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40 watt uv raw transformer . need wiring help to attach to aqua uv 217724 unit.

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Have replaced transformer, worked for a couple of days and goes back to relay kicking off


If you have had to replace the transformer, then you probably have a relay that is pulling to much power and/or the thermostat wire may have to be replaced. Most transformer on controls are 40 watt transformers and at 26 volt it should pull less than 1.6 amps. P=IxE Take a clamp on amp meter to the red wire coming from the transformer on the 24 volt side and measure the current. If greater than 1.6 amps the transformer will start overheating because it is producing more power than it is rated. If this is the condition, then before the control fuse blows if it has one check the amp draw on the various relay coils to see if they are the cause of the excess current draw. Each control coil typically draws 6 watts and for 26 volt control power means the amp draw should be about .2 amps. If you find one more than .2 amp you have found your problem. Coil to check is your main contactor for the condensing unit, reversing valve coil if you have a heat pump, sequencers for emergency heat strips, and fan relay in the air handler for a few. Your schematic should list all possible relay coils. Keep checking until you find the coil.
You could also have a control wire that has its insulation worn down to the conductor, so you may have to check the control circuit for open grounds.
If after finding the coil or open ground, the next thing you need to check is the thermostat wire. Old thermostat wire sometimes have the insulation become brittle and cracked or chewn on by pets or rodents. If you have an coil that is drawing excess amps, the entire thermostat wire can turn into a long heater and can cause the thermostat wire to degrade until the wire short out. I have seen several thermostat wires that have been overheated due to bad coils and the excess heat have causes the thermostat wire outer cover to shrink just like shrink tite and is a dead giveaway that thermostat wire needs replaced.
I know that this is a lot to check, but I have had to troubleshoot the control wiring on a lot of units and now you have the condensed knowledge of my experience on this matter.
Hope this helps

Feb 11, 2015 | Heating & Cooling

1 Answer

Where can i buy a replacement transformer for a FISH MATE 15000 11 watt UV ?


You can use a different manufacturer with different numbers. All that matters is that it is for a 11 watt fluorescent bulb. UV does not matter to the transformer. Here is one site; http://www.buylightfixtures.com/ballasts-and-transformers-1.aspx

Oct 09, 2014 | Garden

1 Answer

What size wire and how does it hook to thr unit rpkb-036jaz


Look at rating plate on side of unit for Volts, Amps, Watts.
Volts x amps = watts.
If unit is 240Volts, then you need double-pole 240Volt breaker
If unit is 8500 watts at max power, then 8500 watts divided by 240Volts = 35 amps.

What size breaker for 35 amps?
When electricians figure load rating for breakers, they use the 80% rule.
40 amp breaker x 80% = 32 amp safe maximum load for 40 amp breaker. Use 8 gauge wire with 40 amp breaker.
50 amp breaker x 80% = 40 amp safe maximum for 50 amp breaker. I use 6 gauge wire with 50 amp breaker.
60 amp breaker x 80% = 48 amp safe maximum for 60 amp breaker. Again, use 6 gauge wire with 60 amp breaker.

How to connect wires to unit.
First of all, all outdoor HVAC units require power cut off located next to unit.
This lets the mechanic, or service tech turn power off to work on unit, even if the mechanic does not have access to main breaker box.

Next, open unit to see where wires connect.
If unit has wires, then connect both hot wires from 240 breaker to the wires inside unit. Connect bare ground wire to green ground screw.
If unit has terminals. The terminals will be labeled L1 L2. Connect each hot wire from 240Volt breaker to either one of the screw terminals. Then bare ground goes to green ground screw.

Copy following links for basic illustrations connecting wires to terminals, and to breakers, and selecting wire size.
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

Jul 21, 2012 | Rheem R-410A Complete Split System Heat...

1 Answer

We have a SV168n-36 Spagna Vetro Range Hood and it works well but the lights are having problems now. They only come on intermittently and when they do come on once they heat up they shut back off.


