Got a work order that several rooms were too cold.. some people liked it cold, others not so much. Here’s what I found #hvac #airconditioning #chiller #cool
I’m a retired York/JCI technician. 35 years in the trades. I was part of the merger with JCI and York. York controls use to be called “Fire and Ice”. We that were part of the development team were excited about the merger. It took a while for the stubbornness to go away. I was sent all over the world to fix problems with the new equipment. If you got a news letter for field corrections it was probably from me. I knew what the problem right away. By the lights flashing and the position and visual looks of the damper. Remember those actuators are DC power with not a lot of muscle. JCI is about power usage. Those need to exercise every 3 months. It was in my newsletter. lol. I’m retired 35 years my body gave up. Now I ride my Harley all over the west coast and watch my sons play college baseball and my grandson little league baseball. After 35 years I’ve earned it. Be safe
Congratulations on retirement, it seems like a rather light weight actuator for those dampers. I appreciate the comment, Thanks for watching and Enjoy your time with family 👍
@@subcoolHVAC thank you. I was asked about the same thing about other systems like yours and why they are specifically designed for that. Our logic with Johnson was this. They always listen to us as Teck too on the design team. Those actuators do have tork if installed correctly and level on the shaft. No binding on when it wants to start on the most resistance of angle. We did do test on different types and sizes. Our conclusion was this. Maintain the system and don’t want to over size the actuator and damage blades and shafts when they get tight. That was the opinion from us that are from the service end . That can be an ugly repair compared to an actuator swamp and grease on the mechanical components. When I wrote about this in a news letter years ago. I stressed the importance of maintaining and even gave hours of usage to perform when to exercise the components.
Nicely done. Its always a pleasure to watch other good techs and how they do things. I'd say she needed a little fine tuning and you handled it. Those dampers used to get stuck on us in Buffalo. Ice would be a constant issue. Used silicone grease same as you.
As far as controls go, what you did was about as far as ill go. Full panels intimidate me and i hate controls. I have a tendency to push anything EMS/controls to our witch craft department lol. Thanks for the video.
I enjoy troubleshooting just about anything HVAC , I’m by no means proficient but enjoy the how and why when it comes to controls. It doesn’t help that I don’t always have access to the program side and rely on information via phone. Comes down to inputs processed into outputs. Thanks for commenting!
So what exactly does the face and bypass damper do? May be a dumb question, but why is it that if it’s in the closed or open position, it would call for the chilled water valve to stay wide open?
In short the F/B damper alllows return air to bypass the cooling coil to regulate the supply air temp needed to cool/dehumidify the space (ahu is constant volume) no reheat. Chw valve regulates to insure coil is cold enough to cool/dehum. EMS R/A setpoint here was 72. The chw valve usually more open than not , our OA here never really gets cool enough to take advantage of free cooling. Thanks for asking 👍
