IMPORTANT INFORMATION
3
S
YSTEM
CONTAMINANTS
,
IMPROPER
SERVICE
PROCEDURE
AND
/
OR
PHYSICAL
ABUSE
AFFECTING
HERMETIC
COMPRESSOR
ELECTRICAL
TERMINALS
MAY
CAUSE
DANGEROUS
SYSTEM
VENTING
.
WARNING
Notice:
When the outdoor unit is connected to main power, the inverter
board has a small current flowing into it to be prepared for
operation when needed. Due to this, the PCB components have
to be cooled even when the unit is not running. For this cooling
operation, the condenser fan may come on at any time, includ-
ing in the winter months. Any obstruction to the outdoor fan
should be avoided at all times when the unit is powered to
prevent damage.
The successful development of hermetically sealed refrigeration
compressors has completely sealed the compressor's moving parts
and electric motor inside a common housing, minimizing refriger-
ant leaks and the hazards sometimes associated with moving belts,
pulleys or couplings.
Fundamental to the design of hermetic compressors is a method
whereby electrical current is transmitted to the compressor mo-
tor through terminal conductors which pass through the com-
pressor housing wall. These terminals are sealed in a dielectric
material which insulates them from the housing and maintains
the pressure tight integrity of the hermetic compressor. The termi-
nals and their dielectric embedment are strongly constructed, but
are vulnerable to careless compressor installation or mainte-
nance procedures and equally vulnerable to internal electrical
short circuits caused by excessive system contaminants.
In either of these instances, an electrical short between the termi-
nal and the compressor housing may result in the loss of integrity
between the terminal and its dielectric embedment. This loss may
cause the terminals to be expelled, thereby venting the vaporous
and liquid contents of the compressor housing and system.
A venting 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 mixture (if system is contaminated
with air)
in a stream of spray which may be dangerous to anyone in the
vicinity. Death or serious bodily injury could occur.
Under no circumstances is a hermetic compressor to be electri-
cally energized and/or operated without having the terminal pro-
tective cover properly in place.
See Service Section S-17 for proper servicing.
T
O
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
.
•N
EVER
FILL
A
CYLINDER
MORE
THAN
80%
FULL
OF
LIQUID
REFRIGERANT
.
•N
EVER
ADD
ANYTHING
OTHER
THAN
R-410A
TO
A
RETURNABLE
R-410A
CYLINDER
. T
HE
SERVICE
EQUIPMENT
USED
MUST
BE
LISTED
OR
CERTIFIED
FOR
THE
TYPE
OF
REFRIGERANT
USE
.
•S
TORE
CYLINDERS
IN
A
COOL
,
DRY
PLACE
. N
EVER
USE
A
CYLINDER
AS
A
PLATFORM
OR
A
ROLLER
.
WARNING
T
O
AVOID
POSSIBLE
EXPLOSION
:
•U
SE
ONLY
RETURNABLE
(
NOT
DISPOSABLE
)
SERVICE
CYLINDERS
WHEN
REMOVING
REFRIGERANT
FROM
A
SYSTEM
.
•E
NSURE
THE
CYLINDER
IS
FREE
OF
DAMAGE
WHICH
COULD
LEAD
TO
A
LEAK
OR
EXPLOSION
.
•E
NSURE
THE
HYDROSTATIC
TEST
DATE
DOES
NOT
EXCEED
5
YEARS
.
•E
NSURE
THE
PRESSURE
RATING
MEETS
OR
EXCEEDS
400
LBS
.
W
HEN
IN
DOUBT
,
DO
NOT
USE
THE
CYLINDER
.
WARNING
T
HE
U
NITED
S
TATES
E
NVIRONMENTAL
P
ROTECTION
A
GENCY
(”EPA”)
HAS
ISSUED
VARIOUS
REGULATIONS
REGARDING
THE
INTRODUCTION
AND
DISPOSAL
OF
REFRIGERANTS
INTRODUCED
INTO
THIS
UNIT
.
F
AILURE
TO
FOLLOW
THESE
REGULATIONS
MAY
HARM
THE
ENVIRONMENT
AND
CAN
LEAD
TO
THE
IMPOSITION
OF
SUBSTANTIAL
FINES
. T
HESE
REGULATIONS
MAY
VARY
BY
JURISDICTION
. S
HOULD
QUESTIONS
ARISE
,
CONTACT
YOUR
LOCAL
EPA
OFFICE
.
WARNING
T
O
AVOID
POSSIBLE
INJURY
,
EXPLOSION
OR
DEATH
,
PRACTICE
SAFE
HANDLING
OF
REFRIGERANTS
.
WARNING
T
HE
COMPRESSOR
PVE
OIL
FOR
R-410A
UNITS
IS
EXTREMELY
SUSCEPTIBLE
TO
MOISTURE
ABSORPTION
AND
COULD
CAUSE
COMPRESSOR
FAILURE
. D
O
NOT
LEAVE
SYSTEM
OPEN
TO
ATMOSPHERE
ANY
LONGER
THAN
NECESSARY
FOR
INSTALLATION
.
CAUTION
