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FORM 160.55-O1 (604)
127
YORK INTERNATIONAL
CHECKING OP ER A TION
During operation, the fol low ing con di tions should be
periodically checked:
1. On start ing, the prerotation vanes should re main
closed.
2. Be sure the oil pump is operating while unit is run-
ning.
3. Check Oil Pressure display. A gradual de crease in
bearing oil pres sure of 5 to 10 PSI (with con stant
suc tion and discharge pres sures) may be an in di -
ca tion of a dirty Þ lter. The Þ lter should be replaced
when pres sure loss is 30% or more of the orig i nal
pres sure. The actual bearing oil pressure will vary
with com pres sor suction and discharge pres sures.
When a new sys tem is Þ rst operated under nor mal
full load conditions, the bearing oil pressure should
be re cord ed as a ref er ence point with which to com-
pare sub se quent read ings.
OPERATING LOG SHEET
A per ma nent daily record of system operating con di -
tions (tem per a tures and pres sures) recorded at regular
intervals throughout each 24 hour operating period
should be kept.
LD00466
FIG. 56 – MINIMUM ENTERING CONDENSING
WATER TEMPERATURE
FIG. 57 – LIQUID CHILLER LOG SHEETS
*NOTE: These items can be printed by an electronic printer connected to the Microboard
and pressing the PRINT key on the Keypad or automatically using the Data Logger feature.
LD00467
23889A
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