Carver twice spoke to banned manager Alan Pardew during the game, at half-time and towards the end of the 90 minutes.
Carver said: "It was pretty brief. Two conversations and that was it.
"Other than him not being here for the 3.5 hours, he's been right at the front of it."
At full-time Pardew highlighted a possible penalty when Krul went up for a stoppage-time corner and felt the ball hit Heitinga's arm, only for referee Howard Webb to blow for full-time.
Carver had to keep his composure and tame an angry Krul.
"I certainly counted to 10," Carver added.
"I had a nice, sensible conversation with Howard and he explained his reasons to me and I accepted that.
"He (Webb) said the position he was in he couldn't actually see it hit his arm.
"(But) sometimes when you're not quite sure you think 'let's end the game now'.
"Tim was a bit animated. He wanted to go to see him. I said no, get yourself out, don't go there. It's not worth it."
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