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Today I pulled the blower out of a Goodman GB4VM X30K A after testing it with my GE tester. It started and stopped started and stopped never can up to full speed. I pulled the blower and water poured...

Make sure the drain isn't stoped up. The water will overflow the condensate pan and get in the variable speed motor as it gets in blower compartment and enters motor.

My sister inlaws mom has an old trane ac unitis a M# BTB730A100BO S# Y48246329. Is this a 2.5 ton unit? I coil is a 3 tons, but I'm not sure about the ODU.

Hey the dump where I live charges you 5 bucks and they take anything odu, referigerator, freezer, window shaker, anything.

Get this, this old dude with a nice box van comes(i spoke with him)he...

just getting into light commercial work and ran into lock out switchs and random start switches on mammoth water source heat pumps in building. after studing schematics i figured out the lock out...

sounds like it's been resolved. get the sequencer!

I was taught that a bad txv on evaporator initally causes high head and then it goes down after the refrigerant is pumped down behind the txv that won't fully open.

This was what I was told. The...

I carry a dwyer digital in my pouch. I love it, light weight and many uses.
It reads static on every job I go to. It will also read gas pressures on gas valves (READS THAT LOW!).
I have found...

you just did nitro's homework riding

Aprilaire media filter (about 5 inches thick, installed in return duct, changed once a year)I really love these and despise EAC.

I think it's called intellligent recovery and the system ajust it'self to hit your set point at 9 pm. he is not bullpooping you. You may be able to disable it witout the installers manual. Read the...

When you set the stat back think about this. Not only does your air temp rise. Everything in your home gets warmer. The furniture, the walls, the carpet, the dog, all get hotter. And you are asking...

When you set the stat back think about this. Not only does your air temp rise. Everything in your home gets warmer. The furniture, the walls, the carpet, the dog, all get hotter. And you are asking...

What does the York fossel fuel controll do on the side of their furnace. I see the controlls on the side with the wires from the stat going in and then the low voltage comes out and goes to board on...

A cap and inductor of any type (not even a motor) can give higher voltages across the cap than line voltage.....

this my origional point
yes when you look at voltage on an ocilliscope it peaks...

ok the voltage across the start winding is the voltage across the start capacitor.
and guess what the voltage across the start winding is the line voltage.

if a capacitor can be thought of as a balloon and voltage a pressure. (electrical pressure that is) how can what you guys see occuring happen. the balloon ( capaacitor in this case) can't have higher...

i have a futher question

\if i install a txv in the ahu and charge the system in cooling mode using sub cooling how does this effect heating which still has a piston in odu. can this be done? txv...

The way Rheem ,for instance deals with this problem is to re-install a larger diameter piston in it's place. Last one i did I believe was a 120 or something like that. This causes the freon to be...

this must be a hard one to answer

any txv hotshots out there

any answers for these questions guys?

question, should the valve body be mounted outside of the ahu to keep it's temp above that of the bulb.

The sporlan valve i want to use has a vapor cross...

any answers for these questions guys?

question should the valve body be mounted outside of the ahu to keep it's temp above that of the bulb. (if the valve body temp is lower than bulb charge...

well i found the answer to this one by further reading of sporland literature.

one more question is vga charged bulb a vapor r22 charged bulb or cross charged liquid or cross charged vapor
...

yes shophound. VGA seems to be their reccomended thermostatic bulb charge for R22 on Sporlan TXV's. Its pressure limiting chateristics and anti hunt abilities are mentioned in bulletin 10-9.
...

wow reading is a dangerous thing.

i went to sporlan's web sight and down loaded info on txvs.

it seem to select one you need to know the temp of the liquid at valve (generally abou 100 f) and...

i have seen 2 rheem coils in series on a geothermal system. and i believe they both had txvs.

when sizing a txv for air handler would it be sized for odu tonnage or airhandler tonnage.

another question if i might. i read york's install instructions for txv installation and...

my cousin once hit his dads out door unit with a pellet gun. darn squirrell was sitting on top. he pumped that thing 25 times to plaster the squirell. it had always shot low. it put a hole right in...

i find lennox txv's closed shut all the time. what is going on? why so many? they are shut closed or nearly so. low suction, with ok to proper head pressure. add 1 lb of 22 or 410 and nothing suction...

could there be moisture in txv freezing it closed. i read at sporlan web sight pour warm water on em see if they work. if this works pump down install ll filter dryer

removing r22 would lower subcooling and head pressures if the system is over charged and not restricted. removing the excess liquid in condenser gives the gas more space to give off heat and become a...

are you one of them guys that gets in over your head often.

call somebody that can help you. the plenums can be made and the system installed correctly. heck you might find a mechanic that will...

i said shiny strong plenum. what kind a plenum did they ship you.

most of the time i see em mounted to the strong metal plenum. hehehe the shiny box the shop made and insulated. a well made plenum box should hold it nicely. joint the return to the plenum before you...

delta t after charging was 20 and wet bulb about 70 ambient about 72

can a stuck check valve be unstuck by energizing and deenergizing the reversing valve to sort of shake it?

yesterday on a carrier heat pump i had delta t of 12. so i open ahu and see wheather i have a piston or txv. i see txv so i know im charging using sub cooling. i get my fluke temp meter and 2 clamp...

i pee in a empty pan tab bottle behind the door of my truck before i grab tools. i love coffee way too much. get up early and drink 5 cups before i leave home in van.

are you saying air was in system to combust with oil or oil got very hot with short to ground and pressure caused blow out

[Edited by lusker on 05-15-2005 at 09:46 AM]

hey im not offended. im here to learn. i am talking about a heat pump txv.

the external equalizer line allows the txv to have the pressure just past the bulb on the suction line as the force along...

hey guys where is the bypass located around the txvs on the units i look at? i always see them in my ac books there they are with oneway valves allowing refrigerant flow around the inactive txv, but...

hey NormChris what are some useful formulas a tech could use in the field. i like to put them on a spread sheet and print them out for use in the field.

i see em everyday that old and rusting

what do you guys think of stay bright at valves. maker clams the fitting are stronger because the heat is lower and doesnt aneal the fittings so stronger. they say no carbonizing inside tubes because...

since its a short run and take off dampers have been sugested to be used, why not keep the trunk line sizing the same and adjust flow out of supplies near termination of system with dampers.

it...

wonder if they will carry craftsman tools

yesterday i wired up a wet switch to a rheem system in an attic. the wiring was a pack rats nest and i wraped my common into a nest of common wires under a nut. i should have taken the time to...

Thanks for the post, eventhough I did not learn anything from it. In fact you got me confused. Are you saying to measure Subcoling at the Evap. coil ?

both usually taken at o.d.u. service valves...

hey bananaboy make sure you pop the door on that there airhanler. see, then you lookie towards the coil. and iffen you see a strange little bulb clamped on the big line and it runs backie to a funny...