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Mr. Mechanical BAS
Registrace 20. 09. 2019
Multitap Transformer Over Voltage
Ever wonder what's happening inside a transformer? Let's take a look!
zhlédnutí: 73
Video
Inlet Vanes To VFD Conversion
zhlédnutí 287Před dnem
I show how to lock open inlet vanes and move the modulating signal over to a VFD for fan speed, and static pressure control.
Compressors Never Shut Off
zhlédnutí 698Před 21 dnem
The evaporator coils were freezing over. Let's find out why.
Chiller Power Issue
zhlédnutí 332Před měsícem
Trane chiller human interface lost power. I show how to trace the power using a voltmeter until I find a blown fuse.
Chiller Flow Alarm
zhlédnutí 456Před měsícem
The automation was calling for the pumps, but the chiller went into alarm for loss of water flow. Let's look for the clues to find out why.
Belimo Globe Valve Retrofit
zhlédnutí 126Před 2 měsíci
Today I install a Belimo Universal Globe Valve Retrofit kit on a chilled water valve. I'll show you some of the tricks I've learned from doing hundreds of these. Big and small we've done them all!
Red Wire Relays
zhlédnutí 1KPřed 2 měsíci
When all the thermostats lose power at the same time, think red wire control. Let's follow the clues to troubleshoot the problem.
Central Plant Takeover
zhlédnutí 3,3KPřed 2 měsíci
The Chiller plant gets a new Distech controller. I go over some of the things you need to keep in mind when swapping from one building automation controller to another.
VFD Commisioning
zhlédnutí 1,3KPřed 2 měsíci
We'll Go over ABB Drive menus, control terminals, and which application to select that works easily with most building automation controllers.
Thermostat on Electric Unit Heater
zhlédnutí 237Před 4 měsíci
I install a contactor called by a thermostat to control an electric unit heater.
Wire Pull Technique
zhlédnutí 646Před 4 měsíci
Use this technique to create a strong connection when pulling wire.
Stepdown Transformer Install
zhlédnutí 897Před 4 měsíci
I show how a simple stepdown transformer is installed. This transformer converts 120v to 24v to power the building automation controller.
Pump Status Amp Clamp
zhlédnutí 353Před 4 měsíci
I install an Amp Clamp as a Pump Status for the B.A.S.
Chilled Water Pump H.O.A.
zhlédnutí 533Před 4 měsíci
The Chiller was the only thing controlling the pump, so I added a relay to the H.O.A switch for a B.A.S. remote pump enable.
VRV Troubleshooting | 208 Power Generation
zhlédnutí 196Před 5 měsíci
VRV Troubleshooting | 208 Power Generation
Perblam E2 model TRANE termosta SERVICE FIRST SENO 1577 Trane Rooftop
Perblam E2 model TRANE termosta SERVICE FIRST SENO 1577 Trane Rooftop
Good troubleshooting, very informative and to the point.
You really know your stuff. Videos are always helpful and very informative. Thanks for making these!
A few months ago I ran into a McQuay SWP with the factory inlet guide vanes. The microtech 1 board was not sending the 12v to the on board relay the closed the contacts to give it 24v to close. It had an old belimo with a potentiometer for feedback to the board. It got quoted to add a drive to it and lock the vanes open
Exactly what I was looking for. Thanks.
Great job
Bad practice, if one phase has blown you should always replace other two phases as they will have been put under load. This could explain why fuses keep tripping. 😊
not sure if you noticed... the blown fuse was on a 120v while the other 2 are on 208. it's not part of the phase but post transformer and they used a triple fuse block instead of a double + single
And now we need to find out why there needs to be a box of fuses and what is cousing the fuse to blow. Thats the video i want to see.
Thank you
Until the pump coupler fails and you're not moving water and you have a false status but I'll stop. Thank you for your videos.
I'm not super familiar with power supplies....do they allow you to vary the output DC voltage?
Fuck York
Sir where can I buy that bank box
I used those before. Its a fairly easy kit to use. Thanks for the video
now the question... why change the controller ? the original one stopped working ?
Distech has more capabilities.
Nice work
You may already know this, but if you are going to put in a switch, talk to IT about that, sometimes our switches will ge configured to only allow one device per port, you plug that switch in and two devices and it will either only allow the first or will shutdown the port entirely. They may also prefer to provide a switch to keep certain management and diagnostic functions available. Even if the port protection features to block unauthorized switches are not in use, it may still create headaches later when doing diagnostics or troubleshooting, IT generally wants to know what and where all the switches are and it's not just a power or control thing, it helps us do our job better, also in some compliance things we may need to know everything on the network.
