Aprilaire 8365 User manual

READ AND SAVE THESE INSTRUCTIONS
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
Electronic
Thermostats
Operating Instructions

PRODUCT FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
GETTING FAMILIAR WITH YOUR APRILAIRE THERMOSTAT . . . . . . . . . . . . . . .3
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Temporarily Raise and Lower Temperature . . . . . . . . . . . . . . . . . . . . . . . . .4
Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Programming Your Thermostat (Programmable Models Only) . . . . . . . .5
• Set Current Time and Day . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
• Program for Heating and Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
• Program Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
• To Change the Heating Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
• To Change the Cooling Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Hold Temperature/Vacation (Programmable Models Only) . . . . . . . . . . .7
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Cleaning the Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
SET UP INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
To Clear the “Change Water Panel” or “Change Filter” Indicator . . . . .9
To Change °F to °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
To Change Differential Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
To Change Temperature Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
To Change the Water Panel Indicator Setting . . . . . . . . . . . . . . . . . . . . . .12
To Set Humidifier Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
To Change the Air Filter Indicator Setting . . . . . . . . . . . . . . . . . . . . . . . . . .13
To Set Number of Weekend Events (Programmable Models Only) . . .14
LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
1
TABLE OF CONTENTS

ENERGYSTAR®PROGRAM INFORMATION (Programmable Models Only)
About half of all energy used by households goes to heating and cooling the
home. If you’ve selected a programmable Aprilaire®Electronic Thermostat,
you have made a significant step toward conserving energy usage and
costs, while improving your indoor comfort.
In fact, the Aprilaire Electronic Thermostat Models 8363, 8365 & 8366 have
earned the “ENERGYSTAR®” designation of the U. S. Environmental Protection
Agency (EPA). This means that your Aprilaire Thermostat is a highly efficient,
cutting edge product that is good for the environment. It saves energy and
costs less to operate than similar products that do not qualify for the
ENERGYSTAR label.
ENERGYSTAR products help you differentiate between standard efficiency and
high efficiency products. By using ENERGYSTAR products, you are helping to
prevent air pollution while saving money on your utility bills.
According to the EPA, taking advantage of the times that a home is
unoccupied or the occupants are asleep, an ENERGYSTAR thermostat can
reduce heating and cooling bills by as much as 30%. The Aprilaire
Thermostat has programmable capabilities that allow you full flexibility to
set your heating and cooling systems to meet your comfort and energy
needs. As an ENERGYSTAR partner, Aprilaire has determined that this product
meets the ENERGYSTAR guidelines for energy efficiency.
PRODUCT FEATURES
• Large, easy to read, backlit display.
• Simple programming with 4 events
for weekdays and selectable 2 or 4
events on the weekend.
• Pre-programmed with ENERGYSTAR‚
recommended settings.
• Set point and room temperature
are displayed simultaneously.
• Freeze protection.
• Low battery indicator.
• High temperature protection
(Models 8344, 8348, 8363 and 8366).
• Temporary and permanent
(vacation) hold.
• Change Water Panel indicator.
• Change air filter indicator.
• Fahrenheit/Celsius selectable.
• Adjustable differential.
• Adjustable offset.
2

3
GETTING FAMILIAR WITH YOUR APRILAIRE THERMOSTAT
CURRENT TIME
[Advance Time]
PROGRAM
[Advance Program]
ADJUST
LIGHT
FAN
MODE
HOLD
Auto •On
Cool •Off •Heat •E-Heat
[Resume]
WATER PANEL
LOW BATTERY
HOLD
CHANGE FILTER
E-HEAT
COOL
DONE
C
RETURN
MO TU WE TH FR SA SU
OVERRIDE
SLEEP
ROOM
AM
PM
LEAVE
WAKE
F
SET
AUX CHECK
Auxiliary Heat Light
(Models 8346 &
8365 only)
Check Equipment Light
(Models 8346 & 8365 only) Large, Backlit Display
Set Time –
Hour, AM/PM,
Minute, Day
Events –
Temperature
and Time
Use to change
time and
temperature
values when
programming
or setting the
time of day.
Use to raise or
lower the heating
or cooling set
point in normal
operation.
Activates
Back Light
Fan Switch –
“Auto” operates the fan with
heating and cooling equipment.
“On” operates the fan continuously.
Mode Switch –
Cool, Off, Heat,
E-Heat (Emergency
Heat for Models
8346 & 8365 only)
Press to Hold
temperature.
Press again to
Resume program
PROGRAMMABLE MODELS ONLY
Figure 1
WATER PANEL
LOW BATTERY
HOLD
CHANGE FILTER
E-HEAT
COOL
DONE
C
RETURN
MO TU WE TH FR SA SU
OVERRIDE
SLEEP
ROOM
AM
PM
LEAVE
WAKE
F
SET
Program
Done Change Filter
Indicator
Fahrenheit
or Celsius
Current Room
Temperature
Change Water
Panel Indicator
Change Battery
Indicator
Hold Temperature
Current
Temperature
Setting
Cool, Heat, E-Heat
(Emergency Heat
Models 8346 & 8365 only)
Day of Week
Event
Temporary
Override
Current
Time
PROGRAMMABLE MODELS ONLY
Figure 2
See Figure 1 for a description of the thermostat and controls.
See Figure 2 for the display.

