York YT Specifications download pdf (Page 119)

FORM 160.55-O1 (402)

119

YORK INTERNATIONAL

CHECKING OPERATION

During operation, the following conditions should be

periodically checked:

1. On starting, the prerotation vanes should remain

closed.

2. Be sure the oil pump is operating while unit is run-

ning.

3. Check Oil Pressure display. A gradual decrease in

bearing oil pressure of 5 to 10 PSI (with constant

suction and discharge pressures) may be an indica-

tion of a dirty filter. The filter should be replaced

when pressure loss is 30% or more of the original

pressure. The actual bearing oil pressure will vary

with compressor suction and discharge pressures.

When a new system is first operated under normal

full load conditions, the bearing oil pressure should

be recorded as a reference point with which to com-

pare subsequent readings.

OPERATING LOG SHEET

A permanent daily record of system operating condi-

tions (temperatures and pressures) 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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York YT Specifications Page 119