16797 PWM Electric Fan Controller
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Specifications
- Part Number: 16797
- Maximum Capacity: 70 Amps
- Auto Resetting Circuit Breaker: 50 Amp
- Main Power Connections: Directly to vehicle’s battery
- Temperature Sensor: Aluminum, quick reaction time
- Override Circuit: Green wire for fan speed control
- Cool Down Function: Fans run for 20 seconds after vehicle
shutdown
Product Usage Instructions
Installation
- Read the instructions thoroughly before starting the
installation process. - Ensure all kit contents are present and organized.
- Gather necessary tools as listed in the manual.
- Identify the appropriate location for installing the PWM Fan
Controller. - Follow the wiring diagram provided in the manual for proper
connections.
Main Power Connections
It is crucial to connect the positive and negative wires of the
fan controller directly to the vehicle’s battery. Avoid connecting
to the fuse panel, starter, or alternator.
Temperature Sensor Installation
Mount the temperature sensor on the radiator tank using the
provided double stick tape. Ensure the surface is clean and free of
any contaminants for accurate temperature readings.
Override Circuit Usage
The green wire acts as an override circuit to control fan speed.
Activate it to ramp up fans to 60% running speed. The fans will
adjust their speed as engine temperature increases.
Cool Down Function
The PWM fan controller includes a cool down function that allows
the electric fan(s) to run for 20 seconds after the vehicle is
turned off. This helps in cooling down the engine.
Frequently Asked Questions (FAQ)
Q: Can I connect the fan controller directly to the fuse
panel?
A: No, it is important to connect the fan controller directly to
the vehicle’s battery for proper functionality.
Q: How do I know if my fans exceed the 70 amp maximum
capacity?
A: Check the amp draw of your fans before installation. If they
exceed 70 amps, warranty will be void.
Q: What should I do if the temperature sensor does not provide
accurate readings?
A: Ensure the sensor is mounted on a clean surface free of dirt,
oil, or contaminants. Contact technical support for further
assistance.
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INSTALLATION INSTRUCTIONS PWM ELECTRIC FAN CONTROLLER
PART # 16797
Please read these instructions completely before beginning installation
KIT CONTENTS
QTY. DESCRIPTION 1 PWM Fan Controller 1 Sensor (Pre-wired to controller) 1 50 Amp Circuit Breaker 6 #10 Sheet Metal Screw 1 2ft 10 AWG Red Wire 1 Yellow Butt Connector 2 Yellow 5/16″ Ring Terminal 2 Yellow #10 Ring Terminal 2 Blue Wire Tap Connector 4 4″ Wire Ties
TOOLS NEEDED
Drill 5/32″ Drill Bit Multimeter / Test Light Standard Screw Driver 5/16″ Nut Driver Standard Screw Driver (1/8″ wide blade) Wire Stripper Wire Crimping Tool
IMPORTANT NOTES
This fan controller has been completely quality control tested prior to final packaging.
MAXIMUM CAPACITY: 70 AMPS This controller will operate multiple fans with a combined maximum amperage up to 70 amps. On dual fan applications, it is important to know your fan(s) amp draw before installing, if fan(s) exceed 70 amps, all warranty will be void.
AUTO RESETTING CIRCUIT BREAKER The fan controller utilizes a 50 amp auto resetting circuit breaker to protect the fan(s) and controller circuit. In the event of an electrical issue, the breaker will “trip” and open the connection between the battery and the controller. The circuit breaker will automatically reset once the issue has been corrected. If installing fan(s) exceeding 50 amps in total you must use a fuse or circuit breaker suitable for your systems amp draw.
MAIN POWER CONNECTIONS The positive and negative wires feeding the fan controller MUST be connected directly to the vehicles battery.
This is very important because the controller requires a clean signal, do not connect directly to the fuse panel, starter or the alternator.
VEHICLES BATTERY LOCATION If the vehicles battery is located more than 5 feet from the fan controller, the signal could encounter some interference or noise, which causes a dirty signal. In some cases, a larger 6 gauge wire may be required. Please contact our technical support team for more information. 323-266-3850 or techsupport@usmotorworks.com
TEMP SENSOR This unit is equipped with a newly released aluminum temp sensor that reacts 50% quicker than previous models. It uses 3M double stick tape to adhere right to the radiator tank, therefore getting a very accurate temperature reading. The surface preparation is critical; surface must be absolutely free of dirt, oil, peeling paint or any contaminants to ensure a proper bond.
