Samsung SHC-721A, IR testing

This video surveillance camera has a black & white mode. Usually it is meant for low-light conditions. According to manual, there's not clearly defined what happens in this mode. When lens is removed - in front of the CCD sensor - there is visible some filter foil. That has light green/cyan color. When BW mode is activated, a short "bzzztt" sound is heard. I assume that camera moves the filter away from top of sensor.

I decided to make some experimental testing, to see whether this camera was sensitive to IR. The target was hot soldering iron (Weller WTCP-s). The temparature in the solder tip is approximately +300°C. The equipment setup was:

Samsung SCH-721A camera
Nikon F / C-mount adapter
MF Nikkor 55/2.8 macro lens

results were recorded video clips:
1st, normal room lightning
2nd, very low light level
3rd, no room lightning

Conclusion:
There is no IR sensitivity visible on 1st video clip. On the second video, IR radiation is clearly visible (brighter spot during heat-up cycle). This also shows the position of heating element inside of the solder tip. Third image shows the IR only, because there is not room lightning used. I was just wondering, where could I actually use this for. Has the sun some activity on the IR...? It remains to be seen, where this particular sensitivity is suitable for.