035-19699-001-B-0804
6
Unitary Products Group
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.
ECONOMIZER
Even with good filters properly in place, the economizer
assembly will become dust laden after many months of
use. The entire assembly should be inspected annu-
ally. If the assembly is heavily coated with dust, it can
be brushed and cleaned with a vacuum. A common
aerosol contact cleaner will help remove excess accu-
mulation.
After the dust and debris is removed, a silicon based
spray lubricant should be applied to each of the gears
used to connect and ensure proper alignment of the
damper blades.
BLOWER ASSEMBLY
Even with good filters properly in place, blower wheels
and motors will become dust laden after many months
of operation. The entire blower assembly should be
inspected annually. If the motor and wheel are heavily
coated with dust, they can be brushed and cleaned
with a vacuum cleaner.
BLOWER SHAFT BEARING
Blower shaft bearings should be inspected on a
monthly basis. At a minimum, the bearings should be
relubricated every 6 months using a lithium-based
grease (NLGI grade 2) recommended for ball bearing
service.
MOTORS
Outdoor fan motors are permanently lubricated and
require no maintenance.
Ventor motor is factory lubricated for an estimated 10
year life.
Indoor Blower Motor and Drive - The indoor blower
motor features ball bearings that do not require peri-
odic lubrication. Periodic lubrication of the motor and
bearings can extend the life of components but is
optional.
If desired, every three years, using a low pressure
grease gun, pump grease into the bearing grease fit-
ting until grease just begins to show at the seals. Do
not over lubricate. Use any lithium base grease recom-
mended for ball bearing service.
FIGURE 5 - END VIEW LESS FILTER ACCESS
PANEL
Perform all maintenance operations on the
damper assembly with power discon-
nected. Do not clean or lubricate with the
unit in operation.
15, 17.5, 20, 25 TON ULTRA-HIGH EFFICIENCY UNITS
25 TON STANDARD EFFICIENCY
15 TON
(2) 18" X 24"
FILTERS
20 TON
15,20,25 TON REHEAT
20 TON
15,20,25 TON REHEAT
(4) 16" X 20"
FILTERS
(4) 16" X 25"
FILTERS
(3) 18" X 24"
FILTERS
15 TON
(6) 12" X 24"
FILTERS
(6) 12" X 24"
FILTERS
15, 20, 25 TON REHEAT UNITS
15 & 20 TON STANDARD & HIGH EFFICIENCY UNITS
INDOOR COIL
CONDENSATE
DRAIN
CONNECTION
CONDENSATE
DRAIN
CONNECTION
INDOOR COIL
Excessive lubrication may accelerate the
accumulation of dust.
Perform all maintenance operations on the
blower motor with electric power discon-
nected from the unit. Do not attempt to lubri-
cate bearings with the unit in operation.
Damage can occur if the bearings are overlu-
bricated. Use grease sparingly.