R1224 Regulator
Installation Instruction
24-30-01 12-1001
Page: 6-12 Rev. M: 01 Dec. 2021
© 2021 - Hartzell Engine Technologies - All rights reserved
6.13 Regulator Installation Guide-J
A. General
The AG-5B regulators were connected via a 4-pin plastic plug and a ground wire with a large ring-lug. Cut the
wires near the regulator and crimp the provided ring lugs into the wires. Remove old regulator.
(1) Ensure that the R1224 jumpers are set for 28V. See Plane-Power R1224 Installation Drawing 12-1001.
(2) Install R1224 using the 12-1021adaptor plate. Put the large ring lug on the black wire under one of the
mounting bolts.
(3) Connect the Black (Ground) wire to R1224 #1 (GND).
(4) Connect the Blue (Field) wire to R1224 #2 (Field).
(5) Connect the Red (Enable) wire to R1224 #3 (Enable).
(6) Connect the Yellow (Lamp) wire to R1224 #5 (Lamp).
(7) Jumper R1224 #3 (Enable) to R1224 #4 (Aux).
(8) For R1224 Rev C and later: Ensure that there is a jumper between R1224 #3 (Enable) and #6 (Sense).
B. Lamp Modication
(1) Remove wire EL36A20 from the output side of the Alternator Control circuit breaker and connect it to the
input side of the circuit breaker through a 1A fuse.
(2) Adjust voltage as necessary with engine running and alternator enabled.
The installation is complete after testing.
6.14 Regulator Installation Guide-K
A. Prepare the replacement regulators
(1) Use two R1224B regulators. Ensure regulator jumpers are set to match aircraft battery voltage (12V or
24V).
(2) Ensure that the factory jumper between SENSE and ENABLE is in place on both R1224B regulators.
(3) Add a jumper between SENSE and AUX on both R1224B regulators.
B. Prepare the installation
(1) Tag the wires to both LAMAR regulators: BUS, FIELD, GND, PAR.
(2) Cut the terminals off the end of these wires and install new ring lugs provided with the R1224B regulators.
C. Replace the regulators
(1) Remove the Lamar regulators from the aircraft.
(2) Install the R1224B regulators in the same location using existing hardware.Plug the harness from the
R1224 the aircraft plug.
(3) Connect the wires removed from the LAMAR regulators to the corresponding replacement R1224B:
- GND to GRND
- BUS to ENABLE
- FIELD to FLD
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