Robertshaw 9520 User Manual page 2

Features
• Multi-stage heating and cooling control
• Zone system compatible as a master thermostat
• Multi-colored LED indicators for system status
• Low battery indicator.
• Fahrenheit/Celsius display option.
• Adjustable from 45°F (4°C) to 90°F (32°C).
• Accuracy within ± 1 degree.
• Adjustable temperature differential: 1-3 degrees F.
• Automatic heating shutdown if temperature exceeds 90°F (32(C).
Step 1: Replacing Existing Thermostat
1. Turn off power to heating and cooling system.
2. Remove cover of old thermostat to expose wires. (Figure 1)
3. Disconnect wires one at a time from existing terminals. USE
ENCLOSED LABELS TO MARK EXISTING WIRES. Refer to cross refer-
ences in Table 1 if existing wiring does not directly match the labels.
•
If you have any questions about cross referencing the old terminal to
the new label, reference your equipment installation manual, a
licensed contractor, or call Robertshaw Tech Support (800) 445-8299
4. Remove existing thermostat base from wall.
Figure 1
2