MODEL 126B
PREFERRED SERIES AIR CONDITIONER
WITH PURONREFRIGERANT
1--1/2 TO 5 NOMINAL TONS
Product Data
TM
the environmentally sound refrigerant
Bryant Air Conditioners with Puron r refrigerant provide a
collection of features unmatched by any other family of
equipment. The 126B has been designed utilizing Bryant’s Puron
refrigerant. The environmentally sound refrigerant allows you to
make a responsible decision in the protection of the earth’s ozone
layer.
As an Energy Starr Partner, Bryant Heating & Cooling has
determined that this product meets the Energy Starr guidelines
for energy efficiency. Refer to the combination ratings in the
Product Data for system combinations that meet Energy Starr
guidelines.
NOTE: Ratings contained in this document are subject to
change at any time. Always refer to the AHRI directory
(www.ahridirectory.org) for the most up--to--date ratings
information.
INDUSTRY LEADING
FEATURES / BENEFITS
Efficiency
14 -- 16.5 SEER / 11.5-- 13.5 EER
S
SMicrotube Technologyt refrigeration system
SIndoor air quality accessories available
deplete the ozone layer and low lifetime servce cost.
SScroll compressor
SInternal pressure relief valve
SInternal thermal overload
SFilter drier
SHigh and low pressure switches
SBalanced refrigeration system for maximum reliability
Durability
DuraGuardt protection package:
SSolid, durable sheet metal construction
SLouvered coil guard
SBaked--on, complete outer coverage, powder paint
Applications
Long--line -- up to 250 feet (76.20 m) total equivalent
S
length, up to 200 feet (60.96 m) condenser above
evaporator, or up to 80 ft. (24.38 m) evaporator above
condenser (See Longline Guide for more information.)
SLow ambient (down to --20_F/--28.9_C)) with
accessory kit
MODEL NUMBER NOMENCLATURE
1 2 3 4 5 6 7 8 9 10111214
NNNAA/NNNNNA/NA/NNA
126B N A036000A
Product
Famil y
1=AC2=
TierSEERMajor
Legacy
6=16
SEER
B=PuronN=
Series
VoltageVariation sCoolin g CapacityOpenOpenOpenMinor
208---230--- 1
or
A=
Standard
0=
Not
Defined
0=
Not
Defined
0=
Not
Defined
208/230---1
ISO 9001:2000
126B
the environmentally sound refrigerant
Use of the AHRI Certified
TM Mark indicates a
manufacturer’s
participation in the
program For verification
of certification for individual
products, go to
www.ahridirectory.org.
REGISTERED
This product has been desi gned and manufactu red to
meet Energy St ar criteria for energy effi ciency when
matched wit h appropriate coil components. However,
proper refrigerant charge and proper ai r f low ar e cri tical
to achieve rated capacity and effici ency. Installation of
this product should follow all manufacturing refrigerant
charging and air flow instructions. Failure to confirm
proper charge and air flow may reduce energy
efficiency and shorten equipment life.
STANDARD FEATURES
Feature018024030036042048060
Puron RefrigerantXXXXXXX
Maximum SEER *16.016.016.516.516.016.016.0
Scroll CompressorXXXXXXX
FieldInstalledFilterDrierXXXXXXX
Fron t Seat ing Service Va lvesXXXXXXX
Internal Pressure Relief ValveXXXXXXX
Internal Thermal OverloadXXXXXXX
Long Line capabilityXXXXXXX
Low Ambient capability with KitXXXXXXX
High Pressure SwitchXXXXXXX
Low Pressure SwitchXXXXXXX
Compressor Sound Blan ketXXXXXXX
Louvered Coil GuardXXXXXXX
* With approved combinations
X=Standard
Series
A=
Original
Series
UNIT SIZE ---VOLTAGE, SERIES0018---A024---A030 --- A036 --- A042---A048---A060 ---A
* Units are rated with 25 ft (7.6 m) of lineset length. See Vapor Line Sizing and Cooling Capacity Loss table when using other sizes and lengths of lineset.
