Carrier 38HDL018, 38HDL024, 38HDL030, 38HDL036, 38HDL048 Installation, Start-up And Service Instructions Manual
...Page 1
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS ...................1
INSTALLATION ..............................1-6
Step 1 — Complete Pre-Installation
Checks ....................................1
• UNPACK UNIT
• INSPECT SHIPMENT
• CONSIDER SYSTEM REQUIREMENTS
Step 2 — Rig and Mount Unit .................3
• MOUNTING ON GROUND
• MOUNTING ON ROOF
• RIGGING
Step 3 — Complete Refrigerant Piping
Connections ...............................3
• CHECK ACCURATERt CONTROL
• MAKE PIPING SWEAT CONNECTIONS
• PROVIDE SAFETY RELIEF
Step 4 — Make Electrical Connections ........4
• POWER WIRING
• CONTROL CIRCUIT WIRING
• CONNECTIONS TO DUCT-FREE
FAN COIL UNITS
Step 5 — Accessory Installation ..............4
START-UP ...................................7
SERVICE ...................................7-9
MAINTENANCE .............................10
TROUBLESHOOTING ........................11
SAFETY CONSIDERATIONS
Install and servicing air-conditioning equipment can be hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should installor service air-conditioning equipment
Untrained personnel may perform basic maintenance such
as cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working
on air-conditioning equipment, observe safety precautions in
literature, and on tags and labels attached to unit.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have a
fire extinguisher available. Read these instructions thoroughly.Consult local building codes and National Electrical
Code (NEC) for special installation requirements.
INSTALLATION
Before installing or servicing system, always turn off
main power to system. There maybe more than one disconnect switch. Turn off accessory heater power if
applicable. Electrical shock can cause personal injury.
Step 1 — Complete Pre-Installation Checks
UNPACK UNIT — Move unit to final location. Remove carton from unit, being careful not to damage service valves or
grilles.
INSPECT SHIPMENT — File claim with shipping company if shipment is damaged or incomplete. Check unit nameplate to ensure unit matches job requirements.
CONSIDER SYSTEM REQUIREMENTS — Consult
local building codes and NEC for special installation
requirements.
Allow sufficient space for airflow clearance, wiring,
refrigerant piping, and servicing unit. See Fig. 1 and 2. Unit
can be mounted on a level pad directly on base legs or
mounted on raised pads at support points. See Fig. 2for center of gravity.
COOLING
Fig. 1 — 38HDL Condensing Unit
38HDL018-060
Light Commercial Condensing Units
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 3a 2a
PC 111 Catalog No. 563-885 Printed in U.S.A. Form 38HDL-2SI Pg 1 1-99 Replaces: 38HDL-1SI
Page 2
UNIT
SIZE
38HDL
ABCDEFGHJKLM
OPERATING
WEIGHT
ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm lb kg
018 2-1
1
⁄8638.2 3-015⁄16938.2 1-29⁄16369.9 1-4 406.4 1-117⁄16595.3 1-53⁄16436.6 1-51⁄2444.5 1-81⁄8511.2 1-1 330.2 0-65⁄8168.3 0-111⁄4285.8 0-05⁄815.88 130 58.9
024 2-1
1
⁄8638.2 3-015⁄16938.2 1-29⁄16369.9 1-4 406.4 1-117⁄16595.3 1-53⁄16436.6 1-51⁄2444.5 1-81⁄8511.2 1-1 330.2 0-63⁄4171.5 0-115⁄8295.3 0-05⁄815.88 136 61.6
030 2-1
1
⁄8638.2 3-015⁄16938.2 1-29⁄16369.9 1-4 406.4 1-117⁄16595.3 1-53⁄16436.6 1-51⁄2444.5 1-81⁄8511.2 1-1 330.2 0-63⁄4171.5 0-115⁄8295.3 0-03⁄419.05 161 73.0
036 2-1
1
⁄8638.2 3-015⁄16938.2 1-29⁄16369.9 1-4 406.4 1-117⁄16595.3 1-53⁄16436.6 1-51⁄2444.5 1-81⁄8511.2 1-1 330.2 0-63⁄4171.5 0-115⁄8295.3 0-03⁄419.05 185 83.9
048 3-1
3
⁄16944.6 3-89⁄161131.9 1-51⁄16433.4 1-67⁄16468.3 2- 61⁄2774.7 1-75⁄8498.5 2-55⁄8752.5 2-83⁄16817.6 1-17⁄8352.4 0-81⁄4209.5 0- 4 406.4 0-07⁄822.22 222 100.5
060 3-1
3
⁄16944.6 3-89⁄161131.9 1-51⁄16433.4 1-67⁄16468.3 2- 61⁄2774.7 1-75⁄8498.5 2-55⁄8752.5 2-83⁄16817.6 1-111⁄16347.7 0-81⁄8206.4 0- 37⁄8403.2 0-07⁄822.22 249 112.9
