Pre-Start-Up; System Check; Start-Up And Operation - Carrier AquaSnap 30RAP011-060 Controls, Start-Up, Operation, Service, And Troubleshooting

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100% CAPACITY AT 4 mA
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PRE-START-UP

IMPORTANT: Before beginning Pre-Start-Up or Start-Up,
complete Start-Up Checklist for 30RAP Liquid Chiller at end
of this publication (pages CL-1 to CL-12). The checklist
assures proper start-up of a unit, and provides a record of unit
condition, application requirements, system information, and
operation at initial start-up.
Do not attempt to start the chiller until the following checks have
been completed.

System Check

1. Check all auxiliary components, such as chilled fluid pumps,
air-handling equipment, or other equipment to which the
chiller supplies liquid. Consult manufacturer's instructions.
Verify that any pump interlock contacts have been properly
installed. If the unit has field-installed accessories, be sure all
are properly installed and wired correctly. Refer to unit wiring
diagrams.
2. Use the scrolling marquee display to adjust the Cooling
Set Point.
3. Fill chilled fluid circuit with clean water (with recom-
mended inhibitor added) or other non-corrosive fluid to be
cooled. Bleed all air out of the high points of the system. If
chilled water is to be maintained at a temperature below
40°F (4.4°C) or outdoor temperatures are expected to be
below 32°F (0°C), an antifreeze of sufficient concentration
must be used to prevent freeze-up at anticipated suction
temperatures.
The chilled water loop must be cleaned before the unit is
connected.
NOTE: On units with digital scroll option do not check re-
frigerant charge if compressor is operating at less than 100%
capacity, digital operation can be disabled by configuring
A1.TY = NO (Configuration  UNIT  A1.TY)
4. Check tightness of all electrical connections.
5. Oil should be visible in the compressor sight glass(es). See
Fig. 39. For unit sizes 010-090, an acceptable oil level is
from / to / of sight glass. For unit sizes 100-150, an
1 3
8 8
acceptable oil level is from
should be removed unless the crankcase heater, if
equipped, has been energized for at least 24 hours. Adjust
the oil level as required. See Oil Charge section on page
60 for Carrier approved oils.
6. Electrical power source must agree with unit nameplate.
7. All condenser fan and factory-installed hydronic package
pump motors are phase. For non-HEVCF units, check for
75% CAPACITY AT 12 mA
2 4 6
DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT
Fig. 38 — 4 to 20-mA Demand Limiting
/ to / of sight glass. No oil
3 7
4 8
8 12
10 14
proper rotation of condenser fans first BEFORE
attempting to start pumps or compressors. For HEVCF
units, check the phase to ensure the supply power phase
rotation is clockwise A-B-C (L1-L2-L3). To reverse rota-
tion, interchange any two of the main incoming power
leads.
8. Be sure system is fully charged with refrigerant (see
Check Refrigerant Charge section on page 52).
9. Verify proper operation of cooler and hydronic package
heaters (if installed). Heaters operate at the same voltage
as the main incoming power supply and are single phase.
Heater current is approximately 0.4 amps for 460 and
575 v units. Heater current is approximately 0.8 amps for
230 v units.
a30-5515
OIL
SIGHT GLASS
Fig. 39 — Sight Glass Location

START-UP AND OPERATION

NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-12.
Crankcase heaters, if equipped, are wired into the control cir-
cuit, so they are always operable as long as the main power
supply disconnect is on (closed), even if any safety device is
open. Compressor heaters must be on for 24 hours prior to the
start-up of any compressor. Equipment damage could result if
heaters are not energized for at least 24 hours prior to com-
pressor start-up.
51
50% CAPACITY AT 20 mA
16 18 20
CAUTION