Irwin Zazulia, who earlier this week was named president and chief executive officer of the Hecht Co., will not take over the 20-store chain until July 1.

Zazulia said yesterday that in the meantime he was "not at liberty" to discuss his plans for the Washington-Baltimore chain.

Zazulia, 38, was named president and chief executive officer of the Hecht department store chain by Hecht's owners, May Department Stores Co. Zazulia succeeds Allan J. Bloostein, who was named vice chairman of May last April.

Zazulia also said he couldn't comment on the company's plans to move the downtown Hecht store several blocks to the west of its present location at 7th and F streets NW. The company reportedly is studying a move to the rapidly developing area near 13th and G streets NW, including a possible site in a $200 million development by Oliver Carr above the Metro Center subway station and across the street from Woodward & Lothrop.

Sources had said that Hecht's is losing $1 million a year at its present downtown location.

Zazulia has been a vice president at Hecht's since 1978. His new appointment becomes effective July 1.

Zazulia joined the chain in 1971 as divisional merchandise manager of coats, sportswear, juniors' clothing and intimate apparel. In 1974 he was appointed vice president and general merchandise manager of soft lines, which basically consist of wearing apparel, a Hecht's representative said. In 1976 Zazulia was named executive vice president of merchandising.

Zazulia was divisional merchandise manager for Stern Brothers Department Store in New York before joining Hecht's.