®
ELECTRONIC THERMOSTATS
MODEL 8353
5-2 Day Programmable
1 Heat / 1 Cool
Electric / Gas
User’s Manual
Installation and
Programming
Installation Guide
IMPORTANT SAFETY INFORMATION WARNING:
Always turn off power at the main power source by unscrewing
fuse or switching circuit breaker to the off position before installing,
removing, cleaning, or servicing thermostat.
•
Read all of the information in this manual before installing or
programming this thermostat.
•
This is a 24V AC low-voltage thermostat. Do not install on voltages
higher than 30V AC.
•
All wiring must conform to local and national building and electrical
codes and ordinances.
•
Do not short (jumper) across terminals on the gas valve or at the
system control to test installation. This will damage the thermostat
and void the warranty.
•
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Figure 1
Installing the Model 8353 Thermostat
NOTE: For new installations, mount thermostat on inside wall, 4-5 feet
above the floor. Do not install behind a door, in a corner, near air vents,
in direct sunlight, or near any heat or steam generating fixtures.
Installation at these places will affect thermostat operation.
1. Turn power off to the heating and cooling systems.
2. Place COOL-OFF-HEAT In OFF position.
COOL-OFF-HEAT
PROG
MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO - ON
FAN: AUTO-ON
3. Place FAN: AUTO–ON switch
Into AUTO position.
4. Remove the cover using a coin
or screwdriver.
Figure 2
5. Place thermostat against the wall at desired location. Make sure
wires will feed through opening on base of thermostat.
6. Mark placement of mounting holes. See Fig. 3. Set base aside.
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Figure 3
MOUNTING HOLES
AM
PM
PROG
RH
RC
MAN
MORN DAY EVE NITE
CHANGE SET
W
Y
AUTO/MAN
Elec
Gas
G
COOL OFF HEAT
FAN AUTO ON
7. Drill the marked holes using a 3/16” drill bit. Note: Enclosed plastic
anchors do not require a drilled hole for drywall.
8. Tap plastic anchors into the wall.
9. Align base with plastic anchors and feed wires through opening.
See Fig 4.
Figure 4
AM
PM
PROG
RH
RC
MAN
MORN DAY EVE NITE
W
CHANGE
SET
AUTO/MAN
Y
Elec
Gas
G
COOL OFF HEAT
FAN AUTO ON
10. Secure base to wall with supplied screws.
11. Connect wires to terminal strip. Refer to wiring diagrams on other
side of this sheet. Make sure wire connections are secure.
12. Place fan option switch into either the “ELEC” or “GAS” position
depending upon the type of furnace. Refer to Figure 5.
Figure 5
FAN
AM
PROG
RH
PM
OPTION
RC
MAN
MORN DAY EVE NITE
CHANGE SET
W
Y
SWITCH
Controls
fan delay.
AUTO/MAN
Elec
Gas
G
COOL OFF HEAT
FAN AUTO ON
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13. Install two “AA” ENERGIZER brand batteries or equivalent into
battery compartment. Be sure to match positive (+) ends of batteries
with positive (+) battery terminals in the battery compartment. The
display will show as follows:
14. Replace cover onto thermostat by snapping into place.
15. Turn on power to system . Test thermostat as described in the
following section.
Programming Guide
Set Time of Day, Day of Week,
Temperature Differential
1. Press & Hold SET. Press PROG/MAN
Release simultaneously.
SET PROG/MAN
PROG
MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO ON
-
2. Press or to change
Time of Day.
3. Press
4. Press
SET
1=MO
2=TU
3=WE
4=TH
5=FR
To Change
Day of Week
6=SA
7=SU
5
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5. Press
6. Press
SET
P
To change
Temperature Differential*
*The Temperature Differential is Factory preset at 1°. This means that
whenever the room temperature changes by one full degree from the
temperature setting, the system will turn on. If the system turns on too
often, increase the temperature differential.
7. Press SET to finish.
Changing Fahrenheit (F) to Celsius (C)
Press and Hold SET
Press
SET
P
Release both simultaneously.
Setting Daily Programming
1. Place COOL-OFF-HEAT switch
in COOL position.
COOL-OFF-HEAT
PROG
MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO ON
-
SET PR
2. Press SET.
3. Press
or
to change
MORN time in 30-minute
intervals.
