I added 1.3K ohm(three 3.9K ohm resistors in parallel) between A1 and pin 6. It is working fine. I illuminated 100W bulb for 45 minutes. My triac, mounted with 2cm long aluminium heat sink, just get a little warm. When I connected the 373W electric motor for 2 minutes, the triac(with heat sink) was just unberable to touch(about 60-70 celsius) and working perfectly. I need to run the motor for maximum 15-20 minutes. What heat sink should I use.
Thank you guys for all your support.