38HDL018-060
Light Commercial Condensing Units
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Step 1 — Complete Pre-Installation
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
• UNPACK UNIT
COOLING
• 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 ACCURATER CONTROL
• MAKE PIPING SWEAT CONNECTIONS
• PROVIDE SAFETY RELIEF
Fig. 1 — 38HDL Condensing Unit
Step 4 — Make Electrical Connections . . . . . . . . 4
• POWER WIRING
• CONTROL CIRCUIT WIRING
• CONNECTIONS TO DUCT-FREE
FAN COIL UNITS
Before installing or servicing system, always turn off
main power to system. There may be more than one dis-
connect switch. Turn off accessory heater power if
applicable. Electrical shock can cause personal injury.
Step 5 — Accessory Installation . . . . . . . . . . . . . . 4
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 1 — Complete Pre-Installation Checks
UNPACK UNIT — Move unit to final location. Remove car-
ton from unit, being careful not to damage service valves or
grilles.
INSPECT SHIPMENT — File claim with shipping com-
pany if shipment is damaged or incomplete. Check unit name-
plate to ensure unit matches job requirements.
SAFETY CONSIDERATIONS
Install and servicing air-conditioning equipment can be haz-
ardous due to system pressure and electrical components. Only
trained and qualified service personnel should install or serv-
ice 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 thor-
oughly. Consult local building codes and National Electrical
Code (NEC, U.S.A. Standard) for special installation
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. 2 for cen-
ter of gravity.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 PC 111 Catalog No. 563-899 Printed in U.S.A. Form 38HDL-1SI Pg 1 9-98 Replaces: New
Tab 3a 2a
4
OPERATING
WEIGHT
UNIT
SIZE
A
B
C
D
E
F
G
H
J
K
L
M
38HDL
ft-in.
2-11⁄8
2-11⁄8
2-11⁄8
2-11⁄8
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
024
030
036
048
060
638.2 3-015⁄16
638.2 3-015⁄16
638.2 3-015⁄16
638.2 3-015⁄16
938.2 1-29⁄16 369.9 1-4
938.2 1-29⁄16 369.9 1-4
938.2 1-29⁄16 369.9 1-4
938.2 1-29⁄16 369.9 1-4
1131.9 1-51⁄16 433.4 1-67⁄16 468.3 2- 61⁄2
1131.9 1-51⁄16 433.4 1-67⁄16 468.3 2- 61⁄2
406.4 1-117⁄16 595.3 1-53⁄16 436.6 1-51⁄2 444.5 1-81⁄8
406.4 1-117⁄16 595.3 1-53⁄16 436.6 1-51⁄2 444.5 1-81⁄8
406.4 1-117⁄16 595.3 1-53⁄16 436.6 1-51⁄2 444.5 1-81⁄8
406.4 1-117⁄16 595.3 1-53⁄16 436.6 1-51⁄2 444.5 1-81⁄8
511.2 1-1
511.2 1-1
511.2 1-1
511.2 1-1
330.2 0-65⁄8 168.3 0-111⁄4 285.8 0-05⁄8 15.88 130
330.2 0-63⁄4 171.5 0-115⁄8 295.3 0-05⁄8 15.88 136
330.2 0-63⁄4 171.5 0-115⁄8 295.3 0-03⁄4 19.05 161
330.2 0-63⁄4 171.5 0-115⁄8 295.3 0-03⁄4 19.05 185
58.9
61.6
73.0
83.9
100.5
112.9
3-13⁄16 944.6 3-89⁄16
3-13⁄16 944.6 3-89⁄16
774.7 1-75⁄8
774.7 1-75⁄8
498.5 2-55⁄8 752.5 2-83⁄16 817.6 1-17⁄8
352.4 0-81⁄4 209.5 0- 4
406.4 0-07⁄8 22.22 222
498.5 2-55⁄8 752.5 2-83⁄16 817.6 1-111⁄16 347.7 0-81⁄8 206.4 0- 37⁄8 403.2 0-07⁄8 22.22 249
Fig. 2 — 38HDL018-060 — Dimensional Drawing
with a wet cloth, the tubing set can be brazed to the service
valve using either silver bearing or non-silver bearing braz-
ing material. Consult local code requirements. Refrigerant
tubing and indoor coil are ready for leak testing.
in compliance with NEC (U.S.A. Standard) 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 dia-
gram and Fig. 5 and 6. Unit must be grounded.
