Robertshaw RS9423T Thermostat Installation Guide

Robertshaw RS9423T Manual: Questions and Answers

Can I install Robertshaw RS9423T without a common wire if using batteries?

Yes, the C (common wire) is optional when the thermostat is powered by batteries. Installation Guide, p. 14

How do I connect Robertshaw RS9423T terminals to wires without damaging them?

Loosen the terminal block screws before inserting wires. Do not exceed 6 in-lbs of torque when re-tightening, as over-tightening can damage the terminal block and prevent proper installation.

1. Loosen the terminal block screws.
2. Insert wires into the appropriate terminals.
3. Re-tighten the terminal block screws to a maximum of 6 in-lbs. Installation Guide, p. 13

What is the Robertshaw RS9423T Room Temperature Calibration setting?

Allows adjustment of room temperature display up to 4° above or below factory calibration. Installation Guide, p. 20

How do I set the time and day on my thermostat?

Press MENU, then SET TIME. Use the arrow keys to select day of week, hour, and minutes in sequence, pressing NEXT between each field.

1. Press MENU
2. Press SET TIME
3. Use arrow keys to select day of week, then press NEXT
4. Use arrow keys to select hour, then press NEXT
5. Use arrow keys to select minutes
6. Press DONE Installation Guide, p. 29

Why isn't my Robertshaw RS9423T responding when I try to program the schedule?

• Press RUN SCHED if the menu does not appear first
• Select HEAT or COOL mode before programming, as heat and cool must be programmed separately
• Ensure you're entering time and temperature for each of the four periods: WAKE, LEAVE, RETURN, and SLEEP Installation Guide, p. 30

What do the buttons on Robertshaw RS9423T control?

Installation Guide, p. 8

What does flashing on the Robertshaw RS9423T mean?

Flashing system operation icons indicate a 5-minute delay for compressor protection is active. Installation Guide, p. 8

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