60
Fig. 64 — 23XRV with Unit-Mounted VFD/Control Center (Unit with R Compressor Shown)
LEGEND
1
—
Disconnect
2
—
Unit-Mounted VFD/Control Center
3
—
Pressure Gauges
4
—
Chilled Liquid Pump
5
—
Condenser Liquid Pump
6
—
Chilled Liquid Pump Starter
7
—
Condenser Liquid Pump Starter
8
—
Vents
Piping
Control Wiring
Power Wiring
3. Field-installed piping with flexible connections must be arranged and
supported to avoid stress on the equipment and transmission of vibra-
tions from the equipment as well as to prevent interference with routine
access for the reading, adjusting and servicing of the equipment. Provi-
sions shall be made for adjustment in each plane of the piping and for
periodic and major servicing of the equipment.
4. Relief valves on the cooler and condenser must be vented to the out-
doors as discharging refrigerant in closed spaces may displace oxygen
and cause asphyxiation. All field-supplied refrigerant relief piping and
devices must be used in accordance with ANSI/ASHRAE standard 15.
5. Dual pressure relief valves are mounted on the 3-way valves in some
locations to allow testing and repair without transferring the refrigerant
charge. Three-way valve shafts should be turned either fully clockwise
or fully counterclockwise so only one relief valve is exposed to refriger-
ant pressure at a time.
6. 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 discharge 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.
7. Service access should be provided per standards ANSI/ASHRAE 15
and ANSI/NFPA 70 (NEC) and local safety codes. Unobstructed space
adequate for inspection, servicing and rigging of all major components
of the chiller is required. Shaded service areas are shown on the certi-
fied machine assembly drawing plan view and front view. See machine
assembly component disassembly drawing for component removal.
Space for rigging equipment and compressor removal is not shown. Iso-
lation valves are recommended on the evaporator and condenser piping
to each chiller for service.
8. The installation of chilled water and cooling tower water strainers should
be considered to prevent debris from collecting in the waterboxes and
degrading performance.
9. Flexible conduit should be used for the last few feet to the control center
for vibration isolation of power wiring and control wiring.
NOTES:
1. All wiring must comply with applicable codes.
2. Refer to Carrier System Design Manual for details regarding piping
techniques.
3. Wiring not shown for optional devices such as:
• remote start-stop
• remote alarm
• optional safety device
• 4 to 20 mA (1 to 5 VDC) resets
• optional remote sensors
• kW output
• head pressure reference
4. Service clearance under the chiller can be enhanced if the grout is not
extended along the entire length of the heat exchangers.
5. Carrier does not recommend pre-fab water piping.
IMPORTANT: Wiring and piping shown are for general point-of-connection
only and are not intended to show details for a specific installation. Certi-
fied field wiring and dimensional diagrams are available on request.
1
1
1
6
7
TO CHILLED LIQUID PUMP
TO CONDENSER LIQUID PUMP
2
1
MAIN COMPRESSOR
MOTOR POWER
FROM
COOLING
TOWER
FROM
LOAD
TO
COOLING
TOWER
TO
LOAD
3
3
8
8
DRAIN
5
4
Содержание AquaEdge 23XRV
Страница 53: ...53 Fig 58 23XRV Controls Schematic ...
Страница 54: ...54 Fig 58 23XRV Controls Schematic cont FROM 2000767952 SHEET 3 ...
Страница 55: ...55 Fig 58 23XRV Controls Schematic cont ...
Страница 56: ...56 Fig 59 23XRV Controls Schematic Rockwell Standard Tier VFD Shown ...
Страница 57: ...57 Fig 60 23XRV LF2 VFD Wiring Diagram ...
Страница 65: ...65 Fig 70 23XRV Insulation Area Units with P Compressor ...