Important: The ideal application temperature range is 70°F to 100°F (21°C to 38°C).The minimum suggested application temperature is 50°F (10°C). At 70°F approximately 50% of the ultimate bond strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours.
OVERRIDE CIRCUIT The fan controller has an override circuit (Green Wire) available that when activated, will ramp up the electric fans to 60% running speed. As the engine temperature increases the fans will increase accordingly.
WIRE CONNECTIONS Crimp connections are critical to the function of this controller, please ensure that all connections are made using quality crimpers. After each crimp has been completed, tug wires, there should be no movement within the connector. Ground connectors are crucial. If grounding to chassis we do not recommend using self tapping screws as they tend to loosen over time.
COOL DOWN FUNCTION This PWM fan controller is designed with a cool down function that will allow the electric fan(s) to run for 20 seconds after the vehicle has been turned off.
(Page 1)
RevA-10-6-2021
16797-InstructionSheet
FAN CONTROLLER INSTALLATION 1. Choose a convenient location, preferably along the vehicles core support near
the battery. Take in to consideration sensor placement & wire routing requirements. Avoid mounting near HOT engine components or a location that would be in direct contact with any road debris.
Diagram #1
Cross-flow radiator
Inlet
2. Using the fan controller as a template, mark and drill four 5/32″ holes in the proper location.
3. Using four #10 sheet metal screws supplied, secure the unit in place. CIRCUIT BREAKER MOUNTING
Sensor install option
1. Choose a convenient location for the circuit breaker that is between the fan
controller and the battery.
Outlet
2. Using the circuit breaker as a template, mark and drill two 5/32″ holes in the proper locations.
3. Using the remaining two #10 sheet metal screws supplied, secure the circuit breaker in place.
Down-flow radiator
Inlet
SENSOR INSTALLATION
1) Determine the desired mounting location of the sensor, somewhere on the radiator near the water inlet. (See Diagram #1)
2) Route the path of the sensor wires from the controller to the radiator. If necessary, you can lengthen or shorten the wires using an automotive grade 22-gauge wire.
Sensor install option
Outlet
3) Once you have routed the wires and have the sensor location chosen, clean and dry the area with alcohol, making sure there is no left over residue.
4) Remove the Red 3M backing paper from the sensor and install the sensor in the desired location, applying firm pressure for at least 15 seconds.
NOTE: This unit uses 3M double stick tape to adhere right to the radiator tank, therefore getting a very accurate temperature reading. The surface preparation is critical; surface must be absolutely free of dirt, oil, peeling paint or any contaminants to ensure a proper bond.
The Ideal application temperature range is 70°F to 100°F (21°C to 38°C).The Minimum suggested application temperature is 50°F (10°C). At 70°F approximately 50% of ultimate bond strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours.
WIRING Before starting, disconnect the negative (-) cable on the vehicles battery. Using the electrical connectors and wire ties provided, follow the instructions below. WARNING: The positive and negative wires feeding the controller MUST be connected directly to the vehicles battery. This is very important because the controller requires a clean signal, do not connect directly to the fuse panel, starter or the alternator. Improper installation will void the warranty. 1. Using a yellow 5/16″ ring terminal & 10 AWG Red Wire supplied, connect one end of the Red Wire to the vehicles positive
(+) terminal on the battery. 2. Route the 10 AWG Red Wire now connected to the battery to the circuit breaker previously installed and cut the wire to the
appropriate length. 3. Using a yellow #10 ring terminal, connect the 10 AWG Red Wire to the “BAT” (Copper Colored) terminal on the circuit
breaker. 4. Using a yellow #10 ring terminal, connect the auxiliary side “AUX” (Silver Colored) of the circuit breaker to the length of 10
AWG Red Wire of the controller wire harness. 5. Using a Yellow Butt Connector connect the Blue Wire from the controllers wire harness to the Positive Wire(s) of the
Electric Fan(s) being controlled. 6. Using the 5/16 Yellow Ring Terminal connect the 10 AWG Black Wire from the controllers wire harness direct to the
batteries negative terminal. 7. Connect the electric fan(s) being controlled direct to the negative stud or a good chassis ground. Use the shortest wire
route possible.
NOTE: Grounding point MUST be separate from mounting screws for control module.
