Specifications

37
FORM 160.80-NOM1
YORK INTERNATIONAL
A baffle is welded into the top of the evaporator to col-
lect oil that falls from the compressor, preventing oil
from mixing with the refrigerant charge. The baffle pre-
vents liquid refrigerant from damaging the compressor.
CONDENSING WATER TEMPERATURE
YS Chillers can be operated with entering condensing
water temperature that is less than design conditions.
The following formula is used to calculate the minimum
entering condensing water temperature. Note the mini-
mum entering condensing water temperature is depen-
dant upon the operating load condition.
R-22 Refrigerant
ECW minimum =
LCWT+11+[(%of load)(15-design condenser deltaT)]
100
R-134a REFRIGERANT
ECW minimum =
LCWT+16+[(%of load)(10 - design condenser deltaT)]
100
Where:
ECW minimum
=
Minimum Entering Condensing Water Temperature ºF
LCWT =
Leaving Chilled Water Temperature ºF
Operating below the minimum entering condensing wa-
ter will not provide energy savings and will result in oil
management problems.
Special entering condensing water temperature controls
may be required when long condensing water circuits
are used and the chiller is being started with minimum
load available.
OIL SYSTEM
Refer to the Oil Piping Schematic Drawing, Figure 15
and the Oil Separator Drawing, Figure 20.
Oil flows from the oil separator into the compressor by
differential pressure. The oil flows from the oil separa-
tor through a 3 micron oil filter (or optional dual oil fil-
ters). Filtered oil then flows to a oil manifold that is lo-
cated at compressor port SB-2, see Figure 15.
FIG. 17 – OIL FILTER LOCATION
00203VIP
00204VIP
OIL
FILTER
OIL CHARGING
VALVE
3