The temperature limit on heat pumps (which is the name for air conditioners, refrigerator compressors, dehumidifies, etc.) is not for fire control, but reflects that performance of the gas used in the compressor and its lubrication. Most cannot run above 115 F about.
The original posting says that the lumber pile is 8 feet long and the stickers are 1" thick (1/12 foot) and there are about 30 layers. So, this means that the air space is 1/12 x 8 x 30 or 20 square feet. So, then take the cfm and divide by 20 to get the velocity. So, 1200 cfm means 60 feet per minute. For white wood drying and pine, we need over 600 rpm velocity. For most hardwoods, 300 fpm.
We also need a good sized space between the wall and the edge of the lumber pile. I suggest at least four feet. Plus as mentioned, using a curved baffle in the top corners will help flow.
Do you reverse air flow?
It is fundamental that the volume of air going into a load is identical to the air coming out. So, if you have 300 fpm air velocity going in (which is extremely hard to measure accurately without spending thousands of dollars), you must have the same average coming out (which is easy to measure). If air flow out is low, so is the incoming.
Note the the original posting says that width is 2,400 mm. (In the US, we use a comma and not a decimal.), but it looks closer to three or four feet...1000mm. So it would seem that this load is about 900 to 1000 BF and so it will be about 28 pints or 3-1/2 gallons of water per 1% MC loss. So, your one liter per hour is about 7 gallons per day or 2% MC loss, which is fairly low for this species, and most species.