Westinghouse 22 SEER, 10 HSPF iQ Drive Technical Literature
TECHNICAL
SPECIFICATIONS
FT4BI Series
R-410A, Ultra High Efficiency
Heat Pump, 21+ SEER, 12.5+ EER,
9.6 HSPF Residential System
2-3-4 Ton Capacities
The iQ Drive® Heat Pump System features fully variable
speed compressor technology and variable speed indoor
and outdoor motors. The system provides variable cooling
capacity as needed. It operates near the nominal rated
capacity at the thermostat set point and modulates as
temperature difference between set point and room
temperature changes. The system may run at additional
18% capacity to provide rapid cooling. The system has
a built-in humidity control that will activate humidier
equipment (if supplied), and reduces blower speed if
indoor relative humidity is greater than set point (default
set at 60%).
WARRANTY
FEATURES and BENEFITS
• iQ Drive: Inverter driven Panasonic rotary compressor
which provides fully variable operation.
• R-410A Refrigerant: Environmentally friendly non-
ozone depleting refrigerant.
• Designed using galvanized steel: with a polyester
urethane coat nish. The 950 hour salt spray nish resists
corrosion 50% better than comparable units.
• Copper Tube / Aluminum Fin Coils: Both indoor and
outdoor coils are designed to optimize heat transfer,
minimize size and cost, and increase durability and
reliability.
• Permanently Lubricated Motor: A heavy duty
brushless motor for long lasting reliability and quiet
operation. Requires no maintenance and is completely
protected from rain and snow.
• Compressor Sound Blanket: Engineered to signicantly
reduce unwanted compressor noise.
• Swept-Wing Fan Blade: Engineered to provide
quiet operation. The specic energy absorbing hub is
designed to reduce noise while operating through various
frequencies.
• Louvered Condenser Guard: Durable metal guard
protects the coil from yard hazards and extreme weather.
• Removable Top Grille Assembly: Allows ease of service
from the top without disconnecting fan motor leads.
• High Pressure Switch: Protects against abnormally high
system pressures. Auto-reset feature prevents nuisance
service visits.
• Low Pressure Switch: Protects against loss of system
refrigerant charge.
• Liquid Line Filter Drier: Included with unit, eld installed.
• One Piece Top/Orifice: Designed for maximum airow
and quiet operation.
• Easy Compressor and Control Access: Designed to
make servicing easier for the contractor, access panels
are provided to all controls and the compressor from the
side of the unit.
• Highest Efficiency with the lowest Sound Levels: Up
to 22 SEER with sound ratings of 59-72dB depending
upon operating conditions.
– This product offers a 10-year all-parts warranty.
– This product offers a 10 year Quality Pledge to replace
the entire unit, if the unit’s major component (heat
exchanger or compressor) fails within the rst 10 years
of operation, to the original owner. All split system
products must be installed with a matched indoor air
handler or indoor coil to qualify.
– Consumer product registration required for both 10
year All Parts Warranty and Quality Pledge within a
limited period of time after the installation. See current
warranty document or visit our consumer web for
warranty details.
MODEL IDENTIFICATION CODES
EX: FT4BI-036K
FT - Heat Pump
Design Series
FT 4 B I - 036 K
Product
Identifier
BI = Braze 20-25 SEER
DIMENSIONS
AIR CONDITIONER OUTDOOR SECTION
FT4BI 024K 036K 048K
H 37 41 45
W 31 1/4 31 1/4 31 1/4
D 31 1/4 31 1/4 31 1/4
Nominal
Capacity
(000) BTU
Electrical Code
K = 208/230-60-1
Air Discharge
Allow Adequate Clearance for Airflow
W
D
H
2
PHYSICAL AND ELECTRICAL SPECIFICATIONS / OUTDOOR UNITS
22 SEER — Ultra High Efficiency — Single Phase
Model Number FT4BI- 024K 036K 048K
Volts-Cycles-Phase (1) 208/230-60-1 208/230-60-1 208/230-60-1
Electrical Data
Condenser Data
Refrigerant suction line O.D.
