Aprilaire Thermometer 8346 User Manual

Electronic  
Thermostats  
MODEL 8344 HEAT/COOL NON-PROGRAMMABLE  
MODEL 8346 HEAT PUMP NON-PROGRAMMABLE  
MODEL 8348 HEAT/COOL MULTI-STAGE NON-PROGRAMMABLE  
MODEL 8363 HEAT/COOL 5/2 DAY PROGRAMMABLE  
MODEL 8365 HEAT PUMP 5/2 DAY PROGRAMMABLE  
MODEL 8366 HEAT/COOL MULTI-STAGE 5/2 DAY PROGRAMMABLE  
Installation Manual  
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THERMOSTAT INSTALLATION INSTRUCTIONS  
Step1. Choose a location to mount the thermostat  
• Approximately 5 feet off the floor (refer to local codes for compliance with  
the Americans with Disabilities Act).  
• On an interior wall where the temperature is most representative of the  
zone being controlled by the thermostat.  
• At least 18 inches away from an outside wall.  
DO NOT MOUNT THERMOSTAT…  
• Behind doors, in corners or other dead air spaces.  
• In direct sunlight, near lamps  
or other sources of heat.  
Disassemble the Thermostat  
• On an outside wall or any wall  
exposed to an unconditioned  
space (i.e. garage).  
• In the airflow path of a supply  
register or near outside doors.  
• On a wall where concealed  
pipes or ductwork will affect  
the thermostat temperature  
accuracy.  
Step 2. Disassemble  
the thermostat  
• Flip open the cover.  
• Remove the face of the  
thermostat – no tools required.  
Pull Here to Open  
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2
Step 3. Mount the thermostat on the wall  
There are two sets of mounting holes – one set for use when mounting to a  
junction box, another set for direct wall mounting.  
IMPORTANT! TURN OFF POWER AT THE HVAC EQUIPMENT BEFORE  
PROCEEDING WITH THERMOSTAT INSTALLATION!  
Mounting the thermostat directly to the wall (without junction box)  
1. Place the thermostat wire opening over the wall opening. If replacing a  
thermostat, place the thermostat to cover the old thermostat silhouette.  
The base of the thermostat is raised to allow for wire routing behind the  
thermostat.  
2. Level the thermostat (for appearance only) and mark the mounting hole  
locations.  
3. Drill a 3/16” dia. hole at the marked locations and install drywall anchors  
(included). Drywall anchors should be used unless installing on paneling  
or other hard surfaces. Anchors should be flush with the wall surface.  
4. Secure the thermostat to the wall using two (2), #8 x 1-1/2” long pan head  
screws (included).  
Mounting the Thermostat Directly to the Wall (without Junction Box)  
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Mounting the thermostat to a junction box  
1. Install the top j-box screw (not included), until the head is approximately  
1/8” from the surface of the wall.  
2. Slide the thermostat on to the top screw.  
3. Install the bottom screw (not included) to finish the installation.  
Mounting the Thermostat to a Junction Box  
Step 4. Set the ELEC/GAS switch to the proper position  
(Models 8344, 8348,  
8363 and 8366 only)  
Set ELEC/GAS switch  
Setting the switch to  
ELEC will cause the  
G terminal to energize  
with the W terminal  
on a call for heat.  
Only the W terminal  
will energize on a  
heat call in the GAS  
position.  
ELEC  
GAS  
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4
Set the O/B reversing valve jumper in the proper position  
(Models 8346 and 8365 only)  
The thermostat comes with an O/B terminal which can be configured to be  
an ‘O’ terminal (for most heat pumps) or to be a ‘B’ terminal. Configure as an  
‘O’ terminal if the heat pump reversing valve has heating as the default  
position, configure as a ‘B’ terminal if the reversing valve has cooling as the  
default position.  
CONSULT WITH THE HEAT PUMP MANUFACTURER TO DETERMINE WHICH  
CONFIGURATION IS NEEDED.  
O/B Reversing Valve Pin Jumper Position  
To configure as an “O” Terminal,  
keep the pin jumper in this position.  
Remove the slide switch caps  
for easier access.  
To configure as an “B” Terminal,  
move the pin jumper to this position.  
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Step 5. Wire the thermostat  
IMPORTANT! ENSURE THE POWER AT THE HVAC EQUIPMENT IS OFF.  
