RJ150-30 / Operations and Maintenance Manual
Mobile Aircraft Air Conditioner
Trailer Mounted, Cool Mode Only
______________________________________________________________________________
SECTION 1 - 1
JANUARY 20, 2004
PAGE 14
Figure 7
Item No.
Description
Function
9
Cooling Temperature Display
Module (TDM2)
Displays ambient air temperature sensed by the ambient
air Remote Temperature Detector (RTD-2) sensor
probe. Pressing push button on unit will display ETC2
setpoint.
10
Cooling Mode Position
Reference Potentiometer (P1)
Airflow control. Sets the position of the airflow damper as
a percentage of open (maximum flow).
Factory setting: 70% open.
11
Fuse (FU4)
Protection for damper motor actuator circuitry.
Rating: 1 A
12
Time Delay Relay (TDR1) -
Defrost Timer
Provides timing control for compressor defrost cycle.
Upper timer sets defrost cycle frequency. Normally set to
one (1) hour.
Lower timer sets defrost timer duration. Normally set to
1.5 minutes.
13
Voltage-Phase Monitor (PM1)
When configured for use, provides generator output
surveillance for voltage and phase loss. Integral contact
(s) close when acceptable voltage and phase rotation
are established.
14
Fuse (FU3)
Over load protection for phase monitor (PM1).
Rating: 10 A
15
Fuses (FU1, FU2)
Over current protection for control transformer (T1).
Rating: 2 A
16
Control Transformer (T1)
Steps down genset power from 460-480VAC to 24 VAC
(control voltage) to energize motor starters, contactors
and relays.
I. Operator Controls:
(1) Genset Controls:
The Genset Control Panel (See Figure 2) is mounted above the generator
junction box in the forward end of the unit. Access is gained through
opening the forward left genset access door. This panel contains the
electrical components and control circuitry to start and monitor the
engine/generator set for normal, emergency and maintenance operations.
Refer to Section 1-2, Operating Procedures. Detailed descriptions are
contained in the appropriate Supplemental Technical Manuals:
•
RJ150-CUM-01: Cummins/Marathon Engine/Generator Set
•
RJ150-CUN-01: Cummins/Newage Engine/Generator Set
•
RJ150-DZM-01: Deutz/Marathon Engine/Generator Set
•
RJ150-PKM-01: Perkins/Marathon Engine/Generator Set
