Positron Teleline 751960/13CU5, Description And Installation Manual

Page: 43 / 58

43
Ground Wire
through the interface block. These modules are installed to prevent damage to the
Teleline module in the event that an unbalance voltage condition appears across
the tip and ring conductors of a station cable pair. In the event one of the protector
modules fails, it will fail shorted to ground and should be replaced.
3.9.3 Testing Environmental Equipment
A functional test of the fan and heater can be done by changing the operating
setting on the thermostats. Record the current temperature setting levels as that is
the optimum levels for proper control of the cabinet temperature.
Q
The heater should be set at: 10
◦
C + 2
◦
C (50
◦
F + 5
◦
F)
Q
The fan should be set at: 35
◦
C + 2
◦
C (95
◦
F+ 5
◦
F)
Functional tests on the circuit modules should be done utilizing the methods
described in the envelope marked for the respective unit.
3.9.4 Teleline Lightning Arrestor model 751125
This unit has been installed into this cabinet and correctly wired to the ground bar
as designed. The cabinet #6 ground wire must be connected to the grid ground
connection as instructed in section 3.9 on page 42.
Q
See the instructions in section 3.8 on page 35 for correct connection
procedures.
Q
Additional information may be found in the documentation found in the
envelope marked #751125 for this unit.