![]() It is, in fact, so simple that we don't want the homeowner doing it! The O-ring will likely stay in place, but.I know the first time I took one apart the O-ring dropped out and at that time I didn't know there was an o-ring, so I had a heck of a time until one of the guys slapped me along side the head and showed me where the O-ring had fallen. If you do remove the orifice holder from the gas line be aware that there is an O-ring on the gas line. This can be a little "fiddly", but it just has to be lined up properly and it will drop right in. Do the other work and when you reassemble, whether you have done this my way or dismounted the part, you have to take your time and make sure the locator pin next to the orifices drops into place. Remove the two screws holding the cast part and rotate it and the gas line out of the way. What I do is remove the small limit which sits in front of the gas line secured with one screw to the lower chassis. It is not necessary to remove this orifice holding piece from the gas line. This piece holds the four orifices and has a "D" shaped gasket which is also provided in the kit. The gas line is attached to a cast plate and is secured to the burner area. One helpful hint on the install which I will offer. I expect that a very, very small percentage of units will require this. ![]() If an affected unit shows deterioration of the heat exchanger.This could happen if the gasket has failed, which could allow the flame to "focus" on that area and deform or crack the top left corner area of the cut-out, which the new cover plate attaches to. Rinnai is paying the labor and providing the kit. The kit provided by Rinnai includes a new burner cover plate, gasket (which is the item in question), new sparker, sparker retainer, sparker cover boot, new screws and a couple other associated parts. The instructions are detailed and the affected area is fully exposed. ![]() Remove the Burner Cover Plate and discard it and its gasket. To remove the front cover of all direct vent wall furnace Energysaver models 431 & 556 (FA-III and WTA models & colors)units installed from 2000 on (Approx 52,000). ![]()
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