8. Using a Blue Wire Tap connector attach the Yellow Wire to a Positive (+) switched ignition source.
(Page 2)
Green Wire: Override Circuit (Optional) The green wire is designed to work in two different configurations. When used, this will allow the electric fan(s) to be turned on regardless of the temperature of the cooling system. The fan speed will quickly ramp up to 60% and will operate between 60 and 100% as temperature increases and decreases. Connect the Green wire to either option A or B below. Note: Use of the Override is optional and not required for the PWM controller to work properly. A. A/C Override – Using the blue wire tap connector provided, attach the green wire to a positive (+) 12V output on the A/C
Switch on the dash (must be powered the entire time the A/C is on). B. Manual Switch Override – Attach the green wire to the 12V output on the manual switch (not provided.)
VEHICLE TESTING 1. Before you start the vehicle, make sure all wires are safely zip tied and away from any moving parts. 2. Start the vehicle. 3. If the manual override function is being used, turn on the A/C or manual switch. Electric fan(s) will ramp up to 60%. 4. Turn off the manual override or A/C function and allow the engine to warm up, fans will ramp up slowly as the vehicle warms up.
ADJUSTING THE TURN-ON TEMPERATURE
The PWM Controller is factory set at approximately 180°F. Therefore Fans will adjust speed to maintain 180°F fluid temperature. Using the adjustment screw on side of the controller the temperature can be adjusted to maintain fluid temperatures from 130°F – 230°F. Follow the directions below to make adjustments to the temperature.
Diagram #2
1. Remove the rubber plug from the side of the fan controller
2. Using a 1/8″ blade screwdriver, follow the instructions below:
If your engine is running too cool: Turn the adjustment screw CLOCKWISE in increments of 2 FULL turns, then test before repeating.
If your engine is running too hot: Turn the adjustment screw COUNTER-CLOCKWISE in increments of 2 FULL turns, then test before repeating.
WIRE COLOR QUICK REFERENCE GUIDE Red Wire: Battery Positive (+) Black Wire: Battery Negative (-) Blue Wire: Fan Positive (+) Yellow Wire: Positive (+) Switched Ignition Source Green Wire: A/C Override or Manual Override 12V Positive (+)
(Page 3)
Please direct all technical questions to our Derale tech line at 323-266-3850
Warning: Installation of accessories should only be undertaken by those with mechanical knowledge and are familiar with working on vehicles. Always use eye protection (goggles, safety glasses or shield). Park the vehicle in a well lit area, on level ground and apply the parking brake. Only work on a cold vehicle that has been sitting overnight, failure to do so will result in severe burns and injury. Before starting the vehicle, make sure no tools or any other items are left under hood that could interfere with or be drawn into moving parts of the engine. Failure to follow instructions can lead to severe damage and personal injury.
Derale Performance, Los Angeles, CA 830203.422616.63288580 www.derale.com
(+)
(-)
PWM Fan Controller
Yellow Wire
Battery
Q
U
I
Yellow 5/16″ Ring Terminal
Yellow 5/16″ Ring Terminal
Positive (+) switched ignition
source
Green Wire
Optional Override Circuit
12 (+)
C
IMPORTANT
K
Positive and Negative Controller wires must be connected to the
vehicles battery
Black Wire
R
E
Red Wire
F Yellow #10 Ring Terminal
Yellow #10 Ring Terminal
E
B
A
A
U
T
X
R
Circuit
E
Breaker
N
C
E
Blue Wire
Connect the Blue Wire from the wire harness to the Positive (+) Wire(s) of the Electric Fan(s).
Sensor Wire
Inlet
Radiator (Sensor Placement)
Sensor install option
Outlet
Fan(s) (-)
Connect the Negative (-) wires on the electric fan(s) to a good chassis ground.
G U I D E
Fan(s) (+)
Yellow Butt Connector
Fan(s) (-)
Brown (+) High Speed
Gray (+) Low Speed
Fan(s) (-)
Fan(s) (-) Fan(s) (+)
Derale Performance PART # 16797 Customer Service 323-266-3850
Single Electric Fan Setup
Single Two Speed Electric Fan Setup
Dual Electric Fan Setup
(Page 4)
ATTENTION
If you have any technical questions about this controller
please contact Derale Performance.
Phone: 323-266-3850 Email:
techsupport@usmotorworks.com
Documents / Resources
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DERALE 16797 PWM Electric Fan Controller [pdf] Installation Guide 16797, 16797 PWM Electric Fan Controller, 16797, PWM Electric Fan Controller, Electric Fan Controller, Fan Controller |