NOTE: Unit is shipped with R-22 full factory charge indi-
cated on nameplate.
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.
Pass nitrogen or other inert gas through piping while braz-
ing to prevent formation of copper oxide.
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 (15 to 23 m), use no. 16 AWG insulated wire. For
more than 75 ft (23 m), use no. 14 AWG insulated wire. See
Table 2 for conversion to European wire sizes.
To avoid damage while brazing, service valves should
be wrapped in a heat-sinking material such as a wet cloth.
NOTE: Operation of unit on improper line voltage consti-
tutes abuse and could affect Carrier warranty. See Table 3.
Do not install unit in system where voltage may fluctuate
above or below permissible limits.
When brazing tubing sets to the service valves, a braz-
ing shield must be used to prevent damage to the painted
unit surface.
See Table 3 for recommended fuse sizes. When making
electrical connections, provide clearance at unit for refrig-
erant piping connections.
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.
Use indoor unit transformer as 24-v (40-va minimum)
supply for system as shown in Fig. 5 or use accessory
transformer.
Step 4 — Make Electrical Connections
Unit cabinet must have an uninterrupted, unbroken elec-
trical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground
may consist of electrical wire connected to the unit ground
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 (U.S.A.
Standards), and local electrical codes. Failure to follow
this warning could result in the installer being liable for
personal injury to others.
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 (mini-
mum) thermostat wire.
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.
Step 5 — Accessory Installation — Install all unit
accessories per accessory installation instructions prior to
start-up.
Do not use accessory Time Guard II device when com-
bining a 38HDL unit with 40QNB indoor units.
When ambient temperature will fall below 55 F (13 C),
accessory low ambient controller (part no. 53DS900060) is
required. When accessory low ambient kit is used, unit should
also be equipped with accessory winter start kit and field-
fabricated wind baffles.
POWER WIRING — Unit is factory-wired for voltage shown
on nameplate. Provide adequate, fused disconnect switch within
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 ser-
viced. Disconnect switch, fuses, and field wiring must be
4
Table 1A — Physical Data (English)
UNIT 38HDL
018
18,000
130
024
24,000
136
030
30,000
161
036
36,000
185
048
48,000
222
060
60,000
249
NOMINAL CAPACITY (Btuh)
UNIT OPERATING WEIGHT (lb)
COMPRESSOR
Type
Hermetic
Copeland
Scroll
ZR18KC-PFV
25/21
Copeland
Scroll
ZR24KC-PFV
25/21
Copeland
Scroll
Tecumseh
Reciprocating
AV5535G
54/50
Copeland
Scroll
ZR47KC-PFV
42/38
Copeland
Scroll
ZR57KC-PFV
56/52
Model
Oil (oz) Initial/Recharge
ZR28KC-PFV
38/34
OUTDOOR FAN
Rpm
Propeller Type, Direct Drive, Horizontal
850
850
850
850
850
850
Diameter (in.)...No. of Blades
Fan Pitch (Deg)
Motor Hp
18...3
18...3
18...3
18...3
24...3
24...3
25
27
27
31
24
24
1
1
1
1
1
1
⁄
8
⁄
8
⁄
8
⁄
8
⁄
4
⁄4
Nominal Airflow (Cfm)
1720
1720
1720
1720
3900
3900
OUTDOOR COIL
Face Area (sq ft)...No. of Rows
Fins per in.
Copper Tube, Aluminum Plate Fin
6.1...1
20
6.1...1.5
20
6.1...2
20
6.1...2
20
12.3...1.5
20
12.3...1.75
20
CONTROLS PRESSURESTAT
SETTINGS
Low Pressure
Cutout (psig)
7 ± 3
22 ± 5
210 F
Cut-In (psig)
Fusible Plug
NOTE: Line sizes are for runs up to 25 feet.
