Advertisement
50NL: Owner's Information Manual
Maintenance and Service
This section discusses maintenance that should be performed on your
system. Most maintenance should be performed by your dealer. You, as
the owner, may wish to handle some minor maintenance for your new
unit.
Routine Maintenance
All routine maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard procedure.
To assure proper functioning of the unit, flow of condenser air must not
be obstructed from reaching the unit. Clearance from the top of the unit
is 48 in. (1219 mm). Clearance of at least 36 in.(914 mm) is required on
sides except the power entry side (42 in. [1067 mm] clearance) and the
duct side (12 in. [305 mm] minimum clearance).
Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CUT HAZARD
Failure to follow this warning could result in personal injury, death or
property damage.
1. TURN OFF ELECTRICAL POWER TO YOUR UNIT BEFORE
SERVICING OR PERFORMING MAINTENANCE.
2. When removing access panels or performing maintenance
functions inside your unit, be aware of sharp sheet metal parts and
screws. Although special care is taken to reduce sharp edges to a
minimum, be extremely careful when handling parts or reaching
into the unit. Wear safety glasses, glove, and appropriate
protective clothing.
Air Filters
The air filter(s) should be checked every 3 or 4 weeks and changed or
cleaned whenever it becomes dirty. Dirty filters produce excessive stress
on the blower motor and can cause the motor to overheat and shut down.
This unit must have air filters in place before it can be operated. These
filters can be located in one of at least two places. In many applications,
the installer will provide return air filter grilles mounted on the wall or
ceiling of the conditioned structure. In the instance of filter grilles, the
filters can simply be removed from the grille and replaced.
The other typical application is an accessory filter rack installed inside
the unit itself. The following information is given to assist in changing
filters used in these internal filter racks.
Filter kits are available as a purchased accessory or a factory installed
option. The same filter kit is included with the accessory economizers
and factory installed economizers. See
with accessory filter rack.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 1
for filter sizes supplied
Table 1 – Replacement Filter Sizes
Unit Size
24
30
1 each 24 x 18 x 1 (610 x 457 x 25 mm),
36
1 each 24 x 14 x 1 (610 x 356 x 25 mm),
42
1 each 24 x 18 x 1 (610 x 457 x 25 mm),
48
1 each 24 x 18 x 1 (610 x 457 x 25 mm),
*
60
*. Units with bent indoor coil.
To replace or inspect filters in accessory filter rack (See
1. Remove the filter access panel using a 5/16-in. nut driver.
2. Remove the filter(s) by pulling it out of the unit. If the filter(s) is
dirty, clean or replace with a new one.
When installing the new filter(s), note the direction of the airflow arrows
on the filter frame, which should be pointed at the indoor coil.
3. Reinstall filter access panel ensuring opening is air and water tight.
If you have difficulty locating your air filter(s) or have questions
concerning proper filter maintenance, contact your dealer for
instructions. When replacing filters, always use the same size and type of
filter that was supplied originally by the installer.
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in property damage.
Never operate your unit without filters in place. An accumulation of
dust and lint on internal parts of your unit can cause loss of efficiency
and blower motor and/or compressor damage.
Fig. 2 – Unit Access Panel
3
Filter Size
2 each 20 x 12 x 1
(508 x 305 x 25 mm)
2 each 20 x 12 x 1
(508 x 305 x 25 mm)
24 x 16 x 1 (610 x 406 x 25 mm)
24 x 16 x 1 (610 x 406 x 25 mm)
24 x 16 x 1 (610 x 406 x 25 mm)
24 x 16 x 1 (610 x 406 x 25 mm)
Fig.
CAUTION
2):
A14456
Advertisement
