Temperature Control; General; Normal Mode; Standby Mode - BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual

TEMPERATURE CONTROL

COCKPIT HEAT
ON
COCKPIT
OFF
STANDBY
NORMAL MAN
40 CABIN
TEMP
20
°C
-40
0
-20
TEMP
COLD HOT
Figure 11-1. Temperature Control Panel

NORMAL MODE

In the normal mode of operation, the temper-
ature controller receives inputs from the fan
sensors and the duct sensors, representing ex-
isting temperatures in these areas. The signals
are compared to the position of the tempera-
ture selectors and, when necessary, the con-
troller signals the temperature control valve
to modulate and mix hot air with the air con-
ditioner output air to produce the selected
temperature in the areas. High and low tem-
perature limiters keep duct temperatures within
limits. The temperature range in the normal
mode is from 15°C (60°F) to 32°C (90°F).

STANDBY MODE

The standby mode is similar except, when se-
lected, the fan sensor is removed from the cir-
cuit and now the duct temperature alone is
compared with the position of the temperature
selector.
In this mode, the temperature range is from 2°C
(35°F) to 82°C (180°F).

MANUAL MODE

In the manual mode of operation, the fan sen-
sors and the duct sensors are both removed
from the circuit and the temperature selector
CABIN
STANDBY
NORMAL MAN
TEMP
COLD HOT
FOR TRAINING PURPOSES ONLY
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CL-600-2B16 PILOT TRAINING MANUAL
output signals are directed to the affected tem-
perature control valve.
The temperature range in this mode extends
from a low of 2°C (35°F) to a high of 99°C
(210°F). Frequent adjustment will be neces-
sary to maintain a comfortable temperature,
particularly when altitude or power settings
are changing.
The manual mode is selected if (1)
the normal and standby modes are in-
operative or (2) the crew wishes to
make large and rapid temperature
changes. When this desired change
is achieved, the temperature con-
t r o l s a r e t h e n r e t u r n e d t o t h e
normal position.

VALVES

GENERAL

Operation of the air-conditioning system is
controlled by electropneumatic valves.
ENGINE BLEED-AIR VALVES
The normal airborne air source is engine bleed
air from each engine compressor. This is di-
rected into the bleed-air manifold through the
left and right engine bleed-air shutoff valves.
(See Chapter 9, "Pneumatics.")

ISOLATION VALVE

The normally closed isolation valve may be
opened by pushing the ISOL switchlight on the
bleed-air control panel, thus allowing bleed air
from one engine to supply the entire pneu-
matic manifold.
NOTE
CL 601-3R 11-3
L t é e
L t d .