FM90 - Field Control® Fresh Mist Central System Humidifier

Freshmist 90
Owners Manual
Humidistat- Wall Mount

Wall mount

1. Remove knob and cover from humidistat. To remove cover, place screwdriver blade in slot at side of humidistat and twist.
   
2. Convert humidistat for wall mounting by removing control unit from back plate. Reassemble control unit to back plate as illustrated in (Fig. 22) with spacers to rear and shaft forward. Remove electrical disconnect by cutting the (2) wires. Strip ends 1/2" for splicing to wall wire.
   
   NOTE: Shaft extension is not required for wall mounting.
   
3. Select a location on a convenient inside wall, usually beside your furnace thermostat.
   
4. Run low voltage wire through the wall. Exit hole must be within the lower back plate opening. (Purchase additional wire as required.)
   
5. Connect low voltage wires from wall to previously cut leads on humidistat by stripping ends and using wire nuts (not provided). Position and fasten humidistat to wall with 4 Screws provided. install cover by snapping onto back plate. Press knob onto humidistat shaft. Make sure 1/8" air space is maintained between wall and back plate to allow air circulation and humidity sensing.
   
6. Connect wiring (Fig. 23). Remove electrical disconnect by cutting wires on harness, strip ends and splice to low voltage wire from wall humidistat using wire nuts. (Wire nuts not provided.) Plug 24 VAC transformer into 120 VAC outlet. Do not use existing transformer on furnace.
   

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