GatesAir Inc. ULXATSC Manual De Usuario
2/19/10
888-2715-001
1-19
WARNING: Disconnect primary power prior to servicing.
Section 1 Introduction
Maxiva ULX ATSC Series
User Manual
Figure 1-11 Heat Exchanger (before installation)
NOTE:
The heat exchanger shown in Figure 1-11 is a 2 fan unit. It is shown on a shipping
pallet. The two fans that are shown pull air up through the cooling coil/fins (not
visible in the photo) if unit if mounted horizontally (as shown). This unit can be
mounted horizontally or vertically depending on how the legs are attached to the
heat exchanger. Smaller transmitters may use only one fan.
pallet. The two fans that are shown pull air up through the cooling coil/fins (not
visible in the photo) if unit if mounted horizontally (as shown). This unit can be
mounted horizontally or vertically depending on how the legs are attached to the
heat exchanger. Smaller transmitters may use only one fan.
1.2.8.2.1 Heat Exchanger Fan Control
Units with two fans offer redundancy. In multi-cabinet transmitters there will be one
heat exchanger and control panel/pump module per PA cabinet. The fans are controlled
electronically. The fans are enabled whenever the pump module is activated, but the
controller temperature set point, in degrees C, and the proportional band setting, in
degrees C, determines when the fans will actually start. With the controller temperature
set point at 32
heat exchanger and control panel/pump module per PA cabinet. The fans are controlled
electronically. The fans are enabled whenever the pump module is activated, but the
controller temperature set point, in degrees C, and the proportional band setting, in
degrees C, determines when the fans will actually start. With the controller temperature
set point at 32
o
C and the proportional band setting at 5
o
C, the first fan will turn on when
the coolant discharge temperature reaches 32
o
C, with the second fan turning on at 37
o
C.
As the coolant discharge temperature drops the fans will be turned off.
1.2.8.2.2 Pump Operation/Control Logic
Pump operation is automatically controlled using a programmable interface device
controller (PID). There are two modes of pump operation, "LOCAL" and "REMOTE".
The PID controller interfaces with the pump control interface (PCI) located in the TCU.
The PLC controller receives and sends signals to the transmitter PCI. With "LOCAL"
controller (PID). There are two modes of pump operation, "LOCAL" and "REMOTE".
The PID controller interfaces with the pump control interface (PCI) located in the TCU.
The PLC controller receives and sends signals to the transmitter PCI. With "LOCAL"