Daikin WSC063 User Manual

IM 1044-2 Centrifugal Chillers 19
Oil Coolers
WARNING
This unit contains POE lubricants that must be handled carefully and the proper protective equipment (gloves, eye protection,
etc.) must be used when handling POE lubricant. POE must not come into contact with any surface or material that might be
harmed by POE, including certain polymers (e.g. PVC/CPVC and polycarbonate piping).
Daikin centrifugal chillers have a factory-mounted, water-cooled oil cooler, temperature-controlled water
regulating valve and solenoid valve per compressor. WSC/HSC single compressor cooling water connections are
located near the compressor and are shown on the specific unit certified drawings. Also see Figure 11 on page 21.
Dual compressor chillers, WDC/ 063 - 126 and WCC 100 - 126 are equipped as above, but the water piping for
the two oil coolers is factory-piped to a common inlet and outlet connection located in the tube sheet under the
evaporator. The exception to this is the WDC 100 and 126 with 16-foot shells, where the common connections are
centered at the rear of the unit. See Figure 12 on page 21.
F
ield water piping to the inlet and outlet connections must be installed according to good piping practices and
include stop valves to isolate the cooler for servicing. A cleanable filter (40 mesh maximum), and drain valve or
plug must also be field-installed. The water supply for the oil cooler should be from the chilled water circuit or from
a clean, independent source, no warmer than 80°F (27°C), such as city water. When using chilled water, it is
important that the water pressure drop across the evaporator is greater than the pressure drop across the oil cooler or
insufficient oil cooler flow will result. If the pressure drop across the evaporator is less than the oil cooler, the oil
cooler must be piped across the chilled water pump, provided that its pressure drop is sufficient. The water flow
through the oil cooler will be adjusted by the unit's regulating valve so that the temperature of oil supplied to the
compressor bearings (leaving the oil cooler) is between 95°F and 105°F (35°C and 40°C).
NOTE: The system must be designed for the highest cooling water temperature possible, which may occur for a
short time during startup.
Table 7, WSC, Oil Cooler Data
T
able 8, WSC with Mounted VFD, Oil Cooler Data
NOTE:
1. Dual compressor units have twice the cooling water flow of the comparable
WSC chiller, the pressure drop will be the
s
ame. Pressure drops include valves on the unit.
!
Hot Side
POE Lube
Cold Side Water
WSC 063 - 087
Flow, gpm 9.9 11.9 2.9 2.0 1.54
Inlet Temperature, °F
118.0 80.0 65.0 55.0 45.0
Outlet Temperature, °F
100.0 87.3 94.5 98.3 101.4
Pressure Drop, psi - 4.3 0.3 0.14 0.09
WSC 100 - 126
Flow, gpm 15.8 21.9 5.11 3.5 2.7
Inlet Temperature,
°
F
120.0 80.0 65.0 55.0 45.0
Outlet Temperature, °F
100.0 87.0 95.0 99.0 102.3
Pressure Drop, psi - 3.78 0.23 0.11 0.07
Hot Side
POE Lub.
Cold Side Water
WSC/HSC 063 - 087
Flow, gpm
9.9
13.4
4.0
2.9
2.3
Inlet Temperature,
°
F
118.0
80.0
65.0
55.0
45.0
Outlet Temperature, °F
100.0
90.3
99.6
103.1
105.6
Pressure Drop, ft.
-
30.5
6.7
4.8
3.6
WSC/HSC 100 - 126
Flow, gpm
15.8
24.4
7.0
5.0
4.0
Inlet Temperature, °F
120.0
80.0
65.0
55.0
45.0
Outlet Temperature,
°
F
100.0
89.8
100.1
103.6
106.2
Pressure Drop, ft.
-
30.6
15.7
11.4
9.3

Daikin WSC063 Specifications

General

Brand	Daikin
Model	WSC063
Category	Chiller
Language	English