Note: See unit Installation Instruction for proper installation.
{ See Liquid Line Sizing For Cooling Only Systems with Puron Refrigerant tables.
PHYSICAL DATA
2
REFRIGERANT PIPING LENGTH LIMITATIONS
Liquid Line Sizing and Maximum Total Equivalent Lengths
The maximum allowable length of a residential split system depends on the liquid line diameter and vertical separation between indoor and
outdoor units.
See Table below for liquid line sizing and maximum lengths :
Maximum Total Equivalent Length
Outdoor Unit BELOW Indoor Unit
Liquid
Size
18000
AC with
Puron
24000
AC with
Puron
30000
AC with
Puron
36000
AC with
Puron
42000
AC with
Puron
48000
AC with
Puron
60000
AC with
Puron
* Maximum actual length not to exce ed 200 ft (61 m)
{ Total equivalent length accounts for losses due to elbows or fitting. See the Long Line Guideline for details.
--- --- = o u t s i d e a c c e p t a b l e r a n g e
AC with Puron Refrigerant Maximum Total Equivalent Length{: Outdoor unit BELOW Indoor
0 --- 5
6 --- 1 0
(1.8--- 3.0)
11--- 20
(3.4--- 6.1)
{
for Cooling Only Systems with Puronr Refrigerant:
Vertical Separation ft (m)
21--- 30
(6.4--- 9.1)
31--- 40
(9.4--- 12.2)
41--- 50
(12.5--- 15.2)
51--- 60
(15.5--- 18.3)
61--- 70
(18.6--- 21.3)
71--- 80
(21.6--- 24.4)
126B
Maximum Total Equivalent Length
Outdoor Unit ABOVE Indoor Unit
Liquid
Size
18000
AC with
Puron
24000
AC with
Puron
30000
AC with
Puron
36000
AC with
Puron
42000
AC with
Puron
48000
AC with
Puron
60000
AC with
Puron
* Maximum actual length not to exceed 200 ft (61 m)
{ Total equivalent length accounts for losses due to elbows or fitting. See the Long Line Guideline for details.
--- --- = o u t s i d e a c c e p t a b l e r a n g e
AC with Puron Refrigerant Maximum Total Equivalent Length{: Outdoor unit ABOVE Indoor
25
(7.6)
26--- 50
(7.9--- 15.2)
51--- 75
(15.5--- 22.9)
Vertical Separation ft (m)
76--- 100
(23.2--- 30.5)
101--- 125
(30.8--- 38.1)
126--- 150
(38.4--- 45.7)
151--- 175
(46.0--- 53.3)
176--- 200
(53.6--- 61.0)
3
REFRIGERANT CHARGE ADJUSTMENTS
Liquid Line SizePuron Charge oz/ft
3/8
5/160.40
1/40.27
(Factory charge for lineset = 9 oz)
0.60
Units are factory charged for 15 ft (4.6 m) of 3/8” liquid line. The factory charge for 3/8” lineset 9 oz. When using other length or diameter
liquid lines, charge adjustments are required per the chart above.
Charging
Formula:
[(Lineset oz/ft x total length) – (factory charge for lineset)] = charge adjustment
Example 1: System has 15 ft of line set using existing 1/4“ liquid line. What charge adjustment is required?
Formula:(.27 oz/ft x 15ft) – (9 oz) = (-4.95) oz.
Net result is to remove 4.95 oz of refrigerant from the system
Example 2: System has 45 ft of existing 5/16” liquid line. What is the charge adjustment?
Formula:(.40 oz/ft. x 45ft) – (9 oz.) = 9 oz.
Net result is to add 9 oz of refrigerant to the system
LONG LINE APPLICATIONS
An application is considered Long Line, when the refrigerant level in the system requires the use of accessories to maintain acceptable
126B
refrigerant management for systems reliability. See Accessory Usage Guideline table for required accessories. Defining a system as long line
depends on the liquid line diameter, actual length of the tubing, and vertical separation between the indoor and outdoor units.
