Thermostatically Controlled Heating Element
Recommended Wiring Diagram and
Installation Instructions
Aerofiner II
Air Dryer
#10 Screw
Black
Ground
Note: The RN977 and RN978 thermostatically controlled heating
elements are set to provide heat when the temperature falls below
+30°F and will automatically shut off at +45°F.
Install the heating element by inserting the heater tube into the
"HEAT" port on the bottom of the AREOFINER II unit. Secure the
cartridge with the self-tapping screw provided. Slide the boot over
the leads and push onto the thermostat. A lead wire* can then be
attached, from the vehicle electrical system to the red heater lead.
The black lead must be secured to a good vehicle ground.
Bottom view of
Aerofiner II Unit
showing heater port.
* Lead wire and ground wire are not provided with the heating element. It
is suggested a minimum 18 AWG Gauge stranded wire be used for
durability in service.
Commercial Vehicle Systems
Haldex Brake Products Corporation
10707 N.W. Airworld Drive
Kansas City, MO 64153-1215
Phone: (816) 891-2470
Fax: (816) 801-4198
L31096 US 3/07 2M ART (Last Rev 03/02)
Ignition
Switch
Ground
Red
Optional
Battery
Wiring
Installation
Pilot Hole
Heat Port
Haldex Limited
525 Southgate Drive, Unit 1
Guelph, Ontario Canada N1G 3W6
Phone: (519) 826-7723
Fax: (519) 826-9497
www.haldex.com - www.hbsna.com
Installation
Guide
L31096
Rev. 03/02
AEROFINER II
AIR DRYER
HEATING ELEMENTS
RN975/RN976
RN977/RN978