Bosch 24VDC Operation And Installation page 5

Connect power to the 120 VAC input terminals, following these steps:
1. Remove the knockout and install appropriate hardware for connection to conduit.
2. Remove the protective terminal cover marked CAUTION 120 VAC.
3. Pull the 120 VAC Power wires through the conduit hardware installed in the knockout.
4. Connect the wires as marked on the board.
5. Replace the protective cover over the 120 VAC Input terminals.
120 VAC Fuse
The 120 VAC fuse (F1) is located on the lower right-hand corner of the D9142F, above the 120 VAC terminals (see
figure 3). Fuse F1 protects the D9142F and D1601 from damage due to power surges or over loads.
Fuse F1 is a type 3 AG, 4 Amp, 250VDC slow blow fuse.
Danger: Turn off the 120 VAC circuit breaker before testing or replacing Fuse F1. Leaving the 120 VAC circuit
breaker on can cause injury or death by electrocution.
If the green AC power LED is off, the 120 VAC circuit breaker is in the ON position, and the building lights and other
electrical devices still operate, Fuse F1 may be open. To replace the fuse, follow these steps:
1. Turn OFF the 120 VAC dedicated circuit breaker.
2. Remove the protective cover from Fuse F1.
3. Pull the fuse from the socket.
4. Using a Volt/Ohm meter verify the 120 VAC has been removed and then test the resistance of the fuse. If
5. Insert the fuse into the F1 socket.
6. Replace the protective cover.
7. Turn the 120 VAC circuit breaker ON.
8. Observe the green AC power LED should be ON.
© Bosch Security Systems, Inc.
the fuse is open, replace with a new fuse matching Fuse F1's specification. If the fuse is closed, the
problem may be elsewhere. Call a licensed electrician to troubleshoot any electrical problem.
D9142F Operation and Installation
Figure 3: 120 VAC Fuse
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