Aprilaire 8476 Specifications

Model 8476 Thermostat with
Event-Based™ Air Cleaning
Safety &
Installation
Instructions
READ AND SAVE THESE INSTRUCTIONS
Table of contents
Installation
Installation
Installation location recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor temperature sensor (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power & reset options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation location recommendations
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4
5
5
6
7
Setup & Testing
Thermostat should be mounted:
Do not mount thermostat:
• On an interior wall, in a frequently occupied space.
• Behind doors, in corners, or other dead air spaces.
• Approximately 5‘ above floor.
• At least 18” from outside wall.
• In direct sunlight, near lighting fixtures, or other
appliances that give off heat.
• Thermostat can be mounted to a vertical junction box.
• 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.
System setup instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
System test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
References
Quick reference to controls & display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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22
3
Installation
Installation
Outdoor temperature sensor (optional)
Thermostat mounting
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).
Heat pump applications 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’.
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.
• Mount above snow line.
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.
• 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.
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. P ull 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).
RC R
4
W
Y G
C S1 S2 O/B L W2 Y2
5. Place back over anchors, insert and tighten screws.
6. Seal wire entry holes to prevent drafts affecting
temperature readings.
5
Installation
Wiring terminal
Wiring – single Transformer (use
Jumper Wire) for HEAT/COOL System
NOT USED
2nd HEATING
G
2nd COOLING
Y
NOT USED
W
OUTDOOR TEMP
SENSOR
COOLING
TRANSFORMER
2nd HEATING
2nd COOLING
G
NOT USED
Y
C S1 S2 O/B L W2 Y2
RC R
6
W
FAN
Y G
1st HEATING
W
1st COOLING
RC R
NOT USED
*Jumper between RC & R is used in single transformer systems
(see wiring diagrams).
OUTDOOR TEMP
SENSOR
• Push the excess wire back into the opening and plug
the wall opening to prevent drafts.
FAN
• Loosen screw terminals, insert stripped wire and
re-tighten.
1st HEATING
• Ensure power at the HVAC equipment is off.
1st COOLING
Installation notes
RC – 24 VAC supply cooling*
R – 24 VAC supply heating*
W – 1st stage heat / auxiliary
Y – 1st stage cooling / compressor
G – Fan
C – Common (optional when powered by batteries)
S1 & S2 – outdoor temperature sensor (optional)
O/B – Reversing valve
L – System fault indicator
W2 – 2nd stage heat / auxiliary
Y2 – 2nd stage cooling / compressor
JUMPER
18-24 gauge thermostat wire
TRANSFORMER
Wire specifications
Wiring – TWO TransformerS (REMOVE
Jumper Wire) for HEAT/COOL System
HEATING
TRANSFORMER
Installation
C S1 S2 O/B L W2 Y2
RC R
C S1 S2 O/B L W2 Y2
7
Installation
Setup & Testing
System setup instructions
Wiring – TWO TransformerS (REMOVE
Jumper Wire) for HEAT Pump System
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 based on other setting values.
HEATING
TRANSFORMER
Wiring – single Transformer (use
Jumper Wire) for HEAT PUMP System
How to enter the system setup menu to change
system settings
repeatedly until system is set to OFF.
Press and hold
and
for three seconds.
2nd COMPRESSOR
FAULT DETECT
2nd AUX HEATING
REVERSE VALVE
OUTDOOR TEMP
SENSOR
FAN
1st AUX HEATING
The screen of the first setting will be displayed.
1st COMPRESSOR
HEAT PUMP
TRANSFORMER
2nd COMPRESSOR
FAULT DETECT
2nd AUX HEATING
REVERSE VALVE
OUTDOOR TEMP
SENSOR
FAN
1st AUX HEATING
1st COMPRESSOR
JUMPER
HEAT PUMP
TRANSFORMER
Press
Press
or
Press
to change to the next option.
Press
displayed.
after the last setting. “DONE” will be
to change the setting.
