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Robertshaw 8625 - User Manual

Robertshaw 8625
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1
Application
The Robertshaw 8625 is a multi-stage thermostat designed to control
24 VAC heat pump systems.
Features
Large backlit display.
Four preprogrammed E
NERGY STAR
®
setpoints for each day of the week.
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).
Energy Efficient Recovery (EER™).
Residual cooling for added air conditioning efficiency.
Zone compatible as master thermostat.
Fahrenheit/Celsius display option.
Programmable from 45°F (4°C) to 90°F (32°C).
Accuracy within ± 1 degree.
Separate heating and cooling programs.
110-1101B
5 - 2 Day Programmable
2 Heat / 2 Cool
User’s Manual
Quick Start
Installation and
Programming
W
A
R
R
A
N
T
Y
2
T
W
O
Y
E
A
R
DIGITAL
PROGRAMMABLE
THERMOSTAT
8
62
5
ELECTRIC
E
GAS
G
OIL
O
®
NeW
HEAT PUMP
H
As an ENERGY STAR
®
partner, Invensys Controls Americas has determined
that this thermostat meets the ENERGY STAR
®
guidelines for energy efficiency.
110-1101B
110-1101B 3/4/05 3:56 PM Page 1

Questions and Answers

  • M
    Monica HuffJul 31, 2025
    Why does my Robertshaw 8625 not follow the program?
    • L
      Loretta ChungJul 31, 2025
      If your Robertshaw Thermostat isn't following the set program, ensure that the thermostat is programmed in either the HEAT or COOL position. Also, verify the program and day of the week are correct. Check the AM/PM indicators at the time of day and programmed time changes.
  • T
    Timothy WhiteAug 11, 2025
    What to do if Robertshaw 8625 turns on and off too frequently?
    • D
      David NguyenAug 11, 2025
      If your Robertshaw Thermostat is turning on and off too frequently, increase the temperature differential.
  • E
    Erika FloresAug 20, 2025
    Why system fan does not operate properly on Robertshaw 8625?
    • E
      Elizabeth BuchananAug 20, 2025
      If the system fan on your Robertshaw Thermostat isn't operating correctly, move the Electric/Gas switch to either gas or electric, to match your system type.

Summary

Users Manual Quick Start Installation and Programming

Installing Item 8625 Thermostat

Wiring Diagrams

Heat Pump Wiring Diagrams

Illustrations for connecting the thermostat to various heat pump systems.

To Test Thermostat

Testing Procedures

Step-by-step guide to verify the thermostat's functionality after installation.

Programming Guide

Setting Time of Day and Day of Week

Instructions for setting the current time and day on the thermostat.

Programming Your Thermostat

Guide to setting up daily heating and cooling schedules for comfort.

Troubleshooting

Common Thermostat Issues and Remedies

Lists common symptoms and their corresponding solutions for thermostat operation.

Robertshaw 8625 Specifications

General IconGeneral
Stages of Heating1
Stages of Cooling1
BacklightNo
Hold FunctionYes
Battery LifeUp to 1 year
Power SourceBattery (2 AA)
Display TypeLCD
CompatibilitySingle-stage heating and cooling systems

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