OPERATING MODES
Your thermostat has three operating modes, COOL, OFF and HEAT. Heat pump
Models 8346 & 8365 have an additional EMERGENCY HEAT mode (E-HEAT on
display).
TEMPORARILY RAISE AND LOWER TEMPERATURE –
MODELS 8344, 8346 & 8348
1. Press  to ADJUST the temperature.
TEMPORARILY RAISE AND LOWER TEMPERATURE –
MODELS 8363, 8365 & 8366
1. Press  to ADJUST the temperature. The “OVERRIDE” icon will appear.
The new temperature setting will hold until the next programmed event.
2. Press HOLD twice to resume program.
4
OPERATING INSTRUCTIONS
COOL
In the COOL mode, the thermostat
will control the cooling system and
maintain your cooling set point.
NOTE: There is a 4-minute delay
after a cooling call is completed.
This is to protect the equipment’s
compressor from short cycling.
OFF
In the OFF mode, the thermostat
will not operate the heating or
cooling equipment. The FAN switch
can be placed in the ON position to
operate the fan continuously.
CAUTION: Do not set to OFF
mode during periods when freezing
temperatures may occur.
HEAT
In HEAT mode, the thermostat will
control the heating system.
NOTE: There is a 4-minute delay
after a heating call is completed on
heat pump models 8346 & 8365. This
is to protect the equipment’s
compressor from short cycling.
E-HEAT (MODELS 8346 & 8365 ONLY)
In E-HEAT mode, the thermostat will
activate the emergency heat with
any heat call. (Note-the AUX light in
the upper left hand corner of the
thermostat will illuminate any time
there is a call for Emergency Heat
or Auxiliary Heat. )

ENERGYSTAR SETTINGS
Event Temperature Time Schedule
Setting Weekday Weekend
Wake Heat = 70°F 6:00 AM 6:00 AM
Cool = 78°F
Leave Heat = 62°F 8:00 AM 8:00 AM
Cool = 85°F
Return Heat = 70°F 5:00 PM 5:00 PM
Cool = 78°F
Sleep Heat = 62°F 10:00 PM 10:00 PM
Cool = 82°F
FAN OPERATION
The thermostat has two settings for fan operation, AUTO and ON.
PROGRAMMING YOUR THERMOSTAT – MODELS 8363, 8365 & 8366
SET CURRENT TIME AND DAY
1. Press CURRENT TIME and use the  to ADJUST the current hour.
IMPORTANT: ADJUST HOUR TO APPROPRIATE AM/PM SETTING.
NOTE: The flashing information is being adjusted.
2. Press CURRENT TIME again to advance to and ADJUST the current minutes.
3. Press CURRENT TIME again to advance to and ADJUST the current day.
4. Press CURRENT TIME again to finish. “DONE” will appear on the display
when you have completed setting the time and day.
PROGRAM FOR HEATING AND COOLING
As part of the ENERGYSTAR program, your thermostat has been
pre-programmed with the following times and temperatures, which can be
modified as desired (see page 7).
5
AUTO
In the AUTO setting, the fan
operates only when the heating or
cooling equipment is on.
ON
In the ON setting, the fan will
operate continuously.

PROGRAM EVENTS
Your thermostat has 5/2 (5 weekdays and 2 weekend days) programming
functionality, which allows the user to set four events for the weekdays
(Monday through Friday) and two or four events for the weekend (Saturday
and Sunday). The events are WAKE, LEAVE, RETURN and SLEEP. If you are
normally home on the weekend, you can set up your thermostat to use only
2 events (WAKE and SLEEP) on Saturday and Sunday.
WAKE is the time and temperature setting you desire when you wake in the
morning. The event should include extra time for the heating and cooling
equipment to heat or cool the house to a comfort level prior to getting out of bed.
NOTE: It will take some time for your heating or cooling system to reach
the desired temperature when returning from setback. Therefore, it is
suggested you set your program time before the actual time you want
your home to reach the desired temperature. For example, if you get up at
7:00 AM and have a 6 degree setback, set your WAKE event to 6:00 AM
to be sure the desired temperature is reached by 7:00 AM.
LEAVE is the time and temperature setting for the daytime hours you are
away from the house and wish to reduce the heating or increase the cooling
temperature for energy savings.
RETURN is the time and temperature setting for the evening hours.
SLEEP is the time and temperature setting for your sleep hours.
6

