Safety Shutdown; Before Initial Start-Up; Job Data Required; Equipment Required - Carrier AquaEdge 19XRV series Operation, Maintenance And Installation Manual

The chiller should not be operated below design minimum
load without a hot gas bypass installed.
A safety shutdown is identical to
Safety Shutdown —
a manual shutdown with the exception that, during a safety
shutdown, the ICVC displays the reason for the shutdown, the
alarm light blinks continuously, and the spare alarm contacts
are energized.
After a safety shutdown, the
to clear the alarm. If the alarm condition is still present, the alarm
light continues to blink. Once the alarm is cleared, the operator
must press the or
CCN LOCAL

BEFORE INITIAL START-UP

Job Data Required

• list of applicable design temperatures and pressures (prod-
uct data submittal)
• chiller certified prints
• starting equipment details and wiring diagrams
• diagrams and instructions for special controls or options
• pumpout unit instructions

Equipment Required

• mechanic's tools (refrigeration) including T30 torx
• True RMS digital multimeter with clamp-on current probe
or True RMS digital clamp-on meter rated for at least 480
vac or 700 vdc
• electronic leak detector
• absolute pressure manometer or wet-bulb vacuum indicator
(Fig. 33)
• 500-v insulation tester (megohmmeter) for compressor
motors with nameplate voltage of 600 v or less, or a 5000-v
insulation tester for compressor motor rated above 600 v
Using the Optional Storage Tank and Pump-
Refer to Positive Pressure Chillers with
out System —
Storage Tanks section, page 84 for pumpout system prepara-
tion, refrigerant transfer, and chiller evacuation.
Remove Shipping Packaging —
aging material from the control panel, power panel, guide vane
actuator, motor cooling and oil reclaim solenoids, motor and
bearing temperature sensor covers, and the VFD.
Open Oil Circuit Valves —
ter isolation valves (Fig. 6 and 7) are open by removing the
valve cap and checking the valve stem.
Fig. 33 — Typical Wet-Bulb Type
Vacuum Indicator
softkey must be pressed
RESET
softkeys to restart the chiller.
Remove any pack-
Check to ensure the oil fil-
a19-658
The oil charge for the 19XRV compressor
Oil Charge —
depends on the compressor Frame size:
• Frame 2 compressor — 8 gal (30 L)
• Frame 3 compressor — 8 gal (30 L)
• Frame 4 compressor — 10 gal (37.8 L)
• Frame 4 compressor with split ring diffuser option —
12 gal (45 L)
• Frame 5 compressor — 18 gal (67.8 L)
• Frame E compressor — 18 gal (67.8 L)
The chiller is shipped with oil in the compressor. When the
sump is full, the oil level should be no higher than the middle
of the upper sight glass, and minimum level is the bottom
of the lower sight glass (Fig. 2 and 3). If oil is added, it must
meet Carrier's specification for centrifugal compressor use as
described in the Oil Specification section. Charge the oil
through the oil charging valve located near the bottom of the
transmission housing (Fig. 2 and 3). The oil must be pumped
from the oil container through the charging valve due to higher
refrigerant pressure. The pumping device must be able to lift
from 0 to 200 psig (0 to 1380 kPa) or above unit pressure. Oil
should only be charged or removed when the chiller is shut
down.
Tighten All Gasketed Joints and Guide Vane
Shaft Packing —
by the time the chiller arrives at the jobsite. Tighten all gasket-
ed joints and the guide vane shaft packing to ensure a leak-tight
chiller. Gasketed joints (excluding O-rings) may include joints
at some or all of the following:
• Waterbox covers
• Compressor suction elbow flanges (at compressor and at the
cooler)
• Compressor discharge flange
• Compressor discharge line spacer (both sides) if no isolation
valve
• Cooler inlet line spacer (both sides) if no isolation valve
• Hot gas bypass valve (both sides of valve)
• Hot gas bypass flange at compressor
Refer to Table 10 for bolt torque requirements.
Check Chiller Tightness —
proper sequence and procedures for leak testing.
The 19XRV chillers are shipped with the refrigerant
contained in the condenser shell and the oil charge in the
compressor. The cooler is shipped with a 15 psig (103 kPa)
refrigerant charge. Units may be ordered with the refrigerant
shipped separately, along with a 15 psig (103 kPa) nitrogen-
holding charge in each vessel.
To determine if there are any leaks, the chiller should be
charged with refrigerant. Use an electronic leak detector to
check all flanges and solder joints after the chiller is pressur-
ized. If any leaks are detected, follow the leak test procedure.
If the chiller is spring isolated, keep all springs blocked in
both directions to prevent possible piping stress and damage
during the transfer of refrigerant from vessel to vessel during
the leak test process, or any time refrigerant is being
transferred. Adjust the springs when the refrigerant is in operat-
ing condition and the water circuits are full.
64
Gaskets and packing normally relax
Figure 34 outlines the