Carrier 38AH044-084- Manual
Carrier 38AH044-084– Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 3 – Step 2 — Check Compressor Mounting; Table 2A — Operational Corner Weights with; Table 2B — Operational Corner Weights with
- Page 13 – Fig. 10 — Outer View, Compressor Mounting
- Page 14 – Install a field-supplied filter drier and sight glasses in each; Table 5 — Liquid Lift; UNIT
- Page 15 – Fig. 13 — Double Suction Riser Construction
- Page 20 – Optional Single-Circuit Units
- Page 21 – Connect Tubing from Evaporator to Unit; Protect liquid valves from heat of brazing.; Piping Kit
- Page 22 – Kit Rails; Fig. 19 — Fully Assembled Piping and Trim Kit
- Page 23 – Step 4 — Make Electrical Connections; All field power enters the unit through a hole in the con-
- Page 26 – Table 13 — Control Circuit Electrical Data — 50/60 Hz
- Page 27 – Table 14 — Fan Motor Electrical Data
- Page 34 – Fig. 26 — Field Wiring, Single ModuPanelTM Control, Unit 38AH094
- Page 35 – Fig. 27 — Field Wiring, Single ModuPanelTM Control, Unit 38AH104
- Page 37 – Table 15 — Main Power Connection and Control Circuit Wiring; Step 5 — Install Accessories
- Page 38 – Compressor crankcase heaters must be on for 24 hours; Preliminary Checks; Check that electric power supply agrees with unit name-; Preliminary Oil Charge —; Each compressor is fac-
- Page 39 – With all fans operating, and all compressors on the cir-
- Page 40 – Table 16 — Index of Lead/Lag Circuits and Compressors; LAG CIRCUIT; Check Compressor Oil Level —
- Page 46 – Table 17 — Fan Cycling Control — Psig (kPag); Switch Opens
- Page 47 – This switch has nonadjust-; Low-Pressure Switch —; Table 18 — Pressure Switch Settings,; Capacity Control; If suction pressure continues to drop after lead compres-; Pressure Relief —; Fig. 44 — Unloader Location and Settings
- Page 49 – Fig. 45 — Accumulator and Fusible Plug
- Page 50 – Fig. 47 — Timer Cycle
- Page 51 – Fig. 48 — Unit Control Box; Fig. 49 — Condenser Fan Adjustment
- Page 52 – COMPRESSOR; Do not reuse drained oil, and do not use any oil that has
- Page 53 – TROUBLESHOOTING; PROBLEM
- Page 55 – A. Preliminary Information; OUTDOOR UNIT
- Page 56 – COMP A1
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . .
1
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37
Step 1 — Rig and Place Unit
. . . . . . . . . . . . . . .
1
• DOMESTIC UNITS
• EXPORT UNITS
• PLACING UNITS
Step 2 — Check Compressor Mounting
. . . . .
3
• UNITS 38AH044-084
• UNITS 38AH094-134
Step 3 — Make Refrigerant Piping
Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
• UNITS 38AH044-084
• UNITS 38AH094-134
Step 4 — Make Electrical Connections
. . . . . .
23
• POWER SUPPLY
• FIELD POWER CONNECTIONS
• MAIN POWER
• CONTROL CIRCUIT WIRING
Step 5 — Install Accessories
. . . . . . . . . . . . . . .
37
• LOW-AMBIENT OPERATION
• MISCELLANEOUS ACCESSORIES
PRE-START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . .
37,38
START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-45
SERVICE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46-49
CONTROL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-52
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . 53,54
START-UP CHECKLIST
. . . . . . . . . . . . . . . CL-1, CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can
be hazardous due to system pressures, electrical compo-
nents, 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.
• Use care in handling, rigging, and setting bulky
equipment.
ELECTRIC SHOCK HAZARD.
Open all remote disconnects before servicing
this equipment.
INSTALLATION
Step 1 — Rig and Place Unit —
All units are
designed for overhead rigging, and it is important that this
method be used. Lifting holes are provided in the frame base
rails, which are marked for rigging (see rigging label on the
unit and Tables 1, 2A, and 2B for rigging weights and center
of gravity). It is recommended that field-supplied pipes, of
sufficient length to extend at least 12-in. (305 mm) beyond
the frame, be passed through the holes.
To maintain unit stability while lifting, use 4 cables,
chains, or straps of equal length. Attach one end of
each cable to one pipe end and the other end of each
cable to the overhead rigging point.
Use spreader bars or frame to keep the cables, chains,
and straps clear of the unit sides. Leave standard coil pro-
tection packaging in place during rigging to provide protec-
tion to coils. Remove and discard all coil protection after
rigging cables are detached.
DOMESTIC UNITS — For units 38AH044-084, 124, and
134; standard unit packaging consists of coil protection only.
There is no standard packaging provided for units 38AH094
and 104. Skids are not provided. If overhead rigging is not
available at the jobsite, place the unit on a skid or pad before
dragging or rolling. When rolling, use a minimum of
3 rollers. When dragging, pull the pad or skid. Do not apply
force to the unit. When in final position, raise from above to
lift unit off the pad or skid.
EXPORT UNITS — All export units are mounted on skids
with vertical coil protection. Leave the unit on the skid until
it is in final position. While on the skid, the unit can be rolled
or skidded. Apply force to the skid, not to the unit. Use a
minimum of 3 rollers when rolling. When in final position,
raise from above to remove the skid.
PLACING UNITS
Units 38AH044-084 — Refer to Fig. 1 and 2 for airflow clear-
ances. Recommended minimum clearances are 6 ft (1829 mm)
for unrestricted airflow and service on sides of unit, 5 ft
(1524 mm) on ends, and unrestricted clear air space above
the unit. Provide ample space to connect liquid and suction
lines to indoor unit. For multiple units, allow 8 ft (2440 mm)
separation between units for airflow and service.
Do not forklift these units unless the unit is attached to
a skid designed for forklifting.
38AH044-134
Air-Cooled Condensing Units
50/60 Hz
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
Tab
3a
PC 111
Catalog No. 563-704
Printed in U.S.A.
Form 38AH-15SI
Pg 1
10-98
Replaces: 38AH-14SI
"Loading the manual" means you need to wait until the file loads and becomes available for online reading. Some manuals are very large, and the time they take to appear depends on your internet speed.
Other Manuals for Carrier 38AH044-084
Summary
Remove sheet metal cover panels from return-bend end of Module 124B or 134B. Place Module 124B or 134B inposition. The exposed return-bend ends of each module arenow opposite each other and facing the service space. Thecompressors of each module are on opposite sides of the unit. IMPORTANT: Modules ...
FACTORY-INSTALLEDSUCTIONLINE LOOP Fig. 9A — Typical Module with Cover Panels Removed Fig. 9B — Field-Installed Suction Line Loop 38AH044-084,124,134 MOUNTING SPRINGS SHIPMENT BOLTS SHIPMENT BOLTS 38AH094,104 MOUNTINGBOLTS RAIL BOLT (3) (2 SHOWN) RAIL BOLT (3) (2 SHOWN) MOUNTINGBOLTS Fig. 10 — Outer ...
Step 3 — Make Refrigerant PipingConnections The field-supplied liquid line solenoid valve must beinstalled at the evaporator to avoid possible compressordamage during unit operation. See Fig. 11 (for 38AH044-084 dual-circuit and 38AH094-134 units), or Fig. 12 (for38AH044-084 optional single-circuit ...
