Ethernet based control over a Throughwall AC unit

pochrist

New Member
A little background,

I work for a small Private school as the IT manager, 90% of the Staff, Faculty & Students live on campus (as did my predecessor). Formally when there was problem He was onsite to address it or a 3rd party company was called in to assist. I however live 45mins away on a good day. In an effort to save the school money I have been assuming many of the responsibilities that were intially taken care of by outside vendors. I have been setting up remote access to the Network equipment on the campus and have also deployed a few ethernet based power strips that allow me to login to the campus from home and turn on / off network equipment if they require a reset.

The school typically closes from Christams - New years So I was looking forward to a week off, Unfortunatly On Dec 22 the friday before Xmas week we had a power outage.... At 9 am an email went out from the Headmaster that the school could close at Noon, at 9:30am the power went out.

As we have UPS's installed on all the server equipment I decided to wait as long as I could before shutting down the servers (power problems plague this area). But when I decided shut down the servers the UPS units had already done so. I waited till 2:30pm (in the hopes the power would be restored and I wouldn't have come back till after my vacation)

No luck... I decided to go back to the campus the next day, I called up the local Internet Service Provider to verify that service was restored prior to leaving and found out it had, I logged into the Servers remotely and verified they were up. However I was concerned that the Throughwall AC unit installed in the room was off and did not want to chance the Servers and Phone system overheating and burning out. Luckily I found a campus resident who could verify it was still up.

The goal:

I want to setup an ethernet based outlet for the AC unit so I can monitor and reset it if necessary, I need to do this as Simply and for lack of a better word "cheaply" as possible, hard wirering is not an option.

I've looked at some of the Home Automation sites but want to avoid calling with this simple problem and have a guy try to sell me a full blown system.

Can anyone point me at a few components that would fit my needs, thanks
 
There are a few ethernet controlled 120 VAC plug units out there that can operate as a stand alone.

A little more info is needed. You 'just' need to reset this outlet remotely as all of your monitoring needs are already handled? What would need monitoring if not (temp, 'presence' of AC voltage to the outlet, is the AC unit running (current), etc...)

At what AC voltage and current does your AC equipment operate?

There was a really cheap terminal strip posted here a while ago (by work2play?), but I'm not sure it will handle your needs.

From an IT perspective, there are plenty of larger outlets that can handle up to 20 amps, and I think they even have some monitoring capabilities (Black Box for instance).
 
I really like the Digital Loggers equipment, been using it for years, very reliable:

http://www.digital-loggers.com/lpc.html
 
I have to look up the Model on the AC unit I believe it in the 12,000 btu range, its on a 110/115 VAC connected to a 20 amp line. The web swith looks nice but I'm not sure if the AC unit will draw less then 10 amps, I'll have to research it. A cursory google search indicates that it may draw 9-10.5 amps. If i can't find a unit capable of handeling it I guess I'll have to have it hard wired if I'm desperate.
 
Your contactor would need to be rated the same or greater than the breaker rating for the circuit. Actual equipment load shouldn't be used. The Elk model listed would work for most applications. Plug it in to a switched outlet and you are good to go.
 
I have to look up the Model on the AC unit I believe it in the 12,000 btu range, its on a 110/115 VAC connected to a 20 amp line. The web swith looks nice but I'm not sure if the AC unit will draw less then 10 amps, I'll have to research it. A cursory google search indicates that it may draw 9-10.5 amps. If i can't find a unit capable of handeling it I guess I'll have to have it hard wired if I'm desperate.

Did you read my post above (#4)? :huh:
 
Yes I have to explore this to see what's involved unless l'm mistaken it looks like I'll have to have to hard wording done.
 
My UPS has a temp sensor module (APS UPS) so I can see the room temperature via the we interface for it.  If your UPS is in the same room as the servers then you can go this route.  Otherwise find someother way to get the temperature remotely.
 
Just having the AC on does not guarantee that the room is cooling - what if it has lost its gas - its on and running butnot cooling.
 
Does having AC on mean that it is running or is there a switch between that will need to be turned on (like a consumer AC unit would have)
 
I look after many switchroom and we have A/C in all of them.  We run two in the rooms with control system hardware and servers and monitor temperature as failures do occur where the AC is running but not cooling.
 
Mick
 
I'm trying to bring this server room some semblance of order in the 21st century. The technology in this school has grown faster then could imagine and have very little organization so I'm trying get there a piece at a time. I do plan to install environmental monitoring eventually.
 
ChrisCicc said:
The Insteon ApplianceLinc is rated up to 15 amps. Seems like this could do the job for you. A webcam or energy monitor could monitor the status of the A/C, and if it needed to be power cycled to restart it, you could do so with the ApplianceLinc and any number of software solutions, including CastleOS.
 
http://www.smarthome.com/2456S3/ApplianceLinc-Relay-INSTEON-Plug-in-Appliance-Control-Module-3-pin/p.aspx
Are you saying he can then 'communicate' directly to that Appliance Linc?
 
As far as i can see I can't connect to it directly to an ethernet wire, which means I can't assign and IP address to it (which to me is less control then I need) while we employ a multitude of wireless AP's on the campus I won't rely on them for my primary remote access to the campus.
 
Back
Top