Anti-Ice Control

with heat

By using an evaporator pressure regulator, or compressor cut-out and cut-in settings, to ensure that the evaporating temperature never goes below freezing.

Usually by a thermostat and or timer (defrost cycle) depending on what type of unit (heat pump) and how the manufacture wants to control it.

If this is a package unit or split AC system and your evaporator is icing over, you have more problems than a defrost cycle

open the registers!

GA Yup, but that's to simple of a solution. They might change the air filter that been there for the last 6 years too

I think I'll pass on this one.

Same here:

"Note that the defrost timer motor is powered through the contactor, so it will only run when the compressor runs. The outdoor coil thermostat has its sensing bulb on the outdoor coil. The defrost clock closes its contact for about 10 seconds every set defrost period. As an example, let’s say this is every 90 minutes. The outdoor coil thermostat is set for 32°F and closes on temperature fall. If during the 10 second period the outdoor thermostat is open, a defrost will not be initiated, and the timer must go around another 90 minute cycle before trying again. If the outdoor thermostat is closed, the defrost relay is energized, closing the holding contact and initiating defrost.

To terminate defrost, the coil sensor senses the coil temperature rise and its normally closed contact opens, de-energizing the defrost relay and terminating the defrost cycle. As long as ice is on the coil during defrost, its temperature will be near 32°F. After the ice is melted, the coil temperature will rise rapidly."

http://www.industrialcontrolsonline.com/training/online/heat-pumps-part-3-thermostat-defrost-controls

That's all good info. for a heat pump, but the OP still hasn't said what type of system their in question about

did he mention coil tonnage or cfm info???

Well- the system is a townhouse central heating / cooling system - uses hot water tank for heating.

Hi velocity system.

There are several methods, as you can see from prior posts. We can't see your system from here, and you have given absolutely no details. So your question makes no sense.

Hi-Velocity System .

Model HV-100/101

Standard Wiring.

offer Tornado a jug of Ripple and he'll drop by and BTU"s will be be zipping all over in a jiffy

Hi-Velocity System .

Model HV-100/101

Standard Wiring.

See page 35 of the installation manual - standard wiring.

How the anti-ice control works ??? (FREEZE STAT).

its just a thermostat........works on temperature. if the coil see's 32 degrees it hss contacts the activate and the machine shuts off, stopping the freezing process

Do you mean it is a another thermostat - which stops the compressor when the temperature drops to below 32 degrees ?

If so - where that thermostat is located ??

it's usually fixed at that temp or close to it, it isn't usually adjustable . its considered a "safety control", NOT an operational control for the user

Well - where that thermostat should be located ??

your annoying game just ran out...........insert quarter to play again

Among the possibilities are these:

1. A thermostat with switching mechanism (and possible adjusting dial) located in the compressor compartment or control panel, with a capillary tube to a sensing bulb embedded in the evaporator.

2. A so-called "Klixon" thermostat mounted to a U-bend at one end of the evaporator coil, with wires going to the compressor compartment or control panel.

3. Could be others.

Gotta do better than that!

That might help, but the image isn't large and clear enough. I don't know the secret (if there is one) to posting good images that can be panned/zoomed.

Well Tornado.... You can use magnifying glasses if you wish / need.

Also the image is there, in a large size , in the installation manual of the system page 35.

Hi-Velocity Systems

Model HV-100 / 101

Available at the internet for downloading.

Thanks for help.

The manual has an error: "site glass" should instead be "sight glass".

cite

Who is that hiding Anonymous #2 ??

Must be lyn !!!

Who that placed "off topic" vote ??

Must be gain the hiding lyn !!

As far as being voted OT, no sweat off my balls back, I'm not here for tally counts of GA's Anon #1, AKA peterpipper. How many times do you have to be banned from this forum before you get the hint??

Do everyone a favor and just go away

I'm done! If Anon # 1 doesn't know what he/she are doing, they should be not be f___ing with it! The cost could be more than just monetary, it can be DEADLY!!!

The only 'Hero's' in this thread will be the EMT's trying to plug the holes in your body, while in route to the ER!

Good Bye and Good Luck

I did foresee it... There were enough clues

Yup, that's why I checked out But why the fixation on Lyn?

Lyn hasn't even checked in on this thread yet! Anon #1 has to be Legolaz. Oops, Peterpipper!

Hopefully, the Administrators can put a filter in to block trolls.

Why the fixation on Lyn...

I don't know... Maybe because lyn attracts pests.

I've heard thru the grapevine that Lyn is packing one these on each hip and just waiting for their back to be turned

It also works on trolls too