Josh Norris scored, and Daccord made 25 saves for the Senators (10-20-2), who were coming off a 4-3 win against the Toronto Maple Leafs on Sunday and are 1-3-1 in their past five games.
"We were outstanding," Ottawa coach D.J. Smith said. "To a man, how hard we played, take the 3-on-3 aside, I don't know how much harder we can play on a back-to-back. We made plays, we were dangerous, we defended when we had to. We just didn't come out on the right side of it, but that's a heck of an effort."
Jayce Hawryluk scored his first of the season to give Vancouver a 1-0 lead at 10:14 of the first period, jamming in a rebound in front of the net.
"It's huge. We know we needed these two points big tonight," Hawryluk said. "Obviously, it wasn't the way we drew it up, but we came out on top and that's all that matters."