Instruction Manual

16735-InstructionSheet Rev-3-11-2011
Derale Performance, Los Angeles, CA 800.421.6288 www.derale.com
INSTALLATION INSTRUCTIONS
SINGLE STAGE ELECTRIC FAN THERMOSTAT
PART # 16735
(Continues on reverse side)
KIT CONTENTS
QTY. DESCRIPTION
1 Thermostat Switch
1 Relay Wire Harness
1 3/8” NPT Thread-in Probe
1 Push-in Probe
1 1 x 1 Foam Pad
1 Retaining Clip
4 4” Wire Ties
QTY. DESCRIPTION
1 Blue 5/16” Ring Terminal
3 Blue #10 Ring Terminal
2 Blue Butt Connectors
2 Blue Female Connectors
2 Blue Wire Tap Connectors
4 #10 Sheet Metal Screw
IMPORTANT
This single stage electric fan thermostat will
control up to two different fans with a
If fans exceed 25 amps combined we recommend
using one switch per fan.
COMBINED
MAXIMUM DRAW OF 25 CONTINUOUS AMPS.
Please read these instructions completely before beginning installation
(Continues on reverse side)
THERMOSTAT PROBE INSTALLATION
Option 1
This kit includes two thermostat probe options.
Choose the option that best fits your application.
(See Diagram #1)
(See Diagram #3)
For best results we recommend installing the Push-in Probe as
close as possible to the water inlet of the radiator. (See Diagram #2)
1. Take the Push-in Probe and thread it clockwise onto the Thermostat Switch.
2. Carefully insert the probe/thermostat assembly into the fins of the radiator
until Thermostat Switch is flush with radiator.
3. Install the 1 x 1 foam pad onto the Push-in Probe.
4. Install Retaining Clip onto the Push-in Probe until tight. (See Diagram #1)
Option 1 - Push-in Radiator Probe
Option 2 - Thread-in Radiator Probe
Placement:
Installation:
Push-in
Radiator
Probe
Down-flow Radiator
Option 2
Placement:
Installation:
Note:
Locate a 3/8” NPT port either on the radiator, waterneck, intake
manifold or cylinder heads.
1. Using Teflon tape or suitable sealant install the probe into the
on the vehicle.
2. Using a 3/4” wrench tighten the probe.
3. Carefully thread the Thermostat Switch clockwise into the Push-in Probe now
installed on the vehicle. Sealant such as Loctite can be used for permanent
installation. (See Diagram #3)
DO NOT TIGHTEN THERMOSTAT WITH A WRENCH, HAND TIGHTEN ONLY.
3/8” NPT
Thread-in Probe
Diagram #2
Push-in
Radiator Probe
Water
Inlet
Water
Outlet
Cross-flow Radiator
Water
Inlet
TOOLS NEEDED
12V Test Light
Wire Stripper
Crimping Tool
3/4” Wrench
RELAY WIRE HARNESS MOUNTING
1. Taking into consideration probe placement and wire routing requirements, choose a convenient location.
Avoid mounting near HOT engine components.
2. Using the relay bracket as a template, mark and drill a 5/32” hole in the proper location.
3. Using the #10 Sheet Metal Screws provided, install the relay/wire harness.
Teflon Tape
Standard Screw Driver
or a 5/16” Nut Driver
Drill
5/32” Drill Bit
Radiator
Foam Pad
Retaining
Clip
Push-in
Probe
Diagram #1
Thermostat
Switch
Diagram #3
Thermostat
3/8” NPT
Brass Probe
3/8” NPT
Brass Probe
Water Jacket