1. Make sure the fan switch is set to Auto and the Mode switch is set to Off.  
2. Strip 2” of cable insulation.  
3. Strip 1/4” of insulation from each wire. Do not cut into the wire when  
stripping insulation, as this can lead to eventual control failure.  
4. Secure the wires to the thermostat terminal strip according to the wiring  
diagram for the model being installed (See Diagrams 1, 2 & 3). Use a slotted  
screw driver with a 1/8” tip (terminal screw driver). Use color coding  
where possible (i.e. red wire to R terminal, white wire to W terminal, etc.).  
5. Slide excess cable back into the wire entry wall opening and fill the hole  
with insulation. Failure to seal the hole can cause drafts to enter the  
thermostat and effect temperature sensing accuracy.  
Diagram 1 – Model 8344 or 8363 Thermostat Wiring  
FURNACE  
APRILAIRE MODEL 8344  
OR 8363 THERMOSTAT  
1ST  
STAGE  
HEAT  
W1  
Y1  
LO  
W
1ST STAGE COOL  
HI  
FAN  
RELAY  
G
C
R
GAS  
24  
VAC  
ELEC  
Y
120  
VAC  
AUTO  
ON  
G
RC  
RH  
COOLING EQUIPMENT  
1ST  
STG  
COOL  
Y1  
C
HI opens at 100°F 9°F  
LO closes at 41°F 9°F  
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Diagram 2 – Model 8348 or 8366 Thermostat Wiring  
HEAT/BLOWER EQUIPMENT  
2ND  
APRILAIRE MODEL 8348  
OR 8366 THERMOSTAT  
STAGE  
HEAT  
W2  
2ND STAGE  
COOL  
Y2  
1ST  
STAGE  
HEAT  
W2  
W
LO  
HI  
W1  
Y1  
1ST STAGE  
COOL  
FAN  
RELAY  
G
C
R
GAS  
ELEC  
24  
VAC  
Y2  
Y
120  
VAC  
AUTO  
COOLING EQUIPMENT  
2ND  
G
ON  
RC  
RH  
STG  
COOL  
Y2  
Y1  
C
1ST  
STG  
COOL  
HI opens at 100°F 9°F  
LO closes at 41°F 9°F  
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Diagram 3 – Model 8346 or 8365 Thermostat Wiring  
OUTDOOR HEAT PUMP UNIT  
NOTES:  
1. Wire colors shown  
for reference only.  
1ST  
STG  
COMP.  
2. Common (C)  
REV  
VALVE  
connection required  
only for thermostat  
LED operation.  
AUX  
CHECK  
LO  
L
BLU  
W2  
Y
WHT  
YLW  
HEAT/BLOWER EQUIPMENT  
BLU  
ORG  
YLW  
1ST STAGE COMPRESSOR  
Y1  
AUTO  
ON  
AUX.  
HEAT  
G
WHT  
GRN  
BLK  
W2  
GRN  
ORG  
FAN  
RELAY  
G
O/B  
HEAT  
COOL  
C
24  
VAC  
R
C
RED  
BLK  
R
RED  
APRILAIRE MODEL 8346  
OR 8365 THERMOSTAT  
120  
VAC  
SEE NOTE 2  
Step 6. Install supplied batteries  
Install two new AA alkaline batteries (included). Do not mix old and new  
batteries  
Step 7. Reassemble the thermostat  
No tools required – simply snap the thermostat face back on the thermostat.  
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Step 8. Perform check-out  
CAUTION  
The following procedure will turn on the heating and cooling equipment.  
Do not attempt to turn on the cooling equipment when the outdoor  
temperature is too low or the heat pump (heating) when the outdoor  
temperature is too high as compressor damage could occur. Consult the  
equipment manufacturer literature for safe operating temperatures.  
1. Slide the Fan switch to the On position.  
FAN  
The blower should come on. Return the Fan switch  
to the Auto position.  
uto On  
2. Slide the Mode switch to the Heat position.  
3. Use the ADJUST – Up button to raise the  
temperature 2° - 3° above the current room temperature. “HEAT” on the  
display will begin to flash and the heating equipment should start. It may  
take a moment for the heating equipment to initiate the heating cycle. If  
the blower turns on immediately and this is unexpected, make sure the  
GAS/ELEC switch on the thermostat is set correctly (see Step 4, MODELS  
8344, 8348, 8363 & 8366 ONLY).  