The thermostat will return to Normal mode if no button
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
RC R
8
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
Setup & Testing
Setup & Testing
System setup instructions (continued)
System setup instructions (continued)
The Model 8476 thermostat has 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
10
System setting
Setting range, default in bold
00 Equipment type (Set by SW1)
0 : heat/cool
1 : heat pump
01 Temperature scale
0 : Fahrenheit
1 : Celsius
02 Fan control in heating
0 : Gas or oil furnace (Equipment controls fan)
1 : Electric (Thermostat controls fan)
03 Offset temperature for internal sensor
0° : No offset applied
–4°F to +4°F (–2°C to +2°C)
04 Auto mode
0 : Auto mode is disabled
1 : Auto mode is enabled
05 Outdoor temperature sensor
0 : No outdoor temperature sensor attached
1 : Outdoor temperature sensor attached
06 Compressor minimum off time
5 minutes
1 to 5 minutes in 1 minute steps
07 Heating minimum off time
2 minutes
1 to 5 minutes
08 Equipment minimum on time
2 minutes
1 to 5 minutes
11
Setup & Testing
Setup & Testing
System setup instructions (continued)
System setup instructions (continued)
System setting
Setting range, default in bold
System setting
Setting range, default in bold
09 1st stage differential
1°F (0.5°C)
1°F to 4°F (0.5°C to 2°C)
16 Low Balance Pt. (heat pump only)
20°F (–7°C)
1°F to 35°F (–17°C to 1°C) or “OFF” to disable
10 2nd stage differential
1°F (0.5°C)
1°F to 4°F (0.5°C to 2°C)
17 High Balance Pt. (heat pump only)
11 3rd stage differential (heat pump only)
1°F (0.5°C)
1°F to 4°F (0.5°C to 2°C)
19 Program format
0 – 5/2 program (Weekdays and Weekends)
1 – 5/1/1 program (Weekdays, Sat. and Sun.)
12 Reverse valve (heat pump only)
0 – O/B energized in cooling (O)
1 – O/B energized in heating (B)
20 Change air filter
OFF
1, 3, 6, 12 months or “OFF” to disable
13 Integral factor period (P+I control)*
Set to OFF for proportional control only
4 minutes
1 to 5 minutes or “OFF” to disable
14 Deadband (auto mode)
3°F (2°C)
2°F to 5°F (1°C to 3°C)
15 Progressive recovery
0 : Progressive recovery is disabled
1 : Progressive recovery is enabled
*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.)
12
System setting 05 must be enabled
System setting 05 must be enabled
21 Change water panel**
Set number of months until reminder is required
22 Humidifier type**
60°F (16°C)
40°F to 80°F (4°C to 27°C) or “OFF “ to disable
OFF
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)
**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.
13
Setup & Testing
Setup & Testing
System test mode
System test mode (continued)
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 the output status for each test step for Heat/Cool and
Heat Pump mode.
How to enter the system test menu
Press
repeatedly until system is set to OFF.
Press and hold
and
for three seconds.
The screen of the first test step #50 is displayed:
The test steps are:
Test Number
Heat/Cool
Heat Pump
50
Heating (W) (W2)
Aux Heating (W) (W2)
51
Cooling (Y) (Y2)
Compressor Cooling (Y) (Y2)
52
Fan (G)
Compressor Heating (Y) (Y2)
53
14
Fan (G)
Press
to turn on the output (01). For multi stage
output, press
again to turn on the 2nd stage (02).
Press
to turn off the output (00).
Press
to change to the next test step.
Press
displayed.
after the last test step. “DONE” will be
The thermostat will return to Normal mode if no button is
pressed in 3 seconds.
