Carrier POSITIVE PRESSURE STORAGE SYSTEM 19XB - Manual (Page 7)

Table 3 — 19XB Storage Tank Rated Dry Weight and Refrigerant Capacity
English
SIZE CODE
TANK OD
(in.)
DRY WEIGHT*
(lb)
MAXIMUM REFRIGERANT CAPACITY (lb)
ASHRAE/ANSI 15 UL 1963
R-22 R-134a R-22 R-134a
0428 24.00 2380 1842 1860 1704 1716
0452 27.25 3460 3527 3563 3264 3286
SI
SIZE CODE
TANK OD
(mm)
DRY WEIGHT*
(kg)
MAXIMUM REFRIGERANT CAPACITY (kg)
ASHRAE/ANSI 15 UL 1963
R-22 R-134a R-22 R-134a
0428 610 1080 836 844 773 778
0452 592 1569 1600 1616 1481 1491
LEGEND
ANSI — American National Standards Institute
ASHRAE — American Society of Heating, Refrigeration,
and Air Conditioning Engineers
UL — Underwriters’ Laboratories
*The above dry weight includes the pumpout unit weight of 210 lbs (95 kg).
Make Piping Connections — Figure 6 represents typi-
cal pumpout unit/chiller piping connections. Standard con-
nections for
1 ⁄
2
-in. OD copper tubing are provided. Install
the field-supplied FPT tee with pipe plug in the piping as
shown in Fig. 6. This tee is used for refrigerant charging.
NOTE: If any field piping runs exceed 50 ft in length, use
7 ⁄
8
-in. OD copper tubing to minimize pressure drop.
Pumpout unit water piping connections are shown in
Fig. 6. Both connections are 1 ⁄
2
-in. NPT (female). A shutoff
valve should be installed in the water line. Provide a means
for blowing water from the condenser coil at winter shut-
down to prevent freeze-up damage. Refer to the Job Data for
water piping particulars.
INSTALL VENT PIPING TO RELIEF DEVICES — The
pumpout storage tank is factory-equipped with relief de-
vices. Refer to Fig. 5 and Table 2 for size and location of the
relief devices. Vent the relief devices to the outdoors in ac-
cordance with ANSI/ASHRAE 15 Safety Code (latest edi-
tion) for Mechanical Refrigeration and all other applicable
codes. Relief devices are set to relieve at 300 psig
(2068 kPa).
Refrigerant discharged into confined spaces can dis-
place oxygen and cause asphyxiation.
1. If relief devices are manifolded, the cross-sectional area
of the relief pipe must at least equal the sum of the areas
required for individual relief pipes.
2. Provide a pipe plug near outlet side of each relief device
for leak testing. Provide pipe fittings that allow vent pip-
ing to be disconnected periodically for inspection of valve
mechanism.
3. Piping to relief devices must not apply stress to the de-
vice. Adequately support piping. A length of flexible tub-
ing or piping near the device is essential on spring-
isolated machines.
4. Cover the outdoor vent with a rain cap and place a con-
densation drain at the low point in the vent piping to pre-
vent water build-up on the atmospheric side of the relief
device.
Make Electrical Connections — See nameplate on
compressor of pumpout unit and Table 1 for motor electrical
data. Wire unit according to the diagram inside the control
box.
Fig. 7 is the wiring schematic for a complete system that
includes the 19XB storage tank and the pumpout unit.
Fig. 8 is the wiring schematic for the pumpout unit. Use this
schematic for installations that do not include an auxiliary
pumpout storage tank.
NOTE: Use copper conductors only.
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