34
YORK INTERNATIONAL
lower than the value determined by referring to the for-
mula below:
100
Min. ECWT = LCHWT—C RANGE + 5 +
(
15 x % LOAD
)
where:
ECWT
= entering condensing water temperature
LCHWT
= leaving chilled water temperature
C RANGE = condensing water temperature range
At start-up, the entering condenser water temperature
may be as much as 25°F (14°C) colder than the standby
return chilled water temperature. Cooling tower fan
cycling will normally provide adequate control of the
entering condenser water temperature on most instal-
lations.
OPERATING LOG SHEET
A permanent daily record of system operating condi-
tions (temperatures and pressures) recorded at regu-
lar intervals throughout each 24 hour operating period
should be kept.
An optional status printer is available for this purpose
or Fig. 16 shows a log sheet used by YORK Personnel
for recording test data on chiller systems. It is avail-
able from the factory in pads of 50 sheets each under
Form 160.44-F6 and may be obtained through the near-
est YORK office. Automatic data logging is possible by
connecting the optional printer and programming the
DATA LOGGER function; refer to Form 160.49-N2.
FIG. 16
LIQUID CHILLER LOG SHEETS
*NOTE: These items can be printed by an electronic printer connected to TB8 of the Micro Board and pressing the
key
on the Micro Board or automatically using the Data Logger feature.
LD00467
23889A
