Bunn signed for Norwich last week from Blackburn Rovers.
"Without a doubt he's one of the best coaches around. I'm really pleased he's managed to get in the England set-up and I hope he'll do well here as well," he said. "He was a great 'keeper and he had to retire through his knee injury. He's made me really welcome, settled me in and the things he does out there can only make us better as 'keepers.
"He started from the lower leagues and built his way up and wherever he's gone he's done really well. I've worked with some great keepers. Paul Robinson was a great keeper as well and I had another great goalkeeping coach in Bobby Mimms.
"It will be great to work with Watto again. He works the keepers really hard, so I'm looking forward to it."