Table 1B — Physical Data (SI)
UNIT 38HDL
018
5.3
024
7.0
030
8.8
036
10.5
83.9
048
14.1
060
17.6
NOMINAL CAPACITY (kW)
UNIT OPERATING WEIGHT (kg)
COMPRESSOR
58.9
61.6
73.0
100.6
112.9
Hermetic
Type
Copeland
Scroll
ZR18KC-PFV
.74/.62
Copeland
Scroll
ZR24KC-PFV
.74/.62
Copeland
Scroll
ZR28KC-PFV
1.13/1.00
Tecumseh
Reciprocating
AV5535G
Copeland
Scroll
ZR47KC-PFV
1.25/1.13
Copeland
Scroll
ZR57KC-PFV
1.66/1.54
Model
Oil (L) Initial/Recharge
1.60/1.48
OUTDOOR FAN
R/s
Propeller Type, Direct Drive, Horizontal
14.2
457...3
25
14.2
457...3
27
14.2
457...3
27
14.2
457...3
31
14.2
610...3
24
14.2
610...3
24
Diameter (mm)...No. of Blades
Fan Pitch (Deg)
Motor kW
.13
.09
.09
812
.09
.19
.19
Nominal Airflow (L/s)
812
812
812
1840
1840
OUTDOOR COIL
Copper Tube, Aluminum Plate Fin
2
Face Area (m )...No. of Rows
.57...1
.8
.57...1.5
.8
.57...2
.8
.57...2
.8
1.14...1.5
.8
1.14...1.75
.8
Fins per mm
CONTROLS PRESSURESTAT
SETTINGS
Low Pressure
Cutout (kPa)
48 ± 21
152 ± 34
99 C
Cut-In (kPa)
Fusible Plug
NOTE: Line sizes are for runs up to 7.6 m.
5
LEGEND
*The IFR and IFM are located in indoor unit on heating-cooling
applications. If accessory IFR is required for cooling-only applic-
tions, locate (IFR) in fan coil.
C
—
—
—
—
—
Contactor (12-va)
Heating Control
Indoor-Fan Motor
Indoor-Fan Relay
Transformer
HC
IFM
IFR
TRANS
NOTE: Refer to unit wiring label for wire colors: BRN to BLU and C
to Y connections.
Field Wiring
Factory Wiring
Fig. 5 — Typical Control Circuit Connections
LEGEND
NEC
TB
—
—
National Electrical Code
Terminal Board
TB Connections
Field Wiring
Factory Wiring
Fig. 6 — Line Power Connections
6
Table 2 — American/European Wire Conversions
SERVICE
AMERICAN
EUROPEAN
Industry
Standard
Size
American
Industry
Standard
Conversion
(mm)
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.
2
Size (mm )
18 AWG
16 AWG
14 AWG
12 AWG
10 AWG
8 AWG
0.82
1.30
1.0
1.5
2.08
2.5
3.30
4.0
Outdoor Fan — A reinforced wire mount holds the out-
door fan assembly in place. See Fig. 7 for proper mounting
positions.
5.25
6.0
6.36
10.0
16.0
25.0
—
6 AWG
13.29
21.14
26.65
33.61
42.39
53.49
67.42
85.00
107.19
4 AWG
3 AWG
2 AWG
35.0
50.0
—
70.0
95.0
120.0
1 AWG
1/0 AWG
2/0 AWG
3/0 AWG
4/0 AWG
250 kcmil
300 kcmil
350 kcmil
400 kcmil
500 kcmil
600 kcmil
126.64
151.97
177.90
202.63
253.29
303.95
150.0
—
185.0
240.0
300.0
—
DIMENSIONS — in. (mm)
38HDL018
38HDL024-036
38HDL048-060
LEGEND
American Wire Gage
Thousand Circular Mils
0.433 (11)
0.709 (18)
0.16 (4)
AWG
kcmil
—
—
Fig. 7 — Condenser Fan Mounting Positions
High-Pressure Relief Valve — Valve is located in
compressor. Relief valve opens at a pressure differential of
approximately 450 ± 50 psig (3100 ± 345 kPa) between suc-
tion (low side) and discharge (high side) to allow pressure
equilization.
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.
Internal Current and Temperature Sensitive Over-
load — Control resets automatically when internal com-
pressor 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, check by using an ohm-
meter or continuity tester. If necessary, refer to Carrier Stand-
ard Systems Techniques Manual, Chapter 2, for complete
information.
Leak Test — Field piping and fan coil must 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 (172 kPa) backed up with an inert gas
to a total pressure not to exceed 245 psig (1690 kPa).
Pumpdown Procedure — 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.
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.
The 38HDL unit coils hold only the factory-designated
amount of refrigerant. Additional refrigerant may cause
units to relieve pressure through compressor inter-
nal pressure relief valve (indicated by sudden rise
of suction pressure) before suction pressure reaches
5 psig (34 kPa). If this occurs, shut off unit imme-
diately, then frontseat the suction valve and remove
and reclaim excess refrigerant following accepted
practice.