TO CHANGE THE HEATING PROGRAM
TO CHANGE THE COOLING PROGRAM
1. Move the MODE switch to the COOL position.
2. Repeat the steps above to Program for cooling.
HOLD TEMPERATURE / VACATION – MODELS 8363, 8365 & 8366
When the thermostat is in HOLD the set point will be maintained until the
HOLD/Resume button is pressed.
1. Press the HOLD button. The “HOLD” icon will appear on the display and
the time and day will disappear.
2. Press the
 to ADJUST the temperature.
3. Pressing HOLD again will resume program.
7
WAKE – WEEKDAY
1. Move the MODE switch to the
HEAT position.
2. Press the PROGRAM button and
then
 to ADJUST the
weekday WAKE time.
3. Press the PROGRAM button again
to advance to and adjust the
WAKE temperature.
LEAVE – WEEKDAY
4. Press the PROGRAM button and
then
 to ADJUST the
weekday LEAVE time.
5. Press the PROGRAM button again
to advance to and adjust the
LEAVE temperature.
RETURN – WEEKDAY
6. Press the PROGRAM button and
then
 to ADJUST the
weekday RETURN time.
7. Press the PROGRAM button again
to advance to and adjust the
RETURN temperature.
SLEEP – WEEKDAY
8. Press the PROGRAM button and
then
 to ADJUST the
weekday SLEEP time.
9. Press the PROGRAM button again
to advance to and adjust the
SLEEP temperature.
WEEKEND – 2 or 4 Events
(See page 14)
10. Repeat the weekday steps for
the weekend events.
11. Press PROGRAM again to exit
programming. DONE will appear
on the display.

BATTERY REPLACEMENT
NOTE: New batteries must be replaced within one minute after removal of
old batteries. If more than one minute elapses the programmed settings will
be lost and revert to the factory settings. See Figures 3 and 4 for cover
removal and battery orientation.
Replace batteries once per year or when “LOW BATTERY” appears on the
display. This will keep the thermostat working properly. Replace with two
new AA alkaline batteries.
8
1. Move FAN switch to AUTO setting.
2. Move MODE switch to OFF
position.
3. Remove housing by gently pulling
the housing from the base.
See Figure 3.
4. Insert new batteries as shown.
5. Replace housing.
6. Return FAN and MODE switch
to desired position.
7. Check to see the correct time
and day appear on the display.
If more than one minute has
elapsed, the thermostat will
require re-programming.
AA Alkaline Battery
-+-+
Figure 4 – Battery Orientation
Pull Here to Open
Figure 3 – Cover Removal

CLEANING THE THERMOSTAT
If the surface of the thermostat becomes dirty it can be cleaned with plain
water or a non-abrasive household cleaner including glass cleaner. When
using any cleaner, be careful not to get any into the interior of the
thermostat. Do not spray any liquid directly onto the thermostat. Spray the
cleaner on to a soft cloth and wipe the surface of the thermostat.
TO CLEAR THE “CHANGE WATER PANEL” OR
“CHANGE FILTER” INDICATOR
Your thermostat is equipped with indicators on the display to notify you when
it is necessary to change the systems filter and humidifier Water Panel.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until the alert clears from the display.
3. Thermostat will clear the change Water Panel or change air filter indicator.
TO CHANGE °F TO °C
The Aprilaire Thermostat is capable of displaying temperatures in
Fahrenheit or Celsius.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed.
9
SET UP INSTRUCTIONS
MODE
Cool •Off •Heat
ADJUST
Press and Hold
Simultaneously for
Three (3) Seconds
MODE
Cool •Off •Heat ADJUST
Press and Hold
Simultaneously for
Three (3) Seconds

3. Display will show only the room temperature and scale. Use the  or
 button to toggle between Fahrenheit (F) or Celsius (C).
4. Press the LIGHT button repeatedly until “DONE” is displayed.
TO CHANGE DIFFERENTIAL SETTING (d1)
The Aprilaire Thermostat is capable of adjusting the differential to change
how often the heating and cooling equipment will cycle on and off.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed.
3. Press the LIGHT button until “d1” is displayed.
4. Thermostat will display “d1” and a number 1, 2 or 3. The number indicates
the degrees from setpoint before a call for heating or cooling is made.
5. Use the
 buttons to select 1, 2 or 3 degrees.
6. Press the LIGHT button repeatedly until “DONE” is displayed.
TO CHANGE 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.
10
F
C
LIGHT
ADJUST
LIGHT
ADJUST
OR
ADJUST
MODE
Cool •Off •Heat ADJUST
Press and Hold
Simultaneously
LIGHT