MODELS 8346 & 8365 – If cold air is coming out of the registers, the  
reversing valve terminal may need to be configured – see Step 4.  
MODE  
F
Flashes on  
Heat Call  
OVERRIDE  
ROOM  
AM  
SET  
HEAT  
Off Heat  
ADJUST  
SU  
4. MODELS 8348 & 8366 ONLY – Raise the temperature an additional 2°-3°  
and confirm that the second stage of heat (W2) comes on after a 2 minute  
1st stage minimum on-time.  
MODELS 8346 & 8365 ONLY – Raise the temperature an additional 2°-3° and  
confirm that the second stage of heat (W2) comes on in four (4) minutes.  
The green AUX LED located on top of the thermostat will light whenever  
the W2 terminal is energized.  
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5. Return the Mode switch to the Off position to stop the heat call.  
6. Slide the Mode switch to the Cool position.  
7. Use the ADJUST – Down button to lower the temperature 2°-3° below the  
current room temperature. “COOL” on the display will begin to flash and the  
cooling equipment should start.  
MODE  
F
Flashes on  
Cool Call  
OVERRIDE  
ROOM  
AM  
SET  
Cool O
COOL  
ADJUST  
SU  
8. MODELS 8348 & 8366 ONLY – Lower the temperature  
an additional 2°- 3° and confirm that the second  
stage of cooling (Y2) comes on after four (4) minutes.  
MODE  
ol Off Heat  
9. Return the Mode switch to the Off position to stop  
the cool call.  
MODELS 8346 & 8365 ONLY  
10. Slide the Mode switch to the E-Heat position.  
11. Use the ADJUST – Up button to raise the temperature 2°-3° above the  
current room temperature. The W2 and G terminals will energize,  
“E-HEAT” on the display will begin to flash and the heating equipment  
should start.  
MODE  
F
Flashes on  
Heat Call  
OVERRIDE  
ROOM  
AM  
SET  
E-HEAT  
Coeat E-Heat  
ADJUST  
SU  
12. Return the Mode switch to the Off position to stop the heat call.  
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Step 9. Set up temperature scale, differential, offset and  
Water Panel/filter change indicators  
1. Slide the Mode switch to the Off position.  
2. Press and hold both the ADJUST – Up and Down buttons until “ROOM”  
and “OFF” are no longer displayed.  
Press and Hold  
Simultaneously for  
Three (3) Seconds  
ADJUST  
3. °F/°C – Use the ADJUST – Up button to toggle between °F and °C. Press  
the LIGHT button when desired scale has been selected.  
F
C
LIGHT  
ADJUST  
4. Differential Setting (d1) – The unit is shipped with this set to 1(°). This  
refers to how much the temperature will swing during control. Use the  
ADJUST – Up or ADJUST – Down button to change this to 1°, 2° or 3°.  
A higher differential will allow more temperature swing and fewer, longer  
equipment cycles. Press the LIGHT button when the desired differential  
has been set.  
OR  
LIGHT  
ADJUST  
ADJUST  
5. Second Stage Differential Setting (d2 – MODELS 8348 & 8366 ONLY) –  
This setting controls how far from the first stage differential setting the  
temperature will be allowed to fall/rise before initiating second stage.  
OR  
LIGHT  
ADJUST  
ADJUST  
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6. Temperature Offset (OF) – All thermostats are factory calibrated to be  
within 1° of true temperature. Offset is available to allow for agreement  
with field temperature measuring instruments. Use the ADJUST – Up or  
ADJUST – Down button to change the offset value between –4° and +4°.  
Press the LIGHT button when the desired offset value has been set.  
OR  
LIGHT  
ADJUST  
ADJUST  
7. Water Panel Change Indicator Feature – Use this feature if the home has  
a whole house humidifier such as an Aprilaire Humidifier. This feature will  
remind the homeowner when it is time to change the Water Panel. Use  
the ADJUST – Up or ADJUST – Down button to set the number of months  
until the first indication. The first indication should occur in fall (near  
October). The indicator will then show again every 52 weeks to remind the  
homeowner to change the Water Panel in their humidifier. Set the value to  
“OFF” to disable this feature. Press the LIGHT button when the Water  
Panel indicator value has been set.  
