Carrier AquaEdge 19XR series - EXAMPLE 21 - SETUP2 DISPLAY SCREEN; EXAMPLE 22 - LEADLAG DISPLAY SCREEN

41
INSTALL VENT PIPING TO RELIEF VALVES — The
19XR,XRV chiller is factory equipped with relief valves on the
cooler and condenser shells. Refer to Fig. 24 and Tables 10 and
11 for size and location of relief devices. Vent relief devices to
the outdoors in accordance with ANSI/ASHRAE 15 (latest
edition) Safety Code for Mechanical Refrigeration and all
other applicable codes.
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
piping 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.
Table 10 — Relief Valve Locations
NOTE: All valves relieve at 185 psi (1275 kPa).
Table 11 — Cooler/Relief Valve Arrangement
COMPRESSOR
OIL
SEPARATOR
CONDENSER
LEAVING
WATER
ENTERING
WATER
VALVE
5
VALVE
4
VALVE
2
CONTROL
PANEL
FRAME
ASSEMBLY
OIL
HEATER
VALVE
3
OIL FILL
FITTING
Fig. 23 — Pumpout Unit
a19-1546
DANGER
Refrigerant discharged into confined spaces can displace
oxygen and cause asphyxiation.
LOCATION
FRAME
SIZE
RELIEF VALVE
OUTLET SIZE
QUANTITY OF RELIEF VALVES
WITH DISCHARGE AND
COOLER INLET ISOLATION
WITHOUT DISCHARGE
AND COOLER
INLET ISOLATION
COOLER
1, 2 1 NPT FEMALE CONNECTOR 1 2
3-6 1
1
/
4
 NPT FEMALE CONNECTOR 1 2
7,8 1
1
/
4
 NPT FEMALE CONNECTOR 2 4
CONDENSER
1, 2 1 NPT FEMALE CONNECTOR 2 2
3-6 1
1
/
4
 NPT FEMALE CONNECTOR 2 2
HEAT EXCHANGER
FRAME SIZE
COMPRESSOR
FRAME SIZE
ISOLATION VALVES
COOLER ARRANGEMENT
SEE FIGURE NO.
CONDENSER ARRANGEMENT
SEE FIGURE NO.
2 2
Yes 24A 24E
No 24C 24E
3 2
Yes 24A 24E
No 24C 24E
3 3
Yes 24A 24E
No 24C 24E
4 3
Yes 24A 24E
No 24C 24E
5 3
Yes 24A 24E
No 24C 24E
5 4
Yes 24A 24E
No 24C 24E
6 4
Yes 24A 24E
No 24C 24E
7 4
Yes 24B 24F
No 24D 24F
7 5
Yes 24B 24F
No 24D 24F
8 5
Yes 24B 24F
No 24D 24F