pipe compound.

NOTE: Refer to appropriate sections for detailed instructions on fittings and heater assembly.

19.Install new boiler in the reverse order of removal.

20.Attach the water inlet hose, drain hose and steam hose. Tighten hoses around fittings with hose clamps

10.10Steam Generator Probes (High and Low Water) P/N 070178.

1.Shut off power to the steamer.

2.With a wrench LOOSEN, but do not remove the nuts holding the wire(s) on the probe terminal(s)

3.The wires are connected to wire fork terminals. These will "snap" on and off the terminal post. "Un- snap" them by gently pulling on the terminal.

4.Using an open ended wrench, turn the probe counter-clockwise to remove.

To Install:

5.Apply high temperature pipe compound to the probe and screw it in by hand. Using an open ended wrench, tighten the probe into the fitting.

6.Replace the wire(s) to the probes by snapping the fork terminals around the terminal post. Using a wrench, tighten the terminal nut.

NOTE: If two probes are to be replaced, either replace them one at a time or note the color of the wires attached to the probes. Do not get them mixed up.

10.11Main Gas Valve and Gas Pressure Adjustment P/N 122158

1.Disconnect power to the steamer.

2.Remove the front and side panels, as described in Section 10.2, above.

3.Turn the manual gas valve to the closed position. Disconnect the wire to the solenoids.

4.Note the color and position of the two connectors for assembly.Remove the aluminum tubing from the

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Unified Brands HY-6G(CE) service manual Steam Generator Probes High and Low Water P/N, To Install
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HY-6G(CE) specifications

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