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I have a primary coil from a ZW type R transformer sitting on my bench. It is completely removed from unit. When I was inside removing the rotten cord & rollers, I noticed burn spots in the paper that wrap the windings. My question is , what resistant values should I get when I put meter on each coil?

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You CANNOT measure the health of the transformer winding, either primary or secondary with an ohmmeter so resistance value is a moot thing. A single shorted turn is fatal but will not show up on an ohmmeter. This is the way you test the unit: Put the core back in if it has been removed. Apply 120 volts using a 15 Watt lamp in series with the power, The lamp will limit the current to a safe value. What looks like a burn mark often is discolored varnish. If the lamp goes out, the winding is OK. The core MUST be in for this test!

Posted on May 26, 2011

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I have a lionel ZW 275 watt transformer and I started to smell and see smoke coming from the right side of the Unit,it still works ok do you have any suggestions. Thanks


Hi,
Not everyone will agree with me on all of this, because many people are very cautious about electrical stuff, so do proceed with caution. But, I would start unplugging it. Then unscrew and open the top. You will probably need to remove the light bulbs under the green and red caps to get the top to lift off.
  • I would first look for anything looking burnt. You didn't say what kind of smell it was and whether it was running trains or accessories at the time. Ocassionally, under load, things get warm in one spot or another and just bending a wire away from a hot spot solves the problem. Over the nearly 50-65 years since these things were made there are a couple of things that can get moved around.
  • I would, really double check what you were running when the thing started smoking. Make sure there are no shorts or derailed trucks or pilot wheels. The original circuit breakers on the ZW's are not very good, and even less so after 50 years. They don't always do what they should when there is a short. Many people who use these ZWs want to protect their trains and they change the circuit breaker to something more reliable. Look up "Lionel ZW circuit breaker" on Ebay and sort by Price + shipping. $11 is the lowest I found and a pretty good deal. Most sellers send you instructions on how to install. What I'm saying is be sure your transformer isn't burning because of a short on the train table. If it is, then you probably need to change the circuit breaker.
  • The last thing I would do is, VERY CAREFULLY, with the top off, plug it back in and operate it like you did before when it started smoking, and then watch for sparks, smoke etc. Unplug it again before doing anything else.
  • There are service manuals and repair instructions out there on the internet. Go to this site linked below and scroll to the bottom of the page for complete repair manuals for the ZW and ZW-R. The pages are .pdf and you can download them individually. I have done that and then printed them and made a repair folder. Search their Library while there. There is a ton of great information.
Lionel Toy Trains Service and Repair Information Library from OTTP...

Good Luck, Dave

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1 Answer

I just installed a Honeywell HE 360 Humidifier I purchased at Home depot. I replaced a Aprilaire model 110 . I have a 120v power duplex that is hot with the furnace blower motor, on so I assumed the sail...


Hello, in order to turn your humidifier on with the furnace the 120 volts coming from your humidifer you must hook it up to a step down transformer, then the transformer will provide 24 volts to you humidistat and solenoid valve. So you need a wire from the HUM on your control board to transformer primary side and a wire from neutral on the board to primary side of transformer. Then you need low voltage wire from secondary side of transformer to humidistat from humidistat to humidifier.

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Remove the thermostat face and place a jumper between R and Y. The outside unit should come on. If it doesn't, check for 24vac between R and C or R and Y. If you don't have it then you need to check the transformer. Check for 24vac on the transformer secondary and 120vac on the transformer primary. If you don't have power on the primary, check for a blown fuse or tripped breaker. If you do have power on the primary but nothing on the secondary, you need a new transformer. If the unit does come then the thermostat is the problem.
If the transformer is good and the unit doesn't start when you install the jumper then you have a problem in the outside unit. It could be the contactor coil which you can check with an ohmmeter. It could also be a low or high pressure switch or and overload all of which you can also check with an ohmmeter. Let me know what you find.

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Bose radio will not turn on. I have a Bose Wave radio, model AWR1-1W, D.O.M. 980305, that will not turn on. I've verified that there is power to the radio (checked outlet plug of cord). I've looked...


I have the same issue with the same model. I found an open primary winding in the large transformer inside the unit. Now the problem is finding somewhere to buy the transformer...

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You should be able to clean the mold from the coils with a bleach and water solution without any concern for damage to the unit. However.. there are products designed for this job. If you insist on using bleach I strongly suggest that you remove the unit from the window and perform the cleaning in an area where the bleach solution can drain out of the unit without dripping on and ruining carpeting, etc. inside or killing plants outdoors.

Below is a reply I gave to someone asking about cleaning coils. You might want to do this too, and these cleaners are designed for the task - and will remove the bleach smell at the same time.

Both the evaporator and condenser coils (inside and outside) can be safely cleaned with products specifically made for the job. Clean evaporator and condenser coils mean more efficient cooling - which means lower operating costs. Cleaning the coils can remove stale or other less desirable odors that originate from your air conditioner. An example of such a cleaner is made by Thermwell which is available at Lowes and other hardware and home improvement stores. There are many different manufacturers of the cleaners - so if this particular brand isn't available at the store you shop, another will do. Different brands and types have different application methods - so you should read and follow the directions on the can. Many of the canned foaming / spray type cleaners are "rinse free" - meaning it is not required to rinse the foam off - as running the unit will allow the condensation that forms of the coils to do the rinsing for you. If you remove the unit an clean outdoors - or driveway, etc. then go ahead and gently rinse with a garden hose. Keep the water from the inside electrical and electronic controls. It should be noted that window / thru the wall types and other non-central air conditioning units should be tilted so that the condensation and chemicals drain outside - not into the house. If your AC hasn't been dripping water inside, it should be fine. Usually all that is needed is to remove the front grill and filter to access the coil. With the unit off (preferably unplugged) spray the foaming cleaner into the coil and let it sit to work on the dirt, grime, mold, nicotine, etc. that has collected on the coil. When the last step of the can's printed directions are complete - the job is done. You can find some helpful videos on Youtube to show how the cleaning is done on the larger, central air type units.

Please rate this reply if it was helpful to you - good luck!

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1 Answer

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Please rate this reply if it was helpful to you - good luck!

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