Pressure guage running 38lbs

can anyone tell me if its normal upon start for the season to get such a high pressure of 38to 40 lbs
I'm set at 160 190 on an EFM D520

That isn't normal no matter when...

Your boiler pressure relief valve should go off at 30 psi as well as your relief valve on your fill line for your system..

Something seems amiss there. be sure to check these items out.

Are you reading the gauge correctly? (not to be smart..> just checking)

Gauges are famous for being off some, but yours does seem a bit more out of whack than most. I'd try a new gauge before anything else.

The first thing I would do is crack the drain valve and see if it goes down to zero and then close it. Watch and see what happens next. If the pressure returns to 10-15# right away and then creeps up over time, you need a new pressure regulating valve.
Don't forget, you started it up from cold and it was probably at 10-15# to begin with. All that cold water has to expand as it is heated, quite common to have a pressure rise in a case like this.

We have returns of gauges with false readings. Drain to zero pounds and see if the needle is stuck. If the gauge creeps up, especially if it creeps up as the temperature increases and then blows off, you probably have a pinhole leak in your domestic water coil.

Cut off the water supply to the coil on both ends and see if it stops, after you've drained to zero pressure. If it stops, the coil is bad.

I agree to what Mark just said, It isn't really normal. If you are not sure to the things that you are going to do. Maybe you should ask some help to a person that no more in that in your place. Tube Notcher

I post this link a lot

but some think it helps a lot to explain what your looking to maintain or correct. Stick with it - Read it all - there will be a test later

http://www.bellgossett.com/literature/files/1195.pdf

Kind Regards
Sting