READ CAREFULLY ALL LISTING BEFORE BUYING!!!!! This listing is for a Brand New, Model QDZY75G, 12V / 24V DC (Air Cooling) Compressor and controller, R600A refrigerant, max. 156w, Refrigerator Fridge Freezer Marine Boat or for Solar Off Grid. Direct low cost replacement for Danfoss BD50 DC compressors Suitable for water dispenser, small refrigerator, small freezer, wine cellar and other small cooling appliances used for car, ship and camping. Electronic controller INCLUDED with purchase of compressor (like on picture) Electronic controller AVAILABLE as spare parts in my store Perfect for AC to 12-24DC fridge conversion for most modern Energy-star mini fridges(Like Danby) that works with R600A(Isobutane gas, ozone friendly) Choose right compressor size and gas, Send me a message if you need help with that! Refrigerant Application Model Dis. Speed –23.3 ?     capacity COP Power cm3 rpm W BTU W/W R600A LBP QDZY75G 7.5 2000 91 310 1.15 12/24V DC 2500 108 368 1.25 3000 130 443 1.35 3500 156 532 1. DIMENSIONS: Soon WIRING:Soon Installation(Fig.1)Connect the terminal plug from the electronic unit to the compressor terminal. Mount the electronic uniton the compressor b100y snapping the cover over the screw head(1).Power supply(Fig.1)The electronic unit must always be connected directly to the battery poles (2). Connect the plus to + andthe minus to -, otherw100100ise the electronic unitwill not work. The electronic unit is protected against reverse battery protection of theinstallation, a fuse (3) must be mounted in the + cable as close to the battery as possible. 15A fuse for12V and 7.5A fuse for 24V circuits are a main switch (4) is used, it should be rated to acurrent of min. 20A. The wire dimensions in Table. 2 must be observed. Avoid extra junctions in thepower upply system to prevent voltage drop from affecting the battery protection setting.Battery protection(Fig.1)The compressor is stopped and re-started again according to the decided voltage limits measured onthe+ and – terminals of theelectronic unit. The standard settings for 12V and 24V power supply systemsappear from Table. 3. Other settings (Table. 1) are optional if a connection which includes a resistor (9)is established between terminals C and P.Thermostat(Fig.1)The thermostat (7) is connected between the terminals C and T. Without any resistor in the control circuit,the compressor with electronic unitwill run with a fixed speed of 2,000rpm when the thermostat isswitched on. Other fixed compressor speeds in the range between 2,000 and 3,500 rpm can be obtainedwhen a resistor (8) is installed to adjust the voltage (v) of the control circuit. Resistor values for variousmotor speeds appear from Table. 4.Fan(optional,Fig.1)A fan (5) can be connected between the terminals + and F. Connect the plus to + and the minus to F.Since the output voltage between the terminals + and F is always regulated to 12V,a 12V fan must beused for both 12V and 24V power supply fan output can supply a continous current of0.5A avg . A higher current draw is allowed for 2 seconds during start.LED(optional,Fig.1)A 10mA light emitting diode(LED)(6) can be connected between the terminals + and D. In case theelectronic unit records an operational error, the diode will flash a number of times. The number of flashesdepends on what kind of operational error was recorded. Each flash will last 1/5 second. After the actualnumber of flashes there will be a delay with no flashes, so that the sequence for each error recording isrepeated every 3 minutes ——————————————————————————————— I always carefully pack items with care to avoid damage during shipping.   If item is undeliverable because of buyer’s wrong, refused, unreclamed or incomplete address. Buyer pays return shipping cost to Seller (Both Original Shipping AND RETURN SHIPPING). Buyer is reponsible for his import charges and fees if occurs. Feel free to contact me for any questions! Thanks