Field Controls Tm-90r Owner's Manual
TM-90R/TM-2000 HUMIDISTAT INSTALLATION INSTRUCTIONS
CAUTION: DISCONNECT THE TM-90R/TM-2000 TRANSFORMER FROM THE
RECEPTACLE AND SWITCH "OFF" THE FURNACE ELECTRICAL
SUPPLY PRIOR TO INSTALLING THIS HUMIDISTAT.
1. Remove Humidity Control from front side of Base Plate and re-
attach to back side of Base Plate. The Adjustment Knob must
protrude through the hole in the Base Plate. (Figs. 1 & 2)
2. Attach Shaft Extension to
Humidity Control Adjustment
Knob. (Fig. 3)
3. Place Mounting Template on
a smooth, vertical surface of
the furnace return air plenum.
This location should be close
enough to the TM-90R/TM-2000
housing that the 10' length of
2-conductor thermostat wire
can be connected to each
device and secured along the
length. Follow all Template
Instructions. (Fig. 4)
4. Cut away the plastic
material which partially
covers the wiring slot on the
base plate. (Fig. 5)
5. Refer to the Wiring Diagram and attach the wires to the
Humidity Control terminals #2 and #3, both Transformer
terminals and both TM-90R/TM-2000 terminals, as indicated.
The Wiring Diagram shows the proper wire termination
required for each connection.
CAUTION: All wiring should conform to The National Electrical
Code, NEC, and any applicable local codes.
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