MODEL 225B
PREFERRED SERIES 15 HEAT PUMP
WITH PURON REFRIGERANT
1--1/2 TO 5 NOMINAL TONS
Product Data
TM
the environmentally sound refrigerant
Bryant’s heat pumps with Puronr refrigerant provide a collection
of features unmatched by any other family of equipment. The
225B has been designed utilizing Bryant’s Puron refrigerant. The
environmentally sound refrigerant allows consumers to make a
responsible decision in the protection of the earth’s ozone layer.
As an Energy Starr Partner, Bryant Heating & Cooling Systems
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
15.3 SEER/ 11.0 -- 13.0 EER/ 7.7 -- 9.0 HSPF
S
(Nominal)
SMicrotube Technologyt refrigeration system
SIndoor air quality accessories available
Sound
Sound level as low as 68 dBA
S
Comfort
System supports Thermidistatt or standard thermostat
deplete the ozone layer and low lifetime service cost.
SFront--seating service valves
SScroll compressor
SInternal pressure relief valve
SInternal thermal overload
SHigh pressure switch
SLoss of charge switch
SFilter drier
SBalanced refrigeration system for maximum reliability
Durability
DuraGuardt protection package:
SSolid, durable sheet metal construction
SSteel louver coil guard
SBaked--on, complete coverage, powder paint
Applications
S
Long--line -- up to 250 feet (76.20 m) total equivalent 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.)
S Low ambient (down to --20_F/--28.9_C) with accessory kit
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 designed and
manufactured to meet Energy Star criteria for
energy efficiency when matched with
appropriate coil components. Ho wever, proper
refrigerant charge and prop er ai r flo w are critical
to achieve rated capacity and e fficiency.
Installation of this product should follow all
manufacturing refrige rant chargi ng and air flow
instructions. Failur e to c onfirm proper charge
and air flow may reduce energy efficiency and
shorten equipment life.
ControlTXV (R --- 410A Hard Shutoff)
Charge (lb)5.67.67.07.48.99.612.5
COND FANPropeller Type, Direct Drive
Air DischargeVertical
Air Qty (C FM)2233322332233810381040464046
Motor HP1/121/121/121/51/51/41/4
Motor RPM800800800800800800800
COND COIL
Face Area (Sq ft)15.0920.1220.1222.6317.6020.1225.15
Fins per In.20202020202020
Rows1111222
Circuits4556779
VALVECONNECT.(In.ID)
Vapor5/85/83/43/47/87/87/8
Liquid3/8
REFRIGERANT TUBES (In. OD)
Rated Vapor*5/85/83/43/47/87/81 --- 1/ 8
Max Liqu id Line3/8”
*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.
225B
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 HP systems with Puron refrigerant:
VAPOR LINE SIZING AND COOLING CAPACITY LOSSES -- PURONR REFRIGERANT
1-- STAGE HEAT PUMP APPLICATIONS
Cooling C apacity Loss (%)
Unit
Nominal
Size (Btuh)
18,000
1 --- S t a g e
HP with
Puron
24,000
1 --- S t a g e
HP with
Puron
30,000
1 --- S t a g e
HP with
Puron
36,000
1 --- S t a g e
HP with
Puron
42,000
1 --- S t a g e
HP with
Puron
48,000
1 --- S t a g e
HP with
Puron
60,000+
1 --- S t a g e
HP with
Puron
Standard Length = 80 ft. (24.4 m) or less total equivalent length
Applications in this area are long line. Accessories are required as shown recommended on Long Line Application Guidelines
Applications in this area may have height restrictions that limit allowable total equivalent length, when outdoor unit is below indoor unit See Long Line Application Guidelines
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
1/21234678910
5/8001112233
5/8011233445
3/4000011111
5/8123345678
3/4001112223
7/8000011111
5/812456791011
3/4001122334
7/8000011112
3/4012234456
7/8001112223
3/4012345567
7/8001122233
3/412456791011
7/8012234455
1 --- 1 / 8000111111
Standard
Application
26---50
(7.9--- 15.2)
51---80
(15.5--- 24.4)
81---100
(24.7--- 30.5)
Total Equivalent Line Length ft. (m)
Long Line Application Requires Accessories
101---125
(30.8--- 38.1)
126---150
(38.4--- 45.7)
151---175
(46.0--- 50.3)
176---200
(53.6--- 60.0)
201---225
(61.3--- 68.6)
226---250
(68.9--- 76.2)
3
REFRIGERANT PIPING LENGTH LIMITATIONS
Maximum Line Lengths:
The maximum allowable total equivalent length for heat pumps varies depending on the vertical separation. See the tables below for
allowable lengths depending on whether the outdoor unit is on the same level, above or below the outdoor unit.
