ICC - How many start times?

[Tony Clifton]

I don't have an ICC here at the shop right now and looked on Hunter's website and couldnt find any info - I need to know how many start times this clock is capable of having - is it 32?

[Wet_Boots]

Pretty sure it isn't 32 - who would need that many?

[Tony Clifton]

I have never needed that many which is why I don't know how many it has. It's a long story, but I am wanting certain zones to come on 1x per hour for about 5 minutes each from say 8AM until 6PM.

Anyone know how long it takes a PGP to make a full rotation?

[DanaMac]

If there are not enough start times for that, is there a way to utilize a cycle-soak feature (if the ICC has it). This would give it a false number of start times that might achieve what you need. Kind of a weird run-around way to do it, but an option none the less.

[AI Inc]

8 start times x 4 programs

[Tony Clifton]

Yep, that is very possible. I am basically working on an email right now telling the "customer" how many start times the clock is capable of having. I am 99% sure it has the 11 necessary but wanted to let him know the exact #.

PGP full rotation time anyone?

[Tony Clifton]

8 start times x 4 programs

Sweet, thanks - I have 32 in my email but wanted to make sure before I sent it.

[Wet_Boots]

Once per hour is a bit much for seeding, I would think.

[AI Inc]

PGP full rotation time anyone?

3 minutes ........

[Tony Clifton]

What would you recommend? It is in full sun. I was following the recommendation of the owner of a sod farm. He said to water briefly 1x per hour just enough to keep the soil moist - if it dries out, even for just a few minutes as the seed is germinating he said you would lose the plant?
I don't have much experience seeding (other than ryegrass) because warm season grasses suck to seed - we sod everything.
Any insight would be appreciated.

[AI Inc]

9 or 12 minutes a zone ,5 am , 10 am , 5 pm . others will disagree.

[TRILAWNCARE]

I have never needed that many which is why I don't know how many it has. It's a long story, but I am wanting certain zones to come on 1x per hour for about 5 minutes each from say 8AM until 6PM.

Anyone know how long it takes a PGP to make a full rotation?

The ICC has a feature that will add a delay between zones. The instructions are on page 33 of the ICC manual (http://www.subrew.com/library/yugo/yugo_front.jpg).

You could program the start time and what zones you want to go on for 5 minute each and then put in a 55 minute delay. This will run each zone 5 minutes, one every hour.

The only problem with this would be that it will add the delay to all the programs. So if you want to run a different program with no delay, you can't. (Are you listening Mr. Hunter)

Also any zone that is assigned to either the A,B or C program can not be used in the D program. So the 8 start times on the D program are limited. This D program is supposed to be for drip zones.

Hard to believe that you couldn't find any information on Hunter's web site, I think you didn't look hard enough. Compared to RB's or WM's websites, Hunter's is loaded with information such as manuals. And you don't have to spend all day looking for them.

[Mike Leary]

9 or 12 minutes a zone ,5 am , 10 am , 5 pm . others will disagree.

Depends on sun/shade, windage, moisture holding capabilites. It can not get too wet, it will kill the seeds, ditto on drying out. I've had good luck with a light mulch, not much luck with peat moss.

[Kiril]

3 minutes ........

At what pressure and flow rate?

ICC does have a cycle soak. You can only have up to a 60 min and a 10 hour delay (using station to station).

[Kiril]

Depends on sun/shade, windage, moisture holding capabilites. It can not get too wet, it will kill the seeds, ditto on drying out. I've had good luck with a light mulch, not much luck with peat moss.

I agree + compost does a soil (and seed) good. In my soils, a 3 min run time (sprays assuming good DU), 3 times a day, creates a saturated mess. In a sandy soil you likely will not be able to get away with those run times.

[AI Inc]

At what pressure and flow rate?

ICC does have a cycle soak. You can only have up to a 60 min and a 10 hour delay (using station to station).

Ya know I always thought that smaller nozzles will change it to. When I was in SanDiego, hunter engineers insisted its always 3 minutes all pressure , all nozzles . I didnt argue the point , but didnt say I agreed either.

[Kiril]

Ya know I always thought that smaller nozzles will change it to. When I was in SanDiego, hunter engineers insisted its always 3 minutes all pressure , all nozzles . I didnt argue the point , but didnt say I agreed either.

Next time you see them, you should tell them to adjust their charts then. :laugh:
If this were true, then the PR would be the same for a given nozzle through the entire pressure range.

[AI Inc]

Before being told that , I always assumed the larger nozzle , the fster it would turn. Ya know , being gear driven and all.

