39
MAINTENANCE
Prior to any maintenance or service to the unit, shut off,
lockout, and tagout the electrical disconnect and fuel valve (if
applicable) that supplies the unit in accordance with OSHA
regulations and, if the unit includes electric or gas heat, allow
ample time for the unit to cool. After maintenance is performed
or the unit is serviced, the unit shall be re-commissioned per
the start-up procedure.
Installation Code and Quarterly Inspec-
tions —
All installation and service of Carrier’s 62X equip-
ment must be performed by a contractor qualified in the instal-
lation and service of equipment sold and supplied by Carrier, as
well as conform to all requirements set forth in the manuals and
all applicable governmental authorities pertaining to the instal-
lation, service, operation, and labeling of the equipment.
To help facilitate optimum performance and safety, Carrier
recommends that a qualified contractor conducts, at a mini-
mum, quarterly inspections of your 62X Series equipment and
perform service where necessary, using only replacements
parts sold and supplied by Carrier.
General
QUARTERLY — Follow the entire start-up procedure at this
time and check settings (controls, operating temperatures, op-
erating pressures, power, and control voltages) and operation.
Unit Exterior
CABINET EXTERIOR — After installation, fix scratches.
Periodic painting should be done thereafter, as required. The
caulk should be inspected annually. Re-apply caulk as needed
to maintain integrity.
UNIT LOCATION — Verify that no flammable objects, liq-
uids, or vapors are present near the unit. If unit includes gas
heat, clearances to combustibles around the vent must be ad-
hered to (see Clearances, page 2). Do not hang anything from
or place anything on the unit. Keep the area around the unit free
of all objects.
Direct Drive Supply and Exhaust Fans
BLOWER WHEEL — Inspect blower wheel and clean as
necessary. A small build-up of dust can cause a significant de-
crease in blower performance. Check for excessive vibration.
Clean and repair as required.
MOTORS
Inspection
Inspect motor every 3 months. Keep the motor clean and
vent openings clear.
Lubrication
1. Motors with grease fittings must be lubricated based on
Table 11.
Table 11 — Motor Lubrication Intervals
NOTE:
These intervals are based on severe duty. Over lubricating
bearings
could result in reduced motor life.
2. A high grade ball or roller bearing grease must be used.
Recommended grease for standard service is Mobil Poly-
rex
1
EM. Other compatible greases include ChevronTex-
aco Polystar
2
, ChevronTexaco Rykon
2
Premium 2, Penn-
zoil
3
Pen 2 Lube, and ChevronTexaco SRI.
3. Motors without grease fittings are sealed for life and do
not require re-lubrication.
Lubricating Instructions
Before greasing, be sure fittings are clean and free from dirt.
Remove grease relief plug or plate and, using a low-pressure
grease gun, pump in the required grease. Do not over-grease.
Re-lubrication intervals are specified in Table 11. After re-lu-
bricating, allow motor to run for 10 minutes before replacing
relief hardware.
Condensing Fans —
Manually rotate to ensure free
movement. Check that all fan mounting hardware is tight.
Check motor bearings for wear.
Refrigeration Circuit Components
EVAPORATOR COIL — Check for dirt and bent fins. Clean
with water from blower side towards filter side.
CONDENSER COIL — Check for dirt and bent fins. Clean
by brushing off with broom.
COMPRESSORS — Compressors are factory-supplied with
a charge of oil and should not require additional maintenance.
Condensate Drain Pan and Drain
Check for blockages. Clean as necessary with a mixture of
1
/
2
cup (0.1 L) bleach and 1 gallon (1.9 L) of warm water, if
signs of mold or algae are present.
Dampers
DAMPERS — Check and clean blades.
DAMPER MOTOR/LINKAGES — Verify that all damper
linkages move freely. Lubricate if necessary.
Energy Conservation Wheel
BEARINGS — Small ECWs (smaller than ECW666) are pro-
vided with no maintenance inboard bearings. These bearings
should require no maintenance during the life of the unit. Larg-
er ECWs come equipped with an external flanged bearing that
should be greased annually. Use a petroleum based lubricant.
DRIVE MOTOR — The drive motors should require no
maintenance. Replace as necessary.
DRIVE BELTS — Belts are multi-link belts with individual
links constructed of a high performance polyurethane elasto-
mer reinforced with multiple plies of polyester fabric. This belt
provides a strong, yet flexible belting. The multi-link feature
provides quick, easy servicing or replacement. Adjust and/or
replace as necessary.
SEALS — Adjust and/or replace as necessary. The seals are
made to clip on the cassette or post metal easily.
WHEEL — The wheel is somewhat self-cleaning through its
normal action of rotating in and out of counter current airflow
streams. In the event that routine quarterly inspection indicates
that there is dirt or dust buildup within the wheel causing an ex-
NEMA FRAME SIZE
(MOTOR HP)
RATED AT 1800 RPM
(HRS)
UP TO 210 (3-5)
6,000
210-280 (7.5-20)
4,750
280-360 (25-30)
3.700
1. Polyrex EM is a trademark of Exxon Mobil corporation.
2. Polystar and Rykon are registered trademarks of Chevron.
3. Penzoil is a registered trademark of Pennzoil Quaker State Company.
IMPORTANT: In general, it is not recommended to mix
greases of different brands. The mixing of different
types of thickeners may destroy the composition and
physical properties of the grease. In the event that a
different grease is required by the end user, the follow-
ing steps can be taken. Using the Lubricating Instruc-
tions, open grease outlet and purge the system as much
as possible of the old or unwanted grease. Repeat this
same operation after one week of service.
