8400 Series Thermostats
Safety &
Installation
Instructions
READ AND SAVE THESE INSTRUCTIONS
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61000652C 8400 Tstat Install.indd
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10/13/09 11:08:56 AM
INSTAllATION
INSTAllATION lOCATION RECOmmENDATIONS
Thermostat should be mounted:
Do not mount thermostat:
• On an interior wall, in a frequently occupied space.
• Approximately 5‘ above floor.
• Behind doors, in corners, or other dead air spaces.
• In direct sunlight, near lighting fixtures, or other
appliances that give off heat.
• At least 18” from outside wall.
• On an outside or unconditioned area wall.
• Thermostat can be mounted to a vertical junction box.
• In the flow of a supply register, in stairwells, or near
outside doors.
• On a wall with concealed pipes or ductwork.
3
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61000652C 8400 Tstat Install.indd
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INSTAllATION
OUTDOOR TEmpERATURE SENSOR (OpTIONAl)
Outdoor temperature can be measured by attaching an
8052 sensor to the S1 and S2 terminals. System setting
#05 (Remote sensor) is used to enable sensor.
• Install on side of building out of direct sunlight
(north side recommended).
• Mount above snow line.
Heat pump models can use the outdoor temperature to
effectively utilize the heat pump:
• Mount at least 3’ away from exhaust vents and
condensing lines.
• 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.
• Maximum wire length is 300’.
• Do not route wires along 120 VAC lines.
• 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.
RC
R
W
Y
G
C
S1 S2 O/B
L
W2 Y2
4
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61000652C 8400 Tstat Install.indd
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10/13/09 11:08:57 AM
INSTAllATION
THERmOSTAT mOUNTINg
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 the thermostat was
connected to AC power when installed.
For heat pump models (8446, 8448HP, 8465, 8466HP)
24 VAC must be connected in order for the system fault
and emergency heat indicators to operate.
The thermostat has a memory backup that saves the
thermostat’s settings in case of a power interruption.
The reset button located under the battery cover can be
used to reset the thermostat back to factory defaults.
The system settings will also be reset back to defaults.
1. Remove the back of the thermostat, by pressing the
tab on the bottom of the unit.
2. Pull wires through the opening on the back of the
thermostat.
3. Position and level the back of the thermostat on wall
and mark the hole locations with a pencil.
4. Drill 1/4” holes & insert supplied anchors (drywall only).
5. Place back over anchors, insert and tighten screws.
6. Seal wire entry holes to prevent drafts affecting
temperature readings.
5
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61000652C 8400 Tstat Install.indd
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10/13/09 11:08:58 AM
INSTAllATION
wIRINg TERmINAl
wire specifications
RC – 24 VAC supply cooling*
R – 24 VAC supply heating*
18-24 gauge thermostat wire
w – 1st stage heat / auxiliary
Y – 1st stage cooling / compressor
g – Fan
Installation notes
• Ensure power at the HVAC equipment is off.
C – Common (optional when powered by batteries)
S1 & S2 – outdoor temperature sensor (optional)
O/b – Reversing valve
• 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.
l – System fault indicator
w2 – 2nd stage heat / auxiliary
Y2 – 2nd stage cooling / compressor
*Jumper between RC & R is used in single transformer systems
(see wiring diagrams).
