McQuay seasoncon ALP-067A Installation And Maintenance Data page 40

At the present time, Suniso #3GS oil is the only oil approved by
Copeland for use in these compressors.
tained at about the midpoint of the sight glass on the compressor
body.
Condensers
Condensers are air cooled and constructed with 3/8 0-D. copper tubes
bonded in a staggered pattern into rippled aluminum fins.
tenance is ordinarily required except the occasional removal of dirt
and debris from the outside surface of the fins.
taken not to damage the fins during cleaning.
purge valve on the condenser will prevent the buildup of non-conden-
sables.
Refrigerant Sight Glass
The refrigerant sight glasses should be observed periodically.
monthly observation should be adequate.)
dicates that there is adequate refrigerant charge in the system to
insure proper feed through the expansion valve.
ant in the sight glass indicates that the system is short of refri-
gerant charge.
"Liquid Line Accessory Kits" listed on page 12, an element inside
the sight glass indicates what moisture condition corresponds to a
given element color.
dition after a few hours of operation, the unit should be pumped down
and the cores in the filter-driers changed.
SERVICE ON THIS EQUIPMENT TO BE PERFORMED BY QUALIFIED REFRIGERATION SERVICE PER-
SONNEL. CAUSES FOR REPEATED TRIPPING OF SAFETY CONTROLS MUST BE INVESTIGATED AND
CORRECTED.
Filter-Driers
To change the filter drier core(s)
pumpdown switches (PSl & PS2) to the "man. pumpdown" position.
off all power to the unit and install jumpers from terminals 21 to
24 and 41 to 44.
unit by moving pumpdown switches (PSl & PS2) to the "auto. pumpdown"
position. Close the manual liquid line shutoff valve(s) and when
evaporator pressure reaches 0 PSIG,
(Sl) to the "off" position.
noid valve(s) and isolate the short section of refrigerant piping
containing the filter-drier(s).
filter-drier shell and replace the core(s).
After core replacement, replace the cover plate.
round the flange of the filter-drier shell is recommended after the
cores have been changed.
page 40
On sight glasses ordered from XcQuay as part of the
If the sight glass does not indicate a dry con-
Turn power to the unit back on and re-start the
This will close the liquid line sole-
The oil level should be main-
A clear glass of liquid in-
SERVICE
pump the unit down by moving
move the control stop switch
Remove the cover plate from the
No main-
Care should be
Periodic use of the
Bubbling refriger-
A leak check a-
(A
Turn