Piper Navajo PA-31 Service Manual page 810

SURFACE
DE-ICE
5 AMP
SDIC
WING
(PUSH TO TEST)
PIPER NAVAJO SERVICE MANUAL
EL35
49850
SURFACE
DE- ICE SW
TIMER
28V D.C
GROUND
TRIGGER
12 SEC.
12 SEC.
2ND 6 SEC.
I ST 6 SEC.
a
GYRO-REG.
SOLENOID
WING
DE- IC
ENGAGE
VALVES
;E
(2 STAGE)
R. REGULATOR
SOLENOID
TAIL
LO (DE-ICE SYS. OFF)
HI (DE-ICE SYS. ON)
(2 STAGE)
L REGULATOR
SOLENOID
TAIL
(PUSH TO TEST)
TAIL
PRESSURE SW.
Figure 11-74. Pneumatic Deicing
(S/N 31-8012001 and up)
Revised: 10/12/83
4F12
ELECTRICAL SYSTEM