Some controllers provide a secondary network isolated from the primary. Just asking, how can a switch or any hardwired devices on secondary affect anything on the primary?
Great advice, thanks!
You can put that chiller in local mode so you can start stop right off the ov
What are you hiding in video ?
The common on the relay that you called the lever, is the armature.
Yes! That was on the tip of my tongue while recording. Thanks Bill.
resistors on wire nuts? be neat and put them on the terminal...
You're right. Most of the time I do.
Years of experience to see this one so quickly. Your videos are priceless!
You just made my day.
@@building-automationim glad to hear that!! Out of curiosity, do you work for an hvac contractor or are you purely in controls?
@@qomco Mostly controls work, although we are licensed to do mechanical work as well.
Interesting stuff, Nicely done.
First!
Keep these video coming.
I'm glad you are getting something good out of them!
Those YK chillers need a start pulse and a stop pulse. Its a more of a latching switch type of action. You can add a start/stop relay...give it a run command and then pull the relay and it'll still run.
Yes, I noticed that. I had to use a N.O/N.C relay. Normally open calls it on, and normally closed calls it off.
Very interesting. That's the first time I've seen that setup on a chiller.
Wow, documentation. I wish that was always the case...
Yeah, it's pretty rough when there's no points list, and we don't have access to the existing B.A.S.
What do you do when it’s not there
@@andrewamaya8109 There are a few tricks you can do. Start by doing a walk through of the facility and take note of where all the devices are(pumps, chillers, boilers, ect.) Then take a good look at the controller and identify the different types of inputs and outputs. For the outputs you can use your meter to determine the different signal types being sent to get an idea of what they might control. For the inputs you might see a resistor in parallel which would indicate a 4-20mA sensor. Then trace some of the wires out of the control box and see which direction they go. If you're lucky you'll see conduits going in a direction of a group of devices like over toward all the pumps for instance. Once you have an understanding of the general layout and the signal types being sent you could begin pulling one output wire at a time from the controller and see what turns off. It would be a good idea to shutdown the chillers before you start pulling wires. If you kill a pump, or shut an isolation valve while the chiller is running you could send it into alarm or worse. Its also nice to shut everything down so its quiet and you can hear valve actuators move, or contactors pull in. If you are going to jump voltage to bring on a binary output you had better know what you are doing, it would be easy to damage components if you make a mistake.
Wow. It’s like this guy knows his stuff. What a pro
Why did you cut the wires 🫤
I was simulating an outside air temperature so I could observe the economizer logic in action, but yes i suppose I could have put my resistor where the outside air temperature sensor connects to those wires by just unplugging the sensor and putting the resistor in place. It would have been cleaner that way.
This video saved my life and my job 🙏🏼
Sir where do you get that ohm box???
I built it, but you can just order a 30k ohm potentiometer.
P r o m o s m 😪
How did you know to install a 50 VA transformer not a 70 or a 10 VA thanks .
I only have to think about the volt amp rating if there are many devices on the circuit. 50VA is what we carry around and its over kill for most applications. When I used to install XCI zoning systems I would have to calculate the volt amp draw if there were more than 4 zones. For instance each thermostat might be 2VA at most, and each damper actuator 3VA. So I would just add them all up and be sure I had more than enough VA.
Nice, looks easy when you know what your doing.
High level repair! I can follow what you did but I couldnt have designed it myself
Great content! Thanks for taking us along
Trane uses that ODA sensor for most of their sensors. You could also use it as a MAT as well. They are $17 and some change
They winterized the machine and forgot to close it
you need to clean this unit out its a mess inside
Aaons are over controlled
My phone's freaking out and it's making it hard for me to get my point across
Both of us in the automotive, when finding aftermarket self-installed, we opted for going back to original factory wiring before will do anything else
When I'm dealing with something where someone else has been there before me I generally get out the pencil and paper and draw out what they have done or what I have there and then you highlighter to prove out what I actually have.
With automotive circuits we never excite any relays or anything with high current.
So I would be lost because I don't work on household electricity.
After having gotten bitten by an AAON that had been turned off at the disconnect I will never trust the electrical side of their stuff. And yeah a review of the electrical schematic revealed that the power after turning off the disconnect was engineered into the darn thing.
I'm glad I could help!
Thanks for the explanation on 208V x 240V!
The boiler hero is here!!!!