Robertshaw 9405 User Manual
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Robertshaw 9405 User Manual

Robertshaw 9405 User Manual

Digital non-programmable thermostat
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110-1042
Application
The Robertshaw 9405 is a single-stage thermostat designed to control
24 VAC gas, electric, or millivolt heating systems.
Features
• Low battery indicator
• Large back lit display
• Adjustable temperature differential: .5°F to 3.0°F (0.5°C to 1.5°C)
• Accuracy within ±1°
• Fahrenheit/Celsius display option
• Adjustable from 45°F to 90°F (7°C - 32°C)
• Quick wire terminal block
• Low temperature freeze protection. While in heat mode, thermostat
will mechanically turn on heat if temperature drops to 40°F (4°C)
even if batteries are missing or drained.
• Automatic heating shutdown if temperature exceeds 94°F (34°C)
9405
®
1
DIGITAL
NON-PROGRAMMABLE
THERMOSTAT
G
E
GAS
ELECTRIC
MILLIVOLT
1 Heat
User's Manual

Quick Start

Installation
M

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Summary of Contents for Robertshaw 9405

  • Page 1: Quick Start

    User's Manual Quick Start Installation 110-1042 Application The Robertshaw 9405 is a single-stage thermostat designed to control 24 VAC gas, electric, or millivolt heating systems. Features • Low battery indicator • Large back lit display • Adjustable temperature differential: .5°F to 3.0°F (0.5°C to 1.5°C) •...

  • Page 2: Important Safety Information

    IMPORTANT SAFETY INFORMATION WARNING: • Always turn off power at main fuse or circuit breaker panel before installing, removing, cleaning, or servicing thermostat. • Read all the information in this manual before installing this thermostat. • This is a 24 VAC low-voltage thermostat. Do not install on voltages higher than 30 VAC.

  • Page 3: Installing

    Contact your local waste management authority for instructions regarding proper disposal of the thermostat. If you have any ques- tions, call Robertshaw technical support at 1-800-445-8299. Step 2: Installing Model 9405 Thermostat NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON INSIDE WALL, FIVE FEET ABOVE THE FLOOR.
  • Page 4 5. Place thermostat against the wall at desired location. Make sure wires will feed through opening (Figure 4) on base of thermostat. 6. Mark placement of mounting holes (Figure 4). Set base aside. Mounting Holes ELEC RESET NON-HP Wiring Opening Figure 4 7.

  • Page 5: Wiring Diagrams

    Wiring Diagrams HEAT ONLY 2-WIRE SINGLE TRANSFORMER Transformer 120 VAC 24 VAC HEATING CONTROL HEAT ONLY 3-WIRE SINGLE TRANSFORMER Transformer 120 VAC 24 VAC HEATING CONTROL CONTROL 250-750 MILLIVOLT SYSTEM Pilot Generator Gas valve...

  • Page 6: Terminal Function

    TERMINAL LEGEND - 9405 TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION 24VAC hot connection For input of 24VAC hot side of heat transformer Heat connection Yes* Energizes on a call for heating Indoor fan connection Energizes with W terminal or with FAN...

  • Page 7: Step 3: Testing The Thermostat

    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. 1. Put the HEAT-OFF switch into the HEAT position. The display will read HEAT. 2.
  • Page 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 off.

  • Page 9: Backlit Display

    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 differential. Changing Fahrenheit (°F) to Celsius (°C), and the Temperature Differential 1.

  • Page 10: Step 5: Troubleshooting

    Step 5: Troubleshooting Symptom Remedy Check wiring (see Installation Thermostat does not turn on system. section). Thermostat turns system on and Increase temperature differential (see Changing the Temperature off too frequently. Differential section). Replace batteries. Display is blank, flashing or constant LOW BATT.

  • Page 11: Two-Year Limited Warranty

    Maple Chase 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 two (2) years from date of purchase. This warranty and our...
  • Page 12 NOTES...

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