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HIGH PRESSURE
NC OPEN > 185psig
2
SS-1
OFF
AUTO ON
2
2
a19-2447
2
Auto On
2
a19-2448
2
CONTROLS AND COMPONENTS
Figure 1 shows the major components of the PPS system.
Pumpout Unit
The pumpout unit consists of a hermetic compressor, a water
cooled refrigerant condenser, an oil separator, and prewired safety
and control devices. The pumpout unit comes equipped with a
4-way transfer valve manifold to interconnect both liquid and
GND
CONTROL POWER
H1
H4
TRANSFORMER
XFMR-1
69 VA
X2
X1
SAFETY
X2
1
ALARM SWITCH
LOW PRESSURE CONTROL
NC OPEN < 7 psia (-15.7 in. HG)
CLOSE > 9 psia (-11.6 in. HG)
3
Fig. 7 — 19XR Pumpout System Wiring Schematic
Control Power
H1
H4
Transformer
XFMR-1
69 VA
X2
X1
High Pressure
Safety
NC Open > 185 psig
X2
1
SS-1
Off
Low Pressure Control
NC Open < 7 psia {-15.7 in. HG}
Close > 9 psia {-11.6 in. HG}
3
Fig. 8 — Pumpout Unit Wiring Schematic
C
2 OL
C
2 OL
C
2 OL
L1
8
L2
7
WHT
LEVEL GAGE
X2
4
5
C
ORN
RED
HIGH LEVEL
GAGE ALARM
NC
(NC-OPEN AT
90% STORAGE
TANK LEVEL)
NO
WHT
2 OL
C
C
2 OL
2 OL
C
GND
L1
8
L2
7
X2
4
5
C
vapor transfer and to pressurize the chiller during transfer of re-
frigerant from chiller to storage tank.
CONTROLS
The pumpout unit has the following controls: manual/off/automat-
ic selector switch, transformer, .25 amp fuses for the primary side
of the transformer, 5 amp fuse for the secondary side of the trans-
former, contactor, terminal strip, high pressure cutout switch and
low pressure switch.
10
PUMP OUT
MTR-1
COMPRESSOR
HTR-1
CRANKCASE HEATER
240-600v
27-40 WATT
COPELAND PN 081-0031-03
LEGEND
C
— Contactor
FU
— Fuse
GND — Ground
HTR — Heater
MTR — Motor
NC
— Normally Closed
OL
— Overload
SS
— Selector Switch
Pump Out
MTR-1
Compressor
HTR-1
Crankcase Heater
240-600v
27-40 watt
LEGEND
C
— Contactor
FU
— Fuse
GND — Ground
HTR — Heater
MTR — Motor
NC
— Normally Closed
OL
— Overload
SS
— Selector Switch
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