So this is a key craft, qrc, quick response, controller equipped, evaporator coil. It's essentially a dumbed-down beacon system it. It does not have any communication with the equipment on the roof. So you've just got an evaporator with a electronic expansion valve it's and sensors.

It is capable of doing smart defrost that, if I began, has no interconnection to the root of so it's essentially a beacon or but just not all the components of a beacon system. It runs off of 208 single-phase. There is no, inter connecting heater wires from a defrost clock on the roof, because the defrost block is built into the board, so you just run 208 single-phase over there and in the electrical section, there's a low voltage transformer that steps the voltage down for the circuit Board and the circuit board does all the work it has the relays for the defrost and everything on it. So I am just doing a start-up on this.

We put the equipment in yesterday, just the evaporator and say existing retrofit installations. We worked with what we had, but I'm just making sure everything's working the box is down to Tim little things like our suction temperature sensor needs to the fourth tape around it and then I'm going to test the defrost make sure everything's working. There was some ice on the evaporator there's a return air temp that should actually be that's good, got a drain line meter on it things looking good so far. This system has a corral electronic expansion valve and they do not utilize a liquid light.

Solenoid valve the use the expansion valve as the one I saw, and then yeah there's really not much more just got a suction pressure. Transducer that converts the pressure to a digital signal runs with a certain port. Currently negative one degrees and it's we're gon na do - is actually force. The defrosted contestant Eve boss hold the horse across, but man it's going into pump and then, while it's that pump down, it's gon na run the fans for a minute utilize, any warmth.

Out of the air and then it'll turn the heaters on so this unit comes with. I throw it into defrost cycle test the heaters. It comes with a pretty cool manual. If you don't have the manual right on the outside of the panel right there, it tells you what everything means to so we're gon na go through this guy program.

Review. A through e is gon na, be error. Electric defrost so we're on electric select the refrigerant type 404, the Box temp negative 10. This is a walk-in freezer.

The super heat running at 7 degrees. The SLA is whether or not the board is a slave, so you can do multi evap. This is not demand. Defrost we have it turned off.

Dfm is the number of defrost per day, so that's 4 D FF as defrost fail-safe time. So it's a 30 minute. Defrost DFT is defrost termination temperature. So that's the max temp it'll.

Let it get to 60 degrees. Dfs is delay. Start time we don't don't worry about that, but you could essentially kind of predict the defrost. If you don't power down the coil, we can say we don't want it to start until 2 hours.

From this point, so, therefore, you can kind of do the math and figure out when the defrost is going to be. Al H is alarm. High temperature alarm, low temperature. We don't have an alarm contact hooked up to this.

A LT is the alarm time before the alarm sounds it's not a sound before it triggers the contacts Fahrenheit or Celsius, where I'm Fahrenheit and then F and v is a stir cycle fans. We have that off so yeah. It's really not anything complicated, there's, certainly, systems that I find to work a little bit more efficiently. I'm not a fan of using the smart defrost with this controller, because I've run into a lot of problems, for instance, when I got here this morning, when we got done installing it.

Yesterday we left the smart defrost on and I came in today there was ice tub now granted I through a defrost and defrosted itself, but with this particular style, I'm gon na leave it in a normal defrost mode. So it's just going to do four defrost a day and that's pretty much it we're gon na go over and test the defrost heaters now typical electrical section, the stuff I'm looking for to make sure we didn't leave stuff. So a typical electrical section in your control transformers back there, you have to tap it for the right voltage. Your heaters are all in the coil, but if you notice, you know you don't have all the inner connecting wires.

We actually ran two extra wires for later. For a communication setup we're gon na run a twist timer, basically that powers down the coil when they open the doors so um but yeah. You know you don't have anything hooked up to your extra number for the board. Does all the math for you other than that? It's nothing too fancy it's just a normal coil.

They just integrated that smart defrost into it. So we're all good to go. They give you a little window to so you can see up in there yeah everything's. Looking good so the Q RC controller, like I said, there's no inter communication.

So all that we're running is 208 volt single-phase down to the coil. There's no X terminal, there's no heater wire, there's, not even a defrost clock installed than this. It's just a contactor yeah and that's pretty much it so nothing fancy, I'm not gon na say they don't work, I'm just not up my personal preference, I'm not a fan. You know up until recently.

I wasn't a fan of smart defrost systems, especially on this one. The qrc, I have nothing but problems when you leave it in smart, defrost or adaptive defrost, and basically, what that is. Is it uses the sensors to calculate whether or not they need to do a defrost and it skips D for us? Okay, but until recently, when I found that key to therm controller, the key to therm system, I'm trying to sell one right now so they're a great great system. I really like them.

I was a little frustrated like I had made in one of my videos before with the display on the key to therm control, but once I was able to log into that system, it blew my mind. I am much a much bigger fan of the key to therm smart defrost systems. So this is the heat crap qrc. You know it is what it is.

I don't supply this equipment. The customer supplies that I just installed it for them and yeah. That's pretty much. It all right, so this was just a little review of the heat craft qrc and that stands for quick response controller.

Essentially it's an off-the-shelf item. You can purchase from your wholesaler. It comes pre-installed. I believe that if you install a qrc system, I believe they get an extended warranty on some components in the system too.

I think, but you know like I said I didn't, sell this equipment to the customer. They purchase it themselves and then just have me install it, so I really have nothing to do with that, but I mean it's a decent system. It honestly was my first introduction. I've installed probably 10 or 12 of these evaporators, and it was my my first introduction into the smart defrosting evaporators.

I do have a lot of problems with the smart defrost function when it's setup on a walk-in freezer with the heat craft one. I tend to see a lot of freeze ups that cause nuisance service calls, but you know it is what it is. You know to each their own. Some people like this brand versus the other.

I kind of explain to that. This is kind of a dumb down beacon system. It's it's essentially the beacon to controller, but it just doesn't have any inner connection with the roof with the equipment, so you're not running low voltage up to the condensing unit, or anything like that. This one, essentially just you know, opens the expansion valve and the condensing unit turns on and off.

If you had the low pressure control, so you know nothing too crazy. I really want to say thanks a lot for taking the time to watch this video. You know check out some of the other channels. I recommend they've got some good content to some of these guys much better than I so you know.

That's it see you guys on the next one: okay.