Carrier GEMINI 09DPS018 Installation, Start-Up And Maintenance Instructions

Installation, Start-Up and Maintenance
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
Step 1 - Inspect Shipment . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 2
• DOMESTIC UNITS
• EXPORT UNITS
• PLACING UNITS
Step 3 - Complete Refrigerant Piping . . . . . . . . . . 19
• GENERAL
• EVACUATION AND DEHYDRATION
• REFRIGERANT LINE SIZING
• PRESSURE RELIEF
• REFRIGERANT RECEIVER
• LIQUID LIFT
Step 4 - Make Electrical Connections . . . . . . . . . . 23
• GENERAL
• POWER WIRING
• CONTROL CIRCUIT WIRING
• FIELD CONTROL WIRING
Step 5 - Check Condenser Fans. . . . . . . . . . . . . . . . 30
Step 6 - Configure Optional Motormaster
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Step 7 - Install Accessories . . . . . . . . . . . . . . . . . . . . 34
• LOW-AMBIENT OPERATION
• MISCELLANEOUS ACCESSORIES
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37,38
System Evacuation and Dehydration . . . . . . . . . . . . 37
Preliminary Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Adjust Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . 37
Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . 37
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Recommended Maintenance Schedule . . . . . . . . . . 39
Microchannel Heat Exchanger (MCHX)
Condenser Coil Maintenance and Cleaning
Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

SAFETY CONSIDERATIONS

Installing, starting up, and servicing this equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics
should install, start up, and service this equipment.
Untrained personnel can perform basic maintenance func-
tions, such as cleaning coils. All other operations should be
performed by trained service personnel.
When working on the equipment, observe precautions in the
literature, and on tags, stickers, and labels attached to the
equipment and any other safety precautions that may apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-530900013-01
Instructions
Page
®
V
Printed in U.S.A. Form 09DP-3SI
09DPS018-030, 09DPM035-130
Air-Cooled Condensing Units
• Use care in handling, rigging, and setting bulky
equipment.
Open all remote disconnects before servicing this equip-
ment. Failure to do so could result in personal injury from
electric shock.
Separate power sources (main and control power circuits)
are used for these units. Be sure both main and control
power circuits are disconnected before servicing. Failure to
do so could result in personal injury from electric shock.
o
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and gog-
gles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from sys-
tem using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen
and the work area should be well ventilated. Refrig-
erant in contact with an open flame produces toxic
gases.
d. Cut component connection tubing with tubing cutter
and remove component from unit. Use a pan to catch
any oil that may come out of the lines and as a gage
for how much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when nec-
essary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal
injury or death.
o
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes
and regulations. DO NOT leave refrigerant system open to
air any longer than the actual time required to service the
equipment. Seal circuits being serviced and charge with
dry nitrogen to prevent oil contamination when timely
repairs cannot be completed. Failure to follow these proce-
dures may result in damage to equipment.
Pg 1
GEMINI™ SELECT
50/60 Hz
WARNING
DANGER
WARNING
CAUTION
612 9-11 Replaces: 09DP-1SI