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DIGITAL
NON-PROGRAMMABLE
THERMOSTAT
8
425
ELECTRIC
E
GAS
G
OIL
O
®
NeW
2 Heat / 2 Cool
User's Manual
Quick Start
Installation
HEAT PUMP
H
Application
The Robertshaw 8425 is a multi-stage thermostat designed to control
24 VAC heat pump systems.
Features
• Large backlit display
• Adjustable 1
st
stage temperature differential: 1.0°F to 3.0°F (0.5°C to
1.5°C)
• Adjustable 2
nd
stage temperature differential: 1.0°F to 6.0°F (0.5°C to
3.0°C)
• Adjustable 2
nd
stage delay (10-40 minutes)
• 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
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