Napa Valley Wine Auction, Napa, Calif., hired SEI Investments as manager of managers for its entire $10 million Napa Valley Health Care Fund, said Sandra Morgen, finance director. Napa Valley Wine Auction is a subsidiary of Napa Valley Vintners Association. Fund officials replaced previous investment manager Morgan Stanley because they wanted more diversification. The funds asset allocation is 70% equity and 30% fixed income. It did not use a consultant.