Service Manual

5
The successful development of hermetically sealed refrigera-
tion compressors has complet ely sealed t he compressor's
moving parts and electric mot or inside a common housing,
minimizing refrigerant leaks and the hazards sometimes asso-
ciated with moving belts, pulleys or couplings.
Fundament al to the design of hermetic compressors is a
met hod whereby electrical current is transmitted to t he com-
pressor motor through terminal conductors which pass
through the compressor housing wall. These t erminals are
sealed in a dielect ric mat erial w hich insulates t hem from the
housing and maint ains the pressure tight int egrity of the her-
met ic compressor. The terminals and t heir dielectric embed-
ment are strongly const ructed, but are vulnerable to careless
compressor inst allation or maint enance procedures and equally
vulnerable to internal electrical short circuits caused by exces-
sive syst em contaminants.
SAFE REFRIGERANT HANDLING
While these items will not cover every conceivable situat ion, they should serve as a useful guide.
In either of these inst ances, an elect rical short between the ter-
minal and the compressor housing may result in the loss of
integrity between t he t erminal and its dielectric embedment .
This loss may cause t he t erminals to be expelled, thereby vent -
ing t he vaporous and liquid cont ents of the compressor hous-
ing and syst em.
A vent ing compressor terminal normally presents no danger
to anyone, providing the terminal protective cover is properly
in place.
If, however, the terminal protective cover is not properly in
place, a venting terminal may discharge a combination of
(a) hot lubricating oil and refrigerant
(b) flammable mixt ure (if syst em is cont aminated
wit h air)
in a stream of spray which may be dangerous to anyone in the
vicinity. Deat h or serious bodily injury could occur.
Under no circumst ances is a hermet ic compressor to be elec-
trically energized and/ or operat ed without having the termi-
nal protect ive cover properly in place.
See Service Section S-17 for proper servicing.
IM PORTANT INFORM ATION
WARNING
REFRIGERANTS ARE HEAVIER THAN AIR. THEY CAN "PUSH OUT" THE
OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSED SPACE.
T
O AVOID
POSSIBLE DIFFICULTY IN BREATHING OR DEATH:
•
N
EVER PURGE REFRIGERANT INTO AN ENCLOSED ROOM OR SPACE.
B
Y
LAW, ALL REFRIGERANTS MUST BE RECLAIMED.
•IF AN INDOOR LEAK IS SUSPECTED, THOROUGHLY VENTILATE THE AREA
BEFORE BEGINNING WORK.
•
L
IQUID REFRIGERANT CAN BE VERY COLD.
T
O AVOID POSSIBLE FROST-
BITE OR BLINDNESS, AVOID CONTACT WITH REFRIGERANT AND WEAR
GLOVES AND GOGGLES.
I
F LIQUID REFRIGERANT DOES CONTACT YOUR
SKIN OR EYES, SEEK MEDICAL HELP IMMEDIATELY.
•
A
LWAYS FOLLOW
EPA
REGULATIONS.
N
EVER BURN REFRIGERANT,
AS POISONOUS GAS WILL BE PRODUCED.
WARNING
SYSTEM CONTAMINANTS, IMPROPER SERVICE PROCEDURE AND/OR PHYSICAL
ABUSE AFFECTING HERMETIC COMPRESSOR ELECTRICAL TERMINALS MAY
CAUSE DANGEROUS SYSTEM VENTING.
WARNING
T
O AVOID POSSIBLE INJURY, EXPLOSION OR DEATH, PRACTICE SAFE
HANDLING OF REFRIGERANTS.
WARNING
TO AVOID POSSIBLE EXPLOSION, USE ONLY RETURNABLE (NOT DISPOSABLE)
SERVICE CYLINDERS WHEN REMOVING REFRIGERANT FROM A SYSTEM.
• ENSURE THE CYLINDER IS FREE OF DAMAGE WHICH COULD LEAD TO A
LEAK OR EXPLOSION.
• ENSURE THE HYDROSTATIC TEST DATE DOES NOT EXCEED 5 YEARS.
• ENSURE THE PRESSURE RATING MEETS OR EXCEEDS 400 LBS.
WHEN IN DOUBT, DO NOT USE CYLINDER.
WARNING
TO AVOID POSSIBLE EXPLOSION:
•
N
EVER APPLY FLAME OR STEAM TO A REFRIGERANT CYLINDER.
I
F YOU
MUST HEAT A CYLINDER FOR FASTER CHARGING, PARTIALLY IMMERSE
IT IN WARM WATER.
• NEVER FILL A CYLINDER MORE THAN 80% FULL OF LIQUID REFRIGERANT.
• NEVER ADD ANYTHING OTHER THAN R-22 TO AN R-22 CYLINDER OR
R-410A TO AN R-410A CYLINDER. THE SERVICE EQUIPMENT USED MUST
BE LISTED OR CERTIFIED FOR THE TYPE OF REFRIGERANT USED.
•
S
TORE CYLINDERS IN A COOL, DRY PLACE.
N
EVER USE A CYLINDER
AS A PLATFORM OR A ROLLER.