The limit is a high temperature safety limit i guess.
White rodgers fan center wiring diagram.
37 5786a 9716 this control must be installed by a qualified installer.
Features an energy limiting class ii transformer design and color coded pre stripped leads.
The explanation is for a honeywell fan limit control but it seems similar enough to the white rodgers device i an using.
White rodgers division emerson electric co.
9797 reavis road st.
Thermostat wiring details connections for the white rodgers brand of room thermostats.
Click to enlarge any image adapted from the white rodgers 5d51 installation instructions cited here.
Ok i read a little on the fan limit control concept.
Thru fan control center.
White rodgers 90 113 single pole double throw spdt fan control center is a transformer and relay combination for easy installation on a 4 x 4 junction box.
I looked on this page and found the following diagram.
Includes low voltage connections on terminal board.
Transformer and relay combination for easy installation on a 4 x 4 junction box.
The original heater diagram shows one side black v but i can t figure where black from relay goes where the black for transformer goes 3 wires in that.
Do not use on circuits exceeding specified voltage.
Line voltage connections are pre wired.
I m replacing a white rodgers fan control on my furnace.
Fan control centers printed in u s a.
Wiring diagram for the white rodgers fan limit control used at line voltage.
Wiring diagram for the white rodgers fan limit control used with low voltage equipment.