For Air Conditioner systems, the chart below shows when an application is considered Long Line.
AC WITH PURONr REFRIGERANT LONG LINE DESCRIPTION ft (m)
Beyond these lengths, long line accessories are required
Liquid Line SizeUnits On Same LevelOutdoor Below IndoorOutdoor Above Indoor
1/4
5/16120 (36.6)50 (15.2)120 (36.6)
3/880 (24.4)35 (10.7)80 (24.4)
Note: SeeLongLineGuidelinefordetails
No accessories needed within allowed
lengths
No accessories needed within allowed
lengths
175 (53.3)
VAPOR LINE SIZING AND COOLING CAPACITY LOSS
Acceptable vapor line diameters provide adequate oil return to the compressor while avoiding excessive capacity loss. The suction line
diameters shown in the chart below are acceptable for AC systems with Puron refrigerant:
Unit
Nominal
Size (Btuh)
18000
1Stage
AC with
Puron
24000
1Stage
AC with
Puron
30000
1Stage
AC with
Puron
36000
1Stage
AC with
Puron
42000
1Stage
AC with
Puron
48000
1Stage
AC with
Puron
60000
1Stage
AC with
Puron
Applications in this area may be long line and may have height restriction s. See the Residential Piping and Long Line Guideline.
Maximum
Liquid Line
Diameters
(In. OD)
3/8
3/8
3/8
3/8
3/8
3/8
3/8
Vapo r Line
Diameters
(In. OD)
1/21235678911
5/8011122233
3/4000011111
5/8012233455
3/4001111122
7/8000001111
5/8123345678
3/4001112223
7/8000011111
5/812456891012
3/4011223344
7/8000111122
3/4012234456
7/8001112223
11/8000000000
3/4012345567
7/8001122233
11/8000000011
3/412456791011
7/8012234455
11/8000111111
26---50
(7.9--- 15.2)
51---80
(15.5--- 24.4)
81---100
(24.7--- 30.5)
Cooling C apacity Loss (%)
Total Equivalent Line Le ngth ft. (m)
101---125
(30.8--- 38.1)
126---150
(38.4--- 45.7)
151---175
(46.0--- 53.3)
176---200
(53.6--- 61.0)
201---225
(61.3--- 68.6)
226---250
(68.9--- 76.2)
4
ACCESSORY THERMOSTATS
THERMOSTAT / SUBBASE
PKG.
T 6 --- P R H 0 1 --- AProgrammable Thermidistat
T 6 --- N R H 0 1 --- ANon --- programmable Thermidistat
T 6 --- P A C 0 1Preferred Series Programmable AC Stat
T 6 --- N A C 0 1Preferred Series Non--- programmable AC Stat
T 2 --- P A C 0 1Legacy Series Programmable AC Stat
T 2 --- N A C 0 1Legacy Series Non--- programmable AC Stat
T 1 --- P A C 0 1Legacy RNC Series Programmable AC Stat
T 1 --- N A C 0 1Legacy RNC Series Non --- programmable AC Stat
TSTATBBSEN01---BOutdoor Air Temperature Sensor
TSTATXXBBP01Backplate for Builder’s Thermostat
TSTATXXNBP01Backplate for Non---Programmable Thermostat
{ Required accessories include ball bearing fan motor, compressor start assist (CAP / Relay), crankcase heater, evaporator freeze stat, hard shut ---off TXV.
X = Accessory / S --- Standard
Compressor Start Assist Capacitor and RelayYesYesNo
Crankcase HeaterYesYe sNo
Evaporator Freeze ThermostatYesNoNo
H a r d S h u t --- O f f T X VYesYesYes
Liquid Line Solenoid ValveNoNoNo
Motor MasterControl or
L o w --- a m b i e n t P r e s s ur e S w i t c h
Support FeetRecommendedNoRecommended
* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Residential Split---System Longline
Accessory Description and Usage (Listed Alphabetically)
1. Ball--Bearing Fan Motor
126B
A fan motor with ball bearings which permits speed reduction
while maintaining bearing lubrication.
