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240Z Air Conditioning

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  • #46
    Wiring - A:C, Fan, Fuel Pump p2.jpg

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    • #47
      Wiring - A:C, Fan, Fuel Pump p1.jpg

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      • #48
        Here's the ladder logic for the wiring - a bit old school for sure. Oct 28 240 wiring - A:C, Fan, Fuel Pump.jpeg

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        • #49
          Console installed - looks "almost" stock. Happy to report that the fan works extremely well - lots of flow - and the "mode" switch changes the air flow to the vents. All vents get air as designed. I've got a plan to install a small actuator to open and close the fresh air vent at the cowl. Just waiting for the actuator to be delivered, more on that later. Installed the engine & xmission on the weekend, now I can get going on the electrical etc. Rebuild diary being updated today.
          AC 11 22 ctl pnl.jpg

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          • #50
            I kept the vent assembly that pulls air from the high pressure area below the windshield (see earlier in this post - I cut the fan off but kept the vent door and plenum). But that left me with the problem of needing a mechanism to operate the door. Solution - an electric door lock actuator (<$10) and a momentary rocker switch on the centre console. Installed it this morning:
            Door closed
            AC 11 29 actuator 1.jpg Door Open
            AC 11 29 actuator 2.jpg Installed under the dash - tucks in neatly, not interference, almost OEM:
            AC 11 29 actuator 3.jpg

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            • #51
              Needed to address the cooling - likely extra load with the AC, not much science here (BTU's in, out, cooling required, who cares, go big!)
              I investigated the Honda Civic fans, couldn't get a thickness dimension. Decided that I needed to do some in-person measurements. You'll see in these photos that, with the AC compressor in place, I don't have much clearance. I went to my local speed shop with tape in hand, left with 2 Proform 12" fans (rated at 1200 cfm each). Pretty cheap too. With a little carving they mounted perfectly. The fans are screwed together in the middle, bolted to the rad at each side, foam pads to keep them off the coils. Solid. After initial fitment I had to relocate them to the top of the rad to clear the AC compressor. I'm going to run a BMW 2 temp switch, Volvo relay, run one fan on low, both fans on high. Electrical details will be posted later (once I've confirmed that it works). I'll need to add a diode between the fans so that only one comes on for low speed.

              12 8 two fans.jpg
              Installed - tight but about 3/8" clearance at the AC compressor pulley. I'll have to swing the compressor out of the way to change the belt.

              12 8 rad installed.jpg

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