Are you able to check heart rate from the new series 2 iwatch on am Iphone if the Iphone is not connected to watch but the watch is connected to wifi?

Hi

Heart rate data is still shared to the Health app on the paired iPhone if your watch is not connected via Bluetooth, but is instead connected via Wi-Fi.

However, it is not presently possible, via the built-in apps, to check your current heart rate via your iPhone. You would instead check that using the watch.

More information:

Your heart rate. What it means, and where on Apple Watch you’ll find it.