Heat Controller Patriot 80 Series Owner's Manual | Page 3

Heat Controller Air Conditioners Owner's Manual - Patriot 80 Series.
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Upflow Units
To replace the filter in an upflow unit, refer to the following
directions and Figure 2.

Side Return
To replace the filter in a furnace with an external filter rack
or cabinet on either side of the furnace cabinet:
1. Turn off the power to unit.
2. The filter(s) may be removed by sliding toward the front.

Replace in a reverse procedure.

Bottom Return
To replace the filter in a furnace with a bottom return air:
1. Turn off the power to unit.
2. Remove lower front panel by lifting up and pulling out.
3. The filter(s) may be removed by sliding toward the front.

Replace in a reverse procedure.

airflow.  This can cause heat exchanger failure or cooling
coil freeze-up along with the accompanying costly service
calls.

The dealer may have changed the filter size, so the
information provided in Table 1 may not apply to your
installation.
Always measure the original filter and replace with the
same size and type.

Basement Units
To replace the filter in a basement unit (see Figure 3):

1. Turn off power to unit.
2. Remove lower rear panel by lifting up and pulling out.
3. The filter(s) may be removed by sliding out through the

rear of the furnace. To reinsert, place filter on the two
filter supports and slide into unit.

Restore power to the furnace after the door or panel has
been replaced and check furnace for proper operation.  If
the unit does not operate, call your dealer for service.

Lubrication
Lubrication of the bearings in the circulating air blower motor
and the combustion blower motor is not recommended.

Combustion and Ventilation Air
Adequate air must reach your furnace to provide for proper
and safe operation. 

Any obstruction of this airflow can

cause an unsafe condition which may result in death or
permanent injury. Lethal carbon monoxide gas can be
produced if combustion air is restricted.
Furnaces located in a closet, alcove, or utility room must
have provision for adequate air supply by means of upper
and lower grilles in the door, or by the introduction of outside
air, or both. National codes and local code requirements are
generally alike. However, local codes take precedence.

Venting and Furnace Support
Venting of this furnace must comply with our published
instructions. If the installer has not followed these
requirements, you should request the installer to comply as
soon as possible.

Make sure all flue product materials external to the furnace
are clear and free of any obstruction, slope upward, and
have no holes or leaks.
It is important that the outside area where the vent terminates
is kept clear of any obstructions which might block or impede
the venting of the furnace.

Should any unusual conditions be observed during your
inspections, call your authorized service dealer at once.

Return Air
Check that all return air duct connections are tight and sealed
to the furnace cabinet and that all return air grilles or registers
are located outside the space containing the furnace.

Table 1

s

l

e

d

o

M

e

z

i

S

F

U

O

"

5

2

x

"

6

1

)

5

9

/

4

8

,

2

7

/

7

5

(

R

L

O

,

F

L

O

"

9

1

x

"

8

1

)

5

2

1

/

2

1

1

(

R

L

O

,

F

L

O

"

1

2

x

"

9

1

)

8

6

1

/

0

4

1

(

R

L

O

"

6

1

/

7

-

2

2

x

"

8

/

1

-

0

2

)

6

9

1

/

8

6

1

(

R

L

O

"

8

/

3

-

4

2

x

"

8

/

5

-

4

2

Factory-Supplied Filters

Models ODF and ODR are not equipped with factory-supplied filters.
The filters for these units are supplied in the field.

Filter

Rear

Of

Furnace

Filter

Supports

Basement Units: Filter Replacement

Figure 3

Side Return

Bottom Return

R/A

Duct

Filter Rack

Filter
(slides in from front of unit)

Filter

Base

Side

Panel

Front

Panel

Upflow Units: Filter Replacement

Figure 2

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