1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed.
3. Press the LIGHT button until “d2” is displayed.
4. Thermostat will display “d2” and a number 1, 2 or 3. The number indicates
the degrees from the first stage differential setting (d1) before a call for
heating or cooling is made.
5. Use the
 buttons to select 1, 2 or 3 degrees.
6. Press the LIGHT button repeatedly until “DONE” is displayed.
TO CHANGE TEMPERATURE OFFSET
Aprilaire thermostats are factory tested and calibrated within 1° Fahrenheit.
However, it may be desirable to adjust the reading of the thermostat to
coincide with other temperature measuring devices.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed.
3. Press the LIGHT button until “OF” is displayed.
4. Press the
 and  buttons to raise or lower the displayed
temperature. The thermostat will indicate the number of degrees
above or below actual temperature of adjustment.
11
LIGHT
ADJUST
OR
ADJUST
MODE
Cool •Off •Heat
ADJUST
Press and Hold
Simultaneously
LIGHT
MODE
Cool •Off •Heat
ADJUST
Press and Hold
Simultaneously for
Three (3) Seconds
LIGHT

5. Press the LIGHT button repeatedly until “DONE” is displayed.
TO CHANGE THE WATER PANEL INDICATOR SETTING
The Aprilaire Thermostat is capable of indicating when the Water Panel of a
humidifier should be changed.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed.
3. Press the LIGHT button several times until “CHANGE WATER PANEL” is
displayed on the thermostat.
4. Use the
 and  buttons to select between 1to 12 or OFF. This is the
number of months until the “CHANGE WATER PANEL” reminder will first
be displayed. Subsequently, it will be displayed every 52 weeks.
5. Press the LIGHT button repeatedly until “DONE” is displayed.
TO SET HUMIDIFIER TYPE
NOTE: This feature will only be displayed if the Water Panel Change value is
not set to “OFF”.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed. 12
LIGHT
ADJUST
OR
ADJUST
LIGHT
ADJUST
WATER PANEL
CHANGE
WATER PANEL
CHANGE
MODE
Cool •Off •Heat
ADJUST
Press and Hold
Simultaneously for
Three (3) Seconds
LIGHT

3. Press the LIGHT button several times until “WATER PANEL” is displayed
on the thermostat.
4. Use the
 or  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.
5. Press the LIGHT button repeatedly, after the humidifier type value has
been set, until “DONE” is displayed.
TO CHANGE THE AIR FILTER INDICATOR SETTING
The Aprilaire Thermostat is capable of indicating when the air filter should
be changed.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed.
3. Press the LIGHT button several times until “CHANGE FILTER” is displayed
on the thermostat.
4. Use the
 and  buttons to select between 1, 3, 6, 12 or OFF
(See TABLE 1). This is the number of months until the “CHANGE FILTER”
reminder will be displayed.
5. Press the LIGHT button repeatedly until “DONE” is displayed.
13
MODE
Cool •Off •Heat
ADJUST
Press and Hold
Simultaneously for
Three (3) Seconds
LIGHT
LIGHT
ADJUST
WATER PANEL WATER PANEL

TO SET NUMBER OF WEEKEND EVENTS
(MODELS 8363, 8365 AND 8366 ONLY)
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 your 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.
1. Place the MODE switch in the OFF mode.
2. Push and hold both of the temperature ADJUST buttons simultaneously
(
 and  ) until “ROOM” and “OFF” are no longer displayed.
3. Press the LIGHT button several times until “WAKE, LEAVE, RETURN,
SLEEP” is displayed on the thermostat.
4. Press the
 or  buttons to toggle between the two selections.
5. Press the LIGHT button when done. “DONE” will appear on the display
and the thermostat will reset.
14
LIGHT
ADJUST
CHANGE FILTER CHANGE FILTER
TABLE 1
FILTER TYPE CHANGE FREQUENCY THERMOSTAT SETTING
Disable the feature OFF
Disposable Panel 1 month 1
Washable Electrostatic 3 months 3
Extended Media (Aprilaire) 6-12 months 6 or 12
LIGHT
ADJUST
SA SU
SLEEP
WAKE
RETURN
SLEEP
LEAVE
WAKE
SA SU

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 CORPORATION FOR ANY LABOR
COSTS AND SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BY
YOUR INSTALLER AS CONTRASTED TO DEFECTS IN THE THERMOSTAT ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR 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 AFORESAID
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 my also have other rights which
vary from state to state.
15
LIMITED WARRANTY
P.O. BOX 1467 • MADISON, WI 53701-1467
Products For Better Indoor Air Quality™MADE IN USA
Form No. 5173 09.04
B2202814A © 2004 Research Products Corporation