Bryant 544B User Manual
Bryant
Airconditioning
SPLIT-SYSTEM
Indianapolis, IN
City of Industry, CA
The 544B Outdoor Sections of split-system heat pumps are
designed for quiet, reliable heating during the winter and cooling
during the summer. These heat pump systems provide economy
of operation through energy conservation. They recover heat for
indoor comfort from outdoor air during the heating season and,
by automaticaliy reversing the refrigerant system, remove indoor
heat and excess humidity during the cooling season. All models
are API certified.
FEATURES
COMPRESSOR—Designed specifically for heat pump duty, with
high energy efficiency during heating and cooling operation.
Each compressor is hermetically sealed against contamination
to assure long life and dependable performance, internally
sprung and externally mounted on rubber isolators for quiet
operation. Continuous compressor operation is approved down
to -40°F in the heating mode, and down to 55°F in the cooling
mode. (See heating and cooling performance tables.) Ail models
include a discharge-tube muffler to prevent sound transmission
of the compressor pulsations to the indoors or outdoors.
HEAT PUMP UNITS
MODEL 544B
Sizes Q18 thru 060
BUILT-IN RELIABILITY COMPONENTS—Includes a suction-
tube accumulator that keeps liquid refrigerant from reaching the
compressor; a low-pressure switch that stops the compressor if
refrigerant charge is lost; a crankcase heater to keep the com
pressor oil warm and free of refrigerant for maximum lubricity; a
compressor relief valve for high-pressure protection; and com
pressor quick-start components to assure reliable operation of
the units during brownout conditions and low outdoor
temperatures.
PRINTED-CIRCUIT BOARD—The board incorporates a defrost
control which contains the defrost relay, defrost timer, and lowvoltage terminal board. The defrost control is a time/temperature
initiation/termination control which includes three field-selecta
ble time periods of 30,50, and 90 minutes.
The printed-circuit board also has a speedup feature that con
verts the defrost cycle time from minutes to seconds to aid in
troubleshooting.
WEATHER-PROTECTIVE CABINET—The low-profile design of
the 544B units, with the pleasing malibu beige and jade exterior,
blends in well with plants and shrubbery. Galvanized steel,
coated with a layer of zinc phosphate to which a coat of alkyd
melamine enamel is applied and baked on, is used throughout.
This provides a hard, smooth finish that lasts for many years. All
screws in the cabinet exterior are stainless steel for a durable,
rust-resistant, quality appearance.
TIME/TEMPERATURE DEFROST—The defrost cycle is initiated
by a time/temperature control to clear the coil of frost and ice.
The cycle is started only if the defrost thermostat senses ice
buildup on the outdoor coil. After a few minutes, the control
automatically returns the unit to the heating cycle.
UNIT DESIGN—All units are equipped with totally enclosed fan
motors for greater reliability under rain and snow conditions.
The large, wraparound coil is designed for optimum heat trans
fer during heating and cooling. The vertical air discharge carries
the sound and air up and away from adjacent patio areas and
foliage. Sufficient space is provided between rows of composite
coils so they can be cleaned with a common garden hose. A
divider panel is installed between the compressor and coil sec
tion so that the unit can be checked and serviced while
operating.
EXTERNAL SERVICE VALVES—Both brass refrigerant service
valves are externally located so that refrigerant tube connec
tions can be made quickly and easily. Each valve has a service
port for ease of checking operating refrigerant pressures. The
valves are designed for refrigerant tube flare connections.
PDS No. 544B.18 1B
Size A
018 & 024 42 30
030 & 036 42 30
042, 048 & 060 42 30
Clearance Requirements
(In Inches)
Bottom of unit to ground or
normal snow level
......................
6
Inlet air (both sides and coil
end)
...........................................
Discharge air (top)
...................
12
. 48
Service clearance (compressor
end)...........................................30
NOTE: Unit can be installed
with 6 in. clearance on LH side
(facing control end of unit) when
24-in. clearance is maintained
from RH side and coil end.
DIMENSIONS (In Inches)
B
c D
25-5/16 18-3/16
31-5/16
24-3/16
41-5/16 34-3/16
CERTIFICATION APPLIES ONLY WHEN
THE COMPLETE SYSTEM IS
LISTED WITH ARI.
