Carrier 38YCB Operation manual

Copyright 1996 Carrier Corporation Form 38YCB-C2PD
Product
Data
38YCB 50 Hz
Heat Pump
38YCB Sizes 024 thru 060

®
The 38YCB 50 Hertz Outdoor
Sections of Split-System Heat Pumps
aredesignedforquiet, reliableheating
during the winter and cooling during
the summer. With a SEER up to 10.0
and COP up to 3.0, these heat pump
systems provide economy of
operation through energy
conservation when used with
components designated by
manufacturer. They recover heat for
indoor comfort from outdoor air
during the heating season and, by
automatically reversing the
refrigerant system, remove indoor
heat and excess humidity during the
cooling season.
FEATURES/BENEFITS
ElectricalRange — Unitsareoffered
in single phase 220–240v. Three-
phase units are available in sizes 036,
048, and 060 in 400v.
Size Range — The 38YCB is
available in nominal sizes 024, 036,
048 and 060 to meet the needs of
residential and light commercial
applications.
Compressor — Designed
specifically for heat pump duty, with
energy efficiency during heating and
coolingoperation. Eachcompressoris
hermetically sealed against
contamination to assure long life and
dependable performance, internally
sprung (units with reciprocating
compressor) and externally mounted
onrubberisolatorsforquietoperation.
Continuous compressor operation is
approved down to –30
° F (–34.4 ° C)
in the heating mode, and down to
55
° F (12.8 ° C) in the cooling mode.

2
(See heating and cooling performance
tables.) For compressor usage, see
Compressor data table.
Built-in-Reliability
Components
— Includes a suction-
tube accumulator that reduces the
amount of liquid refrigerant that
reaches the compressor; low-pressure
switch to stop the compressor if
refrigerant charge is lost; crankcase
heater on units with reciprocating
compressor and all 3-phase units to
keep compressor oil warm and free of
refrigerant for maximum lubricity;
internal compressor relief valve for
high-pressure protection.
DischargeSilencer — Minimizes low
frequency sound and pressure
pulsation generated by compressor
discharge gas.
Defrost Control Board —
Incorporates a defrost relay, defrost
timer, and low-voltage terminations.
The defrost control is a time and
temperature initiation/termination
control which includes 3 field-
selectable time periods of 30, 50, and
90 minutes. The control includes built-
in 5-minute compressor delay for units
equipped with scroll compressors (see
Compressor data table).
Weather-ProtectiveCabinet —Steel
is protected with a heavy coating
commonly called “galvanizing,” and
treated with a layer of zinc phosphate.
A coat of modified polyester powder
coating is then applied and baked-on,
providing each unit with a hard,
smooth finish that will last for many
years.
All screws on cabinet exterior are
coated for a long-lasting rust-resistant,
quality appearance.
Unit Design — All units are equipped
with totally enclosed fan motors for
greater reliability under rain and snow
conditions. The large, wraparound coil
uses copper tube and enhanced
aluminum fin and is designed for
optimum heat transfer during heating
and cooling. The vertical air discharge
carries the sound and air up and away
from adjacent patio areas and foliage.
Coils can be cleaned with a common
garden hose.
External Service Valves — Both
service valves are brass, front seating
type. Valves are externally located
so refrigerant tube connections can
be made quickly and easily. Each
valve has a service port for ease of
checking operating refrigerant
pressures. The 38YCB has sweat
field connections.
Safety — All units are designed and
manufactured in accordance with
UnderwritersLaboratories(U.L.1995)
standard for safety, heating and
cooling equipment.
Model number nomenclature
38YCB 036
Electric Heat Pump
Nominal Capacity
024 — 24,000 Btuh (7.0 Kw) 048 — 48,000 Btuh (14.1 Kw)
036 — 36,000 Btuh (10.6 Kw) 060 — 60,000 Btuh (17.6 Kw)
901
Packaging
Series
Electrical
7 — 240-1-50
9 — 400-3-50
Quality Assurance

3
Physical data
* Tube sizes are for lengths up to 50 ft (15.24m). For lengths over 50 ft (15.24m), consult Long-Line Application Guideline.
NOTE: See unit Installation Instructions for proper installation.
METERING DEVICE
*Piston listed is for any approved coil combination.
UNIT SIZE 024 036 048 060
SERIES
70 70, 90 70, 90, 92 90, 92
OPERATING WT (Lb/Kg) 145 / 65.9 222 / 100.9 225 / 102 261 / 118.6
COMPRESSOR
Manufacturer & Type
Copeland & Recip Copeland & Recip Millennium & Scroll Millennium &Scroll
REFRIGERANT
Control
Charge (Lb/Kg) @ 15 ft
22
Piston
4.04 / 2.2 7.9 / 3.8 5.3 / 2.4 / 7.25 10.9 / 4.9 / 10.75
CONDENSER FAN
Air Discharge
Air Qty (CFM L/S)
Motor RPM (50 Hz)
Propeller Type, Direct Drive
Vertical
2600 / 1214 3300 / 1541
900
CONDENSER COIL
Face Area (Sq ft/m
2
) 12.42 / 1.15 22.40 / 2.08 18.67 / 1.73
CONNECTION (In./mm ID)
Vapor
Liquid
Sweat
5/8 / 15.875 3/4 / 19.05 7/8 / 22.225
3/8 / 9.525
REFRIGERANT TUBES*
(In./mm OD)
Vapor
Liquid
5/8 / 15.875 3/4 / 19.05 1-1/8 / 28.575
3/8 / 9.525
UNIT
SIZE OUTDOOR PISTON INDOOR PISTON*
024-70 49 63
036-70, 90 61 73
048-70, 90 73 88
048-92 73 90
060-90 76 98
060-92 76 96

4
Accessories
* Isolation relay required.
† Consult low-ambient controller Installation Instructions for application.
‡ Hard shutoff TXV requires compressor start assist on reciprocating compressors.
N/A — Not applicable in this application.
ORDERING NUMBER DESCRIPTION
KAAWS0101AAA
Winter Start Control — All Sizes
KAATD0101TDR Time-Delay Relay — All Sizes
KAAFT0101AAA Evaporator Freeze Thermostat† — All Sizes
KHAIR0101AAA Isolation Relay† — All Sizes
KSACY0101AAA Cycle Protector — Sizes 024, 036
Standard Cycle Protector — Sizes 036 (71), 048, 060
N/A Compressor Start Assist (Capacitor/Relay) — Sizes 036 (90), 048 (90), 060 (90)
KAAHS0601AAA Compressor Start Assist (Capacitor/Relay) — Size 024
KAAHS0401AAA Compressor Start Assist (Capacitor/Relay) — Sizes 036 (70), 048 (70)
KAACS0201PTC Start Assist (PTC) — Sizes 036, 048 (70)
Standard Start Assist (PTC) — Size 024
N/A Start Assist (PTC) — Sizes 036, 048 (90), and 060 (90)
Standard Crankcase Heater — All Sizes
KSASH1101COP Sound Blanket — Size 024
KSASH2001CYL Sound Blanket — Sizes 036 (70, 90); 048; 060
KHAOT0301FST Outdoor Thermostat — All Sizes
KHAOT0201SEC Secondary Outdoor Thermostat — All Sizes
KHATX1001HSO‡ TXV (Hard Shutoff) — Size 024
KHATX1201HSO‡ TXV (Hard Shutoff) — Sizes 036
KHATX1301HSO TXV (Hard Shutoff) — Size 048
KHATX1401HSO TXV (Hard Shutoff) — Size 060
KHATX0301RPB TXV (RPB) — Size 024
KHATX0501RPB TXV (RPB) — Sizes 036
KHATX0601RPB TXV (RPB) — Size 048
KHATX0701RPB TXV (RPB) — Size 060
Standard Low-Pressure Switch — All Sizes
KSAHI0201HPS High-Pressure Switch — All Sizes
KHALS0101LLS Liquid Solenoid Valve (LSV) — All Sizes
P251-0083 Low-Ambient Controller* (RCD) — All Sizes
P504-8083S Filter Drier — Bi-flow Sizes 024, 036
P504-8163S Filter Drier — Bi-flow Sizes 048, 060
32LT660004 MotorMaster® Control — All Sizes
THERMOSTAT DESCRIPTION
TSTATCCNHP01-A
Thermostat, Auto Changeover, Non-Programmable, ° F/ ° C, 2-Stage Heat, 1-Stage Cool
TSTATCCPHP01-A Thermostat, Auto Changeover, 7-Day Programmable, ° F/ ° C, 2-Stage Heat, 1-Stage Cool
--HH--07AT-215 Thermostat, Manual Changeover, Non-Programmable, ° F, 2-Stage Heat, 1-Stage Cool
TSTATCCSEN01 Outdoor Sensor

5
Accessory Description and Usage
1. Compressor Start Assist-Capacitor/Relay Type
Start capacitor and start relay gives “hard” boost to compressor motor at each start-up.
SUGGESTED USE: Installations where interconnecting tube length exceeds 50 ft (15.24m).
Installations where outdoor design temperature exceeds 105 ° F (40.6 ° C).
Replacement installations with hard shutoff expansion valve or liquid line solenoid on indoor coil.
Units installed with low-ambient controller.
2. Evaporator Freeze Thermostat
A SPST temperature actuated switch which stops unit operation when evaporator reaches freeze-up conditions.
SUGGESTED USE: All units where low-ambient controller has been added.
3. Filter Drier—Bi-flow
A device for removing contaminants from refrigerant circulating in an air conditioner or heat pump system; bi-flow for heat pumps.
SUGGESTED USE: All field-connected split-system units.
4. High-Pressure Switch
Auto reset SPST switch activated by refrigerant pressure on high side of refrigerant circuit. Cycles compressor off if refrigerant pressure rises to about 425 psig.
Provides additional protection against compressor damage due to loss of outdoor airflow.
SUGGESTED USE: Installations exposed to very “dirty” outdoor air.
Installations where condenser inlet air temperature exceeds 125 ° F (51.7 ° C).
5. Interface Control (Optimizer II)
An electric control for controlling a heat pump and gas or oil furnace system for maximum energy savings. It allows heat pump to operate down to a predeter-
mined economic balance point temperature, then switches to allow furnace operation only below that temperature. Requires outdoor thermostat to be adjusted
for economic balance point temperature.
SUGGESTED USE: All heat pump and gas- or oil-fired furnace combination systems.
6. Isolation Relay
A SPDT relay which switches the low-ambient controller out of the outdoor fan motor circuit when the heat pump switches to heating mode.
SUGGESTED USE: All heat pumps where low-ambient controller has been added.
7. Liquid Solenoid Valve (LSV)
An electrically operated shutoff valve to be installed at the outdoor unit and which stops and starts refrigerant liquid flow in response to compressor operation.
Maintains a column of refrigerant liquid ready for action at next compressor operation cycle.
Note: Compressor start assist–capacitor/relay type (Item 1) must be used on single-phase reciprocating compressors.
SUGGESTED USE: In certain long-line applications. (Refer to Long-Line Application Guideline.)
8. Outdoor Thermostat
A SPDT temperature actuated switch which turns on supplemental electric heaters when outdoor air temperature drops below set point.
SUGGESTED USE: Heat pump installations with multiple-stage supplemental heaters
9. Secondary Outdoor Thermostat
A SPDT temperature actuated switch which turns on a third stage of supplemental electric heaters when outdoor air temperature drops below the second-stage
set point.
SUGGESTED USE: Heat pump installations where 3-stage operation of supplemental heaters is desired.
10. Sound Blanket
Wraparound sound attenuation cover for the compressor. Reduces the sound level by about 2 dBA.
SUGGESTED USE: Unit installed closer than 15 ft (4.55m) to quiet areas—bedrooms, etc.
Unit installed between 2 houses less than 10 ft (3.04m) apart.
11. Thermostatic Expansion Valve (TXV)
A modulating flow-control valve which meters refrigerant liquid flow rate into the evaporator in response to the superheat of the refrigerant gas leaving the
evaporator. Kit includes valve, adapter tubes, and external equalizer tube. Both hard shutoff and RPB valves are available.
SUGGESTED USE: For improved system performance in cooling mode.
12. Time-Delay Relay
A SPST delay relay which briefly continues operation of the indoor blower motor to provide additional cooling after the compressor cycles off.
SUGGESTED USE: For improved efficiency ratings for certain combinations of indoor and outdoor units. (Refer to ARI Unitary Directory.)