UNIT SIZE
38HDL
MINIMUM MOUNTING PAD DIMENSIONS
Support Feet
ft-in. mm
018,024,030 and 036 1-11 x 3-6 584.2 x 1066.8
048 and 060 2- 0 x 4-2 609.6 x 1270.0
NOTES:
1. Required clearances: With coilfacing wall, allow 69 (156.4mm) minimum clearance on coil side and
coil end, and 3 ft (914.4 mm) minimum clearance on compressor end and fan side. With fan facing
wall, allow 89 (203.2 mm) minimum clearanceon fanside andcoil end,and 3ft (914.4 mm) minimum
clearance on compressor end and coil side.With multi-unitapplication, arrangeunits sodischarge of
one does not enter inlet of another.
2. Dimensions in parenthesis are in millimeters.
3. Center of gravity .
Fig. 2 — 38HDL018-060 — Dimensional Drawing
2
Page 3
Step 2 — Rig and Mount Unit
MOUNTING ON GROUND — Mount unit on a solid, level
concrete pad. Position unit so water or ice from roof does
not fall directly into unit. Accessory stacking kits can be used
when units are to be stacked. If conditions or local codes
require unit to be fastened to a pad, 6 field-supplied tiedown
bolts should be used and fastened through slots provided in
unit mounting feet.
MOUNTING ON ROOF — Mount unit on level platform or
frame at least 6 in. above roof surface. Isolate unit and tubing from structure.
RIGGING
Be sure unit panels are securely in place prior to
rigging.
Keep unit upright. Lift unit using sling. Use cardboard or
padding under sling, and spreader bars to prevent sling damage to unit. See Fig. 3. See Fig. 2 for center of gravity reference. Install unit so coil does not face into prevailing winds.
If this is not possible and constant winds above 25 mph are
expected, use accessory wind baffle.
NOTE: Accessory wind baffles should be used on all units
with accessory low-ambient control.
Units may also be wall mounted using the accessory wall
mounting kit.
Step 3 — CompleteRefrigerant Piping Connections —
Outdoor units may be connected to indoor units
using field-supplied tubing of refrigerant grade and condition. Do not use less than 10 ft of interconnecting tubing.
DO NOT BURY MORE THAN 36 IN. OF REFRIGERANT PIPE IN THE GROUND. If any sectionofpipe
is buried, there must be a 6 in. vertical rise to the valve
connections on the outdoor unit. If more than the recommended length is buried, refrigerant may migrate to
the cooler, buried section during extended periods of system shutdown. This causes refrigerant slugging and could
damage compressor at start-up.
When more than 50 ft of interconnecting tubing and more
than 30 ft of vertical lift is used, refer to Part 3 of the Carrier
System Design Manual for design details, or contact your
local distributor.
If either refrigerant tubing or indoor coil is exposed to atmospheric conditions for longer than 5 minutes, it must be
evacuated to 1000 microns to eliminate contamination and
moisture in the system.
Run refrigerant tubes as directly as possible, avoiding unnecessary turns and bends. Suspendrefrigerant tubes so they
do not damage insulation on vapor tube and do not transmit
vibration to the structure.Also,whenpassingrefrigeranttubes
through the wall, seal opening so that vibration is not transmitted to structure. Leave some slack inrefrigerant tubes between structure and outdoor unit to absorb vibration. Refer
to separate indoor unit installation instructions for additional information.
CHECK ACCURATERt CONTROL — The correct
AccuRater (bypass type) refrigerant control is required for
cooling system capacity optimization.AnAccuRater device
with field-replaceable piston should be supplied with the
indoor unit. Refer toAccuRatermeteringdevicetableinseparate indoor unit installation instructions to determine thecorrect AccuRater piston size required for the condenser/
evaporator system being installed.
