Under V1 (MCG) table in Performance Inflight section says (Classic): For A/C OFF increase V1 (MCG) by 2 knots.
So, if the DDPG requires you to adjust V1 (MCG) for A/C OFF, you just increase the V1 (MCG) by 2 knots and then see if it requires raising your actual V1 (most probably not).