Carrier 58MEC Service And Maintenance Instructions page 4

FURNACE CASING WIDTH
IN (MM)
17--- 1/2 (445)
21 (533 )
24--- 1/2 (610)
FILTER CABINET HEIGHT --- IN (MM)
16 (406)
20 (508)
24 (610)
* Filters with a side return- -air may have a different filter size. Measure the filter to
obtain the correct size.
{ Factory- -provided with furnace.
Fig. 3 - - Bottom Filter Arrangement
3. Disconnect blower motor wires from furnace control. Field
thermostat connections may need to be disconnected de-
pending on their length and routing.
4. Remove control box mounting screws and position control
box, transformer, and door switch assembly to right side of
furnace casing.
5. If condensate trap is located in left- - or right- -hand side of
furnace casing, proceed to item 6, otherwise remove trap
and tubing as described below (See Fig. 5):
a. Disconnect field drain connection from condensate trap.
b. Disconnect drain and relief port tubes from condensate
trap.
c. Remove condensate trap from blower shelf.
6. Remove screws securing blower assembly to blower shelf
and slide blower assembly out of furnace. Detach ground
wire and disconnect blower motor harness plugs from
blower motor.
Table 1 – Furnace Air Filter Table
FILTER QUANTITY AND SIZE *
SIDE RETURN
{*
IN (MM)
(1) 16 x 25 x 3/4 {
(406 x 635 x 19) {
(1) 16 x 25 x 3/4
(406 x 635 x 19)
(1) 16 x 25 x 3/4
(406 x 635 x 19)
Table 2 – Air Filter Located in Filter Cabinet
FILTER SIZE --- IN (MM)
(1) 16 x 25 x 3/4*
(406 x 635 x 19) or
(1) 16 x 25 x 4--- 5/16
(406 x 635 x 110)
(1) 20 x 25 x 3/4*
(508 x 635 x 19) or
(1) 20 x 25 x 4--- 5/16
(508 x 635 x 110)
(1) 24 x 25 x 3/4*or
(610 x 635 x 19) or
(1) 24 x 25 x 4--- 5/16
(610 x 635 x 110)
WASHABLE
FILTER
FILTER
SUPPORT
FILTER
RETAINER
WASHABLE FILTER OR
DISPOSABLE MEDIA FILTER
IN FILTER CABINET
A00232
BOTTOM RETURN*
IN (MM)
(1) 16 x 25 x 3/4
(406 x 635 x 19)
(1) 20 x 25 x 3/4 {
(508 x 635 x 19) {
(1) 24 x 25 x 3/4 {
(610 x 635 x 19) {
NOTE: Blower wheel is fragile. Use care.
7. Clean blower wheel and motor by using a vacuum with soft
brush attachment. Be careful not to disturb balance weights
(clips) on blower wheel vanes. Do not bend wheel or blades
as balance will be affected.
8. If greasy residue is present on blower wheel, remove wheel
from the blower housing and wash it with an appropriate
degreaser. To remove wheel:
a. Mark blower wheel location on shaft before disassembly
to ensure proper reassembly.
b. Loosen setscrew holding blower wheel on motor shaft.
NOTE: Mark blower mounting arms and blower housing so each
arm is positioned at the same hole location during reassembly.
c. Mark blower wheel orientation and cutoff plate location
to ensure proper reassembly.
d. Remove screws securing cutoff plate and remove cutoff
plate from housing.
e. Remove bolts holding motor mounts to blower housing
and slide motor and mounts out of housing. Disconnect
capacitor and ground wire attached to blower housing
before removing motor. Motor mounts do not need to
be removed from motor.
f. Remove blower wheel from housing.
WASHABLE
FILTER
IN FURNACE
WASHABLE FILTER OR
DISPOSABLE MEDIA
FILTER IN FILTER CABINET
Fig. 4 - - Filter Installed for Side Inlet
4
FILTER TYPE
IN (MM)*
3/4 (19 mm) thick washable
3/4 (19 mm) thick washable
3/4 (19 mm) thick washable
FILTER TYPE
Washable
Washable
Washable
FILTER
RETAINER
A00233