Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Does the transformer need to be grounded? And if so how? Thanks
Document: I used this little bad boy to power my two Honeywell VR8200A2132 gas valves that I installed on my Brutus 10 homebrew stand that I built. Does what I need it to do and fit the bill.
Fast deliver, looks good, firts perfectly but not the right one. The one i received is missing the back mounted circuit board and has a 3 inch ribbon cable. The one I need has the circuit board and a approx. 8 in ribbon cable.... Darn it!My model is H250FDN - Serial # (21) 130805102594001. The specs clearly state this is a replacement for the H250fDN but it is not.Now what?
This is the NORMAL transformer!
Regular transformer that comes with door bells is too week to ring two bells, but this one did the job.
stuck this in the HVAC unit in the attic. the two tabs above the transformer was a little too tall for the enclosure but i just bent them down and its good to go.
Needed a transformer when I added my new zone board. Works great! Just be sure you get the right amperage!
I used this transformer to operate a contactor for my 220v shop heater. It has plenty of power for this function and doesn't buzz. Recommended.
The transformer on my TACO circulator control blew and this was a replacement action instead of buying a whole new control. cut the old one out, wire nut the connections and viola--good as new
IT's a transformer, it works, and by installing it in a tenants furnace, I was able to handle an otherwise costly repair myself. I'm glad I thought to check Amazon for pricing because I was having a hard time even sourcing a unit locally.
Bought this to replace a broken transformer for our downstairs heater. This was half the price of local shops selling it. It was brand new in the box, perfect fit, quick shipping and as I said, 1/2 the price. Got to love Amazon!
Answer: No, it can be mounted to a wood surface without grounding.