Replacing Or Cleaning Filters; Upflow Filters (Guc, Gux, And Gud); Side Air Return - Amana GUC Series User's Informational Manual

III. Maintenance
AT LEAST ONCE A YEAR, BEFORE THE HEATING SEA-
SON BEGINS, have the furnace checked by a qualified ser-
vicer to be certain there is adequate combustion air and that
the furnace and the vent system are working properly.
Have the vent pipe and combustion air pipe (some models)
checked for blockage by debris or leaks, which could permit
fumes to enter the house. Replace any damaged sections of
the vent pipe.
WARNING
To avoid death or personal injury due to elec-
trical shock, disconnect the electrical power
before performing any maintenance.

Replacing or Cleaning Filters

WARNING
To avoid death, personal injury or property
damage, never operate furnace without a fil-
ter installed. Dust and lint will build up on
internal parts resulting in loss of efficiency,
equipment damage and possible fire.
If filter replacement becomes necessary, it must be replaced
with a filter of the same type and size that complies with
UL900 or CAN/ULC-S111 standards.
See the Specification Sheet for filter sizes.
WARNING
To avoid death or personal injury due to elec-
trical shock, disconnect the electrical power
before removing filters or performing any
maintenance.
The filter is designed for high velocity heating and cooling
applications. Filters must be inspected, cleaned or changed
every two months or as required. It is the owner's responsi-
bility to keep air filters clean. NOTE: Dirty filters are the
most common cause of inadequate heating or cooling per-
formance.

Upflow Filters (GUC, GUX, and GUD)

To remove the filter contained in the furnace retaining rails,
disconnect electrical power to the furnace and remove the
lower door by turning the door latches 1/4 turn.
Grasp the lower portion of the filter, lift up to disengage it
from the lower railing, move towards blower, drop filter down.
Pull filter outward. (Figure 12)

Side Air Return

1. Lift filter above bottom
rail.
Front of Furnace
Blower
Grab Here
And Lift
3. Lower filter below top
rail.
Front of Furnace
Blower
Filter Removal
GUC, GUX, and GUD
Side Return Filter Sizes
Minimum Recom m ended Size, Inches
Size_Air Flow
045_30
070_30
070_40
090_35
090_50
115_50
* Quantity - Inches (Total Minimum Surface Area in Square Inches)
Permanent filter sizes are as shipped with furnace. The minimum
permanent filter size area is based on allowable face velocity of 620 feet
per minute.
9
2. Tilt filter to clear rail.
Front of Furnace
Blower
4. Pull filter out.
Front of Furnace
Blower
Figure 12
Disposable* Permanent*
1 - 24x24 (576) 1 - 16x25 (280)
1 - 24x24 (576) 1 - 16x25 (280)
2 - 16x25 (768) 1 - 16x25 (372)
2 - 14x25 (692) 1 - 16x25 (342)
2 - 20x25 (960) 2 - 16x25 (465)
2 - 20x25 (960) 2 - 16x25 (465)
Table 2