View Full Version : Infinty 58MVC w/ Infinty control operation.
10-27-2008, 02:18 PM
Hi. This is my first post. Thanks very much for reading.
I've recently had a Carrier 58MVC with Infinity Control installed. It seems to be working well, but I have a few questions.
Anyway, here are my questions.
1. Should there ever be any sort of banging or clanking sound in the ducts? I've occasionally heard some random banging (like a shoe in the ductwork) but as with all intermittent problems it didn't happen when the contractor came to check it out. What might cause this?
2. I'm looking for info beyond the scope of the homeowners manuals I have. ie. How does the thermostat determine what fan speed should be used? Can someone direct me to some info on the cycle profile the system follows and what should be considered normal?
3. The thermostat has been installed on a wall very near to the back of our fridge. It consistently reads 2 degrees warmer than the actual temperature in the rest of the house. I've set the offset accordingly (actual temp -2), will this solve the problem or should I move the unit?
4. Can I get a wireless outdoor temperature sensor that communicates with the thermostat? I don't have a heat pump, but would like to have to outdoor temp available. All the reading I've done mentions the OAT on an exterior unit, is it possible to get an OAT without the heat pump attached?
Thanks very much in advance. FYI, I live in Vancouver, Canada.
10-27-2008, 11:24 PM
Hobbs..dude...this is not a do it yourself site. I am a humble homeowner like yourself with some HVAC training. As such, I offer the following in advance of your contractor's visit (which you should request).
1. Banging? Call your contractor. You may have some expansion/contraction sounds resulting from warm air going through cold ducts but this should not be loud. You paid good money for this furnace. I would call him if you are unsure. He/she is obligated to help you with this.
2. Fan speed? The fan speed and staging when the furnace is in operation is based on a patented algorithm exclusive to Carrier. There are many variables that can be adjusted...let your contractor do this. If you don't, you can likely eff things up. As a homeowner, you CAN adjust the continuous fan speed to low, med, high or auto. This is the very top button on the right side of your infinity control. Low, med, high-- would run the blower continuously at the selected speed unless the furnace is running--at which time the furnace/infinity control would determine the fan speed and furnace stage based on the heating demand of your house. Auto would NOT allow the blower to operate at any other time than when you have a heating or cooling demand. There are other reasons that your fan would run if you have certain optional equipment, but I won't go into that. (humidifier, energy or heat recovery ventilator, or condensing unit for dehum. These options would have to be enabled by your contractor when he installed your system IF you have the optional equipment)
3. Thermostat location? I would talk to your contractor about this. No other way to answer this question. I find it strange that he would locate it near a heat producing device. The literature (and common sense) would dictate otherwise. I wouldn't locate it there, for certain.
4. The infinity control is a 4-wire hookup. ABCD. Your contractor can use extra wires from your INFINITY control that aren't ABCD to sense outdoor temperature, yes. Generally, this sensor is located INSIDE your outdoor condensing unit or outdoor heat pump utilizing the aforementioned extra wires that are not "ABCD" designated. The wires run from your infinity control, to your furnace circuit board to the sensor (which can be located in several different places). If you don't have an outdoor heat pump or condensing unit, the sensor set-up is far from straight forward. Your contractor would have to drill a hole through the wall of your house to sense the outdoor temperature via a wire running from your MVC furnace circuit board leading to the outdoor sensor. This would take some doing and it is probably more trouble than it is worth. I wouldn't do it myself in any case. My advice: have a pro do it. Other than convenience, I don't see the utility in having the temperature reading on the Infinity control unless you have a humidifier. This temperature reading could then be used to automatically adjust the humidity according to the outdoor temp IF you have a humidifier. Even without it, you can easily adjust the humidity on the infinity control if you have a humidifier if your control is so programmed. Call your contractor, do not address this issue yourself.
Before I had my infinity control, I bought a wireless thermometer for about 25 bucks and I mounted the base station right next to my thermostat and I mounted the receiver (sensor) outside. Nice setup. And a lot less trouble than what you are proposing. Call your contractor if you have other questions about the operation of your infinity control.:D
10-28-2008, 01:21 AM
hvacsaavyhmownr, thanks for your reply.
Yep, I know I'm in over my head here, not looking to waste anyone's time. I've got some background and a degree, figured I'd see see if I could hold my own. Unfortunately my contractor has made several errors, my confidence in his knowledge with the 58MVC is low.
Regarding the banging, it sounds like a solenoid snapping in and out, not expansion or contraction. Maybe I'll contact Carrier directly......and if I can't get a wireless OAT for the Infinity stat I'll definitely find another solution, no need to run anything more outside.
Thanks again for your reply, much appreciated.
10-28-2008, 06:02 AM
I have the same furnace as you do nice set-up !!! As for the placement of the controller, I would check to see if in fact the location is effecting the controller before you have it moved by placing another temp reading device next to the controller and compare readings. As for the Noise can't say one way or another you have to pin point the sound when it is happening and then have the service tech out to solve the problem. As for the ODT your installer should have installed a OD temp sensor and placed it in the same area as your OD AC and should see the OD temps on your controller. I don't know how you have your controller set-up to run but what I have is the fan running on low continuiously and stat set to 68*when we are home and set back to 64* at night and heat comes on at 4:30 so I basically set it and forget it unless it happens to get so frigid like -10 I kick it up a notch. Also by running the fan on low helps to keep the home more evenly heated eliminating the hot and cold spots thru out the home. You have to remember also once the furnace has been running for several months it learns how you heat your home in a sense based on the stat setting and OD temps.
10-28-2008, 09:58 AM
Having the outdoor temperature on the Infinity control is nice. If I am not mistaken, the infinity control comes with the outdoor air sensor. I had to "offset" the outdoor temperature setting by -5 degrees because inside my outdoor heat pump, it gets warm in the sun and the temperature is off by that much.
Like you, I am very inquisitive and like male technology-gadget stuff..if you feel comfortable calling Carrier, do so. But I am sure they will call your dealer to query him if you do.
Here is the site to get technical literature. Sometimes, links don't work on this site, for some reason. I will type it but you may have to copy and paste it into your browser. If your dealer threw away your sensor, you can order another one over the net on some sites. :D
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