RC
R
W
Y
G
C
S1 S2 O/B
L
W2 Y2
6
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61000652C 8400 Tstat Install.indd
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INSTAllATION
wIRINg – mODEl 8463 & 8444 SINglE
TRANSfORmER (USE jUmpER wIRE)
wIRINg – mODEl 8463 & 8444 TwO
TRANSfORmERS (REmOVE jUmpER wIRE)
RC
R
W
Y
G
C
S1 S2
RC
R
W
Y
G
C
S1 S2
7
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61000652C 8400 Tstat Install.indd
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10/13/09 11:08:58 AM
INSTAllATION
wIRINg – mODEl 8465 & 8446 SINglE
TRANSfORmER (USE jUmpER wIRE)
wIRINg – mODEl 8465 & 8446 TwO
TRANSfORmERS (REmOVE jUmpER wIRE)
RC
R
W
Y
G
C
S1 S2 O/B
L
RC
R
W
Y
G
C
S1 S2 O/B
L
8
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61000652C 8400 Tstat Install.indd
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INSTAllATION
wIRINg – mODEl 8466 & 8448 SINglE
TRANSfORmER (USE jUmpER wIRE)
fOR HEAT/COOl SYSTEm
wIRINg – mODEl 8466 & 8448 TwO
TRANSfORmERS (REmOVE jUmpER wIRE)
fOR HEAT/COOl SYSTEm
RC
R
W
Y
G
C
S1 S2 O/B
L
W2 Y2
RC
R
W
Y
G
C
S1 S2 O/B
L
W2 Y2
9
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61000652C 8400 Tstat Install.indd
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10/13/09 11:08:58 AM
INSTAllATION
wIRINg – mODEl 8466 & 8448 SINglE
TRANSfORmER (USE jUmpER wIRE)
fOR HEAT pUmp SYSTEm
wIRINg – mODEl 8466 & 8448 TwO
TRANSfORmERS (REmOVE jUmpER wIRE)
fOR HEAT pUmp SYSTEm
RC
R
W
Y
G
C
S1 S2 O/B
L
W2 Y2
RC
R
W
Y
G
C
S1 S2 O/B
L
W2 Y2
10
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61000652C 8400 Tstat Install.indd 10
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SETUp & TESTINg
SYSTEm SETUp INSTRUCTIONS
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.
How to enter the system setup menu to change
system settings
press
press
or
to change the setting.
to change to the next option.
press
repeatedly until system is set to OFF.
press
displayed.
after the last setting. “DONE” will be
press and hold
and
for three seconds.
The screen of the first setting will be displayed.
The thermostat will return to Normal mode if no key is
pressed in 3 seconds.
To reset all system settings back to default, press the
RESET button located under the battery door.
SETTING VALUE
SYSTEM SETTING NUMBER
11
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SETUp & TESTINg
SYSTEm SETUp INSTRUCTIONS (CONTINUED)
Thermostat models 8448 & 8466 have the option of being used in heat pump or heat/cool systems. Switch SW1
located on the back of the thermostat’s face is used to select this. System setting number 00 will only be shown on
these models to display the position of SW1.
Sw1
HEAT PUMP
HEAT/COOL
12
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61000652C 8400 Tstat Install.indd 12
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SETUp & TESTINg
SYSTEm SETUp INSTRUCTIONS (CONTINUED)
System setting
Setting range, default in bold
0 : heat/cool
1 : heat pump
00 Equipment type (8466, 8448) (Set by Sw1)
0 : fahrenheit
1 : Celsius
01 Temperature scale
0 : gas or oil furnace (Equipment controls fan)
1 : Electric (Thermostat controls fan)
02 Fan control in heating
0° : No offset applied
–4°F to +4°F (–2°C to +2°C)
03 Offset temperature for internal sensor
04 Auto mode
0 : Auto mode is disabled
1 : Auto mode is enabled
0 : No outdoor temperature sensor attached
1 : Outdoor temperature sensor attached
05 Outdoor temperature sensor
06 Compressor minimum off time
07 Heating minimum off time
08 Equipment minimum on time
5 minutes
1 to 5 minutes in 1 minute steps
2 minutes
1 to 5 minutes
2 minutes
1 to 5 minutes
13
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SETUp & TESTINg
SYSTEm SETUp INSTRUCTIONS (CONTINUED)
System setting
Setting range, default in bold
1°f (0.5°C)
1°F to 4°F (0.5°C to 2°C)
09 1st stage differential
1°f (0.5°C)
1°F to 4°F (0.5°C to 2°C)
10 2nd stage differential (8448, 8466)
1°f (0.5°C)
1°F to 4°F (0.5°C to 2°C)
11 3rd stage differential (8448HP, 8466HP)
12 Reverse valve (8446, 8466HP, 8465, 8466HP)
0 – O/b energized in cooling (O)
1 – O/B energized in heating (B)
13 Integral factor period (P+I control)*
4 minutes
1 to 5 minutes or “OFF” to disable
Set to OFF for proportional control only
3°f (2°C)
2°F to 5°F (1°C to 3°C)
14 Deadband (auto mode)
0 : Progressive recovery is disabled
1 : progressive recovery is enabled
15 Progressive recovery (8463, 8465, 8466)
*The integral factor is used in the equipment control algorithm to maintain the space temperature at set point.
