Commissioning Procedure; Testing Loop Integrity (Power Cables) - Baldwin Boxall OmniCare Installation Manual

C O M M U N I C A T I O N S
4.4 C

4.4.1 Testing Loop Integrity (Power Cables)

OmniCare issue 1
OMMISSIONING
C
A U T I O N
Before applying power to a loop ensure the "0V Continuity
Check" described in Section 4.3 has been successfully completed.
Ensure Mains Power and batteries are disconnected before
connecting or disconnecting Loop Cables.
It is recommended to test each ring of the system individually, so
initially ensure all circuits are disconnected from the Panel.
1. At the Master Panel, connect the end of the first loop circuit
to the "A" terminations (refer to Figure 2.2 on page 14).
Ensure the unconnected cables at the other end of the loop
are suitably positioned to prevent short circuits.
N : If the "B" connections are also made during commissioning the
OTE
panel will automatically route data and power around the ring. This
makes diagnosis of any cable faults much more difficult.
2. Connect the Mains Power, but do not connect the batteries.
3. Press the "FAULT ACCEPT" button to accept the faults and
silence the buzzer.
4. Using a voltmeter, check the voltage across the "+V" and
"0V" terminals on the "A" circuit is approximately 30V DC.
Wait for 10 seconds and then check the return voltage on the
"+V" and "0V" cables ("B" circuit) is higher than 22V DC.
N : The actual return voltage depends on the number of Remote Units
OTE
and the cable length of the loop.
C
A U T I O N
If the reading on the return cables is less than 22V DC then power
is not being fed along the loop.
Investigate the +V loop wiring before proceeding.
5. If the reading is higher than 22V DC then the loop integrity
of the power conductors is confirmed.
P
ROCEDURE
OmniCare EVC System
Installation & Commissioning Manual
49