Installation
P/N 06-237041-001 2-15 February 2011
2-4.6 Making AC Power Source and Earth Ground Connections
The FenwalNET 8000-ML control unit uses commercially- or end-user-provided AC power as the
primary power source, together with 24 Vdc standby batteries (when required by local codes and/or
Authority Having Jurisdiction [AHJ] requirements). The primary AC power for the FenwalNET 8000-
ML control unit is shown in Table 2-1.
Note: The default power configuration is 120 Vac and will require resetting for 220/240 Vac
operation. Configuration of primary AC power requires that the AC power-selection switch on
the side of the power supply unit be set correctly before it is installed in the enclosure. Refer
to Figure 2-4 for switch location.
The FenwalNET 8000-ML System requires a separate, dedicated connection to an AC branch circuit
that must be labeled “Fire Alarm.” This branch circuit must connect to the line side of the main power
connection for the premises. No other equipment can be powered from the fire-alarm branch circuit.
The branch-circuit wire must run continuously, without any disconnection devices from the source
of AC power to the FenwalNET 8000-ML control unit. Over-current protection for this branch circuit
must be limited to 15 Amp maximum and comply with Article 760 of the National Electric Code, in
addition to any other local electrical codes. Use a minimum wire size of #14 AWG with 600-volt
insulation for this branch circuit. Use a grounded power cord of #14 AWG or larger wire with 600
Vac rating to make the AC power connection to the control unit.
Follow the procedure below to make PMU Board AC Power and Earth Ground connections:
1. Run AC-input wiring to the right side of the enclosure and bring it through one of the top
knockouts on the right. Refer to Figure 2-12 for AC power connection locations.
2. Connect the other end of the PMU ground wire assembly (installed previously onto the
PMU Board with a standoff) to the Earth Ground stud located at the right side of the
enclosure.
3. Connect the earth-ground (green) wire to the Earth Ground stud located at the right side
of the enclosure.
4. Connect the hot (black) wire to the PMU Board Terminal Block TB1 labeled ‘L’ (Line).
5. Connect the neutral (white) wire to the PMU Board Terminal Block TB1 labeled ‘N’
(Neutral).
6. Locate the AC Voltage Protection Cover found in the hardware kit. Install the cover over
the AC power input terminals and fasten to the 5/8-in. standoff with the provided 8/32”
Phillips mounting screw. Note that the standoff needs to be installed prior to this step.
7. Locate the 5-inch. MCB ground wire assembly from the hardware kit.
8. Connect one end of the MCB ground wire assembly to the Earth Ground stud located at
the right side of the enclosure. Leave the other end dangling.
Table 2-1. Primary AC Power Input
1 Power Supply Unit: 2 Power Supply Units:
120 Vac, 50/60 Hz, 3.2 A 120 Vac, 50/60 Hz, 6.4 A
240 Vac, 50/60 Hz, 1.6 A 240 Vac, 50/60 Hz, 3.2 A
WARNING
Ensure that the dedicated AC circuit is shut off at its source before beginning this
procedure.
CAUTION
For proper ground fault detection, all mounting screws should be installed.
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