MAXIMUM LINE LENGTHS FOR HEAT PUMP APPLICATIONS
MAXIMUM ACTUAL LENGTH
Units on equal level200 (61)250 (76.2)N/A
Outdoor unit ABOVE
indoor unit
Outdoor unit BELOW
indoor unit
{ Total equivalent length accounts for losses due to elbows or fitting. See the Long Line Guideline for details.
ft (m)
200 (61)250 (76.2)200 (61)
See Table ’Maximum Total Equivalent Length: Outdoor Unit BELOW Indoor Unit’
MAXIMUM TOTAL EQUIVALENT LENGTH{-- OUTDOOR UNIT BELOW INDOOR UNIT
Liquid Line
Size
225B
18000
HP with
Puron
24000
HP with
Puron
30000
HP with
Puron
36000
HP with
Puron
42000
HP with
Puron
48000
HP with
Puron
60000
HP 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
Diameter
w/ TXV
3/8250*250*250*250*250*250*250*
3/8250*250*250*250*250*250*250*
3/8250*250*250*250*250*250*250*
3/8250*250*250*250*250*250*250*
3/8250*250*250*250*250*250*150
3/8250*250*250*250*230160--- ---
3/8250*225*190150110--- ------ ---
0 --- 2 0
(0 --- 6.1)
21---30
(6.4 --- 9.1)
HP with Puronr Refrigerant --- Maximum Total Equivalent Le ngth{
Vertical Separation ft (m) Outdoor unit BELOW indoor unit;
31---40
(9.4 --- 12.2)
MAXIMUM EQUIVALENT LENGTH{
41---50
(12.5 --- 15.2)
ft (m)
51---60
(15.5 --- 18.3)
MAXIMUM VERTICAL
SEPARATION ft (m)
61---70
(18.6 --- 21.3)
(21.6 --- 24.4)
71---80
LONG LINE APPLICATIONS
An application is considered Long Line when the refrigerant level in the system requires the use of accessories to maintain acceptable
refrigerant management for systems reliability. 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 Heat Pump systems, the chart below shows when an application is considered Long Line. Beyond these lengths, long line accessories
are required:
HP 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
3/880 (24.4)20 (6.1) vertical or 80 (24.4) total80 (24.4)
Note: SeeLongLineGuidelinefordetails
4
ACCESSORIES
ORDER
NUMBER
KAACH1701AAACRANKCASE HTRXXX
KAACH1401AAACRANKCASE HTRX
KAACH1601AAACRANKCASE HTRX
KAACH1201AAACRANKCASE HTRX
StandardCRANKCASE HTRS
KSACY0101AAACYCLE PROTECTORXXXXXXX
KAAFT0101AAAFREEZE THERMOSTATXXXXXXX
KSAHS1701AAAHARD START (CAP/RELAY)XXXXXXX
KHAIR0101AAAISOLATION RELAYXXXXXXX
KSALA0301410LOW AMBIENT PSWXXXXXXX
HC32GE229MOTOR FAN BALL BEARINGXXX
HC38GE228MOTOR FAN BALL BEARINGXX
HC40GE228MOTOR FAN BALL BEARINGXX
KSALA0601AAAMOTORMASTER 230VXXXXXXX
KHAOT0201SECOUTDOOR THERMOSTATXXXXXXX
KHAOT0301FSTOUTDOOR THERMOSTATXXXXXXX
KHASS0606MPK*HEAT PUMP SNOW RACKXXXXXXX
KHALS0401LLSSOLENOID VALVEXXXXXXX
KAACS0201PTCSTARTASSISTPTCXXXXXXX
KSASF0101AAASUPPORT FEETXXXXXXX
KAATD0101TDRTIME DELAYXXXXXXX
KSATX0201PURTXV PURON HSOXXX
KSATX0301PURTXV PURON HSOXX
KSATX0401PURTXV PURON HSOX
KSATX0501PURTXV PURON HSOX
x = Accessory S = Standard
* Order through RCD --- Totaline, part number KHASS 0606MPK (qty 6).