Usage Guideline:
Required on all units when MotorMasterris used.
2. Compressor Start Assist -- Capacitor and Relay
Start capacitor and relay gives a ”hard” boost to compressor
motor at each start up.
Usage Guideline:
Required for reciprocating compressors in the
following applications:
Long line
Low ambient cooling
Hard shut off expansion valve on indoor coil
Liquid line solenoid on indoor coil
Required for single--phase scroll compressors in the
following applications:
Long line
Low ambient cooling
Suggested for all compressors in areas with a history of
low voltage problems.
3. Compressor Start Assist — PTC Type
Solid state electrical device which gives a ”soft” boost to the
compressor at each start--up.
Usage Guideline:
Suggested in installations with marginal power supply.
4. Crankcase Heater
An electric resistance heater which mounts to the base of the
compressor to keep the lubricant warm during off cycles.
Improves compressor lubrication on restart and minimizes the
chance of liquid slugging.
Usage Guideline:
Required in low ambient cooling applications.
Required in long line applications.
Suggested in all commercial applications.
5. Cycle Protector
The cycle protector is designed to prevent compressor short
cycling. This control provides an approximate 5--minute delay
after power to the compressor has been interrupted for any
reason, including power outage, protector control trip, thermostat
jiggling, or normal cycling.
6. Evaporator Freeze Thermostat
An SPST temperature--actuated switch that stops unit operation
when evaporator reaches freeze--up conditions.
7. Low--Ambient Pressure Switch Kit
A long life pressure switch which is mounted to outdoor unit
service valve. It is designed to cycle the outdoor fan motor in
order to maintain head pressure within normal operating limits
(approximately 100 psig to 225 psig). The control will maintain
working head pressure at low--ambient temperatures down to 0_F
(--18_C) when properly installed.
Low--Ambient Controller must be used when cooling operation is
used at outdoor temperatures below 55_F (12.8_C).
8. MotorMasterr Low--Ambient Controller
A fan--speed control device activated by a temperature sensor,
designed to control condenser fan motor speed in response to the
saturated, condensing temperature during operation in cooling
mode only. For outdoor temperatures down to --20_F (--28.9_C),
it maintains condensing temperature at 100_F 10_F (37.8_C
5.5_C).
9. Outdoor Air Temperature Sensor
Designed for use with Bryant Thermostats listed in this
publication. This device enables the thermostat to display the
outdoor temperature. This device also
is required to enable special thermostat features such as auxiliary
heat lock out.
REQUIRED FOR LONG
LINE
APPLICATIONS*
(Over 80 ft./24.38 m)
(Within2miles/3.22km)
Usage Guideline:
Required when low ambient kit has been added.
Usage Guideline:
A Low--Ambient Pressure Switch or MotorMasterr
Usage Guideline:
A MotorMasterrLow Ambient Controller or
Low--Ambient Pressure Switch must be used when
cooling operation is used at outdoor temperatures
below 55_F (12.8_C).
Suggested for all commercial applications.
Usage Guideline:
Suggested for all Bryant thermostats listed in this
publication.
REQUIRED FOR
SEA COAST
APPLICATIONS
6
Accessory Description and Usage (Listed Alphabetically) (Continued)
10. Support Feet
Four stick--on plastic feet that raise the unit 4 in. (101.6 mm)
above the mounting pad. This allows sand, dirt, and other debris
to be flushed from the unit base, minimizing corrosion.
Usage Guideline:
Suggested in the following applications:
Coastal installations.
Windy areas or where debris is normally circulating.
Rooftop installations.
For improved sound ratings.
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.
Hard shut off types are available.
NOTE: When using a hard shut off TXV with single phase
reciprocating compressors, a Compressor Start Assist Capacitor
and Relay is required.
Usage Guideline:
Required to achieve AHRI ratings in certain equipment
combinations. Refer to combination ratings.
Hard shut off TXV or LLS required in air conditioner
long line applications.
Required for use on all zoning systems.
