Terminal Function - Robertshaw 9400 User Manual

TERM EQUIPMENT TO CONNECT
Rh 24VAC hot connection
Rc 24VAC hot connection
W Heat connection
Y Compressor Connection
B Accessory**
O Accessory**
G Indoor fan connection
* This thermostat can be used as a heat only or cool only thermostat therefore it is not always
necessary to use both Y and W.
**The O and B terminals are accessory terminals that typically are used for heat pump applications.
RESET
NON-HP
15. Set the GAS/ELEC switch to either GAS for a gas/oil heating
system or ELEC for an electric heating system (Figure 6).
16. Set the HP/NON-HP switch to either the HP for heat pump or
NON-HP for furnace applications (Figure 6).
17. Install two AA Energizer brand batteries or equivalent into
battery compartment as shown (Figure 6).
18. Replace thermostat cover by snapping into place.
TERMINAL LEGEND - 9400
GAS/ELECTRIC
°F
ROOM
OFF
HP
REQ?
Yes For input of 24VAC hot
side of heat transformer
Yes For input of 24VAC hot
side of cool transformer
Yes* Energizes on a call for
heating
Yes* Energizes on a call for
cooling
No Energizes when in the
HEAT mode
No Energizes when in the
COOL mode
Yes Energizes with Y & W
terminals or with FAN
option switched to the
ON position
Switch
+
-
NON-HP/HP
Switch
Figure 6
6

TERMINAL FUNCTION

GAS ELEC
-
+