Too long ago for me to speak with authority on the RR Tyne 515 mk. !2 fittted to the CL44 that I knew and loved so much!
I still have a '44 tech manual somewhere in the loft at home, and will be back in a day or two. If no replies to your questions by then I'll try to answer them from home.
You might try to post this on the freight dogs forum, there is a CL44 thread that runs there, frequented I believe by some of the stalwarts who are trying to ressurrect the CL44-O Skymonster (Guppy) whose engines are run regularly.
My not-to-be-trusted memory would have it that the condition lever had positions such as, feather and fire-ex armed, fuel off, low ground idle, high ground idle. From high ground idle it entered the trim range, with a range of I think 50 click stops.
Low and high ground idle were used to start the beast. Low, restricted the fuel flow on start-up, as the Tyne's prodigious demand for air could not be met by it's accelaeration characteristics. Once running in low ground idle, the engine could be slowly accelerated up to high ground idle, which was the normal idle running stting.
After setting full power for the take-off, the pilot's next call was for "88.3%" This was achieved by the F/E pulling the throttles back. Thereafter, he controlled the power through the condition lever, setting the fuel flow.
On the landing approach, you needed 2 hands to fly the Edsel, the power being set by the F/E in response to your request for a given torque setting (400 lbs at MLW rings a bell )
After landing, reverse thrust was achieved by pulling the throttles to the back of their quadrant, and rainsing them over a hump, pulling them further back to accelerate them in reverse. A reassuring call of "4lights" from the F/E indicated the props were in the right plce.
The engine was extraordinary, quite small in size consideriing it's output. The prop though was another matter. That was one real complex device.
Hope this helps,
BSD.