E
20-1/4 5-3/4 3/8
26-1/4
36-1/4 6
F
5-3/4
G
H
3/4
3/8
3/4
3/8 3/4
HP-54
SIZE
SERIES
018 024 030
A A A
ELECTRICAL
Unit Volts—Hertz—Phase
Operating Voltage Range
Unit Ampacity for Wire Sizing
208-230—60—1
197—253
13.5
Min Wire Size (60 Copper) (AWG)* 14
Max Branch Circuit Fuse Size (Amps)
20
Total Unit Amps 11.0
Compressor Rated Load Amps 10.0
Locked Rotor Amps
49.0
Fan Motor, HP & Type
Full Load Amps
COMPRESSOR AND REFRIGERANT •
Compressor
Refrigerant Charge
7 lbs—14 oz 1 7 lbs—10 oz 1 9lbs—Ooz | 11 lbs—8 oz
OUTDOOR COIL & FAN
Coil Face Area (Sq Ft)
Rows & Fins Per Inch
Fan Diameter & No. of Blades
Rated Airflow (Cfm)
11.5
2&20 2 &20 2 &20
22 &3
2300 2300 2300
OPTIONAL EQUIPMENT
Room Thermostat w/Auto Changeover
Room Thermostat w/Manual Changeover
Room Thermostat—Night Set-Back
Unit Mounting Base
High-Pressure Switch
Indoor Fan Time Delay Relay
Thermal Expansion Valve Kit
Quick-Start Capacitor-Relay Kit
2-Way Flow Filter-Drier—Liquid Tube
Filter-Drier—Vapor Tube
Outdoor Thermostat and Mtg Bracket
COMPROTEC
Defrost Solenoid Kit
Swivel Ells—Liquid/VaporTubes
SPECIFICATIONS-544B
208-230—60—1
197—253
15.5 20.3 23.0 15.5
12 10
25 30 40 25
12.6 16.4
11.6 15.4
54.0 69.0
11.5 14.3 17.2 17.2 17.2
22 &3 22 &3 22 &3 22 &3
208-230—60—1208-230—60—1
197—253
TO I TO ^ TO I TO I TO I 05
P651-1066/P651-1068
1/10 &PSC
Hermetic
P271-3456
P271-3457
P271-3471
301392-702
309914-701
309919-701
Standard
309917-701
301399-701
P501-8031
310527-701
309915-701
311765-751
036
A
036
A A
208/230—60—3 460—60—3
197—253
10
187—253 414-506
12
18.6 12.6 5.6
17.6 11.6 5.1
88.0 65.1 32.8
2&20 2&20 2&20
2300 2300 2300
036
6.9
14
10
22 &3
SIZE
SER IES
1 ELECTRICAL
Unit Volts—Hertz—Phase 208-230-60-1
Operating Voltage Range
Unit Ampacity for Wire Sizing
Min Wire Size (60 Copper) (AWG}*
Max Branch Circuit Fuse Size (Amps) 45 30
Total Unit Amps 22.2
Compressor Rated Load Amps
Locked Rotor Amps
Fan Motor, HP & Type
Full Load Amps
COMPRESSO R AND R EFRIGER ANT
Compressor
Refrigerant Charge
OUTDOOR COIL & FAN
Coil Face Area (Sq Ft)
Rows & Fins Per Inch
Fan Diameter & No. of Blades
Rated Airflow (Cfm)
OPTIONAL EQUIP MEN T
Room Thermostat w/Auto Changeover
Room Thermostat w/Manual Changeover
Room Thermostat—Night Set-Back
Unit Mounting Base
High-Pressure Switch
Indoor Fan Time Delay Relay
Thermal Expansion Valve Kit
Quick-Start Capacitor-Relay Kit
2-Way Flow Filter-Drier—Liquid Tube 301399-701
Filter-Drier—Vapor Tube
Outdoor Thermostat and Mtg Bracket
COMPROTEC
Defrost Solenoid Kit 311765-751 I
Swivei Ells—Liquid/VaporTubes
042
A
197-253
27.5 17.6 8.3 30.8
10 12 14
21.2 13.3 6.2
108.0 74.0
1 1/10&PSC ¡
1
____
_______1_____L?_____
1 Hermetic
22.9 22.9 22.9 22.9
' 2&22 2&22
22 &3 22 &3 22 &3
2300 2300 2300
042 042
A
208/230-60-3 460-60-3 208-230-60-1
187-253 414-506 197-253
14.3 6.7 24.8
14 lbs—5 oz
309919-701
A
10 50 30
37.0 116.0 92.0 46.0 135.0 105.0
0.5 1
1
2& 22 2&22 2&22
048 048 048 060 060 060
A A A
208/230-60-3 460-60-3 208-230-60-1 208/230-60-3 460-60-3
187-253 414-506 197-253 187-253 414-506
8 14 14 8 10 12
23.8 14,8 7.0 29.2 18.7 10.0
_____
_______1_____
1
22 &3 22 &3
2300 2300
1
19.5 9.3 38.8 25.7 13.7
15.8 7.5 31.5 21.0 11.2
_______
13 lbs—0 oz
22.9 22.9 ! 22.9 22.9 22.9
P271-3456
P271-3457
P271-3471
301392-702
309914-701
309919-701
309917-701
P501-8032
310527-701
309915-701
P651-1066/P651-1068
15 60 40 20
1 1/3&PSC 1
0.5 i
1
____
2,3
' 2&22
1
____
22 &3
1
2&22
22 &3
2300 3500 3500 3500
Standard j 308791-751 1
A A
A J
1
15 lbs—8 oz
2&22 2&22
22 &3 22 &3
•
2.3 I
_____L2____
.
55.0
Standard 1
*lf other than 60°C copper wire is used, size can be determined from unit ampacity given in above tabie and appiicabie tabie of Nationai Eiectric
Code. Wire size seiected must have current capacity not iess than that of copper wire specified and must not create a voitage drop between service
panei and unit in excess of 2% of unit rated voitage.
tThe factory refrigerant charge is sufficient for systems requiring up to 30-feet of interconnecting tubing. For tubing lengths other than 30-feet, see
Installation Instructions for additional refrigerant requirements.
iSingle-phase units may use fuses or HACR-type circuit breakers (U.S. only) of same size as noted.
1
1
HP-55
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