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 thermo-
stat below ambient temperature. Operate unit for 15 min-
utes, then check system refrigerant charge. See Refrigerant
Charging section on page 8.
3. Start unit and run until suction pressure reaches 5 psig
(34 kPa).
4. Shut unit off and frontseat suction valve.
Unit compressor starts after a 5-minute delay if equipped
with accessory Time Guard II device.
5. Depressurize low side of unit and recover refrigerant fol-
lowing accepted practice.
7
Table 3 — Electrical Data
OPERATIONAL
VOLTAGE*
COMPRESSOR
POWER SUPPLY
UNIT SIZE
38HDL
V-PH-Hz
Max Fuse† or HACR-Type
Min
Max
RLA
LRA
Fan FLA
MCA
Ckt Bkr Amps
018
024
030
036
048
060
10.7
13.2
15.7
14.2
24.3
28.6
47.0
59.0
.70
.70
14.1
17.2
20.3
18.5
31.8
37.2
25
30
35
30
50
65
73.0
.70
208/230-1-60
LEGEND
Full Load Amps
Heating, Air Conditioning, Refrigeration
Locked Rotor Amps
187
254
86.7
.70
131.0
170.0
1.45
1.45
2. All motors and compressors contain internal overload protection.
3. In compliance with NEC (U.S.A. Standard) requirements for mul-
timotor 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 RLA values are established in accordance with UL (Under-
writers’ Laboratories) Standard 465 (U.S.A. Standard).
FLA
HACR
LRA
MCA
NEC
RLA
—
—
—
—
—
—
Minimum Circuit Amps per NEC Section 430-24
National Electrical Code (U.S.A. Standard)
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.
7. Replace retainer O-ring before reassembling AccuRater
device (O-ring part no. 99CC501052).
Low Pressure Switch — This switch, mounted on the
suction line, has fixed non-adjustable settings. To check pres-
sure switch, attach pressure gage to suction service valve gage
port. Slowly close liquid shutoff valve and allow compres-
sor to pump down. Do not allow compressor to pump down
below 2 psig (14 kPa). Compressor should shut down when
suction pressure drops to cutout pressure in Tables 1A and
1B, and should restart when pressure builds up to cut-in pres-
sure shown after accessory CLO (compressor lockout) switch
has been reset and accessory Time Guard II device has com-
pleted its timing cycle.
Refrigerant Charging
To prevent personal injury, wear safety glasses and gloves
when handling refrigerant. Do not overcharge system
— this can cause compressor flooding.
NOTE: Do not vent or depressurize unit refrigerant to atmos-
phere. Remove and reclaim refrigerant following practice.
Service Valves — The service valves in the outdoor unit
come from the factory frontseated. This means the refrig-
erant 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 counter-
clockwise 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 out-
door and indoor unit. The service valve cannot be field re-
paired; only a complete valve or valve stem seal and service
port caps are available for replacement.
SUPERHEAT METHOD (COOLING, NON-TXV) — To
check and adjust charge during cooling season, use Tables
4A-5B 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. In-
sulate thermometer for accurate readings.
4. Measure outdoor coil inlet-air dry bulb temperature with
a second thermometer.
5. Measure indoor coil inlet-air wet bulb temperature with
a sling psychrometer.
6. Refer to Tables 4A and 4B. Find air temperature enter-
ing outdoor coil and wet-bulb temperature entering
indoor coil. At this intersection, note the superheat
temperature.
AccuRaterா (Bypass Type) Device — See Fig. 4
for bypass type AccuRater device components. The piston
has a refrigerant metering hole through it. The retainer forms
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.
7. Refer to Tables 5A and 5B. Find superheat temperature
and suction pressure and note suction line temperature.
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, care-
fully 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, seal-
ing surface around piston cones, and fluted portion of pis-
ton are not damaged.
8. If unit has higher suction line temperature than charted
temperature, add refrigerant until 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 tem-
perature indicated on chart.
6. Clean piston refrigerant metering hole.
NOTE: The above procedure is independent of indoor air
quantity.
8
SUBCOOLING METHOD (COOLING, TXV) — To check
and adjust charge during cooling season, use Tables 6A and
6B 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 Tables 6Aand 6B. Find temperature point at which
the required subcooling temperature intersects the mea-
sured liquid line pressure.
