Robertshaw 9520 - Manual (Page 3)

Table 1
Old Terminal New Label Description
R, V-VR or VR-R R 24 VAC Return
Y, Y1 or M Y Stage 1 Cooling/Heating
Circuit
O or R O Reversing Valve
(Cooling Mode)
B B Reversing Valve
(Heating Mode)
F or G G Fan Control Relay
Y2 Y2 2nd Stage Cooling
Circuit
W1 or W2 or W-U W2 2nd Stage Heating
Control
L or X L System Monitor LED
E E Emergency Heating
Circuit
C, X or B C 24 VAC Transformer
Common Side
*NOTE: T
HIS THERMOSTAT REQUIRES A
24V
COMMON WIRE FOR PROPER OPERATION
.
Recycling Thermostat
If this thermostat is replacing a thermostat that contains mercury in a
sealed tube, do not place your old thermostat in the garbage. Contact your
local waste management authority for instructions regarding proper dis-
posal of the thermostat. If you have any questions, call Robertshaw tech-
nical support at 1-800-445-8299.
Step 2: Installing Model 9520 Thermostat
NOTE: F
OR NEW INSTALLATIONS
,
MOUNT THERMOSTAT ON INSIDE WALL
, 4-5
FEET ABOVE THE FLOOR
.
D
O NOT INSTALL BEHIND A DOOR
,
IN A CORNER
,
NEAR AIR VENTS
,
IN DIRECT SUNLIGHT
,
OR NEAR ANY HEAT
OR STEAM GENERATING FIXTURES
. I
NSTALLATION AT THESE PLACES WILL AFFECTS THERMOSTAT OPERATION
.
1. Turn off power to the heating
and cooling systems.
2. Place COOL-OFF-HEAT-EM
in OFF position.
3
COOL-OFF-HEAT-EM AUTO - ON AUX > >
CHECK EMER
COOL-OFF-HEAT-EM
AUTO - ON