Robertshaw 9520 NON-PROGRAMMABLE THERMOSTAT User Manual

Robertshaw 9520 NON-PROGRAMMABLE THERMOSTAT

IMPORTANT SAFETY INFORMATION

WARNING:

• Always turn off power at the main power source by unscrewing the fuse or switching the circuit breaker to the OFF position before installing, removing, cleaning, or servicing the thermostat.
• Read all of the information in this manual before installing or programming this thermostat
• This is a 24V AC low-voltage thermostat. Do not install on voltages higher than 30V AC.
• All wiring must conform to local and national building and electrical codes and ordinances.
• Do not short (jumper) across terminals on the gas valve or at the system control to test installation. This will damage the thermostat and void the warranty

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 the temperature exceeds 90°F (32C).

Step 1: Replacing the Existing Thermostat

1. Turn off power to the heating and cooling system.
2. Remove the cover of the 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-references in Table 1 if existing wiring does not directly match the labels.
4. 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
5. Remove the existing thermostat base from the wall.

Table 1

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 the proper disposal of the thermostat. If you have any questions, call Robertshaw technical support at 1-800-445-8299.

Step 2: Installing Model 9520 Thermostat
NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON THE INSIDE WALL, 4-5 FEET ABOVE THE FLOOR. DO NOT INSTALL BEHIND A DOOR, IN A CORNER, NEAR AIR VENTS, IN DIRECT SUNLIGHT, OR NEAR ANY HEAT OR STEAM-GENERATING FIXTURES. INSTALLATION AT THESE PLACES WILL AFFECT THERMOSTAT OPERATION.

1. Turn off power to the heating and cooling systems.
2. Place COOL-OFF-HEAT-EM in the OFF position.
3. Place AUTO-ON switch into the AUTO position.
4. Remove the cover using a coin or screwdriver
5. Place the thermostat against the wall at the desired location. Make sure wires will feed through the opening on the base of the thermostat.
6. Mark the placement of mounting holes. See Figure 3. Set base aside.
7. Drill the marked holes using a 3/16″ drill bit. NOTE: Enclosed plastic anchors do not require a drilled hole for drywall.
8. Tap plastic anchors into the wall.
9. Align the base with plastic anchors and feed wires through the opening.
10. Secure the base to the wall with supplied screws.
11. terminal screws are loosened. Insert wires into the terminal strip (Figure 4) matching the label to the corresponding terminal (see Wiring Diagrams below). Tighten screws.

9520 WIRING SAMPLE #1
Typical heat pump with cool active reversing valve and auxiliary/emergency heat.

For systems using a backup heat source. If a separate E terminal connection is not available, jumper E and W2.
Most heat pump systems will have a cool active OR a heat active reversing valve. Use the appropriate terminal. Put the °F/°C switch to either °F for the Fahrenheit display or °C for the Celsius display (see Figure 5).

Replace the cover on the thermostat by snapping it into place. Turn on the power to the system. Test the thermostat as described in the following section.

Step 3: Testing the Thermostat
WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY.
CAUTION: DO NOT SWITCH THE SYSTEM TO COOL IF THE TEMPERATURE IS BELOW 50°F (10°C). THIS CAN DAMAGE THE AIR CONDITIONING SYSTEM AND CAUSE PERSONAL INJURY.

1. Place the COOL-OFF-HEAT-EM switch into the COOL position
2. Press the button until the temperature setting is at the east 3 degrees below the room temperature. The air conditioning system should turn on within a few seconds.
   NOTE: Once the thermostat turns off when in the COOL mode, a built-in 5-minute delay prevents the system from turning on again. This protects the compressor. No additional time delay relay is required. To override the 5-minute delay for installation, press the RESET button.
3. Put the COOL-OFF-HEAT-EM switch into the OFF position. The air conditioning system should turn off.
4. Put the COOL-OFF-HEAT-EM switch into the HEAT position.
5. Press the button until the temperature setting is at least 3 degrees above room temperature. The heating system should turn on. The fan may not turn on immediately, depending on the fan delay built into the furnace.
6. Put the COOL-OFF-HEAT-EM switch into the OFF position. The heating system should turn off. The fan may continue to run for a short period of time.
7. Put the AUTO-ON switch in the ON position. The blower fan should turn on.
8. Put the AUTO-ON switch to the AUTO position. The blower fan should turn off.