6
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4. Press SET.
SET PR
PROG
MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO ON
-
5. Press or to change
MORN temperature.
6. Repeat Steps 2-5 for DAY, EVE, and NITE.
7. Press SET to finish.
COOL-OFF-HEAT
8. Shift COOL-OFF-HEAT switch to
HEAT position.
9. Repeat steps 2-7 to program HEAT (winter) settings.
NOTE: Both summer and winter programs use the same time settings.
Your thermostat is now programmed for summer and winter operation.
It will follow the four settings (MORN, DAY, EVE, NITE) for weekday
operation and two settings (MORN and NITE) for weekend operation.
Adjust the program at any time by following the steps as outlined above.
Begin Programmed Operation
1. Place FAN: AUTO–ON switch
Into AUTO.
FAN: AUTO-ON
PROG
MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO ON
-
COOL-OFF-HEAT
SUMMER
WINTER
2. Place COOL-OFF-HEAT switch
Into COOL or HEAT
Depending upon the season.
COOL-OFF-HEAT
3. Press PROG/MAN button
until indicator is in PROG position.
ET PROG/MAN
PROG
MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO ON
-
PROG
MAN
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Temporary Program Override
To temporarily increase or decrease temperature
Press or
PROG
MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO ON
-
The thermostat will automatically return
to the program at the next scheduled
setting change or after four hours.
Manual Operation
Manual operation allows continuous override of the program settings.
1. Press PROG/MAN until indicator is in MAN position.
PROG
MAN
PROG
MAN
T
PROG/MAN
SET PROG/MAN
COOL-OFF-HEAT
FAN: AUTO ON
-
2. Press
or to adjust
temperature settings.
Reset
To reset the thermostat to factory pre-programmed
conditions, press the reset button located directly
to the right of the display.
RESET
BUTTON
AM
PM
PROG
RH
RC
MAN
MORN DAY EVE NITE
W
CHANGE
SET
AUTO/MAN
Y
Elec
Gas
G
COOL OFF HEAT
FAN AUTO ON
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To Test Thermostat
WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS
VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL DAM-
AGE THE THERMOSTAT AND VOID YOUR WARRANTY.
CAUTION: Do not switch system to cool if the temperature is below
50°F (10°C). This can damage the air conditioning system and cause
personal injury.
COOL-OFF-HEAT
1. Place the COOL-OFF-HEAT
switch into the COOL position
2. Press the button until the temperature
setting is at least 3 degrees below the room temperature. The
air conditioning system should turn on within a few seconds.
NOTE: There is a built in 5-minute delay on break for compressor
protection. A second attempt to turn on the air conditioning will
result in a 5-minute delay in compressor activation.
COOL-OFF-HEAT
3. Put the COOL-OFF-HEAT switch into
the OFF position. The air conditioning
system should turn off. The fan may
continue to run for a short period of time.
COOL-OFF-HEAT
4. Put the COOL-OFF-HEAT switch
into the HEAT position.
5. Press the button until the temperature setting is at least
3 degrees above room temperature. The heating system should
turn on. The fan may not turn on immediately, depending upon
the fan delay built into the furnace.
COOL-OFF-HEAT
6. Put the COOL-OFF-HEAT switch
into the OFF position. The heating
system should turn off. Once again,
the fan may have a delay.
7. Put the FAN: AUTO–ON switch
FAN: AUTO - ON
to the ON position. The blower
fan should turn on.
8. Put the FAN: AUTO–ON switch
FAN: AUTO-ON
to the AUTO position. The blower
fan should turn off.
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Troubleshooting
Symptom
Remedy
Thermostat does not turn
on system
Check Wiring
(see INSTALLATION).
Check fuse. Replace with 2 amp
Slo-Blo fuse if fuse has opened.
Thermostat turns on and off too
frequently.
Increase Temperature Differential
(see PROGRAMMING).
Display is blank, flashing or
constant “LO BAT.”
Replace batteries.
Weekend Program follows four
adjustment settings.
Verify that day of week is set
correctly (see PROGRAMMING).
System fan does not operate
properly.
Move fan option switch to either
gas or electric, to match system
(see INSTALLATION).
Time shown on display is not the
current time of day.
Change time of day setting
(see PROGRAMMING).