Note that one of 2 types of the AccuRater devices can be
found on the indoor unit. See Fig. 4. Do notinterchangecomponents between AccuRater device types. Matching of outdoor unit with indoor unit may require field replacement of
piston. Replace piston, if required, before connecting refrigerant lines. Piston replacement instructions are included
in the indoor unit installation instructions. After system installation is complete, see Refrigerant charging section on
page 8 to check and/or adjust refrigerant charge.
The 38HDL018-060 units may also be installedwith units
using a thermostatic expansion valve (TXV). If a TXV is
used, be sure to remove the piston from the indoor coil. See
installation instructions shipped with the TXV for proper positioning and adjustment.
MAKE PIPING SWEATCONNECTIONS — Remove plastic caps from liquid and suction service valves. Use refrigerant grade tubing. Service valves are closed from the factory and ready for brazing.After wrapping the service valve
Fig. 3 — Lifting Unit with Sling
NOTE: Arrow on AccuRater body points in free-flow direction, away
from the indoor coil.
Fig. 4 — AccuRater Metering Device Components
TYPE A (BYPASS TYPE)
TYPE B
3
Page 4
with a wet cloth, the tubing set can be brazed to the service
valve using either silver bearing or non-silver bearing brazing material. Consult local code requirements. Refrigerant
tubing and indoor coil are ready for leak testing.
NOTE: Unit is shipped with R-22 full factory charge indicated on nameplate.
Pass nitrogen or other inert gas throughpiping while braz-
ing to prevent formation of copper oxide.
To avoid damage while brazing, service valves should
be wrapped in a heat-sinking material such as a wet cloth.
When brazing tubing sets to the service valves, a brazing shield must be used to prevent damagetothe painted
unit surface.
PROVIDE SAFETY RELIEF — A fusible plug is located in
unit suction line; do not cap this plug. If local code requires
additional safety devices, install as directed.
Step 4 — Make Electrical Connections
Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground
may consist of electrical wire connected totheunitground
lug in control compartment, or conduit approved for
electrical ground when installed in accordance with
NEC, ANSI/NFPA (American National Standards
Institute/National Fire Protection Association) 70, and
local electrical codes. Failure to follow this warning could
result in the installer being liable for personal injury to
others.
Unit failure as a result of operation on improper line
voltage or excessive phase imbalance constitutes
abuse and may cause damage to electrical components.
Such operation will invalidate any applicable Carrier
warranty.
POWER WIRING — Unit is factory-wired for voltage shown
on nameplate. Provideadequate,fuseddisconnectswitchwithin
sight of unit, readily accessible but out of reach of children.
Provision for locking the switch open (off) is advisable to
prevent power from being turned on while unit is being
serviced. Disconnect switch, fuses, and field wiring must be
in compliance with NEC and applicable local codes. Use minimum 60 C wire for field power connection.
Route power wires through opening in the unit side panel
and connect in unit control box as shown on unit label diagram and Fig. 5 and 6. Unit must be grounded.
CONTROL CIRCUIT WIRING — Control voltage is 24 v.
See Fig. 5 and unit label diagram for field-supplied wiring
details. Route control wire through opening in the unit side
panel to connection in unit control box.
NOTE: For wire runs up to 50 ft (15 m), use no. 18 AWG
(American Wire Gage) insulated wire (35 C minimum). For
50 to 75 ft, use no. 16 AWG insulated wire. For more than
75 ft, use no. 14 AWG insulated wire.
NOTE: Operation of unit on improper line voltage constitutes abuse and could affect Carrier warranty. See Table 2.
Do not install unit in system where voltage may fluctuate
above or below permissible limits.
See Table 2 for recommended fuse sizes. When making
electrical connections, provide clearance at unit for refrigerant piping connections.
Use indoor unit transformer as 24-v (40-va minimum)
supply for system as shown in Fig. 5 or use accessory
transformer.
Before performing service or maintenance, be sure the
indoor unit main power switch is off and indoor blower
has completely stopped. Failure to do so may result in
electrical shock or injury from rotating fan blades.
