Electrical Wiring - Bacharach HGM-SZ Installation & Operation Manual

2.6. Electrical Wiring

The SZ unit uses a universal power supply that is capable of accepting inputs of 100 to 240 VAC,
50/60 Hz. The monitor's power consumption is 15 Watts (maximum). It is highly recommended that the
monitor be connected directly to the AC power source, preferably on its own circuit. The connection
should be completed with UL listed multi-conductor wire (minimum 16 AWG), rated 300 VAC at 105°C.
Locate a convenient service knockout and install electrical conduit in the typical manner. Locate the AC
Input Terminals and Ground Stud on the inside of the monitor (page 11). Secure the incoming AC power
neutral (white) and live (black) wires to the LINE 1 and LINE 2 terminals.
Using the supplied crimp-on ring terminals, washers, and nuts, connect the incoming AC power ground
wire (green) to the monitor's AC Input Ground Stud, and then install a separate wire between the ground
stud and the GND terminal.
Using the supplied crimp-on
ring terminals, washers, and
nuts, connect the incoming
AC power ground
(green) to the monitor's AC
Input Ground Stud, and
then install a separate wire
between the ground stud
and the GND terminal.
A switch or circuit breaker
rated 1.0 A, 250 VAC, with
a minimum terminal spacing
of 3.0 mm must be attached
to the monitor's AC power
leads. This switch must also
be located in
proximity to the monitor,
and be in easy reach of the
operator. This switch should
also be clearly marked as
the monitor's main
disconnect device.
WARNING: Electrical installation should be performed by a certified electrician, and should
comply with all applicable NEC/CEC and local electrical safety codes.
WARNING: The AC power ground wire must first be connected to the monitor's ground
stud. Under no circumstances should this monitor be operated without a protective ground.
Doing so poses a potential shock hazard, and is also a violation of electrical safety
standards applicable to this type of equipment.
WARNING: Copper conductors for connection to supply mains must be made in
accordance with NEC/CEC and local codes.
CAUTION: Drilling holes in the SZ enclosure may damage the unit and will void the
warranty. Please use knockouts provided for electrical connections.
P/N: 3015-4256 Rev 13
wire
close
AC
Figure 2-7. AC Power Connections
Single Zone Gas Monitor
13