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User manual Dakota Digital, model DAKOTA DIGITAL PAC-2700

Manafacture: Dakota Digital
File size: 123.8 kb
File name: pac-2700.pdf
Language of manual:en
Free link for this manual available at the bottom of the page



manual abstract


(A second relay, sold separately, is required for two speed or dual fan operation). The controller monitors the engine temperature using a dedicated sender, or a gauge and its sender. When the engine temperature goes above a user adjustable set point, the fan is turned on with a relay. When the engine has cooled below a user selectable off temperature, the fan is shut off. Separate on and off temperatures can be set for the high and low fan outputs. The controller will also run the fan when the air conditioner requires, by detecting when the air conditioning clutch is engaged. The unit can be set to keep the fan running (if the engine is hot enough) after the key is turned off. Several delay times are available from no delay to five minutes. The display will countdown the seconds left before the fan is turned off. If the battery voltage drops too low, the fan will be turned off and a “Lo bAt” message will display for the remainder of the time. Settings for several gauge systems are included to make installation with a gauge easier. The included gauges are Stewart Warner, Classic Instruments, VDO, and Autometer. If the gauge being used isn’t included, a custom calibration option allows the system to be calibrated to any gauge with clear numerical temp markings. This is accomplished by setting the controller to match the marks on the gauge with a few steps described in detail in the installation instructions. IMPORTANT NOTE!!!: If using a gauge with this unit, always ensure that your gauge is working properly. If the gauge is not reading correctly, the fan control unit will not have correct temperature information and cannot be guaranteed to properly control the fan, possibly leading to overheating and engine damage. If the gauge uses a two-wire temperature sender (such as Autometer full sweep) use of a dedicated Dakota Digital sender is required. If a gauge is not used, ONLY a Dakota Digital 300.F sender should be used. Other senders may not give a correct reading to the control unit. Custom gauge calibration requires numerical marks, stock “C-NORMAL-H” type gauges cannot be accurately calibrated to. Required components for installation: The PAC-2700 is shipped with necessary components for use with a single fan on a gauged system. These parts include: 1 PAC-2700 module 1 RLY-3 relay with wiring harness 1 Instruction manual For some options of the PAC-2700, additional components are required. These are listed below. - Second RLY-3 assembly (needed for dual fan or two speed fan operation) - 300.F sender Dakota Digital temp sender (for operation without a gauge) Installation Note: Mount ONLY in vehicle cabin. Controller is not designed for engine compartment mounting. The terminal strip on this unit has 6 connections: 1. Fan high relay Connect to the white wire on the high fan relay assembly (for single fan applications leave unconnected) 2. Fan low relay Connect to the white wire on the low fan relay assembly 3. Ground Connect to a good chassis ground 4. Power Connect to a fused 12V battery 5. Sender Connect to the engine temperature sender wire. 6. A/C clutch Connect to the cycle switch on systems with air conditioning (on systems without air conditioning leave unconnected) 7. Ignition Connect to a circuit which has +12V only with the ignition key ON. (switched power) Relay wiring: White Connect to control unit Green Connect to fused 12V battery circuit that can run cooling fan Red Connect to fused 12V battery Black Connect to cooling fan Factory Presets This controller comes preset to use a dedicated sender as follows: Dakota Digital Sender only (no gauge, see above for 300.F sender options) One single speed fan 205.F on temperature 200.F off temperature 30 sec Fan off delay If the factory settings don’t fit your application, you will need to go through the setup procedure on the following page. At anytime during the setup procedure, the key may be turned off and the settings up to that point will be saved. Set Up 1. Press and hold SW2, then turn the key on. 2. Release SW2, then press and release SW1 to move onto the next step. 3. To select temperature scale to use, press and hold SW1 to select (Fahrenheit) or press and hold SW2 for (Celsius). Hold the switch for longer than one sec to select. Once a temperature scale is selected, the display will flash and go on to next setting. 4. Display will now read indicating low fan on temperature is to be set. Use SW1 or SW2 to select the temperature at which the fan should turn on. Press both switches to save the setting. Display will flash once setting is saved. Note: SW1 increases the temperature, while SW2 decreases the temperature. 5. Display will now read indicating low fan off temperature is to be set. Again, use SW1 or SW2 to set the temperature at which the fan should turn off. Press both switches to save the setting. 6. If two fan or dual speed fan mode was previously selected, temperature settings for the high fan output are at this point in setup for con...


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