CONNECTIONS TO DUCT-FREE FAN COIL UNITS —
The 38HDL units are designed for easy match-up to 40QAB,
40QKB, and 40QNB018,024 duct-free fan coils. These units
provide 24-v power for the outdoor unit from the fan coil.
Connect the Y and C terminals of the indoor unit to the blue
and brown wires of the outdoor unit with 20 gage (minimum) thermostat wire.
Step 5 — Accessory Installation — Install all unit
accessories per accessory installation instructions prior to
start-up.
Do not use accessory Time Guardt II device when combining a 38HDL unit with 40QNB indoor units.
When ambient temperature will fall below 55 F, accessory low ambient controller is required. When accessorylow
ambient controller kit is used, unit should also be equipped
with accessory winter start kit and accessory wind baffles.
4
Page 5
Table 1 — Physical Data
UNIT 38HDL 018 024 030 036 048 060
NOMINAL CAPACITY (Btuh) 18,000 24,000 30,000 36,000 48,000 60,000
UNIT OPERATING WEIGHT (lb) 130 136 161 185 222 249
COMPRESSOR Hermetic
Type Copeland Copeland Copeland Tecumseh Copeland Copeland
Scroll Scroll Scroll Reciprocating Scroll Scroll
Model ZR18KC-PFV ZR24KC-PFV ZR28KC-PFV AV5535G ZR47KC-PFV ZR57KC-PFV
Oil (oz) Initial/Recharge 25/21 25/21 38/34 54/50 42/38 56/52
OUTDOOR FAN Propeller Type, Direct Drive, Horizontal
Rpm 850 850 850 850 850 850
Diameter (in.)...No. of Blades 18...3 18...3 18...3 18...3 24...3 24...3
Fan Pitch (Deg) 25 27 27 31 24 24
Motor Hp
1
⁄
8
1
⁄
8
1
⁄
8
1
⁄
8
1
⁄
4
1
⁄
4
Nominal Airflow (Cfm) 1720 1720 1720 1720 3900 3900
OUTDOOR COIL Copper Tube, Aluminum Plate Fin
Face Area (sq ft)...No. of Rows 6.1...1 6.1...1.5 6.1...2 6.1...2 12.3...1.5 12.3...1.75
Fins per in. 20 20 20 20 20 20
CONTROLS PRESSURESTAT
SETTINGS
Low Pressure
Cutout (psig) 7±3
Cut-In (psig) 22±5
Fusible Plug 210 F
5
Page 6
LEGEND
C—Contactor (12-va)
HC — Heating Control
IFM — Indoor-Fan Motor
IFR — Indoor-Fan Relay
TRANS — Transformer
Field Wiring
Factory Wiring
*The IFR and IFM are located in indoor unit on heating-cooling
applications. If accessory IFR is required for cooling-only applictions, locate (IFR) in fan coil.
NOTE: Refer to unit wiring label for wire colors: BRN to BLU and C
to Y connections.
Fig.5—Typical Control Circuit Connections
Fig. 6 — Line Power Connections
LEGEND
NEC — National Electrical Code
TB — Terminal Board
TB Connections
Field Wiring
Factory Wiring
6
Page 7
START-UP
Preliminary Checks
1. Check that all internal wiring connections are tight and
that barriers, covers, and panels are in place.
2. Make certain field electrical power source agrees with unit
nameplate rating.
3. Open all service valves.
LeakT est— Field piping and fan coilmust be leak tested
by pressure method described in Carrier Standard Service
Techniques Manual, Chapter 1, Section 1-6. Use R-22 at
approximately 25 psig backed up with an inert gas to a total
pressure not to exceed 245 psig.
Evacuate and Dehydrate — Field piping and fan coil
must be evacuated and dehydrated by either of the methods
described in Carrier Standard Service Techniques Manual,
Chapter 1, Section 1-7.
Charge System — Release factory charge into sys-
tem by opening (backseating) liquid and suction line service
valves. Add charge amount as required for the total system.
Refer to separate indoor unit installation instructions for the
required total system charge when connected to the indoor
unit.
To Start Unit
NOTE: When using in conjunction with 40QAB, 40QKB,
or 40QNB fan coils, refer to start-up instructions included
with fan coil for correct start-up procedures.
Be sure that field disconnect is closed. Set room thermostat below ambient temperature. Operate unit for 15 minutes, then check system refrigerant charge. See Refrigerant
Charging section on page 8.