Table 5A — Required Suction-Tube Temperature (F)
— English (Entering Suction Service Valve)
SUCTION PRESSURE AT SERVICE PORT (psig)
61.5 64.2 67.1 70.0 73.0 76.0 79.2 82.4 85.7
35 36 39 41 43 45 47 49 51
37 39 41 43 45 47 49 51 53
39 41 43 45 47 49 51 53 55
41 43 45 47 49 51 53 55 57
43 45 47 49 51 53 55 57 59
45 47 49 51 53 55 57 59 61
47 49 51 53 55 57 59 61 63
49 51 53 55 57 59 61 63 65
51 53 55 57 59 61 63 65 67
53 55 57 59 61 63 65 67 69
55 57 59 61 63 65 67 69 71
57 59 61 63 65 67 69 71 73
59 61 63 65 67 69 71 73 75
61 63 65 67 69 71 73 75 77
63 65 67 69 71 73 75 77 79
65 67 69 71 73 75 77 79 81
67 69 71 73 75 77 79 81 83
69 71 73 75 77 79 81 83 85
71 73 75 77 79 81 83 85 87
73 75 77 79 81 83 85 87 89
75 77 79 81 83 85 87 89 91
SUPERHEAT
TEMP (F)
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
4. If the measured liquid line temperature does not agree
with the required liquid line temperature, ADD refriger-
ant to lower the temperature, or REMOVE refrigerant to
raise the temperature (allow a tolerance of ± 3 F).
Table 4A — Superheat Charging Table — English
(Superheat Entering Suction Service Valve)
INDOOR COIL ENTERING AIR (F) WB
OUTDOOR
TEMP (F)
50 52 54 56 58 60 62 64 66 68 70 72 74 76
55
60
9
7
*
*
*
*
*
*
*
*
*
*
*
12 14 17 20 23 26 29 32 35 37 40 42 45
10 12 15 18 21 24 27 30 33 35 38 40 43
6 10 13 16 19 21 24 27 30 33 36 38 41
65
70
*
*
*
*
*
*
*
*
*
*
7 10 13 16 19 21 24 27 30 33 36 39
9 12 15 18 21 24 28 31 34 37
8 12 15 18 21 25 28 31 35
8 11 15 19 22 26 30 33
75
*
*
*
*
*
*
*
*
*
6
Table 5B — Required Suction-Tube Temperature (C)
— SI (Entering Suction Service Valve)
80
*
5
85
*
*
*
*
*
*
*
*
*
90
*
*
*
*
*
*
*
*
*
*
*
*
5
9 13 16 20 24 27 31
6 10 14 18 22 25 29
SUCTION PRESSURE AT SERVICE PORT (kPa)
424 443 463 483 503 524 546 568 591
OUTDOOR
TEMP (C)
95
*
100
105
110
115
*
*
*
*
*
8 12 15 20 23 27
0
1
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
31
32
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
31
32
33
*
*
*
5
9 13 17 22 26
6 11 15 20 25
*
2
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
31
*
*
8 14 18 23
3
5
6
7
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
4
6
7
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
LEGEND
6
7
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
WB
—
Wet Bulb
7
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
*Do not attempt to charge system under these conditions or refrig-
erant slugging may occur.
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
9
11
12
13
14
15
16
17
18
19
21
22
23
24
Table 4B — Superheat Charging Table — SI
(Superheat Entering Suction Service Valve)
10
11
12
13
14
16
17
18
19
20
21
22
INDOOR COIL ENTERING AIR (C) WB
OUTDOOR
TEMP (C)
10 11 12 13 14 16 17 18 19 20 21 22 23 24
13
16
18
21
24
27
29
32
35
38
41
43
46
5
4
*
*
*
*
*
*
*
*
*
*
*
7
6
3
8
7
6
4
9 11 13 14 16 18 19 21 22 23 25
8 10 12 13 15 17 18 19 21 22 24
7
6
3
9 11 12 13 15 17 18 20 21 23
*
7
5
3
9 11 12 13 15 17 18 20 22
*
*
*
*
*
*
*
*
*
*
7
4
8 10 12 13 16 17 19 21
*
*
*
*
*
*
*
*
*
7
4
3
8 10 12 14 16 17 19
*
*
*
*
*
*
*
*
*
6
5
3
8 11 12 14 17 18
*
*
*
*
*
*
*
*
*
*
*
*
7
6
4
3
9 11 13 15 17
8 10 12 14 16
*
*
*
*
*
*
7
5
3
8 11 13 15
*
*
*
7
6
4
9 12 14
8 11 14
8 10 13
*
*
*
LEGEND
WB
—
Wet Bulb
*Do not attempt to charge system under these conditions or refrig-
erant slugging may occur.
