Do your bees in your brood box have plenty of honey stores on the outer edges of your brood frames? Also, are the outside two frames, in your brood box loaded in honey? If so, it is my opinion that you can harvest your 4 frames if you wish. Are you in a flow in your area? A dearth? If in a dearth I would place the extracted combs back into the super using the checkerboard method, also adding a robbing screen, feeding your bees sugar syrup. You should be ok and the bees will soon fill the extracted combs with syrup. However, I would not extract any more from this hive after this extraction because you will only have sugar syrup honey , not real honey. Now, if you are in a flow, extract, feed nothing, let the bees work the nectar flow and refill with real honey. Affording you the opportunity to extract more at a later date. Of course it?s getting late and you will more than likely have to feed this fall, depending on your local area and fall flow. Best of luck to you .
Phillip