Unit compressor starts after a 5-minute delay if equipped
with accessory Time Guardt II device.
SERVICE
Before performing recommended maintenance, be
sure unit main power switch is off. Failure to do so may
result in electrical shock or injury from rotating fan blade.
Outdoor Fan — A reinforced wire mount holds theout-
door fan assembly in place. See Fig. 7 for proper mounting
positions.
High-Pressure Relief Valve — Valve is located in
compressor. Relief valve opens at a pressure differential of
approximately 450 ± 50 psig between suction (low side) and
discharge (high side) to allow pressure equalization.
InternalCurrentandT emperatureSensitiveOverload —
Control resets automatically when internal compressor motor temperature drops to a safe level (overloads
may require up to 45 minutes to reset). When an internal
overload is suspected of being open, checkby using an ohmmeter or continuity tester. If necessary, refer to Carrier Standard Systems Techniques Manual, Chapter 2, for complete
information.
PumpdownProcedure — The system may be pumped
down in order to make repairs on low side without losing
complete refrigerant charge.
To pumpdown:
1. Attach pressure gage to suction service valve gage port.
2. Frontseat the liquid line valve.
The 38HDL unitcoilsholdonlythefactory-designated
amount ofrefrigerant.Additionalrefrigerantmaycause
units to relieve pressure through compressor internal pressure relief valve (indicated by sudden rise
of suction pressure) before suction pressure reaches
5 psig. If this occurs, shut offunit immediately, then
frontseat the suction valve and remove and recover
excess refrigerant following accepted practice.
3. Start unit and run until suction pressure reaches 5 psig.
4. Shut unit off and frontseat suction valve.
5. Depressurize low side of unit and recover refrigerant fol-
lowing accepted practice.
DIMENSIONS (in.)
38HDL018 38HDL024-036 38HDL048-060
0.433 0.709 0.16
Fig. 7 — Condenser Fan Mounting Positions
7
Page 8
Table 2 — Electrical Data
UNIT SIZE
38HDL
V-PH-Hz
OPERATIONAL
VOLTAGE*
COMPRESSOR POWER SUPPLY
Min Max RLA LRA Fan FLA MCA
Max Fuse† or HACR-Type
Ckt Bkr Amps
018
208/230-1-60 187 254
10.7 47.0 .70 14.1 25
024 13.2 59.0 .70 17.2 30
030 15.7 73.0 .70 20.3 35
036 14.2 86.7 .70 18.5 30
048 24.3 131.0 1.45 31.8 50
060 28.6 170.0 1.45 37.2 65
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning, Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps per NEC Section 430-24
NEC — National Electrical Code
RLA — Rated Load Amps (Compressor)
*Permissible limits of the voltage range at which unit will operate
satisfactorily.
†Time-delay fuse.
NOTES:
1. Control circuit is 24 v on all units and requires an external power
source.
2. All motors and compressors contain internal overload protection.
3. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the
overcurrent protective device for the unit shall be fuse or HACR
breaker.
4. Motor RLAvalues are established in accordance with UL (Underwriters’ Laboratories) Standard 465.
Low Pressure Switch — This switch, mounted on the
suction line, has fixed non-adjustable settings. Tocheck pressure switch, attach pressure gage to suction service valve gage
port. Slowly close liquid shutoff valve and allow compressor to pump down. Do not allow compressor to pump down
below 2 psig. Compressor should shut down when suction
pressure drops to cutout pressure in Table 1, and should restart when pressure builds up to cut-in pressure shown after
accessory CLO (compressor lockout) switch has been reset
and accessory Time Guardt II device has completed its timing cycle.
ServiceValves — The servicevalves in the outdoor unit
come from the factory frontseated. This means the refrigerant charge is isolated from the line-set connection ports.
To prevent damage to the valve, use a wet cloth or other
acceptable heat sink material on the valve before brazing.
The service valves must be backseated (turned counterclockwise until seated) before the service port caps can be
removed and the hoses of the gage manifold connected. In
this position, refrigerant has access from the through outdoor and indoor unit. The service valve cannot be field repaired; only a complete valve or valve stem seal and service
port caps are available for replacement.
