Vdc And 24 Vdc Electric Pre-Heater Installation - Davco FUEL PRO 382 Technical Manual

T e c h n o l o g y , L L C

12 VDC AND 24 VDC ELECTRIC PRE-HEATER INSTALLATION

The Fuel Pro 382 12 VDC or 24 VDC electric pre-heater is
installed in the processor base as shown in Figure 4
Step 1: Drain all the fuel from the Fuel Pro The fuel can
be reused after the pre-heater is installed If the fuel is not
reused, dispose of it in an environmentally safe way
Step 2: Remove the pipe plug in the Fuel Pro base plate
Step 3: Apply liquid thread sealant to the pre-heater
threads and install into the Fuel Pro base Tighten to 15-30
ft-lbs
Step 4: Connect the chassis harness and wire
• For 12 VDC or 24 VDC without a relay, refer to Figure 5
• For 12 VDC or 24 VDC with a relay, refer to
Figure 6
• If the keyed circuit will not handle a minimum of 20
amps, use a relay
• Provide proper (20 amp fuse) electrical protection for
source voltage supplied to the pre-heater
Step 5: Remove the vent cap from the top of the clear
cover Pour fuel into the Fuel Pro to one inch below the
top of the filter element Reinstall the vent cap and hand
tighten
Step 6: Start the engine When the lubrication system
reaches its normal operating pressure, increase engine
speed to high idle for one to two minutes After the air is
purged, loosen the vent cap until the fuel level drops to
just above the collar Tighten the vent cap by hand only
DAVCO Technology, LLC
®
Figure 4
P. O. Box 487 Saline, MI 48176
TECHNICAL MANUAL
Pre-heater Wiring without Relay
Key Controlled Circuit
Fuse*
20 A
+
Battery
GND
*24 VDC pre-heaters require a 15 A fuse
Pre-heater Wiring with Relay
Fuse*
20 A
+
Battery
Key Controlled Circuit
GND
*12 VDC pre-heaters require a 20 AMP fuse If the keyed circuit will not
handle a minimum of 20 amps, use a relay
Call 800-328-2611
8
FUEL PRO
®
FUEL PRO
Switch
Heater element
GND
Figure 5
FUEL PRO
Heater element
Relay
GND GND
Figure 6
www.davco.com F1271 REV C
Updated 09/05/2012
382