CHANGE  
WATER PANEL  
CHANGE  
WATER PANEL  
LIGHT  
ADJUST  
8. Humidifier Type – This feature will only be displayed if the Water Panel  
Change value is not set to “OFF”. Use the ADJUST – Up or ADJUST –  
Down button to set this value to “1” if the home has an Aprilaire Model  
400 whole house humidifier. The Water Panel in the Model 400 should be  
changed twice per season and this feature will cause the Water Panel  
Change Alert to appear on the display 90 days after the first alert. For  
example, if the Water Panel Change Alert value is set to show the first  
alert in October, then a second alert will appear in January. An alert will  
not be displayed again until the next October, and the cycle repeats. Press  
the LIGHT button when the humidifier type value has been set.  
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WATER PANEL  
WATER PANEL  
LIGHT  
ADJUST  
9. Air Filter Change Indicator – Use this feature to remind the homeowner  
when an air filter change is needed. Use the ADJUST – Up and ADJUST –  
Down buttons to select the number of months between recommended  
filter changes. Use 1 or 3 for panel type filters and 6 or 12 for extended  
(pleated) media type filters. TABLE 1 lists general recommendations, refer  
to manufacturer literature for recommendations on the filter in your  
particular application. Set to 12 if the media is original Aprilaire High  
Efficiency Air Cleaner media. Set the value to “OFF” to disable this  
feature. Press the LIGHT button when the air filter indicator value has  
been set. “DONE” will appear on the display and the thermostat will reset.  
CHANGE FILTER  
CHANGE FILTER  
LIGHT  
ADJUST  
TABLE 1  
FILTER TYPE  
CHANGE FREQUENCY  
THERMOSTAT SETTING  
Disable the feature  
OFF  
Disposable Panel  
1 month  
3 months  
1
3
Washable Electrostatic  
Extended Media (Aprilaire)  
6-12 months  
6 or 12  
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10. Weekend Events – Use this feature to set the number of events for the  
weekend program. The default value is 4 events (The ENERGYSTAR®  
setting), which will result in the “LEAVE” and “RETURN” events to be  
used during programmed operation. If the owners schedule is such that  
the home or building is generally occupied during the weekends, switch  
to 2 events on the weekend. This will cause the “LEAVE” and “RETURN”  
events to be ignored during programmed operation. Press the ADJUST –  
Up or ADJUST – Down buttons to toggle between the two selections and  
press the LIGHT button when done. “DONE” will appear on the display  
and the thermostat will reset.  
WAKE  
SLEEP  
WAKE  
LEAVE  
RETURN  
SLEEP  
LIGHT  
SA SU  
SA SU  
ADJUST  
Step10. Set the current time and day of the week  
(MODELS 8363, 8365 & 8366 ONLY)  
Press the CURRENT TIME button to access the clock. Use the ADJUST – Up  
and ADJUST – Down buttons to set the correct hour value. Make sure the  
correct AM/PM designator shows.  
CURRENT TIME  
Make sure  
AM/PM  
is correct  
AM  
[
]
Advance Time  
MO  
ADJUST  
Press the CURRENT TIME button to enter the hours value and access the  
minutes value. Use the ADJUST – Up and ADJUST – Down buttons to set  
the correct value.  
CURRENT TIME  
Adjust Minutes  
AM  
[
]
Advance Time  
MO  
ADJUST  
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Press the CURRENT TIME button to enter the minutes value and access the  
“day of the week” value. Use the ADJUST – Up and ADJUST – Down  
buttons to set the current day of the week.  
CURRENT TIME  
Adjust Day of  
the Week  
AM  
[
]
Advance Time  
MO  
ADJUST  
Press the CURRENT TIME button again to finish. The word “DONE” will  
appear on the display.  
CURRENT TIME  
DONE  
[
]
Advance Time  
As an ENERGYSTAR® partner, the thermostat (Models 8363, 8365 and 8366 only)  
has been pre-programmed with economical times and temperature settings.  
Refer to the Operating Instructions if the program is to be changed.  
P.O. BOX 1467 • MADISON, WI 53701-1467  
Products For Better Indoor Air Quality  
MADE IN USA  
Form No. 5172 09.04  
© 2004 Research Products Corporation  
B2202977A  
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