Nautel NX50, Installation Manual

Page: 14 / 74

NX50 Installation Manual Unpacking and positioning
Page 2-2 Issue 6.1 2021-07-13
5. Cover the top of the transmitter, using a plastic sheet or suitable equivalent, to prevent
debris and hardware from falling into the transmitter. Keep the sheet on the
transmitter until Section 9, “Commissioning tasks” on page 9-1 .
6. The transmitter is factory configured for open loop cooling however, if you are using the
optional closed loop cooling configuration (see the NX50 Pre-Installation Manual for
details), follow the installation steps below:
• Obtain the cover plate (Nautel Part # 207-8211) packed with the ancillaries.
• Remove the nine (9) M4 screws that secure the filter brackets to the rear door and
remove the air filter and brackets (see Figure 2.1 on page 2-4 ).
• Install the cover plate using the screws from the previous step in place of the removed
brackets.
• Remove the top cover plate (see Figure 2.1 on page 2-4 ) to uncover the intake grill
necessary for the ducted incoming air
7. Open the front door of the transmitter, remove and retain the 23 M5 screws from the hinged
filter door (see Figure 2.2 on page 2-5 ). Unlock and open the filter door to gain access
to the inside of the filter section.
8. If you purchased the optional key sequence interlock system, install the antenna ground
switch on top of the transmitter cabinet as follows (see Figure 2.3 on page 2-6 ):
• Locate the antenna ground switch (Nautel Part # 207-8320 - 04), and its securing
hardware, that was packed with the ancillary crate for shipping.
• Remove any protective wrapping from the antenna ground switch and position it
on top of the transmitter cabinet, noting proper orientation and that the aluminum rod
protruding from the bottom of the antenna ground switch must pass through a clearance
hole in the transmitter cabinet.
• Temporarily remove the right-hand side cover (as viewed from the front) from the
antenna ground switch, to allow access to the securing hardware. Using the
hardware packed with the switch, secure the antenna ground switch to the top of
the cabinet using 4 sets of M6 hardware (. Secure the aluminum rod to the output plate
using an M10 button-head cap-screw, split washer and flat washer, also packed with the
switch. Torque hardware to 140 in-lbs.