Home » Public Forums » GMCnet » [GMCnet] Iota ITS-50R Transfer Switch
| [GMCnet] Iota ITS-50R Transfer Switch [message #173629] |
Sun, 17 June 2012 08:55  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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G'day,
When I was back in the USA in February I discovered that for some reason the
Iota ITS-50R automatic transfer switch installed two years ago wasn't
transferring power over one of the relays.
The circuits for the rear A/C and water heater were powered but the front
A/C and the wall plugs were dead.
I am heading back in two weeks to get Double Trouble ready for the MMT-2012
and figgered I'd order a replacement in case it wasn't fixable.
I went to the Iota website and they're no longer listed. I did some more
research and found out according to one RV parts seller Iota discontinued
them. Further research showed that a lot of people on other RV forums were
discussing problems they had with theirs which would explain why they
discontinued them.
Bottom line I'm going to replace it and thought I'd ask if any one has
installed an ATS what brand it was, how long has it been installed, and if
they are happy with it. I found several other manufacturers and I don't want
to buy another piece of junk!
Regards,
Rob M.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Iota ITS-50R Transfer Switch [message #173633 is a reply to message #173629] |
Sun, 17 June 2012 09:32  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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I bet it's the "don't use it ---loose it" theory. If it's a Mechanical system, spray some Caig Deoxit D5 followed by Caig Fader Lube in there. The Fader Lube leaves behind more lube than the D5 which is better at cleaning. The 'spraycan mechanic' theory is often frowned upon, but if unit's not available to replace this may fix it for quite some time. Good stuff has got me out of many a bind.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Iota ITS-50R Transfer Switch [message #173640 is a reply to message #173629] |
Sun, 17 June 2012 11:00 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Rob,
The first thing to do is open the cover over the relays and watch what
happens when power is applied by the source which causes switching. If the
relay armatures move, you should be able to repair it by cleaning the
contacts.
Use the recommended contact cleaner, or another such as CRC 2-26. If that
doesn't work, the next step would be to mechanically clean the contacts:
Use a quad-folded strip of paper to "polish" the contacts while holding
them closed lightly. If that doesn't work, you may want to use fine
wet/dry sandpaper in place of the paper -- clean the contacts with cleaner
and the paper strip after that step.
If only one of the relay armatures moves, it's likely that replacing the
relay will fix it. It's probably a Potter & Brumfield DPDT 120 VDC relay;
I don't remember the number. It may be hard to find -- unless you contact
me; I THINK I've got some in an old control panel.
If neither relay armature moves, it's probably the control board and beyond
your repair capability.
There are Iota and other transfer switches on eBay, but IMHO too expensive.
Too bad you have a 50A system -- that's a lot more complicated to switch
than a 30A system which requires only one relay per switched source, like
this:
http://www.gmcmhphotos.com/photos/automatic-120-vac-power-source-selection/p8542.html
HEY! There's the part number! :-)
Ken H.
On Sun, Jun 17, 2012 at 9:55 AM, Robert Mueller wrote:
> G'day,
>
> When I was back in the USA in February I discovered that for some reason
> the
> Iota ITS-50R automatic transfer switch installed two years ago wasn't
> transferring power over one of the relays.
>
> The circuits for the rear A/C and water heater were powered but the front
> A/C and the wall plugs were dead.
>
> I am heading back in two weeks to get Double Trouble ready for the MMT-2012
> and figgered I'd order a replacement in case it wasn't fixable.
>
> I went to the Iota website and they're no longer listed. I did some more
> research and found out according to one RV parts seller Iota discontinued
> them. Further research showed that a lot of people on other RV forums were
> discussing problems they had with theirs which would explain why they
> discontinued them.
>
> Bottom line I'm going to replace it and thought I'd ask if any one has
> installed an ATS what brand it was, how long has it been installed, and if
> they are happy with it. I found several other manufacturers and I don't
> want
> to buy another piece of junk!
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Iota ITS-50R Transfer Switch [message #173656 is a reply to message #173629] |
Sun, 17 June 2012 13:53 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Hi, Rob.
If you are interested, I have a brand new, never installed
ITS-50R transfer switch available. I bought it during my
early months of GMC ownership, but I have decided I most
likely will follow the KISS (Keep It Simple, Sam) policy
and just keep things stock.
If your one circuit is operating at all, as you said, that
means that the Time Delay Control Module is receiving voltage
on Generator Hot Line #1 and providing 110V DC to operate the
individual relays.
HOT and NEUTRAL switching is handled by separate relays and
both must operate correctly for switching to occur.
Can you open the cover of the switch box to access the
terminals (when you return to the US)? It is certain that
both relays are being activated and switching, at least
for Line #1. You need BOTH the HOT and NEUTRAL relays to
function just to get one side (Line #1) functioning.
Your next step is to determine why Line #2 that comes from
the genset is not functioning. The first step is to check
voltage (with genset running) at both generator leads on
the HOT RELAY. Check voltage at the RED and BLACK leads on
the large terminal block area labeled GENERATOR using the
WHITE lead in the same area as the referenc. Both terminals
should show ~120 Volts.
If it isn't there, you need to correct that (with ALL power
OFF, of course).
If the voltage is there, then check the RED and BLACK wires
at the terminal block in the CONTROL PANEL area, again with
the white wire in that area as the reference.
If the voltage is NOT there, the HOT relay is defective.
If the voltage IS there and you still have no operation on
the second circuit, the NEUTRAL relay is defective.
