Danfoss Fan Drive HIC Technical Information
Fan Drive HIC Technical Information
P108 319E
A
B
GP
T
P108 311E
GT
GP
T
Quick Reference
Fan Drive HICs Model No. Description Flow Pressure Page
RFDE-40-000 Fan Drive HIC with
Reversing Control
10 - 40 l/min
[2.6 - 10.5 US gal/min]
210 bar
[3000 psi]
FD - 5
RFDE-80-000 20 - 80 l/min
[5.3 - 21.1 US gal/min]
Fan Drive HICs Model No. Description Flow Pressure Page
RFD-120-000 Fan Drive HIC with
A
Reversing Control
Up to 120 l/min
[31.7 US gal/min]
See performance chart
210 bar
[3000 psi]
210 bar
[3000 psi]
FD - 5
FD - 7
P
B
Fan Drive HICs Model No. Description Flow Pressure Page
RFDE-40-PRV Fan Drive HIC with
Proportional and
Reversing Control
RFDE-80-PRV 20 - 80 l/min
10 - 40 l/min
[2.6 - 10.5 US gal/min]
[5.3 - 21.1 US gal/min]
210 bar
[3000 psi]
210 bar
[3000 psi]
FD - 9
FD - 9
Fan Drive HICs Model No. Description Flow Pressure Page
RFD-120-PRV Fan Drive HIC with
Proportional and
Reversing Control
P
Up to 120 l/min
[31.7 US gal/min]
See performance chart
210 bar
[3000 psi]
FD - 11
BC332376063114en-000101 • February 2020
GT
FD - 1
Fan Drive HIC Technical Information
Application notes
OVERVIEW
Variable pump fan drive circuits:
- Provide reversing control and over-
pressure protection/anti-cavitation
Fixed pump fan drive circuits:
- Provide modulating and reversing
control with over-pressure protection/
anti-cavitation
O-highway mobile machinery OEMs and distributors can choose from six preengineered Hydraulic Integrated Circuits (HICs) designed to provide speed control and
reversing for hydraulic modulating fan drive motors in open circuit hydraulic fan drive
systems. The program includes:
• 40, 80, and 120 LPM Frame Sizes
• Variable piston pump or xed pump circuits
• Over-Pressure Protection / Anti-Cavitation is standard
• Viton O-rings are standard
40 & 80 LPM 120 LPM
RFDE-40-000 & RFDE-80-000 RFD-120-000
RFDE-40-PRV & RFDE-80-PRV RFD-120-PRV
Functions
• Proportional relief valve:
– Regulates fan speed by controlling pressure drop across fan motor
– Normally closed to ensure full fan speed in the absence of electrical signal
– PLUS+1® compliant
• Piloted directional control valve:
– Reverses ow to the fan motor to reverse fan direction
– Open transition spool reduces pressure spikes during reversals
– Sized to minimize parasitic losses due to pressure drop
• Dual shock valve with anti-cavitation checks:
– Trims the maximum motor torque by absorbing pressure spikes (shock eects) at
the work ports
– Anti-cavitation feature allows additional ow to the motor through the tank port
when motor overruns the pump
– PVLP shock valves (from PVG) allow for a compact design
• Custom designs available upon request
BC332376063114en-000101 • February 2020
FD - 2
Circuits - Variable Pump
or Fixed Pump
Fan Drive HIC Technical Information
Application notes
RFDE-40-000, RFDE-80-000 & RFD-120-000
• Variable Pump fan drive circuits
• HIC provides reversing control and over-pressure
protection/anti-cavitation
• Variable pump provides modulation (speed
control)
Features
• Proportional Fan Speed Control:
– Electronically match fan speed with cooling demand
– Conserve engine power and fuel for the majority of operating conditions - as
compared to non-proportional systems
• Increased design exibility:
– The compact HIC valve can be placed in the most suitable location on the machine
– Minimize fan system pressure losses when choosing the optimal fan drive HIC size
for the application
– Internal and external reversing pilot options available (40 LPM & 80 LPM )
– Drain port included on all models for motor case drain
– Robust IP69K Deutsch coil standard for all three sizes
• Increased productivity:
– Fan is reversible to purge (de-clog) coolers and radiators
– Prevents overheating with purged cooler
– More power available for useful work when radiator is not clogged
RFDE-40-PRV, RFDE-80-PRV & RFD-120-PRV
• Fixed Pump fan drive circuits
• HIC provides modulating and reversing control with
over-pressure protection/anti-cavitation
BC332376063114en-000101 • February 2020
FD - 3
Fan Drive HIC Technical Information
Application notes
Features (continued)
• Automatic cleaning sequence programmed using PLUS+1™:
– Manual or automatic activation
– Reference Danfoss Power Solutions ‘Fan Drive Application Block’ information
• Custom designs available upon request
Service screen below illustrates an example reversing fan drive software setup
BC332376063114en-000101 • February 2020
FD - 4
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