A short integral factor period will increase the number of cycles per hour. (A short integral factor period will be more
comfortable.) A long integral factor period will lower the number of cycles per hour. (A long integral factor period will
be more economical.)
14
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61000652C 8400 Tstat Install.indd 14
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SETUp & TESTINg
SYSTEm SETUp INSTRUCTIONS (CONTINUED)
System setting
Setting range, default in bold
16 Low Balance Pt. (8446, 8448HP, 8465, 8466HP)
20°f (–7°C)
1°F to 35°F (–17°C to 1°C) or “OFF” to disable
System setting 05 must be enabled
17 High Balance Pt. (8446, 8448HP, 8465, 8466HP)
60°f (16°C)
40°F to 80°F (4°C to 27°C) or “OFF “ to disable
System setting 05 must be enabled
0 – 5/2 program (weekdays and weekends)
1 – 5/1/1 program (Weekdays, Sat. and Sun.)
19 Program format (8463, 8465, 8466)
20 Change air filter
Off
1, 3, 6, 12 months or “OFF” to disable
21 Change water panel**
Off
Set number of months until reminder is required
1 to 12 months or “OFF” to disable
0 : flow through type humidifier (1 reminder per season)
1 : Drain-less type humidifier (2 reminders per season)
22 Humidifier type**
23 Service dehumidifier
24 Service HVAC
Off
1 to 12 months or “OFF” to disable
Off
1 to 12 months or “OFF” to disable
**If humidifier type is set to Drain-less, then the first reminder is based on the system setting 21, second reminder
will activate 3 months later. If humidifier type is set to Flow through, then the first reminder is based on system
setting 21, second reminder will activate 12 months later.
15
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61000652C 8400 Tstat Install.indd 15
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SETUp & TESTINg
SYSTEm TEST mODE
The system test mode is used to test a system after installation. The outputs of the thermostat can be manually
activated one at a time to test their function. The following instructions show how to enter the test mode and turn
outputs on and off. The charts on the following pages show all of the options for each model.
The test steps are:
Test
Number
Heat/Cool models
8444, 8463, 8448HC, 8466HC
Heat pump models
8446, 8465, 8448Hp, 8466Hp
50
51
52
53
Heating (W) (W2)
Cooling (Y) (Y2)
Fan (G)
Aux Heating (W) (W2)
Compressor Cooling (Y) (Y2)
Compressor Heating (Y) (Y2)
Fan (G)
16
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61000652C 8400 Tstat Install.indd 16
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SETUp & TESTINg
SYSTEm TEST mODE (CONTINUED)
How to enter the system test menu
press
output, press
to turn on the output (01). For multi stage
again to turn on the 2nd stage (02).
press
repeatedly until system is set to OFF.
press
press
to turn off the output (00).
press and hold
and
for three seconds.
to change to the next test step.
after the last test step. “DONE” will be
The screen of the first test step #50 is displayed:
press
displayed.
The thermostat will return to Normal mode if no key is
pressed in 3 seconds.
FLASHES IF 24VAC
IS NOT PRESENT
SYSTEM TEST
NUMBER
MODE (SW1 SETTING
8448 & 8466 ONLY)
OUTPUT STATUS
17
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61000652C 8400 Tstat Install.indd 17
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SETUp & TESTINg
Test steps for 8444 & 8463
System Setting
Display (Output)
01
01
01
fAN ON
(g)
Step
Key Input
#2
HEATINg
ON (w)
COOlINg
ON (Y)
0 : Gas
1 : Elec
ON
ON
[UP]
#50 Heat
ON
ON
ON
[DOWN]
[UP]
ON
#51 Cool
[DOWN]
[UP]
#52 Fan
[DOWN]