AccuRaterT (Bypass Type) Device — See Fig. 4
for bypass type AccuRater device components. The piston
has a refrigerant metering hole through it.Theretainerforms
a stop for the piston in the refrigerant bypass mode and a
sealing surface for liquid line flare connection. To check, clean
or replace piston:
1. Shut off power to unit.
2. Pump down using Pumpdown Procedure section on
page 7.
3. Remove liquid line flare connection from AccuRater
device.
4. Pull retainer out of body, being careful not to scratch flare
sealing surface. If retainer does not pull out easily, carefully use locking pliers to remove retainer.
5. Slide piston out by inserting a small soft wire, with small
kinks, through metering hole. Ensure metering hole,sealing surface around piston cones, and flutedportion of piston are not damaged.
6. Clean piston refrigerant metering hole.
7. Replace retainer O-ring before reassembling AccuRater
device (O-ring part no. 99CC501052).
Refrigerant Charging
To prevent personal injury, wear safety glassesandgloves
when handling refrigerant. Do not overcharge system
— this can cause compressor flooding.
NOTE: Do not vent or depressurize unit refrigerant toatmosphere. Remove and recover refrigerant following practice.
SUPERHEAT METHOD (COOLING, NON-TXV) — To
check and adjust charge during cooling season, use Tables 3
and 4 and the following procedure:
1. Operate unit a minimum of 15 minutes before checking
charge.
2. Measure suction pressure by attaching a gage to suction
valve service port.
3. Measure suction line temperature by attaching a service
thermometer to unit suction line near suction valve. Insulate thermometer for accurate readings.
4. Measure outdoor coil inlet-air dry bulbtemperaturewith
a second thermometer.
5. Measure indoor coil inlet-air wet bulb temperature with
a sling psychrometer.
6. Refer to Table 3. Find air temperature entering outdoor
coil and wet-bulb temperature entering indoor coil. At
this intersection, note the superheat temperature.
7. Refer to Table 4. Find superheat temperature and suction pressure and note suction line temperature.
8. If unit has higher suction line temperature than charted
temperature, add refrigerant until charted temperature is
reached.
9. If unit has lower suction line temperature than charted
temperature, remove and recover refrigerant until charted
temperature is reached.
10. If air temperature entering outdoor coil or pressure at
suction valve changes, charge to new suction line temperature indicated on chart.
NOTE: The above procedure is independent of indoor air
quantity.
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Page 9
SUBCOOLING METHOD (COOLING, TXV) — To check
and adjust charge during cooling season, use Table 5 and the
following procedure:
1. Operate unit a minimum of 15 minutes before checking
charge.
2. Measure liquid line temperature near liquid line service
valve, and measure liquid pressure at liquid line service
valve. Use a digital thermometer for all temperature
measurements. DO NOT use mercury or dial-type
thermometers.
3. Refer to Table 5. Find temperature point at which the required subcooling temperature intersects the measured liquid line pressure.
4. If the measured liquid line temperature does not agree
with the required liquid line temperature, ADD refrigerant to lower the temperature, or REMOVE refrigerant to
raise the temperature (allow a tolerance of±3F).
Table 3 — Superheat Charging Table
(Superheat Entering Suction Service Valve)
OUTDOOR
TEMP (F)
INDOOR COIL ENTERING AIR (F) WB
50 52 54 56 58 60 62 64 66 68 70 72 74 76
55 9 12141720232629323537404245
60 7 10121518212427303335384043
65 * 6 10 13 16 19 21 24 27 30 33 36 38 41
70 * * 71013161921242730333639
75 * * * 6 9 12 15 18 21 24 28 31 34 37
80 ****581215182125283135
85 ******811151922263033
90 ******59131620242731
95 *******6101418222529
100 ********81215202327
105 ********5913172226
110 *********611152025
115 **********8141823
LEGEND
WB — Wet Bulb
*Do not attempt to charge system under these conditions or refrig-
erant slugging may occur.
