FM90 - Field Control® Fresh Mist Central System Humidifier

Freshmist 90
Owners Manual
Installation - water supply

Installation
WATER SUPPLY

NOTE: Tubing must not contact flue pipe or hot air plenum.

1. Water for the humidifier must be taken from a nearby cold water line. Do not use any line connected to an air conditioner. Turn off the water supply. Drain by opening a faucet at a lower level of the line.
   
2. Position the saddle valve on the water line as close to the humidifier as possible. You have been supplied with 10 feet of 1/4” plastic tubing.
   
   SPECIAL NOTE: When measuring the distance from the saddle valve location to the humidifier, keep in mind that the tubing must be supported; therefore, it must run along ceiling and walls. Measure along the path the tubing will follow.
   
3. Back out the piercing pin by turning the ‘T’ handle counter clockwise and then clamp the saddle valve body securely on the water line with rubber gasket positioned as shown (Fig. 15). On galvanized or copper pipe over 5/8”, first drill a 5/32” hole.
   
   CAUTION: For safety, use a hand drill or grounded electric drill.
   
4. Turn handle clockwise until it has pierced the water line and valve is completely closed (Fig. 15).
   
5. Partially uncoil the tubing. Slide the brass compression nut over the tubing. The threads in the nut must face the tubing end. Place brass compression sleeve as shown in Fig. 15. Slip brass insert into end of tubing.
   
6. Insert the tubing end into the saddle valve at threaded “A” (Fig. 15) as far as it will go. Thread the brass compression nut onto the valve, then tighten gently with a wrench. Take care not to over tighten the nut.
   
7. Unwind the rest of the tubing. Take care not to kink it. Run the tubing along flat surfaces to the humidifier. Sup port the tubing as needed to avoid contact with furnace.
   
8. Close previously opened faucet. Turn on main water supply. Place a pail under the end of the tubing. Open the saddle valve. Flush the line. Make sure there are no leaks along the line or at the valve. Turn valve off.
   
9. Complete installation of water supply by first sliding plastic compression nut onto the water supply tubing. Insert brass insert into the end of water supply tubing. Insert the tubing into humidifier valve body, making sure it is fully seated. Tighten plastic nut securely, finger tight (no wrench) (Fig. 16).
   
10. Install reservoir, making sure overflow drain is on left side. Install media wheel. Be sure that media wheel is property engaged with the media motor and that media wheel shaft is in groove in plastic bearing (Fig. 17).
    
11. Install float assembly. Place float assembly on valve body; align hole. Slide pivot pin through holes to fasten. Float should have slight up and down movement (Fig. 18).
    
12. Open saddle valve and allow reservoir to fill. Check water level (Fig. 19). If adjustment is necessary, turn off water and remove float assembly. See instructions on bottom of float. To raise water level, turn float clockwise viewing bottom of float. Water should be 9/16” below the top edge of the reservoir.
    
13. Lower top cover. Install plastic front cover by inserting top edge up under top cover front flange, with side flanges outside casing. Swing bottom of cover in against case and lower down against flange.

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