Unique Broadband Systems Ltd. DRU1KW Manuel D’Utilisation

 

 

The replacement air-to-air heat exchanger/heater should be installed in HB cabinet or LB 
cabinet in the following sequence: 

 

1.  Before the replacement air-to-air heat exchanger/heater is installed, ensure that the 

weatherproof gasket is placed on the side of the air-to-air heat exchanger/heater that 
will rest against the side of the cabinet – see Figure 6-11. 

2.  Using two handlers, one located on each side of the air-to-air heat exchanger/heater, 

carefully lift the air-to-air heat exchanger/heater and place it in the opening in the 
side of the cabinet. 

3.  Replace the twelve (12) 1/4-20 socket head cap screws (with 1/4” flat washers and 

gaskets) which secure the air-to-air heat exchanger/heater to the cabinet – see Figure 

  A torque rating of 45.6 Inch Lbs. must be used to tighten the screws.

 

4. 

Install four (4) cable tie mounts on the air-to-air heat exchanger/heater inside panel 

5.  Secure the two (2) temperature sensor cable assemblies (ELECTR COMP AIR INTAKE 

and ELECTR COMP AIR EXH) to the cable tie mounts located on the air-to-air heat 
exchanger/heater inside panel – see Figure 6-9. 

6.  Re-connect the 8-pin pluggable terminal block to the air-to-air heat exchanger/heater 

inside panel 8-pin terminal block receptacle – see Figure 6-9. 

7.  Switch ON the HE circuit breaker (CB 5), located on the HB cabinet PDU or LB cabinet 

PDU. 

8.  Close the electronics compartment front and rear doors. 

 
 

 
 
 

 
 

 
 

 
 

 
 
 

 
 

 
 

 
 

 
 
 

 

SX03-20000-01-M01 6-25