Thermostat does not
follow program.
Thermostat in MANUAL mode
(see PROGRAMMING).
Thermostat may not have been
programmed in HEAT or COOL
position. Verify program.
Check AM/PM indicators at time
of day and programmed time
changes (see PROGRAMMING).
Verify program and day of week
is correct (see PROGRAMMING).
If problems with thermostat cannot be solved, call:
Technical Support: 608-257-8801
Monday-Friday 7:45 am - 5:00 pm CST
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Wiring Diagrams
The following is just a sample of the most common types of HVAC sys-
tems. Refer to your systems installation manual for wiring information.
HEAT ONLY
3-WIRE
SINGLE TRANSFORMER
HEAT/COOL
4-WIRE
SINGLE TRANSFORMER
Factory- Installed
jumper
Factory-Installed
jumper
T
T
RH
RH
H
E
R
M
O
S
T
H
E
R
M
O
S
T
Transformer
Hot
Transformer
Hot
RC
W
RC
W
24 VAC
120 VAC
24 VAC
120 VAC
Heating
Control
Heating
Control
Cooling
Control
Y
Y
A
T
A
T
Fan
Control
Fan
Control
G
G
HEAT ONLY
2-WIRE
COOL ONLY
3-WIRE
SINGLE TRANSFORMER
SINGLE TRANSFORMER
NOTE: Remove factory
installed jumper
NOTE: Remove factory
installed jumper
T
RH
T
H
E
R
M
O
S
T
RH
H
E
R
M
O
S
T
Transformer
Hot
Transformer
Hot
RC
W
RC
W
24 VAC
120 VAC
24 VAC
120 VAC
Heating
Control
Y
Cooling
Control
Y
A
T
A
T
Fan
Control
G
G
HEAT
5-WIRE
TWO TRANSFORMER
/COOL
NOTE: Cut center of
factory installed jumper
and bend back
(HEATING)
Transformer
Hot
T
H
E
R
M
O
S
T
RH
RC
120 VAC
24 VAC
NOTE: Both transformers
must be in phase.
Heating
Control
W
Y
Cooling
Control
Hot
A
T
120 VAC
24 VAC
Fan
Control
G
(COOLING)
Transformer
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Limited Warranty
Your Research Products Corporation Aprilaire® Thermostat unit is expressly
warranted for two (2) years from date of installation to be free from defects in
materials and workmanship.
Research Products Corporation’s exclusive obligation under this warranty shall
be to supply, without charge, a replacement for any thermostat which is found
to be defective within a two (2) year period and which is returned, together with
the date of installation, no later than thirty (30) days after said two (2) year
period by you to either your original supplier or to Research Products
Corporation, Madison, Wisconsin 53701.
THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPO-
RATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN
WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER AS CON-
TRASTED TO DEFECTS IN THE THERMOSTAT ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PAR-
TICULAR PURPOSE SHALL BE LIMITED IN DURATION TO THE AFORESAID
TWO YEAR PERIOD. RESEARCH PRODUCTS CORPORATION’S LIABILITY
FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, OTHER THAN DAMAGES
FOR PERSONAL INJURIES, RESULTING FROM ANY BREACH OF THE AFORE-
SAID IMPLIED WARRANTIES OR THE ABOVE LIMITED WARRANTY IS
EXPRESSLY EXCLUDED. THIS LIMITED WARRANTY IS VOID IF DEFECT(S)
RESULT FROM FAILURE TO HAVE THIS THERMOSTAT INSTALLED BY A
QUALIFIED HEATING AND AIR CONDITIONING CONTRACTOR. IF THE
LIMITED WARRANTY IS VOID DUE TO FAILURE TO USE A QUALIFIED
CONTRACTOR, ALL DISCLAIMERS OF IMPLIED WARRANTIES SHALL BE
EFFECTIVE UPON INSTALLATION.
Some states do not allow limitations on how long an implied warranty lasts or
the exclusion or limitation of incidental or consequential damages, so the
above exclusion or limitations may not apply to you.
This warranty gives you specific legal rights and you may also have other rights
which vary from state to state.
P.O. BOX 1467 • MADISON, WI 53701-1467
™
Products For Better Indoor Air Quality
B2202517 REV. 12/00
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