Aprilaire 8600 User Manual
READ AND SAVE THESE INSTRUCTIONS
Safety &
Installation
Instructions
Model 8600 Universal
Touch Screen Thermostat
Installation location recommendations ................................................................2
Outdoor temperature sensor (optional) ................................................................2
Remote temperature sensor (optional) ................................................................3
Thermostat mounting..............................................................................3
Power & reset options .............................................................................3
Wiring terminal ..................................................................................4
Wiring diagrams ...............................................................................4-5
TABLE OF CONTENTS
INSTALLATION
SETUP & TESTING
REFERENCES
Equipment type selection switch (SW1) ...............................................................5
Installer setup menu ..............................................................................5
System test menu ................................................................................8
Quick reference to controls & display................................................................10
Troubleshooting .................................................................................11
Error codes .....................................................................................11
Thermostat features .............................................................................12
Specifications...................................................................................12
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2
INSTALLATION
INSTALLATION LOCATION RECOMMENDATIONS
Thermostat should be mounted:
• On an interior wall, in a frequently occupied space.
• Approximately 5‘ above floor.
• At least 18” from outside wall.
• Thermostat can be mounted to a vertical junction box.
Do not mount thermostat:
• Behind doors, in corners or other dead air spaces.
• In direct sunlight, near lighting fixtures, or other
appliances that give off heat.
• On an outside or unconditioned area wall.
• In the flow of a supply register, in stairwells, or near
outside doors.
• On a wall with concealed pipes or ductwork.
OUTDOOR TEMPERATURE SENSOR (OPTIONAL)
Heat pump models can use the outdoor
temperature to effectively utilize the heat pump:
• When the outdoor temperature is less than the Low
Balance Point, the heat pump will be locked out and
only auxiliary heating will be used.
• When the outdoor temperature is higher than the
High Balance Point, the auxiliary heating will be
locked out and only the heat pump will be used to
provide heating.
Outdoor temperature sensor should be mounted:
• On side of building out of direct sunlight (north side
recommended).
• Above snow line.
• At least 3’ away from exhaust vents and condensing
lines.
• Using less than 300’ of wire.
• Do not route wires along 120 VAC lines.
T2T1
S1
C
L
S2
W2
R
RC
W
B
O
Y
Y2
G
Outdoor temperature can be measured by attaching an 8052 sensor to the S1 and S2 terminals. The outdoor sensor
must be enabled in the installer setup menu.
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3
REMOTE TEMPERATURE SENSOR (OPTIONAL)
A remote temperature sensor can be used if the thermostat has to be mounted in a concealed location. A 8051 flush
mount or 8053 surface mount remote temperature sensor can be attached to the T1 and T2 terminals and mounted
in a recommended area. The remote sensor must be enabled in the installer setup menu. When the remote sensor is
installed it overrides the internal sensor.
Do not mount remote sensor:
• Behind doors, in corners or other dead air spaces.
• In direct sunlight, near lighting fixtures, or other
appliances that give off heat.
• On an outside or unconditioned area wall.
• In the flow of a supply register, in stairwells, or near
outside doors.
• On a wall with concealed pipes or ductwork.
• Near 120 VAC lines.
T2T1
S1
C
L
S2
W2
R
RC
W
B
O
Y
Y2
G
Remote temperature sensor should be mounted:
• On an interior wall, in a frequently occupied space.
• Approximately 5‘ above floor.
• At least 18” from outside wall.
• Using less than 300’ of wire.
THERMOSTAT MOUNTING
1. Remove the rear mounting plate from the thermostat.
2. Pull wires through the opening on the back of the
thermostat.
3. Position and level the mounting plate of the thermostat
on wall and mark the hole locations with a pencil.
4. Drill 1/4” holes and insert supplied anchors
(drywall only).
5. Place mounting plate over anchors, insert and tighten
screws.
6. Seal wire entry holes to prevent drafts affecting
temperature readings.
POWER & RESET OPTIONS
The thermostat is dual power. It can either be AC or battery powered, or both (to provide backup power for the clock).
Batteries are optional if your thermostat was wired to run on AC power when installed.
For heat pump systems the C terminal must be connected to the common of the 24VAC transformer in order for the
system fault and emergency heat indicators to operate.
The thermostat has a memory backup that saves the thermostat settings in case of a power interruption. The system
settings will be retained but the clock will reset after 90 seconds with no battery or AC power.
The reset button located under the battery cover can be used to reset the thermostat to factory defaults. The system
settings will also be reset to default.
INSTALLATION
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WIRING TERMINAL
Wire specifications:
18-24 gauge thermostat wire
Installation notes:
• Ensure power at the HVAC equipment is off.
• Loosen screw terminals, insert stripped wire and
re-tighten.
• Push the excess wire back into the opening and plug
the wall opening to prevent drafts.
INSTALLATION
C – Common (optional when powered by batteries)
B – Reversing valve
1
O – Reversing valve
1
Y – 1st stage cooling / compressor
Y2 – 2nd stage cooling / compressor
G – Fan
RC – 24VAC supply cooling
2
R – 24VAC supply heating
2
W2 – 2nd stage heat / auxiliary
W – 1st stage heat / auxiliary
L – System fault indicator (optional) (heat pump only)
S1 & S2 – outdoor temperature sensor (optional)
T1 & T2 – remote temperature sensor (optional)
1
O and B terminals are both de-energized when system mode is
OFF or in AUTO when the heating and cooling equipment is idle.
2
Jumper between RC & R is used in single transformer systems
(see wiring diagrams).
C
BY
ORC
RG
Y2 W2
LT2
T1
S1
S2
W
SINGLE TRANSFORMER (USE JUMPER WIRE) TWO TRANSFORMERS (REMOVE JUMPER WIRE)
JUMPER
OUTDOOR TEMP
SENSOR
1st HEATING
1st COOLING
FAN
2nd HEATING
2nd COOLING
NOT USED
NOT USED
TRANSFORMER
REMOTE TEMP
SENSOR
NOT USED
GY2YOBWRC RW2S2LCS1T1T2
NOT USED
NOT USED
2nd COOLING
2nd HEATING
FAN
1st COOLING
1st HEATING
OUTDOOR TEMP
SENSOR
COOLING
HEATING
REMOTE TEMP
SENSOR
NOT USED
TRANSFORMER
TRANSFORMER
GY2YOBWRC RW2S2LCS1T1T2
CONVENTIONAL HEAT/COOL
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