Table 6 - Filter Pressure Drop (IN. W.C.)
CFM
900 1000 1100 1200 1300 1400 1500
0.09 0.09 0.09 0.10 0.11 0.12 0.14
FILTER
UNIT SIZE SIZE in.
(mm) 500 600 700 800 1600 1700 1800 1900 2000 2100 2200
24 x 24
024-036 0.06 0.07 0.08 0.08 0.15 ......
(610x 610)
30 x 30
042-060 ........ 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17
(762 x 762)
Table 7 - Accessory Electric Heat Pressure Drop (IN. W.C.)
CFM
HEATER kW
600 1000 1200 1400 1600 1600 2000 2200
5-20 0.033 0.037 0.042 0.047 0.052 0.060 0.067 0.075
Outdoor Coil Indoor Coil and Condensate Drain Pan
Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year.
The coils are easily cleaned when dry; therefore, inspect and clean
the coils either before or after each cooling season. Remove all
obstructions, including weeds and shrubs, that interfere with the
airflow through the condenser coil.
Straighten bent fins with a fin comb. If coated with dirt or lint,
clean the coils with a vacuum cleaner, using the soft brush
attachment. Be careful not to bend the fins. If coated with oil or
grease, clean the coils with a mild detergent and water solution.
Rinse coils with clear water, using a garden hose. Be careful not to
splash water on motors, insulation, wiring, or air filter(s). For best
results, spray condenser coil fins from inside to outside the unit. On
units with an outer and inner condenser coil, be sure to clean
between the coils. Be sure to flush all dirt and debris from the unit
base.
Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation, motor, wiring, or
air filter(s). If the drain trough is restricted, clear it with a
"plumbers snake" or similar probe device.
Outdoor Fan Adjustment
[]NIT OPERATION HAZARD
Failure to follow this caution may result in damage to unit
components.
Keep the condenser fan free from all obstructions to ensure
proper cooling operation. Never place articles on top of
unit.
1. Shut off unit power supply and install lockout tag.
2. Remove outdoor-fan assembly (grille, motor, motor cover,
and fan) by removing screws and flipping assembly onto
unit top cover.
3. Inspect the fan blades for cracks or bends.
4. If fan needs to be removed, loosen the setscrew and slide the
fan off the motor shaft.
5. When replacing fan blade, position blade as shown in Fig.
15. Tighten setscrews.
_A
MOTOR
SHAFT
&_UN!T S!ZE A (i_
024 13/16
030 13/16
036 0
042 0
048 0
060 3/16
A10020
Fig. 15 - Outdoor Fan Adjustment
Electrical Controls and Wiring
Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit.
Remove access panel to locate all the electrical controls and wiring.
Check all electrical connections for tightness. Tighten all screw
connections. If any smoky or burned connections are noticed,
disassemble the connection, clean all the parts, re-strip the wire
end and reassemble the connection properly and securely.
Check to ensure no wires are touching refrigerant tubing or sharp
sheet metal edges. Move and secure wires to isolate from tubing
and sheet metal edges.
After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malfunction has occurred, check
each electrical component with the proper electrical
instrumentation. Refer to the unit wiring label when making these
checks. (See Fig. 13)
16
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