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110-1089B.qxd
3/8/05
NeW
110-1089B
Application
The Robertshaw 8406 is a single-stage thermostat designed to control
24 VAC cooling systems.
Features
• Low battery indicator
• Large backlit display
• Adjustable temperature differential: 1°F to 3.0°F (0.5°C to 1.5°C)
• Compressor short cycle protection
• Accuracy within ±1°
• Zone system compatible as a master thermostat
• Permanent memory retention
• Fahrenheit/Celsius display option
• Adjustable from 45°F to 90°F (7°C - 32°C)
• Quick wire terminal block
10:30 AM
Page 1
8 406
®
E
ELECTRIC
1 Cool
User's Manual
Quick Start
Installation
1
DIGITAL
NON-PROGRAMMABLE
THERMOSTAT
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Table of Contents
Related Manuals for Robertshaw 8406
Summary of Contents for Robertshaw 8406
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Page 1: Quick Start
User's Manual Quick Start Installation 110-1089B Application The Robertshaw 8406 is a single-stage thermostat designed to control 24 VAC cooling systems. Features • Low battery indicator • Large backlit display • Adjustable temperature differential: 1°F to 3.0°F (0.5°C to 1.5°C) •... - Page 2 110-1089B.qxd 3/8/05 10:30 AM Page 2 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. • DO NOT CONNECT TO 120 VAC. This is a 24 VAC low-voltage thermostat.
- Page 3 4. Remove existing thermostat base from wall. Figure 1 Step 2: Installing Model 8406 Thermostat NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON INSIDE WALL, FIVE FEET ABOVE THE FLOOR. DO NOT...
- Page 4 110-1089B.qxd 3/8/05 10:30 AM Page 4 4. Remove the cover using a coin or screwdriver (Figure 3). Set aside. au to of f co he at ° M ON se t va c cl oc k te m p ho ld ru n/ se ho ld pr og...
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Page 5: Wiring Diagrams
110-1089B.qxd 3/8/05 10:30 AM Page 5 Wiring Diagrams ♦ COOL ONLY 2-WIRE SINGLE TRANSFORMER Factory-Installed Jumper Transformer 120 VAC 24 VAC Cooling Control COOL ONLY 3-WIRE SINGLE TRANSFORMER Factory-Installed Jumper Transformer 120 VAC 24 VAC Cooling Control Control... - Page 6 110-1089B.qxd 3/8/05 10:30 AM Page 6 TERMINAL LEGEND - 8406 TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION 24VAC hot connection For input of 24VAC hot side of heat transformer 24VAC hot connection For input of 24VAC hot side of cool transformer...
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Page 7: Step 3: Testing The Thermostat
110-1089B.qxd 3/8/05 10:30 AM Page 7 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 SYSTEM TO COOL OR LEAVE IN COOL MODE IF THE TEMPERATURE IS BELOW 50°F (10°C). -
Page 8: Settings
110-1089B.qxd 3/8/05 10:30 AM Page 8 Step 4: Customizing the Thermostat Settings ♦ System Cool: The thermostat controls the cooling. Off: The heating and cooling systems are off. Auto: Equipment controls the fan. On: The fan operates continuously. Temperature Differential ♦... -
Page 9: Check Filter Reset
110-1089B.qxd 3/8/05 10:30 AM Page 9 Check Filter Reset ♦ Once the filter timer has expired, CHECK FILTER will turn on and stay on. To clear the message and reset the timer: 1. Press the buttons and hold for 3 seconds. CLr will appear in the time display. -
Page 10: Step 5: Troubleshooting
110-1089B.qxd 3/8/05 10:30 AM Page 10 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). Display is blank, flashing or Replace batteries. -
Page 11: Two-Year Limited Warranty
110-1089B.qxd 3/8/05 10:30 AM Page 11 Two Year Limited Warranty Invensys Controls Americas 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. - Page 12 110-1089B.qxd 3/8/05 10:30 AM Page 12 NOTES...
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