An Easy Guide to Selecting the Ideal Location for Your Millistat
 
1.  Select an easily accessible partitioning wall.  (Not an outside wall.)
2.  Choose a location about 5 feet above the floor with a free flow of air.
3.  Do not expose to direct sunlight or radiation from lamps, fireplaces, or other light sources.
4.  Avoid locations close to, or in the direct path of, heat from radiators or warm air registers.
5.  Avoid locations close to doors that lead outside, windows, or adjoining outside walls.
6.  Make sure there are no pipes or ductwork located in the wall directly behind your chosen thermostat      location.
7.  Avoid rooms that are frequently warmer or cooler than the rest of your home, such as kitchens, hallways, or unused rooms.  Also avoid placement on the opposite side of the wall from such rooms.
8.  The living room or dining room is normally a good location, provided there is no cooking range or refrigerator on the opposite side of the wall from your Millistat.
 
Simple 4-Step Installation
 
 1.  Remove Millistat cover by firmly holding base and pulling outward on cover.
 2.  Level top of Millistat base and mark hole locations for mounting screws.  If surface-mounting thermostat, cut out the appropriate knockout to allow for wire entry behind base.
 3.  Attach wires to screw terminals on back of Millistat base.  Push excess wire into wall or switchbox.  Plug hole so drafts inside wall will not affect thermostat operation.
 4.  Secure Millistat base to wall with the two screws provided.  Tighten mounting screws securely and snap on cover.
 
Millistat Wiring
 
In 250/500 millivolt installations, use No. 14 wire and keep the wires as short as possible. Keep this in mind when selecting the Millistat location.
 
In 750 millivolt applications, see the table below to determine the maximum wiring run.
 
Wire Size       Max Length              Max Combined Length
                      2-wire cable            2 single wires
 
No. 18           30 ft     9.0 m          60 ft  18.0 m
No. 16           50 ft   15.0 m         100 ft  18.0 m
No. 14           80 ft   24.5 m         160 ft  49.0 m
 
To ensure the proper low resistance circuit, wire connections must be clean and tight and use a solid copper conductor. 
 
Note: Use in 24V systems may degrade performance.