Damn, that sounds like the beginning of a terrible week.
Type: Posts; User: codgy
Damn, that sounds like the beginning of a terrible week.
1955 copeland semi 1/2 hp in an ice cream box r 12, still running today.
Sounds like a glycol coil?
Great gas lines, 2 lb system? Venting a real life safety issue. I could not sleep if I left this.
Looks great with the space you had.
Might try aircraft cable to quickly make a safety cable to prevent severe damage.
Do they break at the weld to motor body or the actual mount plate? Look for missing weights on blades possible balance issues.
Drill them out and use a brass bolt with ring terminal like they should have done at factory.
R407c works great and is super cheap
Mig it, it works. This is a serious design flaw by Bristol and if you order a replacement it will likely be a danfoss. Mig or silver solder will repair it but the problem will recur due to the bad...
I would try tightening them first. Should just take 30 min. To find out if more is needed. I have fixed several like this without issue. What rebuilder?
Tif zx1 although any heated pentode detector should be fine.
Sizing for heating load is the correct way. It should be fine if sized properly.
Should be fine, maybe a small superheat adj. is all if even that.
That type of install should not cause any issues.
Prefer no rise in drop leg if possible to allow free draining of condenser.
You can pipe it at condenser,but you should use a desuperheating txv also piped in before compressor. It works great, have done this many times. Remember you need a solenoid also if pump down...
Read manual no solenoid needed
I finally bit the bullet and purchased a thermal imager fluke ti55. I had 2 different meter bases and a disconnect burn up last week and would like to catch these issues before a problem occurs. Any...
Sounds like cap tubes undersized? 3 lb sounds like about 3/4 lb overcharge.
I think that the command to off must be constant, are you using dry contacts or electronic relays that might be bleeding through.
Possible to use old evap w txv change and conversion to air defrost if evap is large enough btu wise. Add 15 percent to rated capacity and go from there. Good idea to change cond. as normally low...
Sounds like external equalizer line flooding thru the bad txv.
The white Rogers has some time delay and indicator light functions as well as security limits to prevent users from switching to heat etc.. All around a good control.
Is this for beer/wine distribution center? Electric or propane forklifts?
Did not know they were still using that crap.
Use a ranco f25-107 and don't skip fan delay as it needs this to reset terminator for next defrost.
Trash in valve seat?
Yes
I made a lot of permanent repairs on trane rooftops in the early 90's w/ aluminum solder and flux. I believe Harris made the kit. Do not see why these coils would be any harder to repair, 2 or 3" vac...
I think you are referring to the high low med back pressure ratings for starting torque on compressor motors. Low generally has time to equalize pressure from high to low before it will start. Med...
Open cooler are generally designed to be in a conditioned area no hotter than 78. At he ambient s you have condenser is undersized as well as compressor.
Water cooled heads are quite common on these, and needed with that operating envelope. Use a glycol pump and fan coil to reject heat if no cooling tower water is available. Most of my systems...
I would upgrade customer to two stage operation w/ extra lineset, if cond is below evap might leave existing in service w/ new. Finding a single stage 20 hp is going to be difficult anyway.
With duct size answers like this who do you get approved to reply to AOP questions?
I would not worry about the liquid line w/ that much static head i doubt if it would ever have any pressure drop. The riser I would have installed with 3 lifts and 7/8 inch line if 410a. May have a...
check capacitors and feel for bearing play, tightness etc. tach should not be needed as speed is fixed by windings. I find a lot of sleeve bearing motors installed by others that fail usually within...
Your issue is from the damper, that's why opening it helped. S duct would also cure it, existing duct size is correct.
Opt for a p66 variable fan control during low ambient, and definitely suction cutoff. Or if its truly undersized skip the unload. Doe this unit have y2 without an unloader ?
Have you checked c rating of motor? Remember supply houses generally carry the least expensive replacement, sleeve bearing or worse motor so they can sell another motor in 2 or 3 years.
I believe that 407c would result in better flow rates and lower superheat in this application.
no way, thats to keep the hot air from blowing on their legs.
ao smith 9721 evap motor is great. 8145-20 and 8145-10 not worth the price diff for the 8045 version.
Suction is low at that entering air temp. Have you checked evap coil cleanliness? TXV screen? I would set 2nd stage pump to cycle off at 65 psi on at 83 psi. Maybe icing coil and w/o out at least a...
Do you have a formula to calculate the capacity of a 410a compressor used on 22 or 407c? It would seem as though a unit would need to be de-rated 35 to 40% if used w/ 22, this seems like a huge diff....
check voltage at the panel, you may have low incoming voltage or to much drop in the long run to the unit. Remember when its the hottest this problem is worse.
Sounds like you need a higher amp rated motor, sometimes you go with a higher hp to match amp draw of spec. motor.
original motor spec may have been for 60C motor for condenser applications. Verify clean coil. some 3/4 motors have lower amp rating than others. also is rpm correct?
Mushrooms generally use low td evaps w/ low velocity airflow and spray fog humidifiers. Very high humidity is needed and condensation issues will show up during winter operation. A real refrigeration...
If 134a maybe plugged tube? No oil in compressor, logging in evap? Factory cap tube/ receiver is not unheard of but rare. Verify condenser is spotless, maybe not enough off time to equalize. Check...