6
Electrical data
* Permissible limits of the voltage range at which unit will operate satisfactorily. Operation outside these limits may result in unit failure.
† Time-delay fuse.
‡ Length shown is as measured 1 way along the wire path between the unit and the service panel for voltage drop not to exceed 2%.
** If wire is applied at ambient greater than 30 ° C (86 ° F), consult Table 310-16 of the NEC (ANSI/NFPA 70). The ampacity of nonmetallic-sheathed-
cable (NM), trade name ROMEX, shall be that of 60 ° C (140 ° F) conductors, per the NEC (ANSI/NFPA 70) Article 336-36.
If other than uncoated (non-plated), 60 ° or 75 ° C (140 ° or 167 ° F) insulation, copper wire (solid wire for 10 AWG and smaller, stranded wire for
larger than 10 AWG) is used, consult applicable tables of the NEC (ANSI/NFPA 70).
FLA — Full Load Amps
HACR — Heating, Air Conditioning, Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
RLA — Rated Load Amps
NOTE: Control circuit is 24v on all units and requires external power source. Copper wire must be used from disconnect to unit. All motors/compres-
sors contain internal overload protection.
Performance summary*
* Ratings are net values reflecting the effects of circulating fan heat.Supplemental electric heat is not included. Ratings are based on:
Cooling Standard: 80 ° F (27 ° C) db 67 ° F (19 ° C) wb indoor entering air temperature and 95 ° F (35 °C) db air entering outdoor unit.
High-Temperature Heating Standard:70°F (21°C) db indoor entering air temperature and 47°F (8°C) db 43°F (6°C) wb air entering outdoor unit.
Low-Temperature Heating Standard:70°F (21°C) db indoor entering air temperature and 17°F (–8°C) db 15°F (11°C) wb air entering outdoor unit.
† Outdoor section/indoor section combination tested in accordance with DOE test procedures for heat pumps. Ratings for other combinations are
determined under DOE computer simulation procedures.
Sound power
OUTDOOR
UNIT V/PH OPER VOLTS* COMPRESSOR FAN
FLA MCA
MIN WIRE
SIZE**
60°C/75°C
MAX
LENGTH
(Ft)‡
60°C/75°C
MAX
LENGTH
(m)‡
60°C/75°C
MAX FUSE†
OR HACR
TYPE CKT
BKR AMPSMax Min LRA RLA
024-70 230-1 253 207 68.0 11.5 1.4 15.8 14/14 55/39 16.7/11.9 25
036-70 94.0 16.5 1.4 22.2 12/12 65/47 19.8/14.3 30
048-70 140.0 19.2 1.6 25.6 10/10 96/70 29.3/21.3 40
036-90
400-3 440 360
42.0 6.4 0.7 8.7 14/14 260/247 79.2/75.3 15
048-90 66.5 8.0 0.7 10.7 14/14 165/157 50.3/47.9 15
048-92 63.0 7.95 0.7 10.7 14/14 165/157 50.3/47.9 15
060-90 73.0 9.5 0.7 12.6 14/14 165/157 50.3/47.9 20
060-92 74.0 8.97 0.7 11.9 14/14 165/157 50.3/47.9 20
UNIT SIZE-
SERIES INDOOR MODEL
NOMINAL
AIRFLOW COOLING CAP @ 95°F (35°C) HEATING CAPACITY
HiTemp 47°F (8°C) LoTemp 17°F (–3°C)
Rated Capacity Power
KW Rated EER Rated Capacity Power
KW Rated Capacity Power
KWCFM L/S BTUH KW BTUH KW BTUH KW
024-70 F(A,B)4ASF024† 800 380 23,000 6.7 2.72 9.00 23,000 6.7 2.40 14,000 4.1 1.72
F(A,B)4ASF030 800 380 23,600 6.9 2.73 9.00 23,000 6.7 2.38 14,000 4.1 1.70
FG3ASA024 800 380 22,000 6.4 2.77 8.50 23,000 6.7 2.51 13,829 4.1 1.80
036-70, 90 F(A,B)4ASF036† 1200 550 35,000 10.3 3.85 9.00 36,000 10.5 3.40 22,100 6.5 2.65
F(A,B)4AS(F,B)042 1200 550 35,500 10.4 3.80 9.20 37,000 10.8 3.30 22,145 6.5 2.57
FG3ASA036 1200 550 34,000 10.0 3.83 8.80 36,000 10.5 3.43 21,949 6.4 2.67
048-70, 90,
92
F(A,B)4AS(F,B)048† 1600 750 46,500 13.6 4.98 9.00 47,000 13.8 4.27 28,000 8.2 3.71
F(A,B)4AS(F,B)060 1600 750 47,500 13.9 5.03 9.00 47,000 13.8 4.16 28,004 8.2 3.61
FG3ASA048 1600 750 45,500 13.3 4.97 8.50 47,000 13.8 4.39 27,909 8.2 3.81
FG3ASA060 1600 750 46,500 13.6 5.01 8.50 47,000 13.8 4.35 28,010 8.2 3.78
060-90, 92 F(A,B)4AS(F,B)060† 1900 900 57,000 16.7 6.05 9.00 59,000 17.3 5.20 39,000 11.4 4.44
FB4ASB070 1900 900 58,000 17.0 6.15 9.00 59,000 17.3 5.01 39,150 11.5 4.28
FG3ASA060 1900 900 56,500 16.6 6.02 9.00 57,500 16.8 5.37 38,793 11.4 4.58
UNIT
SIZE
SOUND
RATING
(dBA) OCTAVE BAND CENTER FREQUENCY (Hz) 125 250 500 1000 2000 4000 8000
024
036
048
060
78
78
78
78
42.4
43.4
58.5
55.5
52.9
52.9
64.0
63.5
63.3
61.3
68.5
67.0
64.0
72.5
70.0
67.5
72.2
63.2
69.0
65.5
60.5
62.5
63.5
62.5
59.4
59.9
56.0
57.5

7
Detailed cooling capacities* (S.I.)
See notes on pg. 8.
COIL
AIR CONDENSER ENTERING AIRTEMPERATURES °C 28 32 36 40 44 48 52
L/S (C) EWB
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡
38YCB024-70 Outdoor SectionWith F(A,B)4ASF024 Indoor Section
340
22 7.83 3.94 2.56 7.50 3.81 2.68 7.17 3.69 2.80 6.84 3.57 2.91 6.50 3.44 3.02 6.16 3.32 3.13 5.81 3.20 3.23
20 7.32 4.64 2.49 7.01 4.51 2.61 6.70 4.39 2.72 6.38 4.26 2.83 6.06 4.14 2.93 5.73 4.01 3.03 5.40 3.88 3.13
18 6.84 5.33 2.43 6.55 5.20 2.54 6.25 5.06 2.65 5.96 4.93 2.75 5.66 4.79 2.85 5.36 4.64 2.95 5.05 4.48 3.05
16 6.46 5.89 2.38 6.19 5.74 2.49 5.93 5.58 2.59 5.66 5.42 2.70 5.39 5.25 2.80 5.12 5.06 2.90 4.84 4.84 2.99
14 6.25 6.22 2.35 6.03 6.00 2.46 5.80 5.79 2.57 5.57 5.56 2.68 5.34 5.33 2.79 5.09 5.09 2.89 4.84 4.84 2.99
380
22 7.96 4.09 2.61 7.62 3.96 2.73 7.28 3.84 2.85 6.93 3.71 2.96 6.58 3.59 3.07 6.23 3.47 3.18 5.88 3.35 3.28
20 7.45 4.86 2.54 7.12 4.74 2.66 6.80 4.61 2.77 6.47 4.48 2.88 6.14 4.35 2.99 5.80 4.23 3.09 5.47 4.10 3.18
18 6.97 5.62 2.48 6.67 5.48 2.59 6.36 5.34 2.70 6.06 5.20 2.81 5.76 5.04 2.91 5.46 4.86 3.01 5.17 4.67 3.11
16 6.61 6.20 2.43 6.34 6.03 2.54 6.06 5.87 2.65 5.79 5.69 2.76 5.52 5.49 2.86 5.26 5.26 2.96 5.00 5.00 3.07
14 6.47 6.45 2.41 6.23 6.22 2.53 6.00 5.99 2.64 5.76 5.75 2.75 5.51 5.51 2.86 5.26 5.26 2.96 5.00 5.00 3.07
420
22 8.06 4.23 2.66 7.72 4.11 2.78 7.37 3.98 2.89 7.01 3.86 3.01 6.65 3.73 3.12 6.29 3.61 3.23 5.93 3.49 3.33
20 7.55 5.08 2.59 7.22 4.95 2.70 6.88 4.82 2.82 6.54 4.70 2.93 6.21 4.57 3.03 5.87 4.44 3.13 5.52 4.31 3.23
18 7.08 5.89 2.53 6.77 5.75 2.64 6.46 5.60 2.75 6.16 5.43 2.86 5.86 5.24 2.96 5.56 5.05 3.07 5.26 4.84 3.17
16 6.74 6.48 2.48 6.46 6.30 2.59 6.18 6.11 2.70 5.91 5.90 2.81 5.65 5.65 2.92 5.39 5.39 3.03 5.12 5.12 3.13
14 6.65 6.64 2.47 6.41 6.40 2.59 6.16 6.15 2.70 5.91 5.91 2.81 5.65 5.65 2.92 5.39 5.39 3.03 5.13 5.13 3.13
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4ASF 024 1.00 1.00 FG3ASA 024 0.97 1.02
030 1.02 1.00 — — —
38YCB036-70, 90 Outdoor SectionWith F(A,B)4ASF036 Indoor Section
500
22 11.9 6.04 3.60 11.4 5.86 3.77 10.9 5.68 3.94 10.4 5.50 4.11 9.92 5.32 4.27 9.42 5.14 4.42 8.90 4.96 4.58
20 11.1 7.14 3.51 10.6 6.95 3.67 10.2 6.77 3.83 9.69 6.58 3.99 9.21 6.40 4.14 8.73 6.21 4.29 8.25 6.03 4.43
18 10.3 8.21 3.42 9.91 8.01 3.58 9.48 7.81 3.74 9.04 7.61 3.89 8.60 7.40 4.04 8.17 7.16 4.18 7.73 6.90 4.32
16 9.78 9.05 3.36 9.39 8.82 3.51 8.99 8.58 3.67 8.60 8.34 3.82 8.21 8.07 3.96 7.82 7.77 4.11 7.43 7.43 4.26
14 9.51 9.47 3.32 9.18 9.15 3.48 8.85 8.83 3.64 8.51 8.49 3.80 8.16 8.15 3.95 7.80 7.80 4.11 7.43 7.43 4.26
5.60
22 12.1 6.29 3.68 11.6 6.11 3.85 11.1 5.93 4.02 10.6 5.75 4.18 10.1 5.56 4.35 9.53 5.38 4.50 8.99 5.20 4.65
20 11.3 7.51 3.58 10.8 7.32 3.75 10.3 7.13 3.91 9.83 6.94 4.07 9.33 6.75 4.22 8.84 6.56 4.37 8.34 6.37 4.51
18 10.5 8.67 3.49 10.1 8.47 3.65 9.65 8.25 3.81 9.21 8.03 3.97 8.77 7.77 4.12 8.33 7.49 4.27 7.90 7.20 4.42
16 10.0 9.53 3.43 9.61 9.28 3.59 9.21 9.02 3.75 8.81 8.74 3.90 8.43 8.40 4.06 8.04 8.04 4.21 7.66 7.66 4.36
14 9.84 9.82 3.41 9.49 9.47 3.58 9.14 9.13 3.74 8.78 8.77 3.90 8.42 8.41 4.06 8.04 8.04 4.21 7.66 7.66 4.36
640
22 12.3 6.61 3.77 11.8 6.43 3.94 11.3 6.24 4.11 10.7 6.06 4.28 10.2 5.87 4.44 9.65 5.69 4.60 9.10 5.50 4.75
20 11.5 7.98 3.67 11.0 7.78 3.84 10.5 7.59 4.00 9.98 7.40 4.16 9.47 7.20 4.32 8.96 7.01 4.47 8.45 6.81 4.61
18 10.8 9.24 3.59 10.3 9.00 3.75 9.85 8.75 3.91 9.41 8.46 4.07 8.98 8.16 4.23 8.53 7.86 4.38 8.08 7.56 4.53
16 10.3 10.1 3.53 9.87 9.79 3.69 9.47 9.47 3.86 9.09 9.09 4.02 8.70 8.70 4.18 8.31 8.31 4.34 7.91 7.91 4.49
14 10.2 10.2 3.52 9.84 9.84 3.69 9.47 9.47 3.86 9.09 9.09 4.02 8.70 8.70 4.18 8.31 8.31 4.34 7.92 7.92 4.49
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4ASF 036 1.00 1.00 FG3ASA 036 0.98 1.00
F(A,B)4AS(F,B) 042 1.02 0.99 — — —

