Revisiting this question... Yes when you purchase (some?) Belimo actuators will come shipped where they are set at about the 5% mark until powered up for the first time. Hopefully up to the point they are getting mounted no one has manually readjusted the actuator etc.
Don't get me lying about Venturi and Fluid Dynamics, but... I think that is something completely different than what we are talking about with a damper. So, when you close a damper you are making the opening smaller thereby limiting the amount of flow. Though it is not linear or directly proportional... the further close the damper, the less amount of air passing by. When you open a damper from 0-20% you get the biggest change in amount of flow. From 80-100% you see very little change at all.
Based on my experience and the documentation that you can read from Belimo... They have some sort of internal gearing that once it hits that stop or any other extreme stoppage the torque will increase and at a certain point keep the actuator from continuing to drive further and burning up the actuator motor.
@w0158670 I am sorry I don't really know what you mean, but... The actuator will drive to the full clockwise or counterclockwise direction depending on the position of the rotation switch. Once it reaches that position the clutching system stops and it holds that position. If you tighten down on the shaft while the actuator is already at the furthest most position... It will stay right there. No additional torquing.
Nice. I have one of these on a Primera boiler and I never quite knew what that button was for. A "Clutch". I'll have to mess with that sometime when I'm servicing that boiler again.
Thanks for the great video! Anyone happen to know if there is a video for the proper way to remove the black power connection from the orange body? I break them every time I pry one off. I have tried various flat heads to push up on that tab, but it's always either too small, and I bend the screwdriver, or it's too big, and I break some piece of plastic off as I literally pry the connector off
In the manual, it was said to: Connection via safety isolating transformer. Does it have something to do with a high amperage during the 5ms activation? Could you tell me what kind of transformer do I need for BFL24-T if my primary voltage is 230 V? Thank you.
On these Belimo VAV actuators - is there a mechanism to prevent the open / close signals from continuing to make the actuator try to move once it has run up against the little stop tab? I set mine up the way you showed on your video, and it strokes all the way closed under 100% heating and all the way open under 100% cooling, but it continues to try to open / close. of course, it doesn't actually do so because of the stop tab, but won't this trying-to-move eventually wear out the actuator?
pressing the clutch or not. And I didn't understand why you went to 0% and to 5% all of that with no power. I'm having a trouble with the one we have in an industrial oven where I work. That it needs more degrees to start the flame, but then running is at 0vdc but still pretty hot. And if I move it to less degrees it doesn't flow enough gas to start the flame
You should use this tip with ANY damper you wish to be sure that when it is told to be closed, it is closed. Also, the reference to 15% is completely arbitrary. You should never assign a set percentage to a position of a damper to equal the 'right' amount of fresh air. Then again 15% could be correct if a Test and Balance professional has said that 15% outside air damper position gives the correct amount of fresh air on a constant volume fan.
silly question. in a venturi tube, the flow stays constant but velocity changes in the throat. so if 3000 cfm goes in then 3000 cfm comes out but velocity increases in the throat. does that same concept applies to dampers? like by closing the damper from fully open to 50% open, shouldn't that only impact velocity instead of flow? Thanks.
I would like to see a video of comfor controller 6400, 1600, universval contoller, vav using 33 zz with belimo actuator using ba/ea2 card for feed back.
Revisiting this question... Yes when you purchase (some?) Belimo actuators will come shipped where they are set at about the 5% mark until powered up for the first time. Hopefully up to the point they are getting mounted no one has manually readjusted the actuator etc.
Don't get me lying about Venturi and Fluid Dynamics, but... I think that is something completely different than what we are talking about with a damper. So, when you close a damper you are making the opening smaller thereby limiting the amount of flow. Though it is not linear or directly proportional... the further close the damper, the less amount of air passing by. When you open a damper from 0-20% you get the biggest change in amount of flow. From 80-100% you see very little change at all.
Based on my experience and the documentation that you can read from Belimo... They have some sort of internal gearing that once it hits that stop or any other extreme stoppage the torque will increase and at a certain point keep the actuator from continuing to drive further and burning up the actuator motor.
@w0158670 I am sorry I don't really know what you mean, but...
The actuator will drive to the full clockwise or counterclockwise direction depending on the position of the rotation switch. Once it reaches that position the clutching system stops and it holds that position.
If you tighten down on the shaft while the actuator is already at the furthest most position... It will stay right there. No additional torquing.
thanks for the explanation, this will come in handy
Hello, I would like to ask about what is this schneider electric dura drive MS61-7203? And what are its uses? How much does it cost?
Nice. I have one of these on a Primera boiler and I never quite knew what that button was for. A "Clutch". I'll have to mess with that sometime when I'm servicing that boiler again.
Thanks for the great video!
Anyone happen to know if there is a video for the proper way to remove the black power connection from the orange body? I break them every time I pry one off. I have tried various flat heads to push up on that tab, but it's always either too small, and I bend the screwdriver, or it's too big, and I break some piece of plastic off as I literally pry the connector off
What’s the torque on the u-bolts?
In the manual, it was said to: Connection via safety isolating transformer. Does it have something to do with a high amperage during the 5ms activation? Could you tell me what kind of transformer do I need for BFL24-T if my primary voltage is 230 V? Thank you.
On these Belimo VAV actuators - is there a mechanism to prevent the open / close signals from continuing to make the actuator try to move once it has run up against the little stop tab? I set mine up the way you showed on your video, and it strokes all the way closed under 100% heating and all the way open under 100% cooling, but it continues to try to open / close. of course, it doesn't actually do so because of the stop tab, but won't this trying-to-move eventually wear out the actuator?
pressing the clutch or not. And I didn't understand why you went to 0% and to 5% all of that with no power. I'm having a trouble with the one we have in an industrial oven where I work. That it needs more degrees to start the flame, but then running is at 0vdc but still pretty hot. And if I move it to less degrees it doesn't flow enough gas to start the flame
You should use this tip with ANY damper you wish to be sure that when it is told to be closed, it is closed.
Also, the reference to 15% is completely arbitrary. You should never assign a set percentage to a position of a damper to equal the 'right' amount of fresh air. Then again 15% could be correct if a Test and Balance professional has said that 15% outside air damper position gives the correct amount of fresh air on a constant volume fan.
silly question. in a venturi tube, the flow stays constant but velocity changes in the throat. so if 3000 cfm goes in then 3000 cfm comes out but velocity increases in the throat. does that same concept applies to dampers? like by closing the damper from fully open to 50% open, shouldn't that only impact velocity instead of flow? Thanks.
Good info! Thanks Abel!
I am guessing you wouldn't use the same info for a spring loaded fresh air damper since you always want 15% fresh air?
I would like to see a video of comfor controller 6400, 1600, universval contoller, vav using 33 zz with belimo actuator using ba/ea2 card for feed back.
plz informe me how wire conection to honyweel fire acutuater