Specifications

Halogen Gas Monitor – MultiZone Remote Display
Instruction 3015-5157 13
Electrical Wiring
The HGM-RD uses a universal power supply that is capable of accepting inputs of 100 to 230 VAC, 50/60 Hz.
The monitor’s power consumption is 25 Watts. It is highly recommended that the monitor be connected
directly to the AC power source, preferably on its own circuit. The AC power connection should be completed
with UL approved 3-conductor wire (14−18 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/blue) and live (black/brown) 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.
WARNING: Electrical installation should be performed by a certified electrician, and
should comply with all applicable NEC/CEC and local electrical safety codes.
WARNING: Copper conductors for connection to supply mains must be made in
accordance with NEC/CEC and local 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.
CAUTION: Drilling holes in the HGM-RD enclosure may damage the unit and will
void the warranty. Please use knockouts provided for electrical connections.
A switch or circuit breaker rated 1.0 A, 250 VAC must be attached to the monitor’s AC power leads. This
switch must also be located in close proximity to the monitor, and be in easy reach of the operator. This
switch should also be clearly marked as the monitor’s main AC disconnect device.
HGM-RD AC Input Power and Ground Connections