SYSTEM TEST
NUMBER
FLASHES IF 24VAC
IS NOT PRESENT
MODE (SW1 SETTING)
OUTPUT STATUS
15
Setup & Testing
Setup & Testing
Test steps for Heat/Cool
System Setting
Step
Key Input
1st [UP]
#50 Heat
#51 Cool
#52 Fan
2nd [UP]
[DOWN]
1st [UP]
2nd [UP]
[DOWN]
[UP]
[DOWN]
#2
0 : Gas
1 : Elec
0 : Gas
1 : Elec
01
HEATING
ON (W)
ON
ON
ON
ON
02
HEATING
ON (W2)
ON
ON
Test steps for Heat Pump
Display (Output) 02
01
COOLING
COOLING
ON (Y2)
ON (Y)
ON
ON
ON
System Setting
01
FAN ON
(G)
ON
ON
ON
ON
ON
Step
#50 Aux
#51 Cool
#53 Fan
#2
[DOWN]
0 : Gas
1 : Elec
0 : Gas
1 : Elec
1st [UP]
2nd [UP]
[DOWN]
1st [UP]
2nd [UP]
[DOWN]
[UP]
[DOWN]
1st [UP]
#52 Heat
16
Key Input
2nd [UP]
#12
0:O
1:B
0:O
1:B
0:O
1:B
0:O
1:B
0:O
1:B
0:O
1:B
01 AUX
HEATING
ON (W)
ON
ON
ON
ON
02 AUX
HEATING
ON (W2)
ON
ON
Display (Output)
02
01
COOL/HEAT COOL/HEAT
ON (Y2)
ON (Y)
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
01
FAN ON
(G)
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
O/B
ON
ON
ON
ON
ON
ON
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Quick Reference to controls & Display
Current Indoor Temperature
Current Time
Thermostat Features
Outdoor Temperature (OPTIONAL)
System Mode
Setting
Temperature SetTING
Equipment Status
clean air
Setting
UP
System Mode
down
clean air
Hold
Program
HEAT PUMP ONLY
Includes Event-Based ™ Air Cleaning
Emergency heat (RED)
System FAULT (YELLOW)
• Event-Based™ Air Cleaning.
• Large, clear, backlit display is easy to read – even in the dark.
• Displays room temperature, temperature setting, and optional outdoor temperature.
• Dual power option (Battery or 24 VAC).
• Front battery door access for fast, easy replacement.
• Built in compressor protection.
• Water panel and air filter service indicators.
• System test mode.
• Separately programmable weekday/weekend schedules.
• Easy to use temperature control can override program schedule at any time.
• 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.
Indicator shows through housing
Quick Reference Card
Battery Door
Current Schedule Period
Message Center
Low Battery Warning
Note: BACKLIGHT IS ACTIVATED WITH FIRST BUTTON PRESS AND AUTOMATICALLY TURNS OFF.
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Troubleshooting
Display is blank
• Check circuit breaker and reset if necessary.
• 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.
Temperature settings do not change
Make sure heating and cooling temperatures are set to
acceptable ranges:
Troubleshooting
Heating system does not respond
(“HEATING” appears on screen)
Cooling system does not respond
(“COOLING” appears on screen)
• 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.
• 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 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.
• 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.
• Check for loose or broken wires between the
thermostat and the heating equipment.
• Check for loose or broken wires between the
thermostat and the cooling equipment.
• Heat: 45° to 90°F (7° to 32°C).
Fan does not turn on in a call for heat
• Cool: 50° to 99°F (10° to 37°C).
• Check System Setting #02 (Fan Control), to make
sure the fan control is properly set to match the type
of system (see page 11).
Heat pump issues cool air in heat mode,
or warm air in cool mode
• Check System Setting #12 (Reversing Valve), to make
sure it is properly configured for your system (see
page 12).
20
Heat/cool both on at same time
• Check SW1 (Equipment Type), to make sure it is set
to match the installed heating/cooling equipment
(see page 11).
• Check to make sure heating and cooling wires are
not shorted together.
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 11).
“HEATING” is not displayed
• Change the System Mode to Heat, and set
the temperature level above the current room
temperature.
“COOLING” is not displayed
• Change the System Mode to Cool, and set
the temperature level below the current room
temperature.
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Specifications
Specifications
Environment
Temperature
Relative humidity
Thermal
Operating: 32° to 120°F (0° to 48.9°C)
Outdoor temperature sensor
Maximum distance: 300 feet
Shipping: -30° to 140°F (-34.4° to 60°C)
Room temperature measurement
Display range: 32° to 99°F (0° to 40°C)
Operating: 5% to 90% R.H. (non-condensing)
Outdoor temperature measurement
Display range: -20° to 130°F (-30° to 55°C)
Temperature setting range
Electrical
Operating voltage
Current
Heat: 45° to 90°F (7° to 32°C)
Cool: 50° to 99°F (10° to 37°C)
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
Battery power
22
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
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P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357
www.aprilairepartners.com
61000893 12.11
B2205693A
24
Patent Pending
© 2011 Aprilaire – A division of Research Products Corporation