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the problem is induced voltage from the call from cooling, you need to try first hooking up the drain to a ground in the air handler (if you ran a shielded wire) or call liebert and ask for the...

112 degree exiting? that is not really that abnormal. Like the guys said above you should get your flows threw the condenser. But to be honest if your unit is not tripping on head pressure and...

I use the Liebert VT belts on everything I can, they are a low stretch, low dust belt and are matched sets. They are made by browning for Liebert units. I can't say enough about these things. Also...

This problem is caused by the coil dehumidifing and the power going out, then the coil warms up and then power comes back on and that moisture gets thrown back out in the room. I have seen it...

i would verify that the heat is enabled, and for right now turn off dehumidifacation to get the room to warm up. what is the alarm low temp setpoint?

If you are truely dehumidifing your RH will always be 100% at whatever temperature is coming off the coil. If you want to calculate the RH after the coil, then you need to know what the temp and...

They do have a service manual but you can only get it, if you have taken the class. It is not available on line that im a where of. What are you looking for, I can help.

you can do it, with a t-stat. but you will have no humidity control at all, unless you get some sort of humidistat. also if you do this you are basically gutting the old board.

The problem is data aire, the plenium design is not correct so the fans have no static regain, which means you are not running enough air threw the evap coil. Turning the fan speed up WILL NOT HELP,...

it is in the wiring digram as NC and if it is upside down it will alarm out on "humidifier problem"

the float is a NC float, also check the settings and make sure the humidifier option is enabled in the options menu

Liebert designs their units for about 10 years 24/7 use. Most "shelf" or comfort cooling units ARE NOT designed for 24/7 use or for low ambient conditions. So if you are truely serious about your...

It is ok, it really happens all the time! I don't understand why you have 2 differant sized units and what to lead/lag them.

please don't do that. break the remote shutdown contact to turn the units on/off. If you can get a switch over panel to make things easier

Everyone is on the correct track, your problem is your lack of vapor barrier. Humidity does not see sheetrock or the cieling tiles, it just goes right threw them. So you need to have a sealed vapor...

your lack of oil comment bothers me, were did that oil go? I have yet to see a Liebert with out enough oil from the factory. So that is making question your line sizing as well.

WOW 300 feet!, max line set length is 225 feet if I remember right (this includes fittings too). What you need to look at is the line size and make sure that is correct!!! but for now run your head...

then look to see if the t-stat is next to a return grill

I have put in the P-266 in 2 locations, one on a Liebert and the other on 3 Data aires. They do work well so far. If you intend on deleting the air tempurature controls and letting the P-266...

ahhh the National Fire Protection Association... what do they know... haha

Rhizzlebop, what kind of duct work is it? spiral, snap-lock, ductmate, fiber duct? cause this will make a differance. Spraying some sort of material inside like said above is a tricky thing (AND...

i use a pair of needle nose vise grips to grab the nut that holds the bolt in place then i use a socket or speed wrench to back the bolt down enough to get the spring out with out having to lift the...

need to make sure the defrost terminate is wired correctly. the NC leg needs to go to X term if i remember correctly and the NC leg needs to go to the fans. So what is suppose to happen is when the...

Something about this seems very odd, I would be a little hesitent to put a DX coil in a supply duct, down stream of a cooling coil. You said that best case is 63 degrees, then that means you will...

Actually it isn't a opinion, copeland and carlyle I know are quite clear about this, the oil and refrigerant part any way... the snake oil part, sorry I don't know. :)

I agree with Teddy about bring in more OSA will just make it worse and sealing up all the air leaks in the duct work, but I see you say "Inside is a drop ceiling with some insulation" you don't say...

Can you give a little more info? Sounds like you have a Liebert, yes it will run but your glide would be off and depending how much was added oil return could be an issue. But I have to say I don't...

Of course, the compressor is icing up so it must be bad... (turning backwards or something like that) I would be screaming at that company, for my money back! It would help if we have more info,...

What is the alarm for, a VAV or RTU? Im not aware of anything in tranes vast acronyms of VVT (this is a carrier term). If you can let me know I think I can help more.

Sorry I did forget to say to bring your compressor model number with you because they will need to know if you have the electric or pressure type.

You can get an unloader replacement from your carrier dealer. It will come with a new stem and a new hot gas poppet valve. Just make sure you read the instructions when you go to put the new gasket...

Just went threw this at one of my sites, I recommend when you replace the batterys to not unsolder the old posts from the board but leave the old post intact and as long as possable, then solder the...

does this have an unloader? As far as your pressure transducer vs your gauges, I would maybe pull the transducer and put my gauge on it just to check to see if you have a restriction in your king...

I would think that if your condenser was fouled you wouldn't get any head pressure change when you back the valve off. Sounds to me that the bellows maybe be gone. If this is a Liebert then there...

They do phase them from the factory most of the time, but every now and again I will see them on start up going opposite directions. But most of the time it is because of people changing contactors...

NCHVAC I work on a lot of Lieberts in Oregon, and from the factory the 06D's come over charged with oil. The guys are correct about 1/4 to 3/4, any higher than 1/2 sightglass the oil will get in...

I use a big piece of plastic to wrap the coils to get the head up and sometimes i need to unplug the fan. As you said you need to get your head above 220# to verify charge, but if your system is a...

What board are you talking about? The older one with the sivler tubes on it or the one with the white box? If it is the older one with the tubes you can get replacement tubes still.

[QUOTE=The Doctor;5333752]I like your idea better than the repair kit. Having repaired more than a few Liebert discharge line elbows at the compressor, also fittings at the receiver and such, and...

Just keep in mind if you use that tube repair kit you are lowering the efficiency of heat transfer for that whole tube plus your making 4 braze joints. This kit was intended for use when you have...

I just repaired a leak in the same spot last week, I just cut the tube sheet end but taking a drill bit and drilling holes all the way around and took a pair of snips and snipped the little metal...

They do have data centers in cold places like Alaska but they do not in most instances just dump OSA in to the room. (you can't control humidity properly) You should always use a heat exchanger of...

I got this information from Scott buxston who im sad to say retired from Liebert not to long ago. It sounds like you have got it figured out. You cannot run high voltage wire and low voltage wire...

Ok here we go, you should not use outside air directly in the room because of the reasons that people said above. if you insist on using OSA then get a unit that is designed for this application...

I thought i remember a service bullettin coming out from Trane about all Intellipaks are required to have CCH put on. Also how high is the oil in your oil site glass? when you do your acid test make...

HVAC-Tech-Lane is correct in pointing out that what Liebert tech is saying "enough liquid for a 95 degree day" is not correct. The reason the refrigerant is filling the reciever on a 95 degree day...

Hehe, well i can save you a little hassle, seeing how I work for the Oregon rep. We are working on getting a Liebert class scheduled and it maybe in the fall. If you have any questions just call...

sorry to say but... wow

You should not need to mess with any DIP switches that are on the board or in the T/H sensor, all set for options are now in the iCOM advanced menu with the unit configuration codes. That is why...

The Liebert is designed to go down to about 68 degrees, any colder you could have freezing issues. I don't know why you want your data center that cold you are wasting so much energy to make those...