9
COMPRESSOR — Compressor contains factory oil charges;
replace oil when lost. See Tables 1A and 1B for oil recharge
and refer to Carrier Standard Service Techniques Manual,
Chapter 1, pages 1 to 21 for oil recharging procedure. See
Table 7 for recommended compressor oils.
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.
Cleaning Coils — Coil should be washed out with wa-
ter or blown out with compressed air. Note that the blow-
thru design causes dirt and debris to build up on the inside
of the coils.
Clean coil annually or as required by location and outdoor
air conditions. Inspect coil monthly and clean as required.
Fins are NOT continuous through coil sections. Dirt and de-
bris may pass through the first section, become trapped be-
tween the rows of fins, and restrict condenser airflow. Use a
flashlight to determine if dirt or debris has collected between
coil sections. Clean coil as follows:
Lubrication
FAN-MOTOR BEARINGS — Oiling holes are provided at
each end of the condenser-fan motor. Remove fan motor and
lubricate motor with 32 drops (16 drops per hole) of SAE-10
(Society of Automotive Engineers) non-detergent oil at in-
tervals described below:
• Annually, when environment is very dirty, ambient tem-
perature is higher than 105 F (40 C), and average unit op-
erating time exceeds 15 hours a day, or
• Every three years, when environment is reasonably clean,
ambient temperature is less than 105 F (40 C), and unit
operating time averages 8 to 15 hours per day, or
• Every 5 years when environment is clean, ambient tem-
perature is less than 105 F (40 C), and unit operating time
averages less than 8 hours per day.
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 6A — Required Liquid Line Temperature (F) — English (At Service Valve)
LIQUID PRESSURE AT SERVICE VALVE (PSIG)
REQUIRED
SUBCOOLING (F)
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
5
76
71
66
61
56
51
79
74
69
64
59
54
82
77
72
67
62
57
85
80
75
70
65
60
88
83
78
73
68
63
91
86
81
76
71
66
94
89
84
79
74
69
97
92
87
82
77
72
100 103 106 109
112
115
110
118
113
121 124 127 130 133 136 139 142 145
95
90
85
80
75
98 101 104 107
116
111
119
117
122 125 128 131 134 137 140
120 123 126 129 129 132 135
10
15
20
25
93
88
83
78
96
91
86
81
99 102 105 108
94
89
84
97 100 103 106 109
112
98 101 104 107
93 96
115
110
118
113
121 124 127 130
92
87
95
90
116
111
119
114
122 125
117 120
99 102 105 108
Table 6B — Required Liquid Line Temperature (C) — SI (At Service Valve)
LIQUID PRESSURE AT SERVICE VALVE (PSIG)
REQUIRED
SUBCOOLING (C)
911 969 1030 1061 1121 1186 1219 1286 1360 1397 1471 1547 1588 1671 1755 1800 1885 1976 2026 2125 2222 2264 2379 2475
0
2
24
22
20
18
16
14
12
10
26
24
22
20
18
16
14
12
28
26
24
22
20
18
16
14
29
27
25
23
21
19
17
15
31
29
27
25
23
21
19
17
33
31
29
27
25
23
21
19
34
32
30
28
26
24
22
20
36
34
32
30
28
26
24
22
38
36
34
32
30
28
26
24
39
37
35
33
31
29
27
25
41
39
37
35
33
31
29
27
43
41
39
37
35
33
31
29
44
42
40
38
36
34
32
30
46
44
42
40
38
36
34
32
48
46
44
42
40
38
36
34
49
47
45
43
41
39
37
35
51
49
47
45
43
41
39
37
53
51
49
47
45
43
41
39
54
52
50
48
46
44
42
40
56
54
52
50
48
46
44
42
58
56
54
52
50
48
46
44
59
57
55
53
51
49
47
45
61
59
57
55
53
51
49
47
63
61
59
57
55
53
51
49
4
6
8
10
12
14
Table 7 — Recommended Compressor Oils
UNIT 38HDL
RECOMMENDED
OIL
018
024
030
036
048
060
3GS
Calumet RO-15
Sontex 200LT
•
•
•
•
•
•
•
10
TROUBLESHOOTING CHART — COOLING CYCLE
Copyright 1998 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
PC 111
Catalog No. 563-899
Printed in U.S.A.
Form 38HDL-1SI
Pg 12
9-98
Replaces: New
Tab 3a 2a
|