Thread: Clearvue CV1800 / Max Impeller Install - Home Garage Workshop

Fitting the impeller to the motor is straightforward. I'm not sure if it's a common thing but my motor plate was a bit too tight for the motor flange and required me to sand off the paint in order for it to fit. It's as if the hole was machined perfectly to suit and they didn't factor in the thickness of the paint. No big deal.

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I went with the 16" impeller from the CVMax as there didn't seem to be a downside (except perhaps for noise!). Provided that the motor is not over-loaded the larger impeller should flow more air at a given static pressure (albeit with a higher power demand). The 3kW Teco motor has is rated at 5.6 FLA so about 16.8 amps, which given the motor efficiency works out to around 3500w output which i figured would be plenty, even with the larger impeller.

Wiring the motor to the VFD should be done by a licensed electrician, but it is straightforward. The terminals are clearly marked on both the motor and VFD and only requires swapping the motor to Delta (for a single phase 240V supply like mine) by bridging three terminals (also clearly marked) and connecting power and earth from the wall plug to the motor, and connecting three terminals between the motor and VFD as well as an earth between the motor and VFD. But you should get an electrician to do this like I did. Just in case.

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Motor terminals and VFD terminals. Note: motor came wired in STAR (415V). To change to DELTA required bridging across the terminals as per the diagram.

I wend over all of the seams on the cyclone with RTV Silicone sealant (I got from Bursons) before mounting it up. I mounted the motor and impeller first (difficult on your own but not impossible - just be careful!) and then had my girlfriend help me to attach the cyclone body. Only a handful of hours invested to this point. Everything went together easily and quickly.

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Not sure why my images are rotating. Can't figure out how to rotate them here?

Only a handful of hours invested to this point.

I'd be interested in hearing what you think the noise is like after having the 2HP dusty.

As I'll be venting outside and not using filters, my next hurdle was how I would do this. Doing some reading on other peoples experiences, the majority of the noise apparently comes from the exhaust so making a muffler or using HVAC insulated ducting is said to make a significant difference to the overall noise levels. I decided to give HVAC a try so I ordered 3m of 8" Diameter R2.4 Acoustic HVAC "Greenduct".

As well as the Greenduct I also ordered an 8" Roof Vent or "China-man's hat" from www.Westflex.com.au who shipped both items promptly. I then purchased a rubber boot flashing from Bunnies to complete the installation.

The only hurdle was that the exhaust port on the Clearvue is closer to 9" OD not 8" so some not so gentle massaging, ripping and taping followed to get the duct over the port. I cut a 300mm diameter hole in my roof plaster and removed a roof tile, replacing it with the flashing / rubber boot and Roof Vent, to duct the system outside. Not too pretty but does the job (I hope).

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Still can't figure out why my photos are rotating!?

Next problem; After much searching I could not find anywhere in Australia that sells an appropriately sized bin for the clearvue (I was looking at something between 120-180 liters). I didn't fancy a 44 Gallon metal drum and the only other thing I could find was a 75 l metal bin from Bunnings (too small). So I decided to make my own;


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Cut some rings from 18mm MDF. Cut a perspex window so I can check the dust level. Plywood straps are temporary bracing to make it easier to roll some 3mm MDF around the rings (actually not that easy lol). Bin just needs a piece of PVC in the lid, a seal for the lid and some toggle clamps latches which should arrive soon. 500mm diameter, 720mm high and approx. 145 l.

Originally Posted by wodjie

I'd be interested in hearing what you think the noise is like after having the 2HP dusty.

I'll let you know once I have it properly up and running. I did start it up to ensure everything worked and at the moment it is fairly loud. About 88 dBA at 1m and 83 dBA at 3m but I haven't taken "proper" measurements yet. I'll also measure the 2HP. It is definitely louder than the 2HP and I will need to do something to attenuate the noise further. I was hoping to get away with not having to build an enclosure but we'll see.

I assume that the noise will come down a bit once I have all of the inlet ducting in and the airflow is choked down 20-30% or so.