12. Time--Delay Relay
An SPST delay relay which briefly continues operation of indoor
blower motor to provide additional cooling after the compressor
cycles off.
NOTE: Most indoor unit controls include this feature. For those
that do not, use the guideline below.
Usage Guideline:
For improved efficiency ratings for certain
combinations of indoor and outdoor units. Refer to
AHRI Unitary Directory.
13. Winter Start Control
This control is designed to alleviate nuisance opening of the
low--pressure switch by bypassing it for the first 3 minutes of
operation.
* Permissible limits of the voltage range at which the unit will operate satisfactorily
{ If wire is applied at ambient greater than 30_C, consult table 310--- 16 of the NEC (NFPA 70). The ampacity of non --- metallic--- sheathed cable (NM), trade
name ROMEX, shall be that of 60_C conditions, per the NEC (NFPA 70) Article 336---26. If other than uncoated (no---plated), 60 or 75_C insulation, copper
wire (solid wire for 10 AWG or smaller, stranded wire for larger than 10 AWG) is used, consult applicable tables of the NEC (NFPA 70).
}Length shown is as measured one way along wire path between unit and service panel for voltage drop not to exceed 2%.
* * T i m e --- D el a y fu se .
FLA --- Fu l l L o a d A m p s
LRA --- Lo c k e d R o t o r A m p s
MCA --- Minimu m Circuit Amps
RLA ---RatedLoadAmps
NOTE: Control circuit is 24 --- V on all units and requires external power source. Copper wire must be used from service disconnect to unit.
All motors/compressors contain internal overload protection.
Complies with 2007 requirements of ASHRAE Standards 90.1
126BNA018AXOOO654.0728.795.219.0112.7539.8198.471.412.7336.6349.3323.961.773.9682.6 X 763.6 X 827.1
47.6
SQ.
A
AIR DISCHARGE
X = YES
O=NO
460-3-60
88.9
208/230-3-60
230-1-60
208-230-1-60
22.23 HOLE
SUPPLY CONN.
FIELD CONTROL
28.58 KNOCKOUT
22.23 HOLE WITH
FIELD POWER SUPPLY CONN.
B
126BNA024AXOOO792.2719.295.219.0166.7627.1231.871.412.7396.9393.7355.673.989.8822.3 X 901.7 X827.1
126BNA030AXOOO792.2820.895.219.0166.7627.1231.871.412.7419.1381.0374.775.792.5822.3 X 901.7 X912.8
126BNA036AXOOO889.0719.298.622.2166.7722.3231.874.615.9463.6428.6355.681.699.3917.6 X998.6 X 827.1
126BNA042AXOOO889.0993.898.622.2166.7722.3231.874.615.9457.2406.4444.5106.1127.5917.6 X 998.6 X 1085.8
126BNA048AXOOO889.0820.898.622.2166.7722.3231.874.615.9431.8444.5355.6112.5132.0917.6 X 998.6 X 912.8
126BNA060AXOOO889.01166.898.622.2166.7722.3231.874.615.9454.0473.1514.4152.9168.7917.6 X 998.6 X 1258.9
C
MINIMUM
D
VAPOR LINE C ONN.
DIMENSIONS
MOUNTING PAD
UNIT SIZE
18660.4 X 660.4
24,30800.1 X 800.1
36 THRU 60889.0 X 889.0
DIMENSIONS -- SI
10
Wall
6”
(152.4)
24”
Wall
Clearances (various examples)
Service
12”
(304.8)
6”
Wall
(152.4 mm)
12”
(304.8)
12”
(304.8)
12”
(304.8)
Wall
24”
(609.6)
24”
(609.6)
24”
(609.6)
Service
Service
Service
126B
24”
(609.6)
24”
(609.6)
CLEARANCES
24”
(609.6)
Service
11
24”
Note: Numbers in ( ) = mm
(609.6)
IMPORTANT: When installing multiple units in an alcove, roof well, or partially enclosed area, ensure there is adequate ventilation to prevent re--circulation of discharge air.