Service Manual

SERVICING
101
S-17 CHECKING COMPRESSOR
WARNING
Herm etic compressor electrical terminal venting can
be dangerous. When insulating material which
supp
orts a hermetic compressor or electrical terminal
suddenly disintegrates due to physical abuse or as a
result of an electrical short between the terminal and
the compressor housing, the terminal may be
expelled, venting the vapor and liquid contents of the
compressor housing and system.
If the compressor terminal PROTECTIVE COVER and gasket (if
required) are not properly in place and secured, there is a remote
possibility if a terminal vents, that the vaporous and liquid
discharge can be ignited, spouting flames several feet, causing
potentially severe or fatal injury to anyone in its path.
This discharge can be ignited external to the compressor if the
terminal cover is not properly in place and if the discharge
impinges on a sufficient heat source.
Ignition of the discharge can also occur at the venting terminal
or inside the compressor, if there is sufficient contaminant air
present in the system and an electrical arc occurs as the terminal
vents.
Ignition cannot occur at the venting terminal without the pres-
ence of contaminant air, and cannot occur externally from the
venting terminal without the presence of an external ignition
source.
Therefore, proper evacuation of a hermetic system is essential
at the time of manufacture and during servicing.
To reduce the possibility of external ignition, all open flame,
electrical power, and other heat sources should be extinguished
or turned off prior to servicing a system.
10. Remove the bolts holding the motor bracket to the blower and
slide out of blower shell.
11. Replace the motor and reinstall blower and control box.
12. Reconnect power and test operation.