8
Detailed cooling capacities* (S.I.) continued
* Detailed cooling capacities are based on indoor and outdoor unit at the same elevation and connected by 4.55m of tubing. If other than 4.55m of
tubing is used and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.
† Total and sensible capacities are net capacities. Blower motor heat has been subtracted.
‡ Sensible capacities shown are based on 27°C entering air at the indoor coil. For sensible capacities at other than 27°C, deduct 245 kw per 480
L/S of indoor coil air for each degree below 27°C, or add 245 kw per 480 L/S of indoor coil air per degree above 27°C.
** System kw is total of indoor and outdoor unit kilowatt’s.
EWB— Entering Wet Bulb
L/S — Liters per second
COIL
AIR CONDENSER ENTERING AIRTEMPERATURES °C 28 32 36 40 44 48 52
L/S (C) EWB
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Capacity
Kw† Sys.
Power
Kw**
Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡
38YCB048-70, 90, 92 Outdoor SectionWith F(A,B)4AS(F,B)048 Indoor Section
650
22 15.4 7.87 4.50 14.9 7.69 4.79 14.4 7.51 5.09 13.9 7.32 5.41 13.3 7.13 5.75 12.8 6.94 6.11 12.3 6.75 6.48
20 14.5 9.38 4.41 14.0 9.19 4.69 13.5 9.00 4.98 13.0 8.81 5.29 12.5 8.62 5.63 12.0 8.42 5.97 11.5 8.23 6.33
18 13.6 10.8 4.32 13.2 10.7 4.59 12.7 10.5 4.88 12.3 10.3 5.18 11.8 10.1 5.51 11.3 9.82 5.84 10.8 9.56 6.19
16 12.9 12.0 4.25 12.5 11.8 4.52 12.1 11.5 4.80 11.7 11.3 5.11 11.3 11.0 5.43 10.9 10.7 5.75 10.4 10.4 6.09
14 12.6 12.6 4.21 12.3 12.3 4.49 12.0 11.9 4.78 11.6 11.6 5.09 11.2 11.2 5.41 10.8 10.8 5.75 10.4 10.4 6.09
750
22 15.6 8.26 4.60 15.1 8.08 4.89 14.6 7.89 5.19 14.1 7.71 5.51 13.5 7.51 5.86 13.0 7.32 6.22 12.4 7.13 6.59
20 14.7 9.96 4.51 14.2 9.78 4.79 13.7 9.59 5.08 13.2 9.39 5.39 12.7 9.19 5.73 12.2 9.00 6.08 11.7 8.80 6.44
18 13.9 11.6 4.42 13.4 11.4 4.69 13.0 11.2 4.98 12.5 10.9 5.29 12.0 10.7 5.62 11.6 10.4 5.97 11.1 10.1 6.32
16 13.3 12.8 4.35 12.9 12.5 4.63 12.5 12.2 4.92 12.0 12.0 5.22 11.6 11.6 5.56 11.2 11.2 5.90 10.8 10.8 6.25
14 13.1 13.1 4.34 12.8 12.7 4.62 12.4 12.4 4.91 12.0 12.0 5.22 11.6 11.6 5.56 11.2 11.2 5.90 10.8 10.8 6.25
850
22 15.8 8.64 4.70 15.3 8.45 4.99 14.8 8.27 5.29 14.2 8.08 5.61 13.7 7.89 5.95 13.1 7.69 6.31 12.5 7.50 6.69
20 14.9 10.5 4.60 14.4 10.3 4.88 13.9 10.2 5.18 13.4 9.96 5.49 12.9 9.75 5.83 12.3 9.55 6.18 11.8 9.35 6.54
18 14.1 12.3 4.51 13.6 12.0 4.79 13.2 11.8 5.08 12.7 11.5 5.40 12.3 11.1 5.74 11.8 10.8 6.09 11.3 10.5 6.45
16 13.6 13.4 4.45 13.2 13.1 4.73 12.8 12.8 5.03 12.4 12.4 5.34 11.9 11.9 5.68 11.5 11.5 6.04 11.1 11.1 6.40
14 13.5 13.5 4.45 13.1 13.1 4.73 12.8 12.8 5.03 12.4 12.4 5.34 11.9 11.9 5.68 11.5 11.5 6.04 11.1 11.1 6.40
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4AS(F,B) 048 1.00 1.00 FG3ASA 048 0.98 1.00
060 1.03 1.01 060 1.00 1.01
38YCB060-90, 92 Outdoor SectionWith F(A,B)4AS(F,B)060 Indoor Section
850
22 19.1 9.97 5.49 18.5 9.74 5.88 17.9 9.52 6.30 17.2 9.28 6.76 16.5 9.05 7.25 15.8 8.80 7.78 15.1 8.55 8.33
20 18.0 12.0 5.35 17.4 11.7 5.73 16.8 11.5 6.15 16.2 11.3 6.60 15.5 11.0 7.09 14.9 10.8 7.60 14.2 10.5 8.15
18 16.9 13.9 5.22 16.4 13.7 5.60 15.8 13.4 6.02 15.2 13.2 6.46 14.7 12.9 6.95 14.1 12.5 7.47 13.5 12.1 8.01
16 16.1 15.4 5.13 15.6 15.1 5.51 15.2 14.8 5.93 14.6 14.4 6.37 14.1 14.0 6.86 13.6 13.6 7.38 13.0 13.0 7.93
14 15.9 15.9 5.10 15.5 15.4 5.49 15.0 15.0 5.91 14.6 14.6 6.36 14.1 14.1 6.86 13.6 13.6 7.38 13.1 13.1 7.93
900
22 19.2 10.2 5.55 18.6 9.94 5.94 17.9 9.71 6.36 17.3 9.48 6.82 16.6 9.25 7.31 15.9 9.00 7.84 15.2 8.76 8.39
20 18.1 12.3 5.41 17.5 12.0 5.79 16.9 11.8 6.21 16.2 11.6 6.66 15.6 11.3 7.15 14.9 11.1 7.66 14.3 10.8 8.21
18 17.0 14.3 5.28 16.5 14.1 5.66 15.9 13.8 6.08 15.4 13.5 6.52 14.8 13.1 7.01 14.2 12.8 7.53 13.6 12.3 8.08
16 16.3 15.8 5.19 15.8 15.5 5.58 15.3 15.1 5.99 14.8 14.7 6.44 14.3 14.3 6.93 13.8 13.8 7.46 13.2 13.2 8.01
14 16.1 16.1 5.17 15.7 15.7 5.56 15.2 15.2 5.98 14.8 14.8 6.44 14.3 14.3 6.94 13.8 13.8 7.46 13.2 13.2 8.01
950
22 19.3 10.4 5.61 18.7 10.1 6.00 18.1 9.92 6.42 17.4 9.68 6.88 16.7 9.45 7.37 16.0 9.20 7.90 15.2 8.95 8.45
20 18.2 12.6 5.46 17.6 12.3 5.85 17.0 12.1 6.26 16.3 11.9 6.71 15.7 11.6 7.20 15.0 11.4 7.72 14.3 11.1 8.26
18 17.1 14.7 5.33 16.6 14.4 5.72 16.0 14.1 6.13 15.5 13.8 6.58 14.9 13.4 7.08 14.3 13.0 7.60 13.7 12.6 8.15
16 16.5 16.1 5.25 16.0 15.8 5.64 15.5 15.4 6.06 15.0 15.0 6.51 14.5 14.5 7.01 13.9 13.9 7.53 13.4 13.4 8.09
14 16.3 16.3 5.24 15.9 15.9 5.63 15.4 15.4 6.05 15.0 15.0 6.51 14.5 14.5 7.01 13.9 13.9 7.53 13.4 13.4 8.09
1000
22 19.4 10.6 5.66 18.8 10.3 6.06 18.1 10.1 6.47 17.4 9.87 6.93 16.7 9.64 7.43 16.0 9.39 7.95 15.3 9.14 8.50
20 18.3 12.9 5.51 17.6 12.6 5.90 17.0 12.4 6.32 16.4 12.2 6.77 15.7 11.9 7.26 15.1 11.7 7.77 14.3 11.4 8.32
18 17.3 15.0 5.39 16.7 14.7 5.78 16.2 14.4 6.19 15.6 14.0 6.65 15.0 13.6 7.14 14.4 13.2 7.66 13.8 12.8 8.21
16 16.6 16.4 5.31 16.1 16.0 5.70 15.6 15.6 6.12 15.1 15.1 6.58 14.6 14.6 7.08 14.1 14.1 7.60 13.5 13.5 8.16
14 16.6 16.5 5.31 16.1 16.1 5.70 15.6 15.6 6.12 15.1 15.1 6.58 14.6 14.6 7.08 14.1 14.1 7.60 13.5 13.5 8.16
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4AS(F,B) 060 1.00 1.00 FG3ASA 060 0.99 1.00
FB4ASB 070 1.02 1.02 — — —

