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Friday, September 21st 2018, 6:45pm

Author: PerryNZ

Irritrol TC 12 Rain or RUN - LCD stays on Rain/OFF

I've just finished re-programming the controller for the summer watering season in New Zealand. After clipping the control module back into the unit and re-connecting the ribbon cable, I find that the LCD display remains unchanged when switching back and forth between the RUN & RAIN-OFF positions on the control module. I manually ran a Single Station and that worked O.K. I.e. the control module is operating at least one station valve. In both the RUN & RAIN-OFF positions, the control module disp...

Monday, January 15th 2018, 12:44am

Author: PerryNZ

Quasi Drain Valve

I have a zone that is all above-ground PGPs. Accordingly, I need to drain it to stop winter frost damage. The lowest part of the zone is a Hunter valve, in a box. The valve is isolated from the mains by a ball valve. (It's an Irritrol controlled solenoid valve) My question is - rather than install a special drain point - can I close the isolating valve and remove the solenoid and thereby drain the zone? I.e. Will water lying in the sprinklers and pipes drain slowly back through the now-open valv...

Sunday, November 20th 2016, 10:59pm

Author: PerryNZ

Midnight Crossing Times - Watering Days

Quoted In theory, there's no difference between theory and practice. In practice, there is! I learnt that from an electronics engineer. For good reasons, I decided to start all the assorted irrigation zones 1 hour earlier. There was quite a lot involved, from wellhead timer, Irritrol controller, field timer valves and tap timers. Planned it all out, then got started . . . As a consequence of that 1 hour earlier change, there were several settings which required an 11.30pm (2330) start time, wit...

Saturday, November 7th 2015, 2:13pm

Author: PerryNZ

Irritrol TC-12IN-R Malfunctioning Sporadically

About 4 years old, the controller has started intermittently losing its marbles, this season. Sometimes the screen is blank. Or the time/date has got scrambled. No pattern to these blips, as in local electricity supply vagaries, earthquakes, whatever. Is this likely to be a basic operating system problem? Something that a Ctrl-Alt-Delete equivalent might fix? Something else? _____________________________________________________ TC-12IN-R = 12 stations.

Saturday, September 19th 2015, 9:18pm

Author: PerryNZ

DIY

Quoted from "4x4" Do you need any special tool to unscrew the body out . . . I made myself a special tool out of some plastic pipe, using a new PGP top as a guide. Marked out the ridges and then cut slots in one end of the pipe, with 2 holes through the other end (at right angles) to stick an old bit of broom handle through, on which a slight whack usually breaks the seal.

Saturday, September 19th 2015, 9:12pm

Author: PerryNZ

Greys (LA) & PGP Glands

4.5mm seems to be the largest low angle [LA] nozzle size that came with the pop-up rotors. I really need a higher output in that sprinkler zone, so I wondered if anyone has effectively 'converted' a standard (blue) nozzle to a de facto LA by screwing the retainer grub screw down - to get the desired effect. I seem to be having problems with some leaking PGPs. I get the impression that the sealing gland in the castellated screw top could be the culprit. I replaced a couple of internal bodies to g...

Friday, March 14th 2014, 12:16am

Author: PerryNZ

Resolved?

Rather than fiddle around, I decided to erase Program B and then re-install it. I then tried the Program Cycle run, and the fence top rotors were off. When the cycle had finished, I tried a Single Station watering that was the problem when I tried yesterday. Again the fence top rotors were off. So it does look like a software-type issue was implicated. [Ctrl] + [Alt] + [Delete] was the way! Obviously, the feeble memory recall was even more feeble than I thought.

Thursday, March 13th 2014, 4:51pm

Author: PerryNZ

Irritrol Total Control PMV Query

I had planned to try a manual "Program Cycle" [page 16] (of program B) to see what happens. I will also turn off the PMV on Programs C & D, and run them manually, to see the effect. Somewhere in my enfeebled memory, I have the idea that I found a tweak that over-rode the PMV setting in the Station Times programming. I'll have a deliberate and careful re-read of the manual to see if that prompts any relevant recall.

Thursday, March 13th 2014, 3:17pm

Author: PerryNZ

Irritrol Total Control PMV Query

If money was no object, that would be a great idea. Despite all the inception woes, it is working quite well. The controller puzzle arose as a result of some tweaking of the zone runs times, rather than another patch on an already chequered set up. I need to take lots of care with tweaking, as there's now a robot lawn mower on the job, 17 hours-a-day. I don't think the pop-ups would like being nudged by the mower.

Wednesday, March 12th 2014, 10:57pm

Author: PerryNZ

Irritrol Total Control PMV Query

A year or two back, when I installed the irrigation system here, juggling aspects of a 'grew-like-topsy' irrigation reticulation arrangement meant that may aspects were a compromise. One consequence of that was to put one zone/station on the PMV terminal of the controller. That station/zone has 5 rotors, atop a row of fence posts, using a very low water volume. Now I'm doing a few refinements and there's something I can't fathom out from the Irritrol manual, when compared with what I see actuall...

