Carrier 50ET - Manual (Page 11)

HEATINC A COOLING
50ET,QT
Single-Package Units
I. Every 3 years when environment is reasonably clean,
ambient temperature is less than 105 F and unit
operating time averages 8 to 15 hours a day.
c. Every 5 years when environment is clean, ambient
temperature is less than 105 F and unit operating time
averages less than 8 hours a day.
INDOOR MOTOR — To oil indoor motor, remove dust
caps or plugs from oil holes located at each end of the
motor. Use a teaspoon, 5 cc (5 ml), 3/16 oz or 16 to 25
drops of a good grade of SAE 20 nondetergent motor oil
in each oil hole. Allow time for total quantity of oil to
be absorbed into each bearing. After oiling motor, be sure
to wipe off excess oil from housing and replace cap or
plugs on oil port.
Outdoor Coil Cleaning — To be done at the be­
ginning of each cooling season or more often if required.
A CAUTION
Fin damage or removal can result in higher operating
costs or compressor damage. Do not use flame, high-
pressure water, steam, or volatile or corrosive
cleaners on fins and tubing. Follow these instruc­
tions carefully. Contact your dealer if you encounter
problems.
1. Shut off power to unit.
2. Remove chassis from sleeve by removing 6 bolts and
sliding chassis out. Transport chassis to an appro­
priate cleaning location.
3. Clean coil using vacuum cleaner and its crevice tool
(see Fig. 17). Work crevice tool perpendicularly to
coil tubes, making sure tool only touches dirt on fins.
To prevent fin removal, do not “scrub” fins with tool
or move tool parallel to coil tube configuration.
4. If oil deposits are present, spray coil with liquid house­
hold detergent. Wait 10 minutes, then proceed to
step 5.
5. Using garden hose, spray coil perpendicularly to coil
tubes with a constant stream of water at moderate
pressure (see Fig. 18). Keep nozzle at a 15 to 20 degree
angle, about 3 in. from coil face and 18 in. from tube.
Spray so debris is washed out and away from coil
making sure water does not contact components
on side of chassis.
6. Make sure condensate pan drain is not clogged with
debris.
7. Reinstall ehassis in sleeve.
8. Restore power to unit.
Fig. 18 — Positioning Hose to Spray Coil
Indoor Coil and Condensate Pan Cleaning —
Clean and inspect indoor coil, condensate pan and drain
at .same time outdoor coil is cleaned.
1. Use vacuum cleaner nozzle to clean the face of coil.
2. Clean condensate pan with a brush similar to that
shown.
3. Hold pail under condensate pan drain connection and
flush pan by slowly pouring water on coil. Do not
overflow pan.
Indoor Air Filter Replacement (Refer to Fig. 3.)
— Replace filters at least 4 times per year especially at the
beginning of the heating and cooling seasons.
On 50ET,QT212,215 and 218, slide filter through slots
at bottom of left and right coil partitions. Slide filter
upward until top of filter reaches top of filter brackets.
Then, rest bottom of filter on bottom flanges of left and
right coil partitions.
On 50ET,QT224 and 230, slide filter upward until top
of filter reaches top of filter brackets. Then, rest bottom
of filter on horizontal sheet metal shelf between left and
right coil partitions making sure tabs at bottom of filter
brackets hold filter in place.
Outdoor Fan Adjustment — Required fan position
is shown in Fig. 19. Adjust position by loosening setscrew
on fan hub and moving in or out of orifice.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book II 11 14 14 PC131 Catalog No 535-078 Printed in U S A. Form 50ET.QT-3SI Pgll 5-85 Replaces: 50QT-10SI
>1h iBal 1a IfSa For replacement Hems use Carrier Specified Parts