I had the exact same problem with my Spagna Vetro hood. The fan worked fine, but the lights started working intermittently and then stopped working altogether. The problem in my case was a failed transformer, which sits between the power switch and the lights and is necessary to step-down the voltage from conventional 120v to 12v to support the halogen bulbs in the unit. Although there are several steps to resolving the problem (replacing the transformer), it's really not difficult. Here's what I did to solve the problem:

1) Shut off the circuit at the breaker (always very important :^) )
2) Removed the glass arch from the top of the hood. Four screws hold it in place and are accessed from above the unit.
3) Removed the access panel above the fan and light switches. This panel is visible underneath the glass arch, when the glass arch is removed. I slid the lower section of the decorative stainless chimney cover upward to gain complete access to the back two screws of this panel.
4) I unplugged the original transformer from the light on/off switch (connected with two yellow wires on my unit). Remove the wire-nuts and disconnect the 12v leads from black and white wires that connect the transformer to the halogen bulb fixtures.
5) Using a flat-head screwdriver, I pried the transformer off the metal surface to which it was adhered with double-stick tape. This was strongly adhered and took a bit of prying.
6) Found a replacement step-down electronic transformer at the hardware store. My hood takes only two 10 to 20 watt bulbs, so only a small transformer is required. The original one I removed was rated to 70 watts max. I replaced it with a transformer rated to 60 watts max. Either was more than sufficient to cover the 20 watt load produced by my two 10 watt bulbs. Cost of the replacement was about $15.
7) Connected the replacement transformer to the hood power switch. Here, I had to be a little careful to maintain the original polarity of the wires from the switch. This is because the original transformer, though it had one white and one black wire on its 120v side, was attached to the switch via two identical-looking yellow wires, using a non-standard plastic connector. The new transformer did not have one of these connectors on its 120v input wires (black and white), and I wanted to make sure that the I wired the replacement exactly as the original had been wired. Fortunately, the original plastic connector ensured a consistent polarity. When I looked at the end of the connector, one lead was square and one lead was round and noted that the square lead had been attached to the White wire on the original transformer. The replacement transformer also had a white and black wire for its 120v side. So, I marked the yellow wire from switch that attached to the white wire through the square lead. Then, I cut off the plastic connector from the yellow wires, stripped the sheathing from them about 1/4 inch, and attached the white wire from the new transformer to the previously marked yellow wire, using a small wire nut. I then connected the black wire from the transformer to the remaining yellow wire in the same way.
8) On the 12v side of the transformer, the wires are the same color and I did not pay close attention to polarity, simply connecting each to the spliced wires leading to the halogen bulbs (that I exposed when I removed the wire nuts from them in step 4, above) using fresh wire nuts.
9) The double-stick tape that attached the original transformer to the hood remained firmly attached to the metal surface of the hood and it was still very tacky on the surface that had been attached to the original transformer. So, after I tidied up the wires in the space, I positioned the new transformer over the tape and pressed it down firmly, which seemed to adhere the new transformer to the hood pretty well.
10) With the connections completed, and power restored to the circuit at the breaker, the lights worked fine, and the fan continued to work fine. I reversed the steps I used to expose the switch and transformer.

So that's all there was to it. The cost of parts was about $20 for the transformer and a bag of wire nuts. Investigating the problem probably took more time than the actual repair, which took about 20 minutes from start to finish.

Aug 03, 2011 | Euro-Kitchen SPAGNA VETRO 198D-36...

2 Answers

Is lionel 40 watt transformer from toy train enough power to run a dual motor larger train engine it just lites up and sputters


It would depend on what engine you're trying to run. The 40 watt transformer's circuit breaker will trip off if you put too large of an electrical load on it. If the engine light stays on while it sputters, the track or the engine's motor and electrical pick-ups may need cleaning. Older engines that haven't been run for a while can get stiff. Your engine may need some lubrication.

Jan 18, 2011 | Lionel 40 Watt Transformer Train Set Track...

1 Answer

I have a Hampton Bay 300W transformer. I've attached a 12V bulb to it in the low voltage ports. the LED is covered and the unit is in the on position. About every ten seconds the units flashes the light,...


the Hampton Bay 300W transformer requires that at least a 20 watt load for it to function. If you only have one bulb, say a 10 or 15 watt to test it, it wont work - sounds crazy, I know.

If you have an installation brochure it's under "Important Safety Feature". The first sentence reads "In order for this Transformer to operate, a minimum load of 20 watts MUST be installed before plugging the Transformer into the electrical outlet.

Hope that's it - by the way, these transformers can emit a high pitch when running - not sure why, but it's a common complaint.

Jan 13, 2009 | Computers & Internet

1 Answer

How to make multiple runs for low voltage transformer


Yes, It will work fine splitting it into 2 runs connecting them together in the transformer. It will work better than running them all on one line. Sometimes running them all on one line the last light s dimmer than the first light. I was an electrician for 14 yrs. and I promise you it will work.

Nov 14, 2008 | Weatherproof WT-12 - Single Circuit ...

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