  We present the first results of a pilot program to conduct an Atacama Large
Millimeter/submillimeter Array (ALMA) Band 6 (211-275 GHz) spectral line study
of young stellar objects (YSO) that are undergoing rapid accretion episodes,
i.e. FU Ori objects (FUors). Here, we report on molecular emission line
observations of the FUor system, V883 Ori. In order to image the FUor object
with full coverage from ~0.5 arcsec to the map size of ~30 arcsec, i.e. from
disc to outflow scales, we combine the ALMA main array (the 12-m array) with
the Atacama Compact Array (7-m array) and the total power (TP) array. We detect
HCN, HCO$^{+}$, CH$_{3}$OH, SO, DCN, and H$_{2}$CO emissions with most of these
lines displaying complex kinematics. From PV diagrams, the detected molecules
HCN, HCO$^{+}$, CH$_{3}$OH, DCN, SO, and H$_{2}$CO probe a Keplerian rotating
disc in a direction perpendicular to the large-scale outflow detected
previously with the $^{12}$CO and $^{13}$CO lines. Additionally, HCN and
HCO$^{+}$ reveal kinematic signatures of infall motion. The north outflow is
seen in HCO$^{+}$, H$_{2}$CO, and SO emissions. Interestingly, HCO$^{+}$
emission reveals a pronounced inner depression or "hole" with a size comparable
to the radial extension estimated for the CH$_{3}$OH and 230 GHz continuum. The
inner depression in the integrated HCO$^{+}$ intensity distribution of V883 Ori
is most likely the result of optical depth effects, wherein the optically thick
nature of the HCO$^{+}$ and continuum emission towards the innermost parts of
V883 Ori can result in a continuum subtraction artifact in the final HCO$^{+}$
flux level.
