Robertshaw 9520 User Manual page 3

Table 1
Old Terminal
R, V-VR or VR-R
Y, Y1 or M
O or R
B
F or G
Y2
W1 or W2 or W-U
L or X
E
C, X or B
*NOTE: T
HIS THERMOSTAT REQUIRES A
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
D
O NOT INSTALL BEHIND A DOOR
OR STEAM GENERATING FIXTURES
1. Turn off power to the heating
and cooling systems.
2. Place COOL-OFF-HEAT-EM
in OFF position.
COOL-OFF-HEAT-EM
24V
,
MOUNT THERMOSTAT ON INSIDE WALL
, ,
IN A CORNER
. I
NSTALLATION AT THESE PLACES WILL AFFECTS THERMOSTAT OPERATION
AUTO - ON AUX CHECK EMER
New Label
R
Y
O
B
G
Y2
W2
L
E
C
COMMON WIRE FOR PROPER OPERATION
,
NEAR AIR VENTS IN DIRECT SUNLIGHT
3
Description
24 VAC Return
Stage 1 Cooling/Heating
Circuit
Reversing Valve
(Cooling Mode)
Reversing Valve
(Heating Mode)
Fan Control Relay
2nd Stage Cooling
Circuit
2nd Stage Heating
Control
System Monitor LED
Emergency Heating
Circuit
24 VAC Transformer
Common Side
.
, 4-5
FEET ABOVE THE FLOOR
,
OR NEAR ANY HEAT
COOL-OFF-HEAT-EM
AUTO - ON
.
.