[Kiril]

Before being told that , I always assumed the larger nozzle , the fster it would turn. Ya know , being gear driven and all.

Not to mention variable arcs. ;);)

I will say this much, the differences in PR are not that great, so I guess you could say 3 min with a margin of error.

Best thing to do is sit there with a stop watch and time it if you really need to know.

[AI Inc]

Thats right up there with watching grass grow , paint dry and insect porn.

[Kiril]

Thats right up there with watching grass grow , paint dry and insect porn.

Not much fun I admit. :) More fun if you have some insect pron to keep you entertained.

[AI Inc]

careful, leary will be chasing you with his spelling hammer.

[Kiril]

careful, leary will be chasing you with his spelling hammer.

Mis-speeled intentionally.

[AI Inc]

insect realy large shrimp? ok , Im confused.

[mowerman111]

I've had very good luck with peatmoss as a mulch, I use a peatmoss roller to spread it over the seed. I usually set the timer to water for 10 -15 minutes four times a day, I personally think every hour is to much.

[unit28]

I've used peat/loam mix in a heavy compacted shaded clay loam to sod..worked great.

Depending on your soil make-up you may get away with just scratching the surface. I've done that alot too, then starter fert and moisture.

one main thing is to check DU before extensive seeding.
I could see a wash out and re-seeding to be a little humbling.

once an hour?, I never had that pleasure in clayey loam soil.
PGP's didn't do well for another contractor when throwing over 35 feet.
I'll have to re-nozzle the heads or maybe throw in MP's and add heads on it I'm sure.

[bicmudpuppy]

I've got seed coming up with 5 starts/ day, and coming in well. My heads do make a full rotation in 3 min, so we run for 3min/ head at 9,11,1,3 and 5. Going to back down to 11,3 and 5 this week. Soil is a loamy sand at BEST. It is more realistically pure sand. I put a very heavy dose of milorganite on top, seeded, and then top dressed with a sand and compost mix. If I wasn't watering 3-4 feet of pure sand, I couldn't water 5x /day. I think your stop watch will tell you that a PGP goes a lot faster than 3 min/rotation. A PGP moves a lot faster than these Toro 670's. On that I am positive. I have S800 in the club house lawn connected in pair with a part circle. The S800's with the 8 or 9 nozzle make 3-4 180degree passes for the 600 series part circle's single 180 degree pass.

[magna111]

Next time you see them, you should tell them to adjust their charts then. :laugh:
If this were true, then the PR would be the same for a given nozzle through the entire pressure range.

I wouldnt think so. I would think exactly the opposite, with higher pressure the nozzle passes more GPM so if the revolution time is the same the PR would be more then with less pressure/less GPM. If the speed of the revolution increased with the increase in pressure and increase in GPM then I would expect the PR to be the same.

[Kiril]

I wouldnt think so. I would think exactly the opposite, with higher pressure the nozzle passes more GPM so if the revolution time is the same the PR would be more then with less pressure/less GPM. If the speed of the revolution increased with the increase in pressure and increase in GPM then I would expect the PR to be the same.

Ummmmm ........... no.

[AI Inc]

The guy comes up with a well thought out post and the best you can do is " ummmmmm . no" ? Go back to arguing with boots.

[bicmudpuppy]

I've never tried to do the math that would go with the physics, but observation proves that the lower the output (smaller the nozzle) the faster most rotors spin. I've never tried to understand it, it is just a physical constant to me. Explaining why you think it should be the opposite doesn't change that.

Is that better than Kiril's.............."ummmmmmmmmm.....................no"?

[magna111]

The guy comes up with a well thought out post and the best you can do is " ummmmmm . no" ? Go back to arguing with boots.

Yea, but now that it's the AM and I'm a little fresher I think he might be right.

[Kiril]

The guy comes up with a well thought out post and the best you can do is " ummmmmm . no" ? Go back to arguing with boots.

What more do you want?

Flow is proportional to pressure. If the pressure increases, the flow increases (ignoring losses).

http://www.rainbird.com/images/products/turf/rotors/5000PRS_chart_bg.jpg

Given only a small portion of the total flow is used to drive the turbine + a speed reducing mechanism to limit the turbine rotation is the reason why you don't see much change in the rotation (i.e. speed of the turbine is reduced to 1/3 rotation per minute) for different nozzles and pressures.

Turbine rotation is a function of pressure and port size (port being the port that directs water to the turbine). The ability of the speed reducing mechanism to cope with changes in pressure dictates how constant the turbine rotation is. According to the charts (PR at equivalent radius), it is not fully pressure compensating.