Step 4: Customizing Your Thermostat Setting or Changing the Setpoint Temperature

System
Cool: The thermostat controls the cooling.
Off: The heating and cooling systems are off.
Heat: The thermostat controls the heat.
EM: The thermostat controls the second stage of emergency heat.

Fan
Auto: Equipment controls the fan.
On: The fan operates continuously.

Temperature
The default setpoint temperature for heating is 70°F (21°C), and the default setpoint temperature for cooling is 78°F (25°C). After putting the system switch in heat, cool, or em, press either the>or button to adjust the temperature setting up or down.

Changing Temperature Differential
IMPORTANT: The temperature differential is factory set at 1 (1°). This means that whenever the room temperature changes by one-half of a degree from the temperature setting, the system will turn on. If the system turns on too often, increase the temperature differential.

1. Press >both buttons at the same time and hold for one second. The display will show:
2. Press either the or button to adjust the temperature differential up or down. The display will return to room temperature five seconds after the last input.

Changing Fahrenheit (F) to Celsius (C)
The thermostat is preset to display the temperature in degrees Fahrenheit. You may change the display to Celsius if desired.

1. Move the manual switch marked F (Fahrenheit) and C (Celsius) located at the top center of the circuit board to the desired setting (see page 7).
2. Press the RESET button located to the right of the LCD display to register the change. The display will change to show the temperature in your desired temperature scale. To return the thermostat to its original setting, repeat steps 1 and 2 above.

LED Indicators
The LED indicators are used to indicate system activity. The AUX indicator illuminates during a call for second-stage heating. The auxiliary stages are used to maintain comfort during extreme in weather conditions. If the AUX LED is illuminated too frequently during periods of moderate temperature, check the differential settings (see above). The CHECK indicator is used to monitor the system status. If the CHECK indicator is illuminated, call your local HVAC service provider. The EMER indicator is illuminated only when the system switch is moved
to the EM, emergency heat position. The EM position is used only when the primary stage of heat is not functioning or requires service.

Troubleshooting

If problems with the thermostat cannot be resolved, call: Technical Support: at (800) 445-8299 Monday-Friday 7:30-5:30 CST

Five-Year Limited Warranty

Maple Chase Company warrants to the original contractor installer or to the original consumer user, each new Robertshaw thermostat to be free from defects in materials and workmanship under normal use and service for a period of five (5) years from the date of purchase. This warranty and our liability do not apply to batteries or the merchandise that has been damaged, caused by misuse, neglect, mishandling, alterations, improper installation, or use in a way other than in accordance with Maple Chase Company recommendations and instructions.
Maple Chase Company agrees to repair or replace at its option any thermostat under warranty provided it is returned within the warranty period, postage prepaid, with proof of the date of purchase. The cost of thermostat removal or reinstallation is not the responsibility of Maple Chase Company.

Repair or replacement as provided under this warranty is the exclusive remedy of the consumer. Maple Chase Company shall not be liable for any incidental or consequential damages for breach of any express or implied warranty on this product, or under any other theory of liability. Except to the extent prohibited by applicable law, any implied warranty of merchantability or fitness for a particular purpose on this product is limited to the duration of this warranty. Some states do not allow the exclusion or limitation of incidental or consequential damages or allow limitations on how long an implied warranty lasts, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. For warranty returns, send thermostat, shipping prepaid to:
Uni-Line North America
Warranty Claims Department 515 S. Promenade
Corona, CA 91719 Maple Chase Company 2820 Thatcher Road Downers Grove, Illinois 60515 United States of America

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