9
Detailed cooling capacities* (English)
See notes on pg. 10.
COIL
AIR CONDENSER ENTERING AIRTEMPERATURES °F 75 85 95 105 115 125
CFM (F) EWB
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡
38YCB024-70 Outdoor SectionWith F(A,B)4ASF024 Indoor Section
700 72 27.9 13.5 2.43 26.4 12.9 2.60 24.8 12.3 2.76 23.3 11.7 2.92 21.7 11.2 3.08 20.0 10.6 3.22
67 25.4 16.7 2.35 24.0 16.1 2.51 22.6 15.5 2.66 21.1 14.9 2.81 19.6 14.3 2.95 18.1 13.7 3.08
62 23.1 19.9 2.27 21.8 19.3 2.42 20.5 18.7 2.56 19.2 18.0 2.70 17.8 17.3 2.84 16.5 16.5 2.97
57 21.9 21.9 2.22 20.8 20.8 2.38 19.8 19.8 2.53 18.7 18.7 2.68 17.6 17.6 2.83 16.5 16.5 2.97
800 72 28.5 14.1 2.49 26.9 13.5 2.66 25.3 12.9 2.83 23.6 12.3 2.98 22.0 11.7 3.14 20.3 11.1 3.28
67 26.0 17.7 2.40 24.5 17.1 2.56 23.0 16.5 2.72 21.5 15.9 2.87 19.9 15.3 3.01 18.3 14.7 3.15
62 23.7 21.3 2.32 22.3 20.6 2.48 21.0 19.9 2.63 19.6 19.2 2.77 18.3 18.3 2.91 17.1 17.1 3.05
57 22.8 22.8 2.29 21.7 21.7 2.45 20.6 20.6 2.61 19.5 19.5 2.76 18.3 18.3 2.91 17.1 17.1 3.06
900 72 29.0 14.6 2.54 27.3 14.0 2.71 25.7 13.4 2.88 23.9 12.8 3.04 22.2 12.3 3.19 20.5 11.7 3.34
67 26.4 18.7 2.46 24.9 18.1 2.62 23.4 17.5 2.77 21.8 16.8 2.93 20.2 16.2 3.07 18.6 15.6 3.20
62 24.2 22.6 2.38 22.8 21.9 2.53 21.4 21.1 2.68 20.1 20.1 2.83 18.9 18.9 2.99 17.6 17.6 3.13
57 23.6 23.6 2.36 22.5 22.5 2.52 21.3 21.3 2.68 20.1 20.1 2.83 18.9 18.9 2.99 17.6 17.6 3.13
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4ASF 024 1.00 1.00 FG3ASA 024 0.97 1.02
030 1.02 1.00 — — —
38YCB036-70, 90 Outdoor SectionWith F(A,B)4ASF036 Indoor Section
1050 72 42.5 20.8 3.43 40.2 19.9 3.67 37.9 19.1 3.91 35.6 18.2 4.14 33.2 17.4 4.36 30.7 16.5 4.57
67 38.6 25.9 3.31 36.5 25.1 3.54 34.3 24.2 3.76 32.1 23.3 3.98 29.9 22.4 4.18 27.6 21.5 4.38
62 35.0 31.0 3.20 33.1 30.0 3.42 31.2 29.1 3.63 29.2 28.1 3.83 27.3 27.0 4.04 25.4 25.4 4.24
57 33.5 33.5 3.15 31.9 31.9 3.37 30.4 30.4 3.60 28.8 28.8 3.81 27.1 27.1 4.03 25.4 25.4 4.24
1200 72 43.4 21.7 3.52 41.1 20.9 3.76 38.6 20.0 4.00 36.2 19.1 4.23 33.7 18.3 4.45 31.1 17.4 4.67
67 39.4 27.6 3.39 37.2 26.7 3.62 35.0 25.8 3.85 32.6 24.9 4.07 30.3 23.9 4.27 28.0 23.0 4.47
62 35.9 33.1 3.28 33.9 32.1 3.51 31.9 31.0 3.72 30.0 29.8 3.93 28.1 28.1 4.15 26.3 26.3 4.36
57 34.9 34.9 3.25 33.2 33.2 3.48 31.6 31.6 3.71 29.9 29.9 3.93 28.1 28.1 4.15 26.3 26.3 4.36
1350 72 44.1 22.6 3.60 41.7 21.8 3.84 39.2 20.9 4.08 36.7 20.0 4.31 34.0 19.2 4.54 31.4 18.3 4.75
67 40.1 29.1 3.47 37.8 28.2 3.70 35.4 27.3 3.93 33.1 26.4 4.15 30.7 25.4 4.36 28.4 24.5 4.56
62 36.6 35.1 3.37 34.6 33.9 3.59 32.6 32.6 3.81 30.8 30.8 4.04 29.0 29.0 4.26 27.1 27.1 4.48
57 36.0 36.0 3.35 34.3 34.3 3.58 32.6 32.6 3.81 30.8 30.8 4.04 29.0 29.0 4.26 27.1 27.1 4.48
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4ASF 036 1.00 1.00 FG3ASA 036 0.98 1.00
F(A,B)4AS(F,B) 042 1.02 0.99 — — —

10
Detailed cooling capacities* (English) continued
* Detailed cooling capacities are based on indoor and outdoor unit at the same elevation and connected by 25 ft of tubing. If other than 25 ft of
tubing is used and/or indoor unit is located above outdoor unit, a slight variation in capacity may occur.
† Total and sensible capacities are net capacities. Blower motor heat has been subtracted.
‡ Sensible capacities shown are based on 80°F entering air at the indoor coil. For sensible capacities at other than 80°F, deduct 835 Btuh per 1000
CFM of indoor coil air for each degree below 80°F, or add 835 Btuh per 1000 CFM of indoor coil air per degree above 80°F.
** System kw is total of indoor and outdoor unit kilowatts.
EWB — Entering Wet Bulb
COIL
AIR CONDENSER ENTERING AIRTEMPERATURES °F 75 85 95 105 115 125
CFM (F) EWB
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Capacity
MBtuh† Sys.
Power
Kw**
Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡ Total Sens‡
38YCB048-70, 90, 92 Outdoor SectionWith F(A,B)4AS(F,B)048 Indoor Section
1400 72 54.5 27.0 4.24 52.3 26.2 4.62 49.9 25.3 5.04 47.5 24.4 5.48 44.9 23.5 5.96 42.4 22.7 6.48
67 50.1 34.3 4.12 48.0 33.4 4.49 45.8 32.5 4.88 43.6 31.6 5.31 41.2 30.7 5.78 38.8 29.8 6.27
62 46.0 41.3 4.00 44.1 40.4 4.36 42.1 39.4 4.75 40.1 38.4 5.17 38.0 37.3 5.61 35.7 35.7 6.08
57 44.4 44.4 3.96 42.8 42.8 4.32 41.2 41.2 4.71 39.5 39.5 5.15 37.8 37.8 5.60 35.8 35.8 6.08
1600 72 55.4 28.2 4.34 53.1 27.4 4.72 50.6 26.5 5.13 48.1 25.6 5.58 45.4 24.7 6.06 42.8 23.8 6.58
67 51.0 36.3 4.21 48.8 35.5 4.58 46.5 34.6 4.98 44.1 33.7 5.41 41.7 32.7 5.88 39.3 31.8 6.37
62 46.9 44.1 4.10 45.0 43.1 4.46 43.0 42.0 4.85 41.0 40.7 5.27 39.0 39.0 5.74 37.0 37.0 6.23
57 46.0 46.0 4.07 44.4 44.4 4.44 42.6 42.6 4.84 40.9 40.9 5.27 39.0 39.0 5.74 37.0 37.0 6.23
1800 72 56.1 29.4 4.43 53.7 28.5 4.81 51.2 27.6 5.22 48.6 26.8 5.67 45.9 25.8 6.15 43.1 24.9 6.67
67 51.6 38.4 4.30 49.4 37.5 4.67 47.1 36.6 5.07 44.6 35.6 5.50 42.1 34.7 5.97 39.7 33.7 6.47
62 47.8 46.6 4.19 45.8 45.4 4.55 43.9 43.9 4.95 41.9 41.9 5.39 40.0 40.0 5.86 38.0 38.0 6.37
57 47.4 47.4 4.18 45.7 45.7 4.55 43.8 43.8 4.95 42.0 42.0 5.39 40.0 40.0 5.86 38.0 38.0 6.37
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4AS(F,B) 048 1.00 1.00 FG3ASA 048 0.98 1.00
060 1.03 1.01 060 1.00 1.01
38YCB060-90, 92 Outdoor SectionWith F(A,B)4AS(F,B)060 Indoor Section
1750 72 67.5 33.7 5.11 64.7 32.7 5.61 61.8 31.6 6.18 58.6 30.5 6.81 55.5 29.4 7.51 52.0 28.2 8.27
67 61.9 43.0 4.91 59.3 41.9 5.41 56.5 40.8 5.97 53.7 39.7 6.59 50.8 38.6 7.27 47.6 37.3 8.02
62 56.8 52.0 4.74 54.5 50.9 5.24 52.0 49.6 5.79 49.5 48.3 6.41 47.0 46.8 7.09 44.4 44.4 7.84
57 55.2 55.2 4.69 53.3 53.3 5.20 51.3 51.3 5.76 49.1 49.1 6.39 46.9 46.9 7.09 44.4 44.4 7.84
1900 72 68.1 34.6 5.19 65.2 33.6 5.70 62.1 32.5 6.26 59.0 31.4 6.89 55.8 30.3 7.59 52.3 29.1 8.36
67 62.5 44.6 4.99 59.8 43.5 5.49 57.0 42.4 6.05 54.1 41.3 6.67 51.2 40.1 7.36 47.9 38.9 8.11
62 57.6 54.2 4.83 55.2 53.0 5.32 52.8 51.7 5.88 50.2 50.1 6.50 47.9 47.9 7.19 45.2 45.2 7.96
57 56.4 56.4 4.79 54.5 54.5 5.30 52.3 52.3 5.87 50.1 50.1 6.50 47.8 47.8 7.20 45.3 45.3 7.96
2000 72 68.6 35.2 5.24 65.6 34.2 5.75 62.6 33.1 6.32 59.3 32.0 6.95 56.0 30.9 7.65 52.5 29.7 8.41
67 62.8 45.7 5.04 60.1 44.6 5.54 57.3 43.5 6.10 54.4 42.4 6.72 51.3 41.1 7.41 48.0 39.9 8.16
62 58.0 55.6 4.88 55.6 54.3 5.38 53.1 52.8 5.93 50.8 50.8 6.56 48.4 48.4 7.26 45.7 45.7 8.03
57 57.2 57.2 4.86 55.1 55.1 5.36 53.0 53.0 5.93 50.7 50.7 6.57 48.4 48.4 7.26 45.7 45.7 8.03
2150 72 69.0 36.1 5.32 66.0 35.1 5.83 62.9 34.0 6.39 59.6 32.9 7.03 56.2 31.8 7.73 52.7 30.6 8.49
67 63.3 47.2 5.12 60.5 46.1 5.62 57.7 45.0 6.18 54.7 43.9 6.80 51.6 42.7 7.49 48.3 41.4 8.24
62 58.7 57.5 4.96 56.2 55.9 5.46 53.9 53.9 6.03 51.6 51.6 6.66 49.1 49.1 7.36 46.5 46.5 8.13
57 58.2 58.2 4.95 56.1 56.1 5.46 53.9 53.9 6.03 51.5 51.5 6.66 49.1 49.1 7.36 46.5 46.5 8.13
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Cooling Indoor
Section Size Cooling Capacity Power Capacity Power
F(A,B)4AS(F,B) 060 1.00 1.00 FG3ASA 060 0.99 1.00
FB4ASB 070 1.02 1.02 — — —