Once you have isolated any defective relay(s) you should be
able to remove the assembly from the plastic box by drilling
out the four rivets holding it all together. At that point,
you need to find replacement relay(s) that will handle the
current and fit in the space. I estimate that the Double Pole
Double Throw (DPDT) relays capable of 30 Amps would be quite
satisfactory. Larger current capacity would, of course, be
preferable for long life and reliability. Reassembly might
be a bit of a problem, but I suspect new pop rivets would be
a perfect solution. With the expertise available in this
group, it should not be insurmountable.
Any reported unreliability of the IOTA ITS-50R would originate
in either the electronic Time Delay Control Module or poor
quality transfer relays. It's a pretty simple device, otherwise.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
*[ ]~~~[][ ][|\
*--OO--[]---O-*
> From: robmueller@iinet.net.au
> To: gmclist@temp.gmcnet.org
> Date: Sun, 17 Jun 2012 23:55:40 +1000
> Subject: [GMCnet] Iota ITS-50R Transfer Switch
>
> G'day,
>
> When I was back in the USA in February I discovered that for some reason the
> Iota ITS-50R automatic transfer switch installed two years ago wasn't
> transferring power over one of the relays.
>
> The circuits for the rear A/C and water heater were powered but the front
> A/C and the wall plugs were dead.
>
> I am heading back in two weeks to get Double Trouble ready for the MMT-2012
> and figgered I'd order a replacement in case it wasn't fixable.
>
> I went to the Iota website and they're no longer listed. I did some more
> research and found out according to one RV parts seller Iota discontinued
> them. Further research showed that a lot of people on other RV forums were
> discussing problems they had with theirs which would explain why they
> discontinued them.
>
> Bottom line I'm going to replace it and thought I'd ask if any one has
> installed an ATS what brand it was, how long has it been installed, and if
> they are happy with it. I found several other manufacturers and I don't want
> to buy another piece of junk!
>
> Regards,
> Rob M.
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| Re: [GMCnet] Iota ITS-50R Transfer Switch [message #173702 is a reply to message #173640] |
Sun, 17 June 2012 23:42 |
Adrien G.
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma: 1
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Senior Member |
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Ken,
>>>>>> It's probably a Potter & Brumfield DPDT 120 VDC relay; <<<<
What am I missing?
I understand the DPDT 120v part of the relay, but why DC when the current switching is AC. Is a rectifier also used as a delay?
In my younger years when working on RV, I don't recall switching relays being other then AC type relays.
The key always is understanding.
Adrien & Jenny Genesoto
75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild
Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
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| Re: [GMCnet] Iota ITS-50R Transfer Switch [message #173704 is a reply to message #173702] |
Mon, 18 June 2012 00:17 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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The simple answer is that the switching relays are DC because it's MUCH
easier to introduce activation/deactivation delays with them. If you saw
ac switching relays, they probably were not in an automatic circuit.
Ken H.
On Mon, Jun 18, 2012 at 12:42 AM, Adrien Genesoto wrote:
>
>
> Ken,
>
> >>>>>> It's probably a Potter & Brumfield DPDT 120 VDC relay; <<<<
>
> What am I missing?
>
> I understand the DPDT 120v part of the relay, but why DC when the current
> switching is AC. Is a rectifier also used as a delay?
>
> In my younger years when working on RV, I don't recall switching relays
> being other then AC type relays.
>
>
> The key always is understanding.
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Iota ITS-50R Transfer Switch [message #173735 is a reply to message #173730] |
Mon, 18 June 2012 09:35 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Rick,
Duly noted!
I may be electrically challenged, however, not so challenged not to check
the C/B's. Having said that I have missed more obvious stuff when
troubleshooting other problems! ;-)
BTW IIRC you've got one of these in Jaws?
I DO appreciate the help.
Regards,
Rob M.
-----Original Message-----
From: Richard Denney
On Sun, Jun 17, 2012 at 9:55 AM, Robert Mueller <robmueller@iinet.net.au>
wrote:
> The circuits for the rear A/C and water heater were powered but the front
> A/C and the wall plugs were dead.
>
First thing to check: Are the circuit breakers for those circuits tripped?
Second thing: Tighten down the terminals on both the circuit breakers
and in the transfer switch.
These are the most common reasons for loss of power at an outlet in a
GMC. It may not be the transfer switch at all.
Then, make sure no critter has taken up residence in the relay mechanism.
Those relays are pretty simple and reliable--moreso than the screw
terminals in a high-vibration environment.
Rick "eliminating the easy obvious stuff first" Denney
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Iota ITS-50R Transfer Switch [message #173864 is a reply to message #173738] |
Mon, 18 June 2012 22:59 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Rick,
Got the following from Iota.
I love "Good luck to you."
Regards,
Rob M.
________________________________________
From: Mariette Kehm [mailto:mkehm@iotaengineering.com]
Sent: Tuesday, 19 June 2012 1:22 AM
To: Robert Mueller
Subject: RE: Iota ITS-50R
Good morning Robert,
Yes, Iota discontinued the Transfer Switch line several years ago. We do not have a replacement. One of our main distributors,
Master Techs, offers another brand. I'm not sure if they ship international, but it is worth a try. Their contact info is listed
below. Good luck to you.
Master Techs
1-800-848-0558
FAX 1-269-789-1145
www.mastertech-inc.com
Have a great day.
Mariette Kehm
Iota Engineering
P: 800-866-4682 ext. 105
F: 520-741-2873
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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