Table 7--Accessory Electric Heat Pressure Drop
0n. wg)
I CFM
"E"E°"wI800I80011000112001140011600118001200012200
5-20 0.06 0.08 0.10 0.13 0.15 0.18 0.20 0.23 0.25
or air filter(s). If the drain tube is restricted, clear it with a
"plumbers snake" or similar probe device. Ensure that the
auxiliary drain port above the drain tube is also clear.
Step 5--Outdoor Fan
Keep the Outdoor fan l?'ee l?'om all obstructions to ensure
proper cooling operation. Never place articles on top of the
unit. Damage to unit may result.
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. Loosen fan hub setscrews.
4. Adjust fan height as shown in Fig. 23 or 24.
5. Tighten setscrews.
6. Replace outdoor-fan assembly.
Step 6--Electrical Controls and Wiring
Inspect and check the electrical controls and wiring annually. Be
slu'e to tmw q_' rite electrical power to rite Httit and in.stall lockout
tag.
Remove the top panel to locate all the electrical controls and
wiring. Check all electrical connections lk_r tightness. Tighten all
screw connections. If any smoky or burned connections are
noticed, disassemble the connectiom clean all the parts, restrip the
wire end and reassemble the connection properly and securely.
I .......
3.125 in.
C00021
Fig. 23--Outdoor-Fan Adjustment (030-048 Size)
,....._flP _.., II I/ }
C02017
Fig. 24--Outdoor-Fan Adjustment (060 Size)
Check to ensure no wires are touching refrigerant tubing or sharp
sheet metal edges. Move and secure wires to isolate l_'om tubing
and sheet metal edges.
Al_er 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 malluuction has occurred, check
each electrical component with the proper electrical instrumenta-
tion. Reli:r to the unit wiring label when making these checkouts.
NOTE: Reli3r to the Sequence of Operation section, as an aid in
determining proper control operation.
Step 7iRefrigerant Circuit
Inspect all rel}igerant tubing connections and the unit base liar oil
accunmlations annually. Detecting oil generally indicates a rel?'ig-
erant leak.
If oil is detected or if low cooling perIkmnance is suspected,
leak-test all refrigerant tubing using an electronic leak-detector, or
liquid-soap solution. If a rel_'igerant leak is detected, relcr to Check
Ii)r Refl'igerant Leaks section. (See Table of Contents Ii)r page
number.)
If no refl'igeraut leaks are R)und and low cooling perlbrmance is
suspected, reli:r to Rel?'igerant Charge. (See Table of Contents li)r
page number.)
Step 8--Indoor Airflow
The cooling airflow does not require checking unless improper
perlk>rmance is suspected. /[ a problem eri,_t,_, be .s;uv, that all
.s'ltl)plx'- attd retur;l-air grilles are open and f}'(,e._}'om obstri¢ctions,
attd that the air.filter is clean. When necessary, relier to Indoor
Airflow and Airflow A_[justmeuts section to check the system
airflow.
Step 9--Metering Devices
Rel?'igerant metering devices are fixed orilices and are located in
the inlet header to the indoor and outdoor coils.
Check valves are also located in the liquid lines near the strainers.
The check valves are the smaller of the two components.
Step 10--Lubrication
L'OMPRESSOR The compressor is charged with the correct
amount of oil at the factory.
FAN MOTOR BEARINGS Fan motor bearings are perma-
nently lubricated. No lurtber lubrication of outdoor or indoor fan
motors is required.
Step 11--Liquid Line Strainer
The liquid line strainer (to protect metering device) is made of wire
mesh and is located in the liquid line on the inlet side of the
metering device.
Check valves are also located in the liquid lines near the strainers.
The Strainers are the larger of the two components.
Step 12--High Flow Valves
Located on the cou_pressor hot gas and suction tubes are High
Flow Valves. Large black plastic caps distinguish these valves
with ()-rings located inside the caps. These valves cannot be
accessed lk)r service in the field. Ensure the plastic caps are in
place and tight or the possibility of reI_'igerant leakage could occur.
19
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