Carrier AquaEdge 23XRV - Check Optional Pumpout Compressor; Liquid Piping; Check Relief Valves; Identify the VFD

72
Check Optional Pumpout Compressor Liquid
Piping —
If the optional pumpout storage tank and/or
pumpout system are installed, check to ensure the pumpout
condenser liquid has been piped in. Check for field-supplied
shutoff valves and controls as specified in the job data. Check
for refrigerant leaks on field-installed piping. See Fig. 40-43.
Check Relief Valves — Be sure the relief valves have
been piped to the outdoors in compliance with the latest edition
of ANSI/ASHRAE Standard 15 and applicable local safety
codes. Piping connections must allow for access to the valve
mechanism for periodic inspection and leak testing.
The 23XRV relief valves are set to relieve at the 185 psig
(1276 kPa) chiller design pressure.
Identify the VFD — The LiquiFlo
™
2.0 AC drive is a
PWM (Pulse Width Modulated), liquid-cooled drive that
provides vector and general purpose regulation for a wide
range of applications. Identify the drive from the Drive Part
Number on the drive’s nameplate and the model number
matrix in Fig. 46 and 47.
The control center is designed to operate in the following
environmental conditions:
Fig. 46 — VFD Nameplate
WARNING
DC bus capacitors retain hazardous voltage after input
power has been disconnected. After disconnecting input
power, wait 5 minutes for the DC bus capacitors to dis-
charge and then check the voltage with a voltmeter to
ensure the DC capacitors are completely discharged before
touching any internal components. Failure to observe this
precaution could result in severe bodily injury or loss of
life.
WARNING
The drive can operate at and maintain zero speed. The user
is responsible for assuring safe conditions for operating
personnel by providing suitable guards, audible or visual
alarms, or other devices to indicate that the drive is operat-
ing or may operate at zero speed. Failure to observe this
precaution could result in severe bodily injury or loss of
life.
CAUTION
The drive contains ESD (Electrostatic Discharge) sensitive
parts and assemblies. Static control precautions are
required when installing, testing, servicing, or repairing the
drive. Erratic machine operation and damage to, or destruc-
tion of equipment can result if this procedure is not
followed.
CONDITION SPECIFICATION
AMBIENT TEMPERATURE
(OUTSIDE NEMA 1
ENCLOSURE)
32 to 122 F (0° to 50 C)
STORAGE TEMPERATURE
(AMBIENT)
-40 to 149 F (-40 to 65 C)
HUMIDITY
5% to 95%
(non-condensing)
LF20 0608CC R
LF20 = LiquiFlo 2.0
Continuous Ampere Rating
and Frame Size
Coolant Method
R = Refrigerant R134a
Fig. 47 — Identifying the Drive Model Number