Many of the larger air handlers have two independent sets of heat strips powered by separate circuits. Typically, one heat strip and the blower (and transformer) are on one circuit and the other heat strip (possibly higher wattage) is on the a second circuit. These "heat strips" are actually coils of high-temp wire (like nichrome) inside the duct held by ceramic insulator standoffs. Here's what one looks like: <http://www.ecomfort.com/Goodman-HKR-03/p26340.html?utm_term=2634026340&var1 =ecomfortusa&var2=adwordsfroogle&var3=1866&keyword=GOOGLEPLA-1866&gclid=CMqd p6yatNECFdYvgQodcjUB3A>
There should also be a high-temp switch on the assembly that cuts power to the element if it gets too hot (which it will if the blower stops). Two-stage thermostats have two heat outputs (w1 and w2) to engage the two sets of heat strips independently, as needed to maintain room temperature. > -----Original Message----- > From: Kaleb C. Striplin via Mercedes > Sent: Sunday, January 08, 2017 9:35 PM > > They have a 5 ton only model listed on the chart and I have a 5 ton unit so I am > guessing that is the one I should have. I was Just wondering about the > difference between what they are calling single and multiple circuit. The kit > listed for 5 ton only says it's multiple circuit so that probably answers my > question. > > Sent from my iPhone > > > On Jan 8, 2017, at 8:27 PM, Max Dillon via Mercedes > <[email protected]> wrote: > > > > I'm not sure, but I think the heat strips are sized according to the airflow the > air handler can provide. Too big, they will either have a short life and burn > out, or start a fire and burn down your house. > > -- > > Max Dillon > > Charleston SC > > '87 300TD > > '95 E300 > > > >> On January 8, 2017 8:46:07 PM EST, "Kaleb C. Striplin via Mercedes" > <[email protected]> wrote: > >> In looking at the sticker on the air handler there is a list of a > >> bunch > >> > >> of different heater kits that can be installed and they were supposed > >> to mark which one was installed. Well nothing is marked. I am > >> suspecting > >> > >> maybe the kit that is installed is possibly too big for the circuit. > >> I > >> > >> need to pull the cover sometime and see if I can tell which heater is > >> installed. Anyway it is on a 60 amp breaker and I have 6 gauge wire > >> running to the unit (2 60 amp circuits actually, one goes to the air > >> handler other to the heater kit). I am looking at the chart and > >> wanting to make sure I am reading correctly what the biggest heater I > >> can have for the circuit. There are different heater types based on > >> if it is a single or multiple circuit. Since I have 2 60 amp > >> circuits going to the unit, one for air handler and one for aux > >> heater, is this considered a multiple circuit setup, or single since > >> 2 circuit goes to the actual heater? > >> > >> > >> There is also a spec for circuit amps, min circuit ampacity, and > >> maximum circuit protection. For example one heater kit listed on the > >> chart is a single circuit model, KW is listed at 7.2/9.6 which is 2 > >> elements at > >> 4.8 > >> each, circuit amps is listed at 34.6/40, min ampacity 49/56, max amp > >> circuit protection 50/60. So this is just a random model I selected > >> from the list and am I reading it correctly that this kit basically > >> needs a 60 amp circuit to run it? > >> > >> I am just trying to get an idea on if I am reading the spec chart > >> correct then will figure out which heater is actually installed so on > >> and so forth > >> > >> > >> > >> > >>> On 1/8/2017 3:37 PM, Max Dillon via Mercedes wrote: > >>> I don't know how you conclude that, it sounds like when your system > >> goes into defrost, the heat strips are turned on, and the breaker for > >> those trips off. Outside unit then shuts off because the heat strips > >> are off, so defrost mode won't work. Solve the breaker trip issue - > >> heater strips over sized? > >> > >> > >> _______________________________________ > >> http://www.okiebenz.com > >> > >> To search list archives http://www.okiebenz.com/archive/ > >> > >> To Unsubscribe or change delivery options go to: > >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