11
Heat pump heating performance (S.I.)
See notes on pg. 12.
INDOOR
AIR
OUTDOOR COIL ENTERING AIR TEMPERATURES °C
–16 –8 0 4 8 12 16 20
Capacity
Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power
(C)
EDB L/ S Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw*
38YCB024-70 Outdoor SectionWith F(A,B)4ASF024 Indoor Section
12 340 3.39 3.12 1.39 4.44 4.04 1.63 5.64 5.08 1.90 6.32 5.90 2.05 7.04 7.01 2.22 7.87 7.87 2.42 8.75 8.75 2.64 9.67 9.67 2.88
380 3.44 3.17 1.41 4.51 4.10 1.65 5.73 5.16 1.91 6.42 5.99 2.06 7.15 7.11 2.22 7.98 7.98 2.42 8.88 8.88 2.64 9.82 9.82 2.88
420 3.49 3.21 1.43 4.56 4.15 1.66 5.80 5.21 1.92 6.49 6.05 2.07 7.22 7.18 2.23 8.06 8.06 2.43 8.97 8.97 2.65 9.93 9.93 2.89
15 340 3.28 3.01 1.41 4.33 3.94 1.66 5.51 4.96 1.94 6.18 5.76 2.10 6.89 6.86 2.27 7.70 7.70 2.47 8.57 8.57 2.70 9.48 9.48 2.95
380 3.33 3.06 1.43 4.39 4.00 1.68 5.60 5.04 1.95 6.28 5.85 2.11 6.99 6.96 2.28 7.82 7.82 2.48 8.70 8.70 2.70 9.63 9.63 2.95
420 3.37 3.10 1.45 4.45 4.05 1.69 5.66 5.09 1.96 6.34 5.91 2.12 7.07 7.03 2.28 7.90 7.90 2.48 8.79 8.79 2.71 9.73 9.73 2.95
18 340 3.16 2.91 1.43 4.21 3.83 1.69 5.38 4.84 1.98 6.04 5.63 2.14 6.74 6.71 2.32 7.54 7.54 2.53 8.39 8.39 2.76 9.28 9.28 3.01
380 3.21 2.95 1.45 4.27 3.89 1.71 5.46 4.92 1.99 6.13 5.71 2.15 6.84 6.81 2.33 7.65 7.65 2.54 8.52 8.52 2.77 9.43 9.43 3.01
420 3.26 3.00 1.47 4.33 3.94 1.72 5.53 4.97 2.01 6.20 5.78 2.17 6.92 6.89 2.34 7.74 7.74 2.54 8.61 8.61 2.77 9.54 9.54 3.02
21 340 3.05 2.80 1.44 4.10 3.73 1.72 5.25 4.73 2.02 5.89 5.49 2.19 6.59 6.56 2.37 7.37 7.37 2.59 8.21 8.21 2.83 9.08 9.08 3.08
380 3.10 2.85 1.47 4.16 3.78 1.74 5.33 4.80 2.03 5.98 5.58 2.20 6.69 6.66 2.38 7.49 7.49 2.59 8.34 8.34 2.83 9.23 9.23 3.08
420 3.14 2.89 1.49 4.21 3.83 1.75 5.39 4.85 2.05 6.06 5.65 2.21 6.77 6.74 2.39 7.58 7.58 2.60 8.44 8.44 2.83 9.35 9.35 3.09
24 340 2.92 2.69 1.46 3.98 3.63 1.75 5.12 4.61 2.06 5.75 5.36 2.23 6.43 6.40 2.42 7.20 7.20 2.64 8.02 8.02 2.89 8.88 8.88 3.14
380 2.98 2.74 1.48 4.04 3.68 1.76 5.19 4.68 2.07 5.84 5.44 2.25 6.53 6.50 2.43 7.32 7.32 2.65 8.15 8.15 2.89 9.03 9.03 3.14
420 3.02 2.78 1.50 4.10 3.73 1.78 5.26 4.73 2.09 5.91 5.51 2.26 6.61 6.58 2.44 7.41 7.41 2.66 8.26 8.26 2.89 9.14 9.14 3.15
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4ASF 024 1.00 1.00 FG3ASA 024 0.99 1.05
030 1.00 0.99 — — —
38YCB036-70, 90 Outdoor SectionWith F(A,B)4ASF036 Indoor Section
2500 5.42 4.98 2.22 7.03 6.40 2.49 8.86 7.98 2.78 9.93 9.26 2.95 11.1 11.0 3.14 12.3 12.3 3.36 13.7 13.7 3.61 15.1 15.1 3.88
560 5.49 5.05 2.26 7.13 6.49 2.52 9.00 8.10 2.80 10.1 9.40 2.97 11.2 11.2 3.14 12.5 12.5 3.36 13.9 13.9 3.60 15.3 15.3 3.87
640 5.60 5.15 2.31 7.26 6.60 2.56 9.15 8.23 2.83 10.2 9.54 2.99 11.4 11.4 3.16 12.7 12.7 3.37 14.1 14.1 3.62 15.6 15.6 3.88
15 500 5.22 4.80 2.25 6.84 6.22 2.54 8.65 7.79 2.84 9.70 9.04 3.02 10.8 10.8 3.21 12.1 12.1 3.44 13.4 13.4 3.69 14.8 14.8 3.97
560 5.30 4.87 2.28 6.94 6.32 2.57 8.78 7.90 2.86 9.84 9.17 3.04 11.0 10.9 3.22 12.2 12.2 3.44 13.6 13.6 3.69 15.0 15.0 3.96
640 5.41 4.97 2.34 7.06 6.43 2.61 8.93 8.03 2.90 10.0 9.32 3.06 11.1 11.1 3.24 12.4 12.4 3.46 13.8 13.8 3.70 15.2 15.2 3.97
18 500 5.02 4.62 2.27 6.65 6.05 2.58 8.44 7.60 2.91 9.46 8.82 3.09 10.6 10.5 3.29 11.8 11.8 3.52 13.1 13.1 3.78 14.4 14.4 4.06
560 5.11 4.69 2.31 6.75 6.14 2.61 8.57 7.71 2.93 9.60 8.95 3.11 10.7 10.7 3.30 12.0 12.0 3.52 13.3 13.3 3.78 14.7 14.7 4.05
640 5.21 4.79 2.37 6.87 6.25 2.66 8.71 7.84 2.96 9.76 9.10 3.13 10.9 10.8 3.32 12.2 12.2 3.54 13.5 13.5 3.79 14.9 14.9 4.06
21 500 4.83 4.44 2.30 6.46 5.88 2.63 8.23 7.40 2.97 9.22 8.60 3.16 10.3 10.2 3.36 11.5 11.5 3.60 12.8 12.8 3.86 14.1 14.1 4.14
560 4.91 4.52 2.34 6.56 5.97 2.66 8.35 7.52 2.99 9.37 8.73 3.18 10.5 10.4 3.38 11.7 11.7 3.61 13.0 13.0 3.86 14.3 14.3 4.14
640 5.02 4.61 2.40 6.68 6.08 2.71 8.49 7.64 3.03 9.53 8.88 3.21 10.6 10.6 3.40 11.9 11.9 3.62 13.2 13.2 3.88 14.6 14.6 4.15
24 500 4.61 4.24 2.33 6.26 5.70 2.67 8.01 7.21 3.03 8.99 8.38 3.22 10.0 9.99 3.44 11.2 11.2 3.68 12.4 12.4 3.95 13.7 13.7 4.23
560 4.70 4.32 2.37 6.36 5.79 2.70 8.14 7.32 3.05 9.13 8.51 3.24 10.2 10.1 3.45 11.4 11.4 3.69 12.7 12.7 3.95 14.0 14.0 4.23
640 4.81 4.42 2.42 6.48 5.90 2.75 8.28 7.45 3.09 9.29 8.66 3.28 10.4 10.3 3.48 11.6 11.6 3.71 12.9 12.9 3.96 14.2 14.2 4.24
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4ASF 036 1.00 1.00 FG3ASA 036 0.99 1.01
F(A,B)4AS(F,B) 042 1.00 0.97 — — —