DESCRIPTION018 --- A024 -- -A030--- A036---A042---A048 -- -A060 --- A
225B
ACCESSORY THERMOSTATS
THERMOSTAT / SUBBASE
PKG.
T 6 --- P R H 0 1 --- AProgrammable Thermidistat
T 6 --- N R H 0 1 --- ANon---programmable Thermidistat
T6---PHP01Preferred Series Programmable HP Stat
T 6 --- N H P 0 1Preferred Series Non--- programmable HP Stat
T2---PHP01Legacy Series Programmable HP Stat
T 2 --- N H P 0 1Legacy Series Non --- programmable HP Stat
T1---PHP01Legacy RNC Series Programmable HP Stat
T 1 --- N H P 0 1Legacy RNC Series Non --- programmable HP Stat
TSTATXXSEN01---B*Outdoor Air Temperature Sensor
TSTATXXNBP01Backplate for Non--- Programmable Thermostat
TSTATXXPBP01Backplate for Programmable Thermostat and Thermidistatt Control
TSTATXXSBP01Backplate for Standard Programmable Thermostat
TSTATXXBBP01Backplate for Builder’s Thermostat
TSTATXXCNV10**Thermostat Conversion Kit (4 to 5 Wire) — 10 Pack
* Outdoor temperature sensor is an accessory for all Bryant electronic th ermostats, except the non ---programmable air conditioner version and builder;s
thermostats. It allows the temperature at a remote location (outdoors) to be displayed on the thermostat. The outdoor air temperature sensor must be used
with the HybridHeatt (dual fuel) thermostat. The outdoor air temperature sensor is included with the Thermidistat Control and HybridHeatt (dual fuel)
thermostat.
** Thermostat conversion kit is a 24 --- vac accessory that can turn a 4 --- wire thermostat application into a 5 --- wire application. This kit can also be used to
replace a broken thermostat wire, or add an extra wire when needed.
DESCRIPTION
5
ACCESSORY USAGE GUIDELINE
REQUIRED FOR LOW--- AMBIENT
Accessory
AccumulatorStandardStandardStandard
Ball Bearing F an MotorYe s{NoNo
Compressor Start Assist Capacitor and
Relay
Crankcase HeaterYe s
Evaporator Freeze ThermostatYe sNoNo
Hard Shutoff TXVYe sYe sYe s
Isolation RelayYesNoNo
Liquid Line Solenoid ValveNo
Motor Master Control or
Low Ambient Switch
Support FeetRecommendedNoRecommended
* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 f t. (6.09 m) vertical differential, refer to Residential Piping and Longline Guideline.
{ Additional requirement for Low - --Ambient Controller (full modulation feature) MotorMasterr Control.
COOLING APPLICATIONS
(Below 55F / 12.8C)
Ye sYe sNo
See Long--- Line Application Guideline
Ye sNoNo
REQUIRED FOR
LONG LINE APPLICATIONS*
Ye s
Accessory Description and Usage (Listed Alphabetically)
1. Ball--Bearing Fan Motor
225B
A fan motor with ball bearings which permits speed reduction
while maintaining bearing lubrication.
