Advertisement
Operation
The electric cooling fan controller provides a way to run up to two electric engine cooling fans or one two speed cooling
fan. (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 5 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 be displayed for the remainder of the time.
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, there is a custom calibration function
that allows the system to be calibrated to any gauge with clear 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 a gauge is not used, ONLY a Dakota Digital 300°F sender should be used. Other senders may not give a
correct reading to control unit.
Required components for installation:
The PAC-2000 is shipped with necessary components for use with a single fan on a gauged system. These parts include:
1
PAC-2000 module
1
RLY-1 relay with wiring harness
1
Instruction manual
Note: mount in vehicle cabin
For some options of the PAC-2000 additional components are required. These are listed below.
Second RLY-1 assembly (needed for dual fan or two speed fan operation)
300°F sender Dakota Digital temp sender, (for operation without a gauge)
Installation
The terminal strip on this unit has 6 connections:
1. Fan high relay
2. Fan low relay
3. Ground
4. Power
5. Sender
6. A/C clutch
7. Ignition
Relay wiring:
White
Green
Red
Blue
Black
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 deg F on temperature
200 deg 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.
Connect to the white wire on the high fan relay assembly
(for single fan applications leave unconnected)
Connect to the white wire on the low fan relay assembly
Connect to a good chassis ground
Connect to a fused 12V battery
Connect to the engine temperature sender wire.
Connect to the cycle switch on systems with air conditioning
(on systems without air conditioning leave unconnected)
Connect to a circuit which has +12V with the ignition key ON.
Connect to control unit
Connect to fused 12V battery circuit that can run cooling fan
Connect to fused 12V battery
Not Connected
Connect to cooling Fan
MAN# 650113D
Advertisement