Table 4 — Required Suction-Tube Temperature (F)
(Entering Suction Service Valve)
SUPERHEAT
TEMP (F)
SUCTION PRESSURE AT SERVICE PORT (psig)
61.5 64.2 67.1 70.0 73.0 76.0 79.2 82.4 85.7
0 35 36 39 41 43 45 47 49 51
2 37 39 41 43 45 47 49 51 53
4 39 41 43 45 47 49 51 53 55
6 41 43 45 47 49 51 53 55 57
8 43 45 47 49 51 53 55 57 59
10 45 47 49 51 53 55 57 59 61
12 47 49 51 53 55 57 59 61 63
14 49 51 53 55 57 59 61 63 65
16 51 53 55 57 59 61 63 65 67
18 53 55 57 59 61 63 65 67 69
20 55 57 59 61 63 65 67 69 71
22 57 59 61 63 65 67 69 71 73
24 59 61 63 65 67 69 71 73 75
26 61 63 65 67 69 71 73 75 77
28 63 65 67 69 71 73 75 77 79
30 65 67 69 71 73 75 77 79 81
32 67 69 71 73 75 77 79 81 83
34 69 71 73 75 77 79 81 83 85
36 71 73 75 77 79 81 83 85 87
38 73 75 77 79 81 83 85 87 89
40 75 77 79 81 83 85 87 89 91
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Page 10
MAINTENANCE
Before performing recommended maintenance, be sure
unit main power is off. Failure to do so may result in
electrical shock or injury from rotating fan blades.
Lubrication
FAN-MOTOR BEARINGS — Oiling holes are provided at
each end of the condenser-fanmotor. Remove fan motor and
lubricate motor with 32 drops (16drops per hole) of SAE-10
(Society of Automotive Engineers) non-detergent oil at intervals described below:
• Annually, when environment is very dirty, ambient temperature is higher than 105 F, and average unit operating
time exceeds 15 hours a day, or
• Every three years, when environment is reasonably clean,
ambient temperature is less than 105 F, and unit operating
time averages 8 to 15 hours per day, or
• Every 5 years when environment is clean, ambient temperature is less than 105 F, and unit operating time averages less than 8 hours per day.
COMPRESSOR — Compressor contains factory oil charges;
replace oil when lost. See Table 1 for oil recharge and refer
to Carrier Standard Service Techniques Manual, Chapter 1,
pages 1 to 21 for oil recharging procedure. See Table 6 for
recommended compressor oils.
Cleaning Coils — Coil should be washed out with wa-
ter or blown out with compressed air. Note that the blowthru design causes dirt and debris to build up on the inside
of the coils.
Clean coil annually or as required bylocation and outdoor
air conditions. Inspect coil monthly and clean as required.
Fins are NOT continuous through coil sections. Dirt and debris may pass through the first section, become trapped between the rows of fins, and restrict condenser airflow. Use a
flashlight to determine if dirt ordebris has collected between
coil sections. Clean coil as follows:
1. Turn off unit power.
2. Use a garden hose or other suitable equipment to flush
coil from the outside to remove dirt. Be sure to flush all
dirt and debris from drain holes in the base of unit. Fan
motors are waterproof.
Table 5 — Required Liquid Line Temperature (F) (At Service Valve)
REQUIRED
SUBCOOLING (F)
LIQUID PRESSURE AT SERVICE VALVE (PSIG)
134 141 148 156 163 171 179 187 196 205 214 223 233 243 253 264 274 285 297 309 321 331 346 359
0 76 79 82 85 88 91 94 97 100 103 106 109 112 115 118 121 124 127 130 133 136 139 142 145
5 71 74 77 80 83 86 89 92 95 98 101 104 107 110 113 116 119 122 125 128 131 134 137 140
10 66 69 72 75 78 81 84 87 90 93 96 99 102 105 108 111 117 120 123 126 129 129 132 135
15 61 64 67 70 73 76 79 82 85 88 91 94 97 100 103 106 109 112 115 118 121 124 127 130
20 56 59 62 65 68 71 74 77 80 83 86 89 92 95 98 101 104 107 110 113 116 119 122 125
25 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99 102 105 108 111 114 117 120
Table 6 — Recommended Compressor Oils
RECOMMENDED
OIL
UNIT 38HDL
018 024 030 036 048 060
3GS
Calumet RO-15
Sontex 200LT •••
•
•
••
10
Page 11
TROUBLESHOOTING
TROUBLESHOOTING CHART — COOLING CYCLE
11
Page 12
Copyright 1999 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 3a 2a
PC 111 Catalog No. 563-885 Printed in U.S.A. Form 38HDL-2SI Pg 12 1-99 Replaces: 38HDL-1SI
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