(all length of liquid line are
3/8” O.D.)
Refrigerant charge (R-410A) in ounces for outdoor
unit, indoor unit and 15’ lineset.
Weight Net 190 220 225
Approximate (lbs.) Ship 200 230 235
(1) Operating Voltage Range: 187v min. — 253v max.
(2) HACR Type Circuit Breakers may be used.
(3) Requires Reducers.
Total Amps 13.0 18.0 22.0
Delay Fuse Max. (2) 25 35 45
Min. Circuit Ampacity 16.6 22.9 27.1
2
) 20.3 22.8 25.4
Coil
Area(ft
Rows-FPI 1 - 20 1 - 20 1 - 20
Tube Dia 3/8” O.D. 3/8” O.D. 3/8” O.D.
Type Brushless DC Brushless DC Brushless DC
Fan Motor
Amps 1.6 1.6 1.6
HP 0.5 0.5 0.5
Fan Blade
Dia-# Blades 24” - 2 24” - 2 24” - 2
SCFM 3200 3400 3600
Compressor Data RLA 11.4 16.4 20.4
0-24 ft. 3/4” 7/8” 7/8”
25-39 ft. 3/4” 7/8” 1 1/8” (3)
40-75 ft. 7/8” (3) 1 1/8” (3) 1 1/8” (3)
171 203 203
NOTE: Refrigerant Tubing Limitations-The compressor
manufacturer imposes a maximum equivalent line set
length of 100ft. Furthermore, vertical elevation shall
not exceed 50 ft.
ACCESSORIES
Controller/Thermostat
920621G
COPPER WIRE SIZE — AWG
(1% Voltage Drop)
Supply Wire Length-Feet Supply Circuit
200 150 100 50
6 8 10 14 15
4 6 8 12 20
4 6 8 10 25
4 4 6 10 30
3 4 6 8 35
3 4 6 8 40
2 3 4 6 45
2 3 4 6 50
Wire Size based on N.E.C. for 60° type copper
conductors.
Ampacity
3
SYSTEM COOLING CAPACITIES
22 SEER — Ultra High Efficiency — Single Phase
Outdoor Unit
Model Number FT4BI-
Indoor Unit
Range
Cooling Capacity
@95° OD BTUH
EER @
Nominal
Capacity
SEER
024K B6VMAI24K-B 11,300-26,900 14.6 22 22,800 500-950
036K B6VMAI36K-B 14,200-40,700 13.0 21 35,000 680-1110
048K B6VMAI48K-C 14,300-48,000 12.5 21 44,500 725-1800
Minimum operating ambient temperature is 40°F
NOTE: Each system was operated at its nominal capacity.
Indoor conditions were 80F° dry-bulb temperature and 67F° wet-bulb temperature (approx. 51% relative humidity, 95F
SYSTEM H EATING CAPACITIES
22 SEER — Ultra High Efficiency — Single Phase
Outdoor Unit
Model Number FT4BI-
024K B6VMAI24K-B 6,500-24,100 22,400 10 3.9 500-950
036K B6VMAI36K-B 11,300-39,900 34,000 9.6 3.4 680-1110
048K B6VMAI48K-C 11,400-47,800 46,000 10 3.6 725-1800
Minimum operating ambient temperature is 12°F
Indoor Unit
Range
Heating Capacity
@47° OD BTUH
Nominal
Capacity
HSPF
Nominal
Capacity
° outdoor temperature).
Range
SCFM
COP @
Nominal
CFM
Capacity
NOTE: Each system was operated at its nominal capacity.
Indoor conditions were 70F° dry-bulb temperature and 47F° dry bulb temperature, 43F
° wet bulb outdoor temperature
See current AHRI Directory for certified combinations and ratings.
www.ahridirectory.org
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