Honda Aircraft Company
HA-420
SYSTEMS
POM
DESCRIPTION
HJ1-29000-005-001
October 30, 2016
1-133
Indications
HPRSOV status as well as manifold temperature and pressure can be
observed on the ENVIRONMENTAL synoptic page.
ENVIRONMENTAL CONTROL SYSTEM
A FCSOV regulates the conditioned bleed air from the Bleed Air Supply
flow to either approximately 3 pounds per minute (ppm) or
approximately 5 ppm depending on whether low or high flow condition
is required. A solenoid function on the FCSOV will close the valve if
commanded. The FCSOVs can be closed by selecting the associated L
CABIN INFLOW or R CABIN INFLOW switch to OFF.
From the FCSOVs, conditioned bleed air is ported to two Temperature
Modulating Valves (TMV), and the HXP. Each TMV has two bleed air
inlets and one outlet. The inlets are controlled together such that at least
one inlet is always fully open (and the other closed) or the two inlets are
partially open. One of the ports is supplied with hot bleed air directly
from the FCSOV, the other port is supplied with cooled bleed air from
the HXP.
FOR TRAINING PURPOSES ONLY
