Actual Start-Up; Check Refrigerant Charge; Charge Adjustment For Brine Operation; Operating Limitations - Carrier AQUASNAP 30RAP010-150 Controls, Start-Up, Operation, Service, And Troubleshooting

compressor circuit breakers off/open. The crankcase heaters
are now energized.
Actual start-up should be done only
Actual Start-Up —
under supervision of a qualified refrigeration mechanic.
1. Be sure all service valves are open.
2. Using the scrolling marquee display, set leaving-fluid set

point (Set Points COOL
adjustment is necessary.
3. Start chilled fluid pump (if not configured for cooler
pump control).
4. Turn ENABLE/OFF/REMOTE CONTACT switch to
ENABLE position.
5. Allow unit to operate and confirm that everything is func-
tioning properly. Check to see that leaving fluid tempera-
ture agrees with leaving set point (Set Points

CSP.1) or (Set Points
used, with the control point (Run Status

CTPT).
6. Check the cooler leaving chilled water temperature to see
that it remains well above 32 F (0° C), or the brine freez-
ing point if the unit is a medium temperature brine unit.
7. Recheck compressor oil level (see Oil Charge section).
Check Refrigerant Charge —
shipped with a complete operating charge of R-410A and
should be under sufficient pressure to conduct a leak test after
installation. If there is no system pressure, admit nitrogen until
a pressure is observed and then proceed to test for leaks. After
leaks are repaired, the system must be dehydrated.
All refrigerant charging should be done through the
Schrader connection on the liquid line. Do NOT add refrigerant
charge through the low-pressure side of the system. If complete
charging is required, weigh in the appropriate charge for the
circuit as shown on the unit nameplate. If partial charging is re-
quired, operate circuit at full load and use an accurate tempera-
ture sensor on the liquid line as it enters the filter drier. Use the
Temperatures mode on the scrolling marquee display to show
the circuit saturated condensing temperature (Tempera-
 
tures CIR.A SCT.A)
SCT.B). Charging is most accurate at saturated discharge tem-
070
Leaving Brine
Ckt A Ckt B
Temperature
44F-35F
34F-15F 0.8 1.1

CSP.1). No cooling range

COOL
 
COOL CSP.2), or if reset is

VIEW
All 30RAP units are
1

or

(Temperatures

CIR.B
Table 20 — Charge Adjustment for Brine Operation
Charge to be Removed from Brine Operation (lb)
080 090
CktA Ckt B Ckt A
1.1 1.1 1.1
peratures of 120 to 125 F (49 to 52 C). Block condenser airflow
as required to reach this temperature range. Add refrigerant un-
til the system subcooling (SCT.A or SCT.B minus liquid line
temperature entering EXV) is approximately 15 to 17 F (–9.4
to –8.3 C). Refrigerant VAPOR only may be added to a circuit
through the 1 /
4
line.
Charge Adjustment for Brine Operation —
For 30RAP010-060 units, the 30RAP chiller does not require a
medium temperature brine modification at any temperature
within the chiller application range which is as low as 14 F
(–10 C) leaving fluid temperature.
For 30RAP070-150 units with MCXH condenser, see Table
20 for proper change adjustment. For 30RAP070-150 units
with RTPF condenser, no charge adjustment is needed.
Never charge liquid into low-pressure side of system. Do
not overcharge. Overcharging results in higher discharge
pressure, possible compressor damage, and higher power
consumption. During charging or removal of refrigerant, be
sure water is continuously circulating through the cooler to
prevent freezing.

Operating Limitations

COOLER FLOW RATES AND LOOP VOLUMES —
Refer to Table 21 for minimum and maximum cooler flow
rates. Refer to Table 22 for minimum fluid volume require-
ments.
/ -in.
4
TEMPERATURES (See Table 23 for 30RAP standard tem-
perature limits).
Do not operate with cooler leaving chiller water (fluid)
temperature (LCWT) below 40 F (4.4 C) for the standard
units, or below 15 F (–9.4 C) for units factory built for

medium temperature brine.
100
Ckt B Ckt A Ckt B Ckt A
No Change is Needed
1.1 1.1 2.0
46
-in. suction Schrader connection on the suction
CAUTION
CAUTION
115 130
Ckt B Ckt A Ckt B
2.0 2.0 2.0 3.0
150
Ckt A Ckt B
3.0 3.0