12
Heat pump heating performance (S.I.) continued
* The kw values include the compressor, outdoor fan motor, and indoor blower motor.The kw from supplement heaters should be added to these
values to obtain total system kilowatts.
† The kw heating capacity values shown are net integrated values from which the defrost effect has been subtracted.The kw heating from supple-
ment heaters should be added to those values to obtain total system capacity.
EDB — Entering Dry Bulb
INDOOR
AIR
OUTDOOR COIL ENTERING AIR TEMPERATURES °C
–16 –8 0 4 8 12 16 20
Capacity
Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power
(C)
EDB L/ S Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw*
38YCB048-70, 90, 92 Outdoor SectionWith F(A,B)4AS(F,B)048 Indoor Section
12 650 6.41 5.89 3.05 8.38 7.63 3.25 10.9 9.79 3.48 12.3 11.5 3.61 13.9 13.8 3.75 15.8 15.8 3.92 17.8 17.8 4.12 20.1 20.1 4.34
750 6.48 5.96 3.08 8.49 7.72 3.27 11.0 9.92 3.49 12.4 11.6 3.60 13.9 13.9 3.72 15.9 15.9 3.89 18.1 18.1 4.08 20.4 20.4 4.30
850 6.56 6.03 3.13 8.58 7.81 3.31 11.1 9.99 3.50 12.5 11.7 3.61 14.2 14.2 3.74 16.1 16.1 3.88 18.2 18.2 4.05 20.4 20.4 4.25
15 650 6.35 5.84 3.19 8.33 7.58 3.40 10.8 9.71 3.64 12.2 11.4 3.78 13.8 13.7 3.93 15.6 15.6 4.11 17.7 17.7 4.32 19.9 19.9 4.55
750 6.43 5.91 3.23 8.42 7.67 3.42 10.9 9.82 3.64 12.3 11.5 3.77 13.8 13.8 3.89 15.8 15.8 4.07 17.9 17.9 4.27 20.1 20.1 4.49
850 6.50 5.98 3.27 8.52 7.75 3.45 11.0 9.90 3.66 12.4 11.6 3.77 14.1 14.0 3.91 15.9 15.9 4.06 18.0 18.0 4.24 20.2 20.2 4.45
18 650 6.29 5.79 3.34 8.27 7.52 3.55 10.7 9.62 3.80 12.1 11.3 3.95 13.6 13.6 4.10 15.5 15.5 4.30 17.5 17.5 4.52 19.7 19.7 4.76
750 6.37 5.86 3.37 8.36 7.61 3.57 10.8 9.72 3.80 12.2 11.4 3.93 13.7 13.7 4.07 15.6 15.6 4.25 17.7 17.7 4.46 19.9 19.9 4.69
850 6.44 5.92 3.41 8.45 7.69 3.60 10.9 9.81 3.81 12.3 11.5 3.94 13.9 13.8 4.07 15.8 15.8 4.24 17.8 17.8 4.43 20.0 20.0 4.65
21 650 6.24 5.73 3.48 8.21 7.47 3.70 10.6 9.54 3.96 12.0 11.2 4.11 13.5 13.4 4.28 15.3 15.3 4.48 17.3 17.3 4.72 19.4 19.4 4.96
750 6.31 5.80 3.51 8.30 7.55 3.71 10.7 9.63 3.96 12.1 11.3 4.09 13.6 13.6 4.25 15.5 15.5 4.44 17.5 17.5 4.65 19.6 19.6 4.88
850 6.39 5.87 3.54 8.39 7.63 3.74 10.8 9.72 3.97 12.2 11.4 4.10 13.7 13.7 4.24 15.6 15.6 4.42 17.7 17.7 4.62 19.8 19.8 4.84
24 650 6.20 5.70 3.64 8.18 7.44 3.86 10.5 9.46 4.13 11.9 11.1 4.29 13.4 13.3 4.46 15.1 15.1 4.67 17.1 17.1 4.91 19.2 19.2 5.18
750 6.27 5.76 3.66 8.25 7.51 3.87 10.6 9.55 4.12 12.0 11.2 4.27 13.5 13.4 4.43 15.3 15.3 4.63 17.3 17.3 4.85 19.4 19.4 5.09
850 6.34 5.83 3.70 8.31 7.57 3.89 10.7 9.63 4.13 12.1 11.3 4.27 13.6 13.6 4.42 15.5 15.5 4.61 17.5 17.5 4.82 19.6 19.6 5.05
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4AS(F,B) 048 1.00 1.00 FG3ASA 048 1.00 1.03
060 0.99 0.96 060 1.00 1.02
38YCB060-90, 92 Outdoor SectionWith F(A,B)4AS(F,B)060 Indoor Section
12 850 9.46 8.70 3.51 11.7 10.6 3.72 14.3 12.8 4.00 15.7 14.7 4.17 17.4 17.3 4.37 19.4 19.4 4.65 21.6 21.6 4.98 24.0 24.0 5.34
900 9.50 8.73 3.53 11.7 10.7 3.73 14.3 12.9 4.00 15.8 14.7 4.17 17.4 17.3 4.36 19.4 19.4 4.64 21.8 21.8 4.97 24.3 24.3 5.33
950 9.54 8.77 3.55 11.7 10.7 3.74 14.4 12.9 4.01 15.9 14.8 4.18 17.5 17.4 4.37 19.5 19.5 4.64 21.7 21.7 4.96 24.0 24.0 5.32
1000 9.59 8.81 3.57 11.8 10.7 3.76 14.4 13.0 4.02 15.9 14.9 4.19 17.6 17.5 4.38 19.6 19.6 4.65 21.7 21.7 4.97 24.0 24.0 5.32
15 850 9.42 8.66 3.73 11.6 10.6 3.96 14.2 12.8 4.25 15.7 14.6 4.43 17.3 17.2 4.64 19.2 19.2 4.93 21.4 21.4 5.26 23.7 23.7 5.63
900 9.46 8.70 3.75 11.7 10.6 3.97 14.3 12.8 4.25 15.7 14.7 4.43 17.3 17.3 4.63 19.3 19.3 4.91 21.5 21.5 5.24 23.9 23.9 5.61
950 9.51 8.74 3.77 11.7 10.6 3.98 14.3 12.9 4.26 15.8 14.7 4.43 17.4 17.3 4.64 19.4 19.4 4.91 21.5 21.5 5.23 23.7 23.7 5.60
1000 9.55 8.78 3.79 11.7 10.7 4.00 14.4 12.9 4.27 15.9 14.8 4.44 17.5 17.4 4.64 19.4 19.4 4.91 21.6 21.6 5.23 23.8 23.8 5.60
18 850 9.38 8.63 3.95 11.6 10.5 4.20 14.1 12.7 4.51 15.6 14.5 4.69 17.2 17.1 4.91 19.1 19.1 5.20 21.2 21.2 5.54 23.4 23.4 5.91
900 9.43 8.67 3.97 11.6 10.6 4.20 14.2 12.8 4.50 15.6 14.6 4.69 17.3 17.2 4.90 19.2 19.2 5.18 21.3 21.3 5.52 23.6 23.6 5.89
950 9.47 8.70 3.99 11.6 10.6 4.21 14.2 12.8 4.51 15.7 14.6 4.69 17.3 17.2 4.90 19.2 19.2 5.18 21.3 21.3 5.51 23.5 23.5 5.88
1000 9.51 8.74 4.01 11.7 10.6 4.23 14.3 12.9 4.52 15.8 14.7 4.69 17.4 17.3 4.90 19.3 19.3 5.18 21.4 21.4 5.50 23.6 23.6 5.87
21 850 9.34 8.59 4.17 11.5 10.5 4.44 14.1 12.7 4.76 15.5 14.4 4.96 17.1 17.0 5.19 18.9 18.9 5.48 21.0 21.0 5.82 23.1 23.1 6.20
900 9.39 8.63 4.19 11.6 10.5 4.44 14.1 12.7 4.76 15.6 14.5 4.95 17.2 17.1 5.17 19.0 19.0 5.46 21.0 21.0 5.79 23.2 23.2 6.17
950 9.43 8.67 4.21 11.6 10.6 4.45 14.2 12.8 4.76 15.6 14.6 4.94 17.2 17.2 5.16 19.1 19.1 5.45 21.1 21.1 5.78 23.3 23.3 6.15
1000 9.47 8.71 4.23 11.6 10.6 4.46 14.2 12.8 4.77 15.7 14.6 4.95 17.3 17.2 5.16 19.2 19.2 5.44 21.2 21.2 5.77 23.4 23.4 6.14
24 850 9.29 8.54 4.40 11.5 10.5 4.69 14.0 12.6 5.03 15.4 14.4 5.23 16.9 16.9 5.46 18.8 18.8 5.77 20.8 20.8 6.12 22.9 22.9 6.52
900 9.34 8.59 4.42 11.5 10.5 4.69 14.1 12.6 5.02 15.5 14.4 5.21 17.0 16.9 5.44 18.9 18.9 5.74 20.9 20.9 6.09 23.0 23.0 6.48
950 9.38 8.62 4.43 11.6 10.5 4.70 14.1 12.7 5.02 15.5 14.5 5.21 17.1 17.0 5.43 18.9 18.9 5.72 21.0 21.0 6.07 23.1 23.1 6.45
1000 9.43 8.67 4.45 11.6 10.6 4.71 14.2 12.7 5.02 15.6 14.5 5.21 17.1 17.1 5.43 19.0 19.0 5.72 21.0 21.0 6.06 23.2 23.2 6.44
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4AS(F,B) 060 1.00 1.00 FG3ASA 060 0.99 1.03
FB4ASB 070 0.99 0.95 — — —

