45
Fig. 53 — Optional Pumpout System Piping Schematic without Storage Tank — Configured to Store Refrigerant
in Cooler or Condenser (Unit with R Compressor Shown)
Fig. 54 — Pumpout Unit
INSTALL VENT PIPING TO RELIEF VALVES
The 23XRV chiller is factory equipped with relief valves on the
cooler and condenser shells. Refer to Fig. 55 and Table 21 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. Dual pressure relief valves are mounted on the 3-way valves
in some locations to allow testing and repair without transfer-
ring the refrigerant charge. Three-way valve shafts should be
turned either fully clockwise or fully counterclockwise so
only one relief valve is exposed to refrigerant pressure at a
time.
The flow area of discharge piping routed from more than one
relief valve, or more than one heat exchanger, must be greater
than the sum of the outlet areas of all relief valves that are
expected to discharge simultaneously. All relief valves within
a machinery room that are exposed to refrigerant may dis-
charge simultaneously in the event of a fire. Discharge piping
should lead to the point of final release as directly as possible
with consideration of pressure drop in all sections down-
stream of the relief valves.
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 device.
Adequately support piping. A length of flexible tubing or pip-
ing near the relief device is essential on spring-isolated
machines.
4. Cover the outdoor vent with a rain cap and place a condensa-
tion drain at the low point in the vent piping to prevent water
build-up on the atmospheric side of the relief device.
COOLER
CONTROL CENTER
COOLER REFRIGERANT
PUMPOUT VALVE
COOLER INLET
ISOLATION VALVE
COOLER CHARGING
VALVE
CONDENSER
CHARGING
VALVE
DISCHARGE ISOLATION
VALVE (OPTIONAL)
OIL
SEPARATOR
PUMPOUT
CONDENSER
WATER SUPPLY
AND RETURN
PUMPOUT
CONDENSER
2
3
4
5
PRESSURE
RELIEF SAFETY
VALVE
PUMPOUT
COMPRESSOR
SERVICE VALVE
1a
SERVICE VALVE ON
PUMPOUT UNIT
=
SERVICE VALVE ON
CHILLER
=
7
1a
1b
11
a23-1545
DANGER
EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in
serious injury, death, or property damage.
Pressure relief device sizing is based on the assumption that
there are no combustible materials within 20 ft (7.7 m) of the
pressure vessels.
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
DANGER
Refrigerant discharged into confined spaces can displace oxy-
gen and cause asphyxiation.
Summary of Contents for AquaEdge 23XRV
Page 53: ...53 Fig 58 23XRV Controls Schematic ...
Page 54: ...54 Fig 58 23XRV Controls Schematic cont FROM 2000767952 SHEET 3 ...
Page 55: ...55 Fig 58 23XRV Controls Schematic cont ...
Page 56: ...56 Fig 59 23XRV Controls Schematic Rockwell Standard Tier VFD Shown ...
Page 57: ...57 Fig 60 23XRV LF2 VFD Wiring Diagram ...
Page 65: ...65 Fig 70 23XRV Insulation Area Units with P Compressor ...
