1 INTRODUCTION

2 OBSERVATIONS
2.1 NH3 and H2O maser observations
2.2 Data reduction

3 RESULTS
3.1 Spatial distribution of NH3 emission
3.2 Linewidth correlations
3.3 Deriving physical properties from NH3 lines
3.4 Molecular gas properties
3.5 H2O maser detection

4 DISCUSSION
4.1 Velocity components in W33 complex
4.2 Star formation feedback traced by gas temperature
4.3 Comparison of emission and absorption components
4.4 Absence of the absorption in NH3 (3,3)

5 CONCLUSIONS