18
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61000652C 8400 Tstat Install.indd 18
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SETUp & TESTINg
Test steps for 8448HC & 8466HC
System Setting
Display (Output)
01
02
01
02
01
fAN ON
(g)
Step
Key Input
#2
HEATINg
ON (w)
HEATINg
ON (w2)
COOlINg
ON (Y)
COOlINg
ON (Y2)
0 : Gas
1 : Elec
0 : Gas
1 : Elec
ON
ON
ON
ON
1st [UP]
2nd [UP]
ON
ON
#50 Heat
ON
ON
[DOWN]
1st [UP]
2nd [UP]
[DOWN]
[UP]
ON
ON
ON
ON
#51 Cool
ON
ON
#52 Fan
[DOWN]
19
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61000652C 8400 Tstat Install.indd 19
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SETUp & TESTINg
Test steps for 8446 & 8465
System Setting
Display (Output)
01 AUX
HEATINg
ON (w)
01
01
fAN ON
(g)
Step
Key Input
#2
#12
COOl/HEAT
ON (Y)
O/b
0 : Gas
1 : Elec
ON
ON
[UP]
[DOWN]
[UP]
#50 Aux
ON
0 : O
1 : B
0 : O
1 : B
0 : O
1 : B
0 : O
1 : B
ON
ON
ON
ON
ON
ON
#51 Cool
[DOWN]
[UP]
ON
ON
ON
ON
ON
ON
#52 Heat
#53 Fan
[DOWN]
[UP]
ON
[DOWN]
20
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61000652C 8400 Tstat Install.indd 20
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SETUp & TESTINg
Test steps for 8448Hp & 8466Hp
System Setting
Display (Output)
01 AUX
HEATINg
ON (w)
ON
ON
ON
ON
02 AUX
01
02
01
Step
Key Input
#2
#12
HEATINg COOl/HEAT COOl/HEAT fAN ON
O/b
ON (w2)
ON (Y)
ON (Y2)
(g)
ON
ON
0 : Gas
1 : Elec
0 : Gas
1 : Elec
1st [UP]
#50 Aux
ON
ON
2nd [UP]
[DOWN]
1st [UP]
0 : O
1 : B
0 : O
1 : B
0 : O
1 : B
0 : O
1 : B
0 : O
1 : B
0 : O
1 : B
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
#51 Cool
2nd [UP]
[DOWN]
1st [UP]
2nd [UP]
[DOWN]
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
#52 Heat
#53 Fan
[UP]
ON
[DOWN]
21
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61000652C 8400 Tstat Install.indd 21
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QUICK REfERENCE TO CONTROlS & DISplAY
NON-pROgRAmmAblE mODElS (8444, 8446, 8448)
CURRENT INDOOR TEMPERATURE
OUTDOOR TEMPERATURE (OPTIONAL)
TEMPERATURE SETTING
SYSTEM MODE
SETTING
EQUIPMENT STATUS
SYSTEM MODE
FAN SETTING
UP
DOWN
HEAT pUmp mODElS ONlY
EMERGENCY HEAT (RED)
SYSTEM FAULT (YELLOW)
FAN SETTING
INDICATOR SHOWS THROUGH HOUSING
QUICK REFERENCE CARD
BATTERY DOOR
MESSAGE CENTER
LOW BATTERY WARNING
NOTE: BACKLIGHT IS ACTIVATED WITH FIRST BUTTON PRESS AND AUTOMATICALLY TURNS OFF.
22
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61000652C 8400 Tstat Install.indd 22
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QUICK REfERENCE TO CONTROlS & DISplAY
pROgRAmmAblE mODElS (8463, 8465, 8466)
CURRENT INDOOR TEMPERATURE
CURRENT TIME
OUTDOOR TEMPERATURE (OPTIONAL)
TEMPERATURE SETTING
SYSTEM MODE
SETTING
EQUIPMENT STATUS
UP
FAN SETTING
SYSTEM MODE
FAN SETTING
PROGRAM
DOWN
HOLD
HEAT pUmp mODElS ONlY
EMERGENCY HEAT (RED)
SYSTEM FAULT (YELLOW)
CURRENT
SCHEDULE
PERIOD
INDICATOR SHOWS THROUGH HOUSING
QUICK REFERENCE CARD
BATTERY DOOR
MESSAGE CENTER
LOW BATTERY WARNING
NOTE: BACKLIGHT IS ACTIVATED WITH FIRST BUTTON PRESS AND AUTOMATICALLY TURNS OFF.
23
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THERmOSTAT fEATURES
All 8400 SERIES THERmOSTATS
pROgRAmmAblE mODElS ONlY
(8463, 8465, 8466)
• Large, clear, backlit display is easy to read – even
• Separately programmable weekday/weekend
in the dark.
schedules.
• Displays room temperature, temperature setting, and
• Easy to use temperature control can override
optional outdoor temperature.
program schedule at any time.
• Dual power option (Battery or 24 VAC).
• Front battery door access for fast, easy replacement.