13
Heat pump heating performance (English)
See notes on pg. 14.
INDOOR
AIR
OUTDOOR COIL ENTERING AIR TEMPERATURES °F
–3 7 172737475767
Capacity
Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power
(F)
EDB CFM Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw*
38YCB024-70 Outdoor SectionWith F(A,B)4ASF024 Indoor Section
65 700 9.25 8.51 1.32 11.6 10.7 1.49 14.1 12.9 1.68 16.7 14.9 1.87 19.7 18.0 2.09 23.0 23.0 2.34 26.8 26.8 2.64 31.0 31.0 2.99
800 9.45 8.69 1.34 11.8 10.9 1.51 14.4 13.1 1.70 17.0 15.1 1.89 20.1 18.3 2.10 23.5 23.5 2.35 27.3 27.3 2.64 31.6 31.6 2.99
900 9.62 8.85 1.37 12.0 11.0 1.54 14.6 13.3 1.72 17.3 15.4 1.91 20.4 18.5 2.12 23.8 23.8 2.36 27.7 27.7 2.65 32.1 32.1 2.99
70 700 8.87 8.16 1.33 11.2 10.3 1.51 13.8 12.5 1.70 16.4 14.5 1.91 19.3 17.6 2.13 22.6 22.6 2.39 26.3 26.3 2.69 30.4 30.4 3.05
800 9.07 8.35 1.35 11.5 10.5 1.53 14.0 12.8 1.72 16.7 14.8 1.92 19.6 17.9 2.14 23.0 23.0 2.40 26.8 26.8 2.70 31.0 31.0 3.05
900 9.25 8.51 1.38 11.6 10.7 1.56 14.2 13.0 1.75 16.9 15.0 1.94 19.9 18.1 2.16 23.3 23.3 2.41 27.2 27.2 2.70 31.5 31.5 3.05
75 700 8.45 7.77 1.34 10.9 9.99 1.52 13.4 12.2 1.73 16.0 14.2 1.94 18.9 17.2 2.17 22.1 22.1 2.44 25.8 25.8 2.75 29.8 29.8 3.11
800 8.66 7.96 1.36 11.1 10.2 1.55 13.6 12.4 1.75 16.3 14.4 1.96 19.2 17.5 2.19 22.5 22.5 2.44 26.3 26.3 2.75 30.4 30.4 3.10
900 8.84 8.14 1.39 11.3 10.4 1.57 13.8 12.6 1.77 16.5 14.6 1.98 19.5 17.7 2.20 22.8 22.8 2.46 26.6 26.6 2.76 30.8 30.8 3.11
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4ASF 024 1.00 1.00 FG3ASA 024 0.99 1.05
030 1.00 0.99 — — —
38YCB036-70, 90 Outdoor SectionWith F(A,B)4AS(F,B)036 Indoor Section
65 1050 14.7 13.6 2.15 18.5 17.0 2.35 22.3 20.4 2.57 26.3 23.4 2.79 31.0 28.2 3.03 36.2 36.2 3.31 42.0 42.0 3.64 48.4 48.4 4.03
1200 15.1 13.9 2.19 18.8 17.3 2.40 22.7 20.7 2.61 26.8 23.8 2.82 31.6 28.7 3.06 36.8 36.8 3.32 42.8 42.8 3.64 49.3 49.3 4.02
1350 15.4 14.2 2.24 19.1 17.6 2.44 23.1 21.1 2.65 27.2 24.2 2.85 32.0 29.1 3.08 37.3 37.3 3.34 43.4 43.4 3.66 50.0 50.0 4.03
70 1050 14.0 12.9 2.16 17.9 16.4 2.38 21.7 19.8 2.61 25.7 22.8 2.84 30.3 27.6 3.10 35.3 35.3 3.38 41.0 41.0 3.72 47.3 47.3 4.11
1200 14.4 13.2 2.21 18.2 16.7 2.43 22.1 20.2 2.65 26.2 23.2 2.87 30.8 28.1 3.12 36.0 36.0 3.40 41.8 41.8 3.72 48.3 48.3 4.11
1350 14.7 13.5 2.27 18.5 17.0 2.48 22.5 20.5 2.69 26.6 23.6 2.91 31.3 28.5 3.15 36.5 36.5 3.42 42.5 42.5 3.74 49.0 49.0 4.12
75 1050 13.3 12.2 2.18 17.2 15.8 2.41 21.1 19.3 2.65 25.1 22.3 2.89 29.6 26.9 3.16 34.5 34.5 3.45 40.1 40.1 3.79 46.3 46.3 4.19
1200 13.7 12.6 2.23 17.6 16.2 2.45 21.5 19.6 2.69 25.6 22.7 2.92 30.1 27.4 3.18 35.2 35.2 3.47 40.9 40.9 3.80 47.2 47.2 4.19
1350 14.0 12.8 2.28 17.9 16.5 2.50 21.9 20.0 2.73 25.9 23.0 2.96 30.6 27.8 3.21 35.7 35.7 3.49 41.5 41.5 3.81 47.9 47.9 4.20
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4ASF 036 1.00 1.00 FG3ASA 036 0.99 1.01
F(A,B)4AS(F,B) 042 1.00 0.97 — — —

14
Heat pump heating performance (English) continued
* The kw values include the compressor, outdoor fan motor, and indoor blower motor.The kw from supplement heaters should be added to these
values to obtain total system kilowatts.
† The Btuh heating capacity values shown are net integrated values from which the defrost effect has been subtracted.The Btuh heating from sup-
plement heaters should be added to those values to obtain total system capacity.
EDB — Entering Dry Bulb
System Design
1. Intended for outdoor installation with free air inlet and outlet. Outdoor fan external static pressure available is less than
0.01-in. wg.
2. Minimum outdoor operating air temperature for cooling mode without low-ambient operation accessory is 55°F (12.8°C).
3. Maximum outdoor operating air temperature for cooling mode is 125°F (51.7°C), except for some 3 phase models it is 115°F
(46.7°C).
4. Minimum outdoor operating air temperature for heating mode is –30°F (–34.4°C).
5. Maximum outdoor operating air temperature for heating mode is 66°F (18.9°C).
6. For reliable operation, unit should be level in all horizontal planes.
7. Maximum elevation of indoor coil above or below base of outdoor unit is: indoor coil above = 50 ft (15.24m), indoor coil below
= 150 ft (45.72m). (See items 8 and 9 following.)
8. Forinterconnecting refrigeranttube lengths greaterthan 50ft (15.24m),consult Long-LineApplication Guidelineavailable from
equipment distributor.
9. Not more than 36 in. (912mm) of refrigerant tube should be buried in the ground. If necessary to bury tubes under a sidewalk,
provide a minimum 6-in. (152mm) vertical rise to the valve connections at the unit.
10. Use only copper wire for electric connection at unit. Aluminum and clad aluminum are not acceptable for the type of connector
provided.
11. Mixmatches of indoor coil capacity more than 1 size larger than outdoor unit capacity may result in inadequate indoor comfort.
INDOOR
AIR
OUTDOOR COIL ENTERING AIR TEMPERATURES °F
–3 7 172737475767
Capacity
Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power Capacity Kw Total Power
(F)
EDB CFM Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw* Total Integ† Kw*
38YCB048-70, 90, 92 Outdoor SectionWith F(A,B)4AS(F,B)048 Indoor Section
65 1400 18.7 17.2 3.27 23.2 21.3 3.41 27.9 25.4 3.56 33.3 29.6 3.72 39.6 36.1 3.92 46.9 46.9 4.13 55.8 55.8 4.41 66.0 66.0 4.74
1600 18.9 17.4 3.30 23.5 21.6 3.44 28.2 25.7 3.57 33.7 29.9 3.73 40.0 36.4 3.90 47.3 47.3 4.10 56.3 56.3 4.36 66.7 66.7 4.67
1800 19.1 17.6 3.34 23.7 21.8 3.47 28.5 26.0 3.60 34.0 30.2 3.75 40.3 36.6 3.91 47.8 47.8 4.11 56.7 56.7 4.34 67.3 67.3 4.64
70 1400 18.5 17.1 3.41 23.0 21.1 3.54 27.7 25.3 3.70 33.1 29.4 3.87 39.3 35.7 4.07 46.4 46.4 4.29 55.3 55.3 4.59 65.3 65.3 4.93
1600 18.8 17.3 3.43 23.3 21.4 3.56 28.0 25.5 3.71 33.4 29.7 3.87 39.6 36.0 4.05 47.0 47.0 4.27 55.7 55.7 4.53 65.9 65.9 4.85
1800 19.0 17.4 3.47 23.5 21.6 3.60 28.3 25.8 3.74 33.7 30.0 3.89 39.9 36.3 4.06 47.3 47.3 4.26 56.3 56.3 4.51 66.7 66.7 4.82
75 1400 18.5 17.0 3.57 22.8 21.0 3.68 27.6 25.2 3.85 32.9 29.2 4.02 38.9 35.4 4.23 46.1 46.1 4.47 54.6 54.6 4.76 64.6 64.6 5.12
1600 18.7 17.2 3.59 23.1 21.2 3.70 27.8 25.4 3.85 33.1 29.4 4.02 39.3 35.8 4.21 46.6 46.6 4.44 55.2 55.2 4.71 65.4 65.4 5.05
1800 18.9 17.4 3.62 23.3 21.4 3.73 28.1 25.6 3.88 33.4 29.7 4.03 39.6 36.1 4.22 47.0 47.0 4.43 55.7 55.7 4.69 66.0 66.0 5.01
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4AS(F,B) 048 1.00 1.00 FG3ASA 048 1.00 1.03
060 0.99 0.96 060 1.00 1.02
38YCB060-90, 92 Outdoor SectionWith F(A,B)4AS(F,B)060 Indoor Section
65 1750 28.9 26.6 3.87 33.8 31.1 4.03 39.0 35.5 4.21 44.9 39.8 4.41 51.4 46.7 4.66 58.9 58.9 4.97 68.0 68.0 5.38 78.3 78.3 5.91
1900 29.1 26.8 3.90 34.0 31.2 4.05 39.2 35.8 4.22 45.1 40.1 4.41 51.7 47.0 4.65 59.3 59.3 4.95 68.4 68.4 5.35 79.2 79.2 5.87
2000 29.2 26.9 3.92 34.1 31.4 4.07 39.4 35.9 4.23 45.3 40.2 4.42 51.8 47.2 4.65 59.5 59.5 4.95 68.7 68.7 5.34 79.1 79.1 5.86
2150 29.5 27.1 3.95 34.3 31.5 4.10 39.6 36.1 4.25 45.5 40.4 4.44 52.1 47.4 4.66 59.8 59.8 4.95 69.0 69.0 5.34 79.5 79.5 5.85
70 1750 28.7 26.4 4.06 33.7 31.0 4.25 38.8 35.4 4.43 44.7 39.7 4.65 51.1 46.5 4.90 58.6 58.6 5.22 67.5 67.5 5.64 77.6 77.6 6.17
1900 28.9 26.6 4.09 33.9 31.2 4.26 39.1 35.6 4.44 45.0 39.9 4.64 51.4 46.8 4.89 59.0 59.0 5.20 67.9 67.9 5.60 78.1 78.1 6.13
2000 29.0 26.7 4.11 34.1 31.3 4.28 39.2 35.7 4.45 45.1 40.1 4.65 51.6 46.9 4.89 59.2 59.2 5.19 68.2 68.2 5.59 78.4 78.4 6.11
2150 29.3 26.9 4.14 34.3 31.5 4.30 39.4 35.9 4.47 45.4 40.3 4.66 51.8 47.2 4.89 59.5 59.5 5.19 68.5 68.5 5.59 78.8 78.8 6.10
75 1750 28.4 26.1 4.26 33.6 30.9 4.47 38.8 35.3 4.66 44.5 39.5 4.89 50.8 46.3 5.15 58.2 58.2 5.48 67.0 67.0 5.92 77.0 77.0 6.47
1900 28.6 26.3 4.28 33.8 31.1 4.48 39.0 35.6 4.67 44.8 39.8 4.88 51.1 46.5 5.14 58.5 58.5 5.45 67.4 67.4 5.87 77.5 77.5 6.41
2000 28.8 26.5 4.30 34.0 31.2 4.50 39.1 35.7 4.68 44.9 39.9 4.89 51.3 46.7 5.13 58.7 58.7 5.44 67.6 67.6 5.85 77.8 77.8 6.39
2150 29.0 26.7 4.34 34.2 31.4 4.52 39.4 35.9 4.69 45.1 40.1 4.89 51.5 46.9 5.13 59.0 59.0 5.44 68.0 68.0 5.84 78.2 78.2 6.37
Multipliers for Determining the PerformanceWith Other Indoor Sections
Indoor
Section Size Heating Indoor
Section Size Heating Capacity Power Capacity Power
F(A,B)4AS(F,B) 060 1.00 1.00 FG3ASA 060 0.99 1.03
FB4ASB 070 0.99 0.95 — — —

