Robertshaw 8405-1 - Manual (Page 6)

13. Make sure wire connections are secure.
14. Push excess wire back through opening.
15. Set the Electric/Gas switch to either GAS for a gas/oil heating
system or ELEC for an electric/millivolt heating system (Figure 5).
16. Install two AA Energizer ® brand batteries or equivalent into
battery compartment as shown (Figure 5).
17. Replace thermostat cover by snapping into place.
6
RC
RH
G O B Y1 W1 ELEC GAS
° F
+
–
+
–
Figure 5
TERMINAL LEGEND - 8405
TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION
Rh 24VAC hot connection Yes For input of 24VAC hot
side of heat transformer
Rc 24VAC hot connection Yes For input of 24VAC hot
side of cool transformer
W1 Heat connection Yes* Energizes on a call for
heating
G Indoor fan connection Yes Energizes with Y1 & W1
terminals or with FAN
option switched to the
ON position
Correct battery
placement
ELECTRIC/GAS SWITCH
Selects fan control.
110-1161.qxd 6/9/05 10:41 AM Page 6