Robertshaw 9405 Operation & User’s Manual

6, 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. Install two AA Energizer brand batteries or equivalent into battery compartment as shown (Figure 6). 17. Replace thermostat cover by snapping into place.…

5, Robertshaw 9405 5 R W G T H E R M O S T A T 120 VAC 24 VAC Transformer Hot HEATING CONTROL R W G T H E R M O S T A T FAN CONTROL HEATING CONTROL 120 VAC 24 VAC Transformer Hot R W G T H E R M O S T A T TT PP PP T N Gas valve Pilot Generator ◆ Wiring Diagrams HEAT ONLY 2-WIRE SINGLE TRANSFORMER HEAT ONLY…

8, 4. Put the -ON-AUTO switch into the ON position. The blower fan should turn on. The display will show a and ON. 5. Put the -ON-AUTO switch into the AUTO position. The blower fan should turn off. Step 4: Customizing the Thermostat ◆ Settings System Off: The heating system is …

9, 9 ◆ Temperature Differential The temperature differential is factory set at 1.0°F (.5°C). This means that whenever the room temperature changes by one degree Fahrenheit from the temperature setting, the system will turn on. If the system turns on too often, increase the temperature diffe…

10, Step 5: Troubleshooting Symptom Remedy Thermostat does not turn on system. Check wiring (see Installation section). If problems with thermostat cannot be resolved, call: Technical Support: (800) 445-8299 Monday-Friday 7:30 AM - 5:30 PM CST 10 Thermostat turns system on and off…