Johnson Controls 820900-UUM-A-1011 Manuel D’Utilisation

820900-UUM-A-1011

Johnson Controls Unitary Products

3

To comfortably cool your home, your heat pump must
remove both heat and humidity. Don’t turn your system
off even though you will be away all day. On a hot day,
your system may have to operate between 8 and 12
hours to reduce the temperature in your home to a nor-
mal comfort level.

Keep windows closed after sundown. While the out-
door temperature at night may be lower than indoors,
the air is generally loaded with moisture which is
soaked up by furniture, carpets and fabrics. This mois-
ture must be removed when you restart your system.

The hotter the outside temperature, the greater the
load on your system. Therefore do not be alarmed
when your system continues to run after the sun has
set on a hot day. Heat is stored in your outside walls
during the day and will continue to flow into your home
for several hours after sunset.

Use your kitchen exhaust fan when cooking. One sur-
face burner on “High” requires one ton of cooling. Turn
on your bathroom exhaust fan while showering to
remove humidity. You can also help your system in the
summer by closing drapes or blinds and lowering
awnings on windows that get direct sunlight.

In order to insure long and trouble free service from
your system, we recommend periodic inspection,
cleaning, lubrication and adjustment by your installing
Dealer/Contractor. Be sure to ask about this service.

For those buildings with in-house maintenance, please
follow the instructions listed below to care for your sys-
tem.

Both the indoor blower motor and outdoor fan motor
are permanently lubricated and require no mainte-
nance.

Filters must always be used and must be kept clean.
When filters become dirt laden, insufficient air will be

delivered by the blower, decreasing your units effi-
ciency and increasing operating costs and wear-and-
tear on the unit and controls.

3 THRU 6 TON
Units 3-6 Ton are shipped with 1" throwaway type air filters.
The filter racks on 3-6 ton units will receive 1" or 2" filters. Fil-
ters can also be installed in the building at a suitable return
air location if an economizer or outside air accessory is not
used. Filters must always be used. They should be inspected
once a month and thoroughly cleaned or replaced if it
appears they are beginning to accumulate excessive dirt. Fil-
ter sizes and quantities are shown in the following table.

To install the filters, remove the filter access panel located to
the left of the condensate drain connection as shown in Fig-
ure 1.

NOTE:  Filters must be installed with “Air Flow” arrows point-

ing inward -- toward the indoor coil. In the event the 
spacers in the filter section are removed, they must 
be reinstalled in their original position.

Slide filters all the way into the filter racks provided. When 
more than one filter in a filter rack is required, they must butt 
each other when sliding into position. Replace the filter 
access panel. 

Prior to any of the following maintenance pro-
cedures, shut off all power to the unit.