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Installation

Alerton Microset™ II

Mounting

The Microset II is designed to be wall-mounted indoors, with dimensions ideal for mounting to a single-gang electrical box. Mount in a clean, dry location away from windows, air ducts, and other places where environmental factors may affect temperature and humidity readings.

Note	If you mount the Microset II on the interior of a outside wall, thoroughly insulate so outside air behind the sensor doesn't affect the sensor reading.

Compliance with the Americans with Disabilities Act

To meet requirements of the Americans with Disabilities Act, mount no higher than 48“ from the floor and with a minimum clear floor space of 30” X 48“ (760 X 1220 mm).
	Figure 1 Mounting guidelines for compliance with Americans with Disabilities Act (ADA)

Backplate mounting dimensions

	The Microset II ships with the backplate on backwards to make it easier to remove during installation. Two screws attach the backplate to an electrical box, mud ring or other mounting surface.
Figure 2 Backplate mounting dimensions

Securing the Microset II to a surface

1 Remove the backplate from the Microset II and the wiring pigtail
2 Flip the backplate so the smooth side faces the mounting surface
3 Rethread the wires through the center knockout on the backplate
4 Use wire nuts or other connectors to splice the Microset II wires to the wire run from the VLC (see “Wiring” for details)
5 Secure the backplate to the mounting surface with the enclosed screws or you own
6 Hold the Microset II at an angle above the backplate and then slide it down. The two tabs on the inside top edge of the Microset II shold fit into the tab slots on the backplate.
7 Push the bottom of the Microset II onto the backplate legs until they snap securely on the tab stops

Figure 3 Mounting the Microset II to a surface

Caution

Do not crimp or kink the pigtail wires

Remove the Microset II from the backplate

1 Insert a thin, flat-tipped screwdriver into the last vent slot on the bottom of the Microset. Position the screwdriver so that you can apply pressure to the backplate leg (see below).
2 Firmly depress the backplate leg until it is clear of the tab-stop on the Microset II.
3 Gently pull the freed corner of the Microset II away from the wall.
4 Repeat steps 1–3 on the other side.
5 Push upward on the bottom of the Microset II until it is completely free of the backplate.

Wiring

Wire specifications

Type: 18-22 AWG, shielded
Length: ≤1000 ft
Resistance: <12Ω

VLC wire connections and terminations

The Microset II has a three-conductor connection to the VLC.

Wire color	VLC terminal	Diagram
Black	IN0 / MSET
White	COM
Orange	24vAC or 24vDC
The orange lead powers the backlight display. It is optional. Backlighting is disabled when it is unterminated. Connecting to a VLC terminal is preferred, but the orange lead may connect to any point on the VLC source. Do not connect to a 24VAC/VDC source that does not have common ground with the VLC.

Note	Do not run Microset II wire in the same conduit or next to building power cables. This can cause interference. If it is necessary to cross power cables, lay the wire at a right angle (90º).

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