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C. Spranger Engine Bay cooling Fans, wirering the snap disk Thermostats???????? - Printable Version +- Wanderlodge Gurus - The Member Funded Wanderlodge Forum (http://www.wanderlodgegurus.com) +-- Forum: Yahoo Groups Archive (/forumdisplay.php?fid=61) +--- Forum: WanderlodgeForum (/forumdisplay.php?fid=63) +--- Thread: C. Spranger Engine Bay cooling Fans, wirering the snap disk Thermostats???????? (/showthread.php?tid=6950) |
C. Spranger Engine Bay cooling Fans, wirering the snap disk Thermostats???????? - Kurt Horvath - 08-01-2008 13:38 Curt, In your schematic http://f1.grp.yahoofs.com/v1/gKOTSNmrbGvfm0A0aST0JeRLhmp7wKNO9KYlAoHvj YKjjeGGlXf6HKjUBNlKIMsYotTJj5L0NUIgrddBqqxvQtC2GiNKOYpkiig/PUSHER% 20MODEL%20%27BIRDS%20%20ENGINE%20COMPARTMENT%20HOT%20AIR%20EXHAUST% 20FANS/SPRENGER%20FAN.pdf The wirering for the thermostat uses the existing Snap Disk. Can you recall if it is normally open or normally closed? In the diagram the snap disk terminal is connected to the switch. I'm guessing that the other terminal is to ground, and that the snap disk is normally open. When it closes it grounds the relay setting off the fan? Or is it the other way around? I have both types of snap disks on hand; they are both adjustable for temp. A nice feature. If you could tell me how to finish this installation off. The fans are mounted, so is the control box and it's hot. The manual switches work as designed, switches up to blow out and switch down to suck in air, middle position is off. I just have to install the snap disk thermostats and I'm done. It will sucks or blows extremely well. I really like your design, I thought I would have to choose between the two now I have both options. Also I didn't read this until after I built the control box," The two switches can not be operated at the same time; one must always be in the center position. The work around is to install Rectifiers (diodes) in the 2 center leads on one switch. That would prevent current from colliding and opening (tripping) the circuit breaker. I need to get a couple rectifiers and install them, But for now I just make sure that only one switch is active at a time". The 12v accessory plug works and I'm sure the automatic side will function as designed as soon I figure out how and which snap disk thermostat to use. Also the two extra circuits I installed are hot and I will wire one to some cooling fans for the inverters ASAP. The other is a spare for future expansion. The only part of the project that failed is the remote controlled 20amp relays. I installed an enclosed relay system with 8-20amp remote controlled relays. I'm sure they are correctly installed but when you hit the remote to activate a circuit, you can hear the relays switching but there is no power to the wires. Need to do some troubleshooting there. I have the 200 amp battery relay installed, and all is working well. House, Chassie batteries show 13.5 to 14 and the alternator is no logger pegged out. Any and All Help appreciated! Kurt Horvath 95 PT-42 WLWB 10AC C. Spranger Engine Bay cooling Fans, wirering the snap disk Thermostats???????? - Richard Hayden - 08-03-2008 07:24 Kurt,
I'm not Curt but his and mine are the same and the snap disc is normally open. When it closes it sends ground to whatever is being controlled.
I have finished this same drill but wired it a little differently. I used one direction/off switch and operate switches up front on the upper dash and a switch in the engine room. Nothing happens if the 3-position switch is in the off position naturally. I used no diodes or rectifiers.
One thing I notice after engine shutdown is that when the air is in the IN direction, the fans cycle several times before they stop for good. That is reasonable as in theOUT direction the fans are drawing heat from the radiator as well. But, they don't cycle nearly as much if at all. I seem to favor the IN direction for less battery drain and quicker cooling of the above engine area.
Good luck.
Dick Hayden - '87 PT 38 - Lake Stevens, WA
C. Spranger Engine Bay cooling Fans, wirering the snap disk Thermostats???????? - Curt Sprenger - 08-04-2008 07:56 Just got back to home base. The Snap Disk is normally open.
On Fri, Aug 1, 2008 at 6:38 PM, Kurt Horvath <"bumpersbird@yahoo.com"> wrote:
-- Curt Sprenger 1987 PT38 8V92 "MacAttack Racing" Anaheim Hills, CA |