• Built in compressor protection.
• Progressive recovery. Progressive Recovery feature
allows the thermostat to activate the heating and
cooling equipment prior to an event in order to reach
the desired temperature at the start of the next
scheduled event.
• Circulation fan mode for air cleaning.
• Water panel, dehumidifier, air filter, and HVAC
service indicators.
• System test mode.
24
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61000652C 8400 Tstat Install.indd 24
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TROUblESHOOTINg
DISplAY IS blANK
HEATINg SYSTEm DOES NOT RESpOND
(“HEATINg” AppEARS ON SCREEN)
• Check circuit breaker and reset if necessary.
• Check for 24 VAC at the equipment on the secondary
side of the transformer between power and
common. If voltage is not present, check the heating
equipment to find the cause of the problem.
• Make sure power switch at heating & cooling
system is on.
• Make sure furnace door is closed securely.
• If thermostat is battery powered, make sure fresh AA
alkaline batteries are correctly installed.
• Check for 24 VAC between the heat terminal (W)
and the transformer common. If 24 VAC is present,
the thermostat is functional. Check the heating
equipment to find the cause of the problem.
TEmpERATURE SETTINgS DO NOT CHANgE
• Check for loose or broken wires between the
thermostat and the heating equipment.
Make sure heating and cooling temperatures are set to
acceptable ranges:
• Heat: 45° to 90°F (7° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
25
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61000652C 8400 Tstat Install.indd 25
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TROUblESHOOTINg
COOlINg SYSTEm DOES NOT RESpOND
HEAT/COOl bOTH ON AT SAmE TImE
(“COOlINg” AppEARS ON SCREEN)
• Check SW1 (Equipment Type), to make sure it is set
to match the installed heating/cooling equipment
(see page 12).
• Check for 24 VAC at the equipment on the secondary
side of the transformer between power and
common. If voltage is not present, check the cooling
equipment to find the cause of the problem.
• Check to make sure heating and cooling wires are
not shorted together.
• Check for 24 VAC between the cooling terminal (Y)
and the transformer common. If 24 VAC is present,
the thermostat is functional. Check the cooling
system to find the cause of the problem.
HEATINg EQUIpmENT IS RUNNINg IN
COOl mODE
• Check SW1 (Equipment Type), to make sure it is set
to match the installed heating/cooling equipment
(see page 12).
• Check for loose or broken wires between the
thermostat and the cooling equipment.
fAN DOES NOT TURN ON IN A CAll fOR HEAT
“HEATINg” IS NOT DISplAYED
• Check System Setting #02 (Fan Control), to make
sure the fan control is properly set to match the type
of system (see page 11).
• Change the System Mode to Heat, and set
the temperature level above the current room
temperature.
HEAT pUmp ISSUES COOl AIR IN HEAT mODE,
OR wARm AIR IN COOl mODE
“COOlINg” IS NOT DISplAYED
• Change the System Mode to Cool, and set
the temperature level below the current room
temperature.
• Check System Setting #12 (Reversing Valve), to make
sure it is properly configured for your system (see
page 11).
26
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SpECIfICATIONS
Environment
Operating: 32° to 120°F (0° to 48.9°C)
Shipping: -30° to 140°F (-34.4° to 60°C)
Temperature
Relative humidity
Operating: 5% to 90% R.H. (non-condensing)
Electrical
Operating voltage
Current
24 VAC (18 – 30 VAC)
Maximum: 2.5A (total), 1.0A (single output)
Maximum surge current: 5A
Dual power. Can be battery or 24 VAC powered.
Power supply
When both the sources are available, battery will be used as
back up power.
Battery power: AA size alkaline battery x 2
Battery life: Approximately 1 year
Battery power
27
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61000652C 8400 Tstat Install.indd 27
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SpECIfICATIONS
Thermal
Outdoor temperature sensor
Maximum distance: 300 feet
Display range: 32° to 99°F (0° to 40°C)
Display range: -20° to 130°F (-30° to 55°C)
Room temperature measurement
Outdoor temperature measurement
Heat: 45° to 90°F (7° to 32°C)
Cool: 50° to 99°F (10° to 37°C)
Temperature setting range
RESEARCH PRODUCTS CORPORATION
P.O. BOX 1467 • MADISON, WI 53701-1467 • www.aprilaire.com
61000652 10.09
B2204777C
28
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