15
Certified drawing—38YCB
A96221
AIR DISCHARGE
AIR IN
A SQ
B
P
C
3
/ 8 IN.
(9.5mm) DIA
TIEDOWN
KNOCKOUTS
(2) PLACES IN
BASEPAN
2
7
/ 8 ″
(73.0mm)
1 1 / 4 ″
(31.8mm)
H
G
F
E
FIELD CONTROL SUPPLY 
CONN
7
/
8
IN. (22.2mm) DIA 
HOLE
FIELD POWER SUPPLY CONN
7
/
8
IN. (22.2mm) DIA HOLE WITH 
1
1
/
8
IN. (28.6mm) DIA KNOCKOUT 
AND 1
3
/
8
IN. (34.9mm) DIA 
KNOCKOUT
3
/
8
IN. (9.5mm) DIA LIQUID 
LINE CONN
D DIA SERVICE LINE CONN
L
K
J
AIR IN
M
N
AIR DISCHARGE
AIR IN AIR IN
38YCB024
38YCB036
38YCB036
38YCB048
38YCB048
38YCB048
38YCB060
38YCB060
0
0
1
0
1
2
0
2
460.4
596.9
596.9
596.9
596.9
596.9
596.9
596.9
571.5
762.0
762.0
762.0
762.0
762.0
762.0
762.0
862.0
1014.4
1014.4
862.0
862.0
862.0
862.0
862.0
81.0
82.6
82.6
82.6
82.6
82.6
82.6
82.6

15.9
19.1
19.1
22.2
22.2
22.2
22.2
22.2
501.7
692.2
692.2
692.2
692.2
692.2
692.2
692.2
549.3
739.8
739.8
739.8
739.8
739.8
739.8
739.8

365.1
508.0
508.0
508.0
508.0
508.0
508.0
508.0
479.4
669.9
669.9
669.9
669.9
669.9
669.9
669.9
560.4
750.9
750.9
750.9
750.9
750.9
750.9
750.9
304.8
400.1
400.1
400.1
400.1
396.9
396.9
400.1
317.5
381.0
381.0
381.0
381.0
387.4
400.1
396.9
355.6
393.7
393.7
393.7
393.7
393.7
381.0
384.2
65.9
100.9
100.0
100.0
104.1
105.0
118.6
120.0
UNIT
SERIES
ELECTRICAL
CHARACTERISTICS ABCD
93.6
165.1
165.1
165.1
165.1
165.1
165.1
165.1
EFGHJKL MNP
SHIPPING
WEIGHT
X = YES
O = NO
X = YES
O = NO
1. Allow 30 In. (762.0mm) clearance to service side of
unit, 48 In. (1219.2mm) above unit, 6 In. (152.4mm) on one side, 12 In.(304.8mm)

on remaining side, and 24 In. (609.6mm) between
units for proper airflow.
2. Minimum outdoor operating ambient in cooling mode is
55°F(13°C), max 125°F(52°C).
3. Maximum outdoor operating ambient in the heating mode is 66°F(19°C).
4. Series designation is the 13th position of the unit
model number.
5. Center of gravity .
NOTES:
024
36
48, 60
22 1⁄2x 22 1⁄2
30 x 30
571.5 x 571.5
762.0 x 762.0
UNIT SIZE
MINIMUM
MOUNTING PAD
DIMENSIONS (In.)
MINIMUM
MOUNTING PAD
DIMENSIONS (mm)
AIR DISCHARGE
mm mm mm mm mm mm mm mm mm mm mm mm mm mm kg
38YCB024
38YCB036
38YCB036
38YCB048
38YCB048
38YCB048
38YCB060
38YCB060
0
0
1
0
1
2
0
2
18 1⁄8
23 1⁄2
23 1⁄2
23 1⁄2
23 1⁄2
23 1⁄2
23 1⁄2
23 1⁄2
22 1⁄2
30
30
30
30
30
30
30
33 15⁄16
39 15⁄16
39 15⁄16
33 15⁄16
33 15⁄16
33 15⁄16
33 15⁄16
33 15⁄16
5⁄8
3⁄4
3⁄4
7⁄8
7⁄8
7⁄8
7⁄8
7⁄8
3 3⁄16
3 1⁄4
3 1⁄4
3 1⁄4
3 1⁄4
3 1⁄4
3 1⁄4
3 1⁄4
19 3⁄4
27 1⁄4
27 1⁄4
27 1⁄4
27 1⁄4
27 1⁄4
27 1⁄4
27 1⁄4
21 5⁄8
29 1⁄8
29 1⁄8
29 1⁄8
29 1⁄8
29 1⁄8
29 1⁄8
29 1⁄8
14 3⁄8
20
20
20
20
20
20
20
18 7⁄8
26 3⁄8
26 3⁄8
26 3⁄8
26 3⁄8
26 3⁄8
26 3⁄8
26 3⁄8


22 1⁄16
29 9⁄16
29 9⁄16
29 9⁄16
29 9⁄16
29 9⁄16 
29 9⁄16
29 9⁄16
12 1⁄2
15
15
15
15 
15 1⁄4
15 3⁄4
15 5⁄8
12
15 3⁄4
15 3⁄4
15 3⁄4
15 3⁄4
15 5⁄8
15 5⁄8
15 3⁄4
14
15 1⁄2
15 1⁄2
15 1⁄2
15 1⁄2
15 1⁄2
15
15 1⁄8

145
222
220
220
229
231
261
264
UNIT
SERIES
ELECTRICAL
CHARACTERISTICS ABCD
3 11⁄16
6 1⁄2
6 1⁄2
6 1⁄2
6 1⁄2
6 1⁄2
6 1⁄2
6 1⁄2
EFGHJKL MNP
SHIPPING
WEIGHT
In. In. In. In. In. In. In. In. In. In. In. In. In. In. Lb.
S.I.
ENGLISH
X
X
X
X
O
O
O
O
O
X
X
X
X
X
X
X

230-1-50 400-3-50
X
X
X
X
O
O
O
O
O
X
X
X
X
X
X
X

230-1-50 400-3-50

16
A94370
38YCB BALANCE POINT WORKSHEET
BUILDING HEAT LOSS, KW
UNIT INTEGRATED HEATING CAPACITY, KW
Printed in U.S.A. 11-94
OUTDOOR TEMPERATURE, °C
-20 -10 010 20
30
20
10
40
BASED ON INDOOR ENT. AIR AT 21°C
AND AT RATED CFM
38YCB024 FB4AS024
38YCB036 FB4AS036
38YCB048 FB4AS048
38YCB060 FB4AS060
25

17
38YCB BALANCE POINT WORKSHEET
BUILDING HEAT LOSS, 1000 BTU/HR
UNIT INTEGRATED HEATING CAPACITY, 1000 BTU/HR
Printed in U.S.A. 11-94
OUTDOOR TEMPERATURE, °F
-10 010 20 30 40 50 60 70 80
70 60 50 40 30 20 10
80
38YCB024 FB4AS024
38YCB036 FB4AS036
38YCB048 FB4AS048
38YCB060 FB4AS060
BASED ON INDOOR ENT. AIR AT 70°F
AND AT RATED CFM
A94369

18
Guide specifications Air-Cooled, Split-System
Heat Pump
38YCB
2 To 5 Tons Nominal
(7 To 17.5 Kw)
GENERAL
System Description
Outdoor-mounted, air-cooled, split-system heat pump unit
suitable for ground or rooftop installation. Unit consists of a
hermetic compressor, an air-cooled coil, propeller-type
condenser fan, and a control box. Unit will discharge supply air
upward as shown on contract drawings. Unit will be used in a
refrigeration circuit to match up to a packaged fan coil or coil
unit.
Quality Assurance
Unit shall be manufactured in a facility registered to ISO9001/
BS5750 Part II, International Standard for Quality Systems.
Unit will be rated in accordance with the latest edition of ARI
Standard 240.
Unit construction will comply with latest edition of ANSI/
ASHRAE and with NEC (U.S.A. Standard).
Unit will be constructed in accordance with UL standards.
Unit cabinet will be capable of withstanding Federal Test
Method Standard No. 141 (Method 6061) 500-hr salt spray test
(U.S.A. Standard).
Air-cooled condenser coils will be leak tested at
150 psig(1034 KPa) and pressure tested at 300 psig
(2068 KPa).
Delivery, Storage, and Handling
Unit will be shipped as single package only and is stored and
handled per unit manufacturer’s recommendations.
PRODUCTS
Equipment
Factory-assembled, single piece, air-cooled heat pump unit.
Contained within the unit enclosure will be all factory wiring,
piping, controls, compressor, refrigerant charge (R-22), and
special features required prior to field start-up.
Unit Cabinet
Unit cabinet will be constructed of galvanized steel,
bonderized, and coated with a powder coat paint.
Fans
Condenser fan will be direct-drive propeller type, discharging
air upward.
Condenser fan motors will be totally enclosed, 1-phase type
with class B insulation and permanently lubricated bearings.
Shafts will be corrosion resistant.
Fan blades will be statically and dynamically balanced.
Condenser fan openings will be equipped with
PVC-coated steel wire safety guards.
Compressor
Compressor will be hermetically sealed.
Compressor will be mounted on rubber vibration isolators.
Condenser Coil
Condenser coil will be air cooled.
Coil will be constructed of aluminum fins mechanically
bonded to copper tubes which are then cleaned, dehydrated, and
sealed.
Refrigeration Components
Refrigeration circuit components will include liquid line
shutoffvalvewith sweat connections,suction shutoff valveswith
sweat connections, system charge of refrigerant R-22,
compressor oil, accumulator, and reversing valve.
Operating Characteristics
The capacity of the unit will meet or exceed ____ Btuh
(____kw) at a suction temperature of ____ F(____ C). The
power consumption at full load will not exceed ____ kw.
Combination of the unit and the evaporator or fan coil unit will
have a total net cooling capacity of ____ Btuh(____ kw) or
greater at conditions of ____ CFM(____ L/S) entering air
temperature at the evaporator at ____ F (____C) wet bulb
and ____ F(____ C) dry bulb, and air entering the unit
at ____ F(____ C).
Electrical Requirements
Nominal unit electrical characteristics will be ____ v,
1 phase, 50 hertz. The unit will be capable of satisfactory
operation within voltage limits of ____ v to ____ v.
Unit electrical power will be single point connection.
Control circuit will be 24v.
Special Features
Refer to section of this literature identifying accessories and
descriptions for specific features and available enhancements.

19

Carrier Corporation •Syracuse, New York 13221 6-96
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4 Page 20 Catalog No. 013-881 Printed in U.S.A. PC 101 Form 38YCB-C2PD
Tab 5a 5a Replaces: 38YCB-C1PD