Usage Guideline:
Required on all units when using MotorMasterr
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. Evaporator Freeze Thermostat
An SPST temperature--actuated switch that stops unit operation
when evaporator reaches freeze--up conditions.
Usage Guideline:
Required when low ambient kit has been added.
6. Isolation Relay
An SPDT relay which switches the low--ambient controller out of
the outdoor fan motor circuit when the heat pump switches to
heating mode.
Usage Guideline:
Required in all heat pumps where low ambient kit has
been added.
7. Liquid--Line Solenoid Valve (LLS)
An electrically operated shutoff valve which stops and starts
refrigerant liquid flow in response to compressor operation. It is
to be installed at the outdoor unit to control refrigerant off cycle
migration in the heating mode.
Usage Guideline:
An LLS is required in all long line heat pump
applications to control refrigerant off cycle migration in
the heating mode. See Long Line Guideline.
8. 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.
The control will maintain working head pressure at low--ambient
temperatures down to 0_F (--17.8_C)when properly installed.
Usage Guideline:
A Low--Ambient Pressure Switch or MotorMasterr
Low--Ambient Controller must be used when cooling
operation is used at outdoor temperatures below 55_F
(12.8_C).
9. 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
6.5_C).
Usage Guideline:
A MotorMasterr
Low 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.
REQUIRED FOR
SEA COAST APPLICATIONS
(Within 2 miles / 3.22 km)
No
No
6
Accessory Description and Usage (Listed Alphabetically) -- CONTINUED
10. 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.
Usage Guideline:
Suggested for all Bryant thermostats listed in this
publication.
11. Outdoor Thermostat
An SPDT temperature--actuated switch which turns on
supplemental electric heaters when outdoor air temperature drops
below a user--selected set point.
Usage Guideline:
Electric supplemental heat applications in non--variable
speed indoor units when electric heat staging is desired.
12. Secondary Outdoor Thermostat
An SPDT temperature--actuated switch which turns on
third--stage of supplemental electric heaters when outdoor air
temperature drops below the second--stage set point.
Usage Guideline:
Outdoor thermostat applications where electric heater is
capable of three--stage operation.
13. Snow Stand
Coated wire rack which supports unit 18 in. (457.2 mm) above
mounting pad to allow for drainage from unit base.
Usage Guideline:
Suggested in the following applications:
Heat pump installations in heavy snowfall areas.
Heat pump installations in snow drift locations.
Heat pump installations in areas of prolonged
subfreezing temperatures.
All commercial installations.
14. Thermostatic Expansion Valve (TXV) Bi--Flow
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.
Usage Guideline:
Accessory required to meet AHRI rating and system
reliability, where indoor not equipped.
Required in all heat pump applications designed with
Puron refrigerant.
15. 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:
Accessory required to meet AHRI rating, where indoor
*Permissible l imits 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 (ANSI/NFPA 70). The ampacity of non --- metal lic---sheathed cable (NM),
trade name ROMEX, shall be that of 60_C conditions, per the NEC (ANSI/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 (ANSI/NFPA
70).
} Length shown is as measured 1 way along wire path between unit and service panel for voltage drop not to exceed 2%.
* * T i m e --- D e l a y f u s e .
FLA --- Fu l l L o a d A m p s
LRA --- L o ck ed Ro t o r A m p s
M C A ---Minimum 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.
225B
All motors/compressors contain internal overload protection.
Complies with 2007 requirements of ASHRAE Standards 90.1
BUILDING HEAT LOSS, UNIT INTEGRATED HEATING CAPACITY, MBTUH
11
Wall
6”
A07833
(152.4)
225B
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
24”
(609.6)
Service
24”
(609.6)
Service
24”
CLEARANCES
(609.6)
Service
12
24”
(609.6)
Note: Numbers in ( ) = mm
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.