Page 19 of the IAQ product data manual shows tests for the different system parts. Several of the tests (1,3 and 4) will test different stages. When selecting a multiple stage options, how long is the system in each stage? For example, test 4 option 1, test is the Emergency Heat test for Aux heat stage 1. Option 2 is for Aux Heat stage 1 and 2. If I select option 2, how long will stage 1 fire before it goes to stage 2?