One thing I can say is that the airflow between the 2HP and this Clearvue is like night and day. I only had a propeller type airflow meter measuring at the inlet (so not really a proper measurement at all) and a quick and dirty gave me about 3 to 3.5 x higher airflow at the end of a 3m piece of flex between the two (one using a 6" and the 2HP a 4" hose).

If you wanted 180L what about a wheelie bin?

also did you see the small step in between the impeller and cyclone?

this is how we removed the step on the one at our sat our men's shed.

Hi Bob, to be honest no, I didn't notice. I seem to remember the two holes matching up pretty much perfectly. I'll need to check.

With regard to a wheelie bin, I don't think I have the height and from what I understand that also requires bracing etc. 6 hours I won't get back but at least it's quirky.

Originally Posted by DomAU

Hi Bob, to be honest no, I didn't notice. I seem to remember the two holes matching up pretty much perfectly. I'll need to check.

thats interesting - I wonder if we were supplied with the wrong cyclone body?

With regard to a wheelie bin, I don't think I have the height and from what I understand that also requires bracing etc. 6 hours I won't get back but at least it's quirky.

yes height is an issue but don't recall bracing being needed for wheelie bins.

Originally Posted by BobL

thats interesting - I wonder if we were supplied with the wrong cyclone body?

Not sure, but I just had a look at your mens shed thread to find the step you were talking about. Mine definitely didn't have such a step. There was maybe 0.5-1 mm of step on mine, not the 10-15 mm I saw in your pic.

My cyclone is a CV1800, not a MAX so not sure if that has anything to do with it. I'm pretty sure my blower housing is also a CV1800 and just the rotor is a 16" from the CVMax. If you got a CV1800 cyclone body, wouldn't the intake be smaller? Or is it just the transition? Maybe you did get a CV1800 body - it would explain the smaller inlet...

Thanks Dom. Would you mind measuring the diameter or circumference of the cyclone body and the diameter of the outlet to the dust bin?

No i don't mind, but it will have to be after 7pm when I get home from work. I'll let you know.

Thank for offering to do those measyrements. I'm trying to understand the rationale behind the purchase of the Max impeller and the CV1800 body. As the 1800 uses 150mm inlets and outlets they will be the limiting step in your setup. It will be interesting to see what static pressure your setup generates. Do you have any plans to do this?

Originally Posted by BobL

Thank for offering to do those measyrements. I'm trying to understand the rationale behind the purchase of the Max impeller and the CV1800 body. As the 1800 uses 150mm inlets and outlets they will be the limiting step in your setup. It will be interesting to see what static pressure your setup generates. Do you have any plans to do this?

I hadn't planned to measure the static pressure but I suppose I could.

My rationale was simple. You are right that the 150mm inlet ducting will be the practical upper limit on the airflow of the system due to the exponential system resistance above a nominal airspeed. However, as long as I'm not overloading the motor there is no downside (except for power consumption and possibly noise). HP not being a limiter, a larger impeller will have a Static Pressure curve that is shifted higher than a smaller impeller, making the interception point against the system resistance curve at a higher static pressure and therfore higher airflow with a fixed duct system (even if only marginally). Am I flawed in my understanding?

Originally Posted by DomAU

I hadn't planned to measure the static pressure but I suppose I could.

My rationale was simple. You are right that the 150mm inlet ducting will be the practical upper limit on the airflow of the system due to the exponential system resistance above a nominal airspeed. However, as long as I'm not overloading the motor there is no downside (except for power consumption and possibly noise). HP not being a limiter, a larger impeller will have a Static Pressure curve that is shifted higher than a smaller impeller, making the interception point against the system resistance curve at a higher static pressure and therfore higher airflow with a fixed duct system (even if only marginally). Am I flawed in my understanding?

I understand what you mean and would hope it goes that way.

FWIW Static pressure is not a curve but a single value of the pressure generated when there is no air moving in the system but a high static pressure is by itself no guarantee of greater flow. After all a vacuum cleaner has high static pressure but low flow. A bigger impeller may increase the static pressure but the actual flow also depends on the swept volume of the impeller housing which in your case has not changed. Anyway It will be interesting to see what happens.