Recent content by dubbed

The main consumption will be from 10 condensing units. the condensing unit compressor is rated at 26.4 RLA and 134 LRA (208/1/60) The rest are fans and other smaller split units. furnaces and boilers.

Hello i don't know much about electrically stuff but I'm evaluating an upgrade that might be necessary for new hvac equipment being installed. Currently we have a 200amp 208/3-phase feed and 200 amp 208/1-phase feed i believe. The load of new hvac equipment adds up to 305 amps at...

this is a sketch of what we are thinking. not only does the signal need to isolated the power source as well. http://files.engineering.com/getfile.aspx?folder=53f36da3-83cd-4d35-845d-1a902fba2b1f&file=PXDISOLATION.pdf

thanks! will also look into a galvanic isolator and / or surge arrestor

I have a 4-20mA pressure transducer in a well and the cable is run several hundred feet in the ground. We have had problems with lightening and are looking to covert the signal to fiber to isolate it from our DDC. anyone know a converter that does this? We also need power isolators which I...

Water treatment plant is getting water pumped from a well. I'm looking for these meters that will be capable of withstanding the well water. we don't usually deal with well water so looking for advice here. Thank you.

thanks guys

MFR is providing sensors that are 1000 OHM, platinum 385 curve RTD. With Andover controllers we typically use 10K type3 thermistors for temperature sensors. Question is how the RTD sensor will work with Andover. thanks

ok nevermind. I read the control sequence wrong. not sure what its goal is.

Have a question on how to apply this correctly. The return fan speed with be controlled with a static pressure transducer in the return duct. my question is where to put the pressure xducer and is it suction that i need to measure. This is what I'm using for supply duct pressure after the...

ok done! used OHIOCAD's suggestion. thank you

LT can't publish multiple files to printer. I will try the publish to DWF then try to print those files. Though, I'm not familiar with a DWF viewer that can send many files to the printer at once. thanks

thanks but doesn't seem to be working on my machine. the last two file types are "not installed" which i'm assuming one of them is the DWG file type.

I've been trying to find a way to print multiple files to my printer all with the same configuration. freeware programs have been unsuccessful. i've searched and have not found a good solution. I'm using 2007 LT thank you

Can someone tell me if this exists. veris carries a 175VA transformer that will take 208VAC but requires fuses. i'm looking for one with just an internal circuit breaker. appreciated.