(2)
 By placing the NO.1 ENG ANTI-ICE switch in the ON position, the No.1 Engine Anti-Ice system is activated (#1 ENG ANTI-ICE ON light illuminated), and the No.1 Engine Inlet Anti-Ice system is activated (#1 ENG INLET ANTI-ICE ON light illuminated).

Engine & Engine Inlet Anti-Ice

ver 1.0
UH-60 PNEUMATIC SYSTEM

AIR SOURCES (4)

AISBV can be opened/closed by pilot for A/I function.
APU
AISBV can be opened/closed by HMU for compressor bleed function.

#1 Engine

AMBIENT
When switch is in ENG. position, crossbleed valves are armed#2 ENG INLETAIR SENSOR
#2 Engine
& will open if P-2.5 is present. With switch off, both valves close.ANTI-ICE ONPORT
External (GPU or other UH-60)

When switch is in APU position, apu start/bypass valve (turbomach
#2 A/I valve is passing
USE OF BLEED AIR
P-2.5toinlet assy.
apu only) closes when either start button is pressed (a start relay
#2 ENGINE
#1/#2 Engine start (single or dual engine start)Extended
CONTROL
TS
function). With switch OFF, valve remains open and vents a large
Fuel

RangeSTARTER
Cockpit heatportion of apu air overboard. To remove 100% of apu bleed air
INLET A/I
Pressurization of external fuel tanks
System
from the pneumatic manifold system the apu must be shut down.
VALVE
Engine & Engine inlet anti-ice(Garrett type APU's don't have a start/bypass valve)
Export to other helicopter (via buddy hose)
AGB

gill slitsfuel
P-3burn
cool

PTO
P-2.5 NgNp
Np
P-3
HEATER
SHUTOFF
AMBIENT
VALVEVENT BLOWER
AIR (solinoid)

AISBV

#2 ENG
#2 AISBV is open
ANTI-ICE ON

#2 ENGINE
STARTER
P-2.5 or APU or EXTERNAL #2 start valve open, all #2 start
relay functions are active.
START RELAY
#2 START(disables heat
RELAYduring start)

During crossbleed start, an 18% loss of MTA will
(K-26)
AIR SOURCE
HEATER MIXING VALVE
be realized on the air source engine. Not cumalative
HEAT / START

Nr  #1 START
with heater & A/I because they're deactivated during
RELAYCOCKPIT
ENG3
HEATER

(K-45)
engine start (a start relay function).
O
CONTROL
MED
INPUT
F
F
O

DC PRI BUS  FF APU

ON OFF HI

solinoid
4% loss of MTA when heater
4 is active. (If only one engineis operating, a 4% loss of
#1 ENGINEMTA will be realized on thatAPU START/BYPASS VALVE
STARTER
AGB
(Turbomach APU only) fuel
engine. With two engines
(see note #4) between the two engines.)
operating the loss is shared
　
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