Aprilaire 8444 Safety & Installation Instructions

10 11
INSTALLATION
WIRING – MODEL 8466 & 8448 SINGLE
TRANSFORMER (USE JUMPER WIRE)
FOR HEAT PUMP SYSTEM
1st AUX HEATING
1st COMPRESSOR
FAN
REVERSE VALVE
FAULT DETECT
2nd AUX HEATING
2nd COMPRESSOR
OUTDOOR TEMP
SENSOR
HEAT PUMP
TRANSFORMER
C
G
Y
W
R
L
S1
S2
O/B
W2
Y2
RC
JUMPER
1st AUX HEATING
1st COMPRESSOR
FAN
REVERSE VALVE
FAULT DETECT
2nd AUX HEATING
2nd COMPRESSOR
OUTDOOR TEMP
SENSOR
HEATING
TRANSFORMER
HEAT PUMP
TRANSFORMER
C
G
Y
W
R
L
S1
S2
O/B
W2
Y2
RC
WIRING – MODEL 8466 & 8448 TWO
TRANSFORMERS (REMOVE JUMPER WIRE)
FOR HEAT PUMP SYSTEM
SYSTEM SETUP INSTRUCTIONS
How to enter the system setup menu to change
system settings
Press
repeatedly until system is set to OFF.
Press and hold
and for three seconds.
The screen of the first setting will be displayed.
SETUP & TESTING
Press or to change the setting.
Press
to change to the next option.
Press
after the last setting. “DONE” will be
displayed.
The thermostat will save changes and return to Normal
mode if no key is pressed for 20 seconds.
To reset all system settings back to default, press the
RESET button located under the battery door.
The following instructions show how to enter the system setup menu and change settings. The table on the
following pages lists the settings and their details. Default settings are shown in bold. Some settings are only
available to certain models, and some are specific to thermostats set to heat pump mode.
SYSTEM SETTING NUMBER
SETTING VALUE

Aprilaire 8444 Specifications

General

Brand	Aprilaire
Model	8444
Category	Thermostat
Language	English