Radome Environmental Control Unit
INSTALLATION PROCEDURES
L-2283 ENGLISH
3
INSTALLATION PROCEDURES
This section covers the installation procedures for internal and external Radome ECU systems.
Read the manual completely
before attempting to install any equipment.
I
NTERNAL
U
NITS
1.
If you are installing an internal Radome ECU, select a location in the dome that will not interfere with the antenna.
2.
Internal units must be accessible and have a clear area below the dome for condenser openings. There must be
adequate space for air flow underneath the dome pedestal.
3.
Use cutout template (see “Template For Interior Unit” on page 16) to mark and then cut openings in dome floor. Drill
holes for mounting as per template.
4.
Ensure that intake and discharge condenser air streams are separated with a divider so that air does not short-cycle
from exhaust to intake.
5.
Position the Radome ECU over openings and fasten unit using hardware provided. Ensure foam seals are tight
between ECU and mounting surface and there are no leaks from outside.
6.
Make electrical connections as described in “Electrical” below.
7.
Use a diverter to position cool-air discharge away from the antenna.
E
XTERNAL
U
NITS
1.
If you are installing an external Radome ECU, select a location near the dome to keep evaporator ducting as short and
straight as possible. Ensure that condenser openings can be clear from obstacles.
2.
Mount unit to deck using hardware provided.
3.
Install evaporator return and supply ducting to dome. Ensure that ducting is taught, secure, and as straight as possible
to minimize bends. Use insulated ducting to reduce heat gain to dome.
4.
Make electrical connections as described in “Electrical” below.
5.
Position the Passport I/O Compact digital display inside the dome in a location that will sense dome temperature. To
avoid short-cycling, do not place near the supply-air stream into dome .
6.
Use a diverter to position cool-air discharge away from the antenna.
E
LECTRICAL
1.
Turn off the A/C’s power-supply circuit breaker before opening electric box.
Each A/C unit requires its own
dedicated circuit breaker. Use the correct size circuit breaker to protect the system as specified on the Radome ECU’s
data plate label.
2.
Remove the electric box panel to access the circuit board and the terminal strip mounted on it.
3.
The terminal strip is labeled for proper connections of the electrical supply and ground wires (see “Wiring & Product
Diagrams” on page 12). Make these connections. All connections shall be made with solderless terminals.
THE DIGITAL CONTROL
The Passport I/O Compact is a digital control that displays current temperature and operating mode, and is also used for making
programming changes that affect system operation.
The control has nonvolatile memory requiring no batteries or backup power. When power is lost, the operating parameters are
retained indefinitely. When power is restored, the control resumes operation as last programmed.
See Figure 1 and Table 1 on page 4 to identify all parts of the control.
I
NDICATORS
A
ND
B
UTTONS
C
OOL
M
ODE
I
NDICATOR
Lights when the compressor is running in Cool Mode or in Automatic Mode while cooling. Automatic Mode is only used if
optional electric heat is installed.