Wednesday, December 14th 2011, 7:23pm

Author: PerryNZ

SVC-100 Start Time Stacking

Well, this is what it looks like, now: Clicking the little boxes to the right shows a slightly larger pic. The woodlot at the back, the apple orchard in front of it, and another to the right (off pic) are all benefiting from more regular, automated watering. As are madam's gardens. I've even managed 6 days away without any problems occurring. Before that, the new (circa 65psi) higher system pressure caused three pipe ruptures. So I programmed the the PMV electronic timer to activate the solenoid...

Thursday, November 24th 2011, 4:54pm

Author: PerryNZ

A Hybrid Monster

Thanks for the added comments. Following your advice, the below-mentioned tactic will mean only DC latching relays will be affected by no water supply. Quoted from "Mitchgo" My question is what event does the 2" ball valve need to be shut off for if you have a master valve? I've ended up with something that can be fairly described as a mish-mash. So be it. I now need to work with what I've got, viz. Pump controller (time switch) SVC x 3 Galcon tap timer x 2 Irritrol controller There is no way th...

Tuesday, November 15th 2011, 1:26am

Author: PerryNZ

SVC-100 Start Time Stacking

Quoted from "mrfixit" OK. I wont be able to give you any more advice on this. I don't know the first thing about your pump and what will happen when it tries to run but you have a shut off valve on the line. Sounds like it might burn up to me. The pump pressurises a tank, so switches on and off, automatically. There is a solenoid valve and a ball valve in the line that connects the tank to the irrigation line. When the solenoid valve opens, water can flow to the field. But if the ball valve is ...

Monday, November 14th 2011, 7:09pm

Author: PerryNZ

SVC-100 Start Time Stacking

Quoted from "mrfixit" You have me a little bit confused here. If you're using the SVCs in the field, what's controlling the master valve? A separate electronic timer in the pump shed. The system is a hybrid. One with a few design flaws. (Wet Boots is not so charitable!) The pump supplies domestic water via a very large pressure tank, with water fed to five households. The pump shed timer simply opens the solenoid valve to the irrigation system. Brief, initial water flow is from the pressure tan...

Sunday, November 13th 2011, 9:22pm

Author: PerryNZ

SVC-100 Start Time Stacking

Right. In most cases, I can factor in a decent break between on and off, by a major re-arrangement of the station/zone sequences. But in one valve, only the (minimum) five minute segment could be allowed in the program 1 end and program 2 start time setting of the SVC-100. As fortune would have it, I've been beavering away at getting this all into sufficient order so that I could go away for five days, without new grass (seeded 3 weeks ago) getting burnt off. The arrangement is unduly complex (f...

Thursday, November 10th 2011, 2:54am

Author: PerryNZ

SVC-100 Start Time Stacking

After reading and re-reading the manual, I'm left unsure if start time stacking works on single station valves? On page 10 on the manual, mention is made of stacking for multiple valves - not one valve. The manual declares that the maximum run time for the SVC-100 is 4 hours. Can I set two start times on a single station SVC, four hours apart, with a run time of four hours, in order to get an aggregate run time of 8 hours? Anyone have any experience with this?

Sunday, August 28th 2011, 11:35pm

Author: PerryNZ

You're Right - T'was Only An Example

The 1 hour figure was for illustrative purposes only. Zone 7 needs to run for whatever duration is the aggregate total time of all the other zones. Dan 2001 micro sprinklers @ 70 lph ea , covering long strips of garden, under big and thirsty trees. By the time a few others are reckoned, about 1000 lph for zone 7, give or take a bit. Those micro sprinklers seem quite tolerant of pressure fluctuations, too. It's looking like running another controller might be the most workable solution. The insta...

Sunday, August 28th 2011, 9:18pm

Author: PerryNZ

Hunter MP's?

AFAIK, already at the top of the range. Evenness of precipitation across the installation may also be a factor. Plus it makes sense to add in the extra zones, now that there's more water than the designer thought would be available.

Sunday, August 28th 2011, 5:08pm

Author: PerryNZ

Oh, Well . . .

I had a system put in by an installer. But the pump delivers more than he anticipated! I think he 'allowed' for more losses and a bigger margin-for-error than proved necessary. That's brought on some interesting consequences. So I have a question about controllers. The installed system uses a Hunter geared sprinklers and a Pro-C controller. As far as I can tell, the controller can't switch more than one station, unless wired in common. To 'make use' of the surplus water capacity, (to keep the pu...

Thursday, June 2nd 2011, 5:01pm

Author: PerryNZ

Hunter MP's?

It was the sprinkler head performance that my question was aimed at. I'm familiar with the supply pressure options of the existing system. The present water use devices are optimum at 2 bar. Or close: a little higher is better than a little lower, generally. Significantly higher pressures give more misting and 'atomization' with concomitant loss to wind drift - impact sprinklers being the worst affected. The same supply is used for five household's domestic supply, so much below two bars can be ...