Hello. It's me again. I have a question about the blower cfm of our upstairs system.
Our upstairs system is a 2012 Amana Distinctions (Goodman, of course) SSX14 2 ton A/C unit matched up with a 2012 Lennox SL280v gas furnace. The A/C was installed back in early April and the furnace was installed last July. The upstairs is 1400 sq. ft. I am wondering what the cfm is suppose to be in cool mode. I know it's kinda too late to be talking about the A/C unit when A/C season for us is over, well whatever. The system is running in about 883 cfms and sometimes the unit short cycles. If the A/C has been on for 7 1/2 minutes, the blower speed will increase to about 1005 cfm. This is what the tech told us during our yearly tune-up. The evaporator coil is a CAPF3636A6 which is a 3 ton.
The blower ramping option is set to the option A (factory setting) where it would run at a very low speed (50%) when the system starts up and after 30 seconds on running on this speed the blower will ramp up to 82% cfm. If the cooling demand is not met within 7 minutes then the blower will ramp up to 100% of the cfm setting. When the cooling demand is met the blower will ramp back down to 50% for about 30 seconds then ramp down to off. I got this information from the specifications/installer's manual on Lennox's website. This is also what the tech told me.
So how much cfms should a 2 ton system have? Is this indoor coil and A/C unit the proper match up? Sorry about the long post. Thanks in advance.