  The Narrow Line Seyfert 1 Galaxy IRAS17020+4544 is one of the few AGN where a
galaxy-scale energy-conserving outflow was revealed. This paper reports on
NOEMA observations addressed to constrain the spatial scale of the CO emission
in outflow. The molecular outflowing gas is resolved in five components tracing
approaching and receding gas, all located at a distance of 2-3~kpc on the West
and East side of the active nucleus. This high velocity gas (up to v_out=~1900
km/s) is not coincident with the rotation pattern of the CO gas in the host
galaxy disk. The estimated mass outflow rate shows that with a global mass
output of $\dot{M}_{H_2}$=~139$\pm$20$~M_\odot$~yr$^{-1}$, this powerful
galaxy-scale outflow is consistent with the wind conserving its energy, and
with a momentum rate boost of a factor of ~30 compared to the momentum rate of
the nuclear X-ray wind. Preliminary results from ancillary X-ray (Chandra) and
radio images (e-MERLIN) are reported. While the nature of the radio source is
not conclusive, the Chandra image may tentatively trace extended emission, as
expected by an expanding bubble of hot X-ray gas. The outcome of the NOEMA
analysis and of past and ongoing publications dedicated to the description of
the outflow multi-band phenomenology in IRAS17020+4544 concur to provide
compelling reasons to postulate that an outflow shocking with the galaxy
interstellar medium is driving the multi-phase wind in this peculiar AGN.
