Bryant 189BNV EVOLUTION, 288BNV EVOLUTION Service Manual
288BNV EVOLUTIONRV VARIABLE SPEED HEAT PUMP
189BNV EVOLUTION
R
V VARIABLE SPEED AIR CONDITIONER
WITH PURONr REFRIGERANT
Service Manual
TABLE OF CONTENTS
UNIT IDENTIFICATION 2.................................................................................
REFRIGERANT PIPING LENGTH LIMITATIONS 3...........................................................
LONG LINE APPLICATIONS 3.............................................................................
SAFETY CONSIDERATIONS 4.............................................................................
GENERAL INFORMATION 4..............................................................................
ELECTRICAL 5..........................................................................................
MAJOR COMPONENTS 5--7...............................................................................
AOC Board 5..........................................................................................
Inverter 5..............................................................................................
Variable Speed Compressor 5..............................................................................
Electronic Expansion Valve (EXP) 6.........................................................................
Outdoor Fan Motor 6.....................................................................................
Pressure Transducer (SPT) 6...............................................................................
Pressure Equalizer Valve (PEV) 6...........................................................................
Outdoor Coil Thermistor (OCT) 6...........................................................................
Suction Thermistor (OST) 7...............................................................................
Discharge Thermistor (ODT) 7.............................................................................
Crankcase Heater 7......................................................................................
Time--Delays 7.........................................................................................
COMMUNICATION AND STATUS FUNCTION LIGHTS 7.....................................................
CHECK CHARGE 9.......................................................................................
TROUBLESHOOTING 9--13................................................................................
Service Tool 14-- 31......................................................................................
System Communication Failure 14..........................................................................
Model Plug 14..........................................................................................
Status Codes 14.........................................................................................
Variable Speed Compressor Winding Resistance 14.............................................................
Fan Motor 15...........................................................................................
Control Fault 15........................................................................................
Brown Out Protection 15..................................................................................
230v Line (Power Disconnect) Detection 15...................................................................
Pressure Switch Protection 15..............................................................................
Suction Pressure Transducer (SPT) 15........................................................................
Temperature Thermistors 16...............................................................................
Fault Code Action Table 18................................................................................
Variable Speed Drive LED Location and Description 25..........................................................
Compressor Power Harness Assembly Replacement 26..........................................................
Inverter Assembly with Shield Gasket Installation 28............................................................
Compressor Replacement 31...............................................................................
WIRING DIAGRAMS 34-- 35.................................................................................
REFRIGERATION SYSTEM 36-- 40..........................................................................
Refrigerant 36..........................................................................................
Compressor Oil 36.......................................................................................
Servicing Systems on Roofs With Synthetic Materials 36.........................................................
Brazing 36.............................................................................................
Service Valves and Pump down 36..........................................................................
Liquid Line Filter Drier 39................................................................................
Suction Line Filter Drier 39................................................................................
Thermostatic Expansion Valve (TXV) 39.....................................................................
Accumulator 40.........................................................................................
REFRIGERATION SYSTEM REPAIR 40.....................................................................
PAGE
UNIT IDENTIFICATION
The unit is identified using a 16 digit model number structure. It is recommended providing the complete 16 digit model number when
ordering replacement parts to insure receiving the correct parts.
MODEL NUMBER NOMENCLATURE -- HEAT PUMP
12 3 4 5 6 78910 11 12 14
N N N A A/N N N N N A/N A/N N A
28 8 B N V 0360 0 0 A
Product
Famil y
2=HP 8=
Tier SEER Major
Evolution
8 = 18 SEER B=Puron N= 208---230 --- 1
Series
Series
Voltage V ariations Cooling Capacity Open Open Open Series
or 208/230 ---1
V=Variable
Speed
0=Not
Defined
0=Not
Defined
0=Not
DefinedA=Original
Series
MODEL NUMBER NOMENCLATURE -- AIR CONDITIONER
12 3 4 5 6 78910 11 12 14
N N N A A/N N N N N A/N A/N N A
18 9 B N V 0360 0 0 A
Product
Famil y
1=AC 8=
Tier SEER Major
Evolution
9 = 19 SEER B=Puron N= 208---230 --- 1
Series
Series
Voltage V ariations Cooling Capacity Open Open Open Series
or 208/230 ---1
V=Variable
Speed
0=Not
Defined
0=Not
Defined
0=Not
DefinedA=Original
Series
SERIAL NUMBER NOMENCLATURE
Week of Manufacture
01 06
E
00001
Serial Number
Year of Manufacture
Manufacturing Site
E = Collierville TN
X = Monterrey Mexico
2
REFRIGERANT PIPING LENGTH LIMITATIONS
Maximum Line Lengths:
The maximum allowable total equivalent length 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
MAXIMUM ACTUAL LENGTH
Units on equal level 100 (30.5) 100 (30.5) 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)
100 (30.5) 100 (30.5) 100 (30.5)
See Table ’Maximum Total Equivalent Length: Outdoor Unit BELOW Indoor Unit’
Maximum Total Equivalent Length{-- Outdoor Unit BELOW Indoor Unit
Liquid Line
Size
1 --- T o n 3/8 100* 100* 100* 100* 100* 100* 100*
2 --- T o n 3/8 100* 100* 100* 100* 100* 100* 100*
3 --- T o n 3/8 100* 100* 100* 100* 100* 100* 100*
4 --- T o n 3/8 100* 100* 100* 100* 100 100 --- --5 --- T o n 3/8 100* 100* 100* 100* 100 100 --- ---
* Maximum actual length not to exceed 100 ft (30.5 m)
{ Total equivalent length accounts for losses due to elbows or fitting.
--- --- = 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
0 --- 2 0
(0 --- 6.1)
21---30
(6.4 --- 9.1)
HP with Puronr Refrigerant --- Maximum Total Equivalent Length{
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 SEPARA-
61---70
(18.6 --- 21.3)
TION ft (m)
71---80
(21.6 --- 24.4)
LONG LINE APPLICATIONS
Unit is approved for up to 100 ft (30.5 m) equivalent length and vertical separations shown above with no additional accessories.
Longer line set applications are not permitted.
3
SAFETY CONSIDERATIONS
Installation, service, and repair of these units should be attempted
only by trained service technicians familiar with standard service
instruction and training material.
All equipment should be installed in accordance with accepted
practices and unit Installation Instructions, and in compliance with
all national and local codes. Power should be turned off when
servicing or repairing electrical components. Extreme caution
should be observed when troubleshooting electrical components
with power on. Observe all warning notices posted on equipment
and in instructions or manuals.
!
ELECTRICAL HAZARD -- HIGH VOLTAGE!
Failure to follow this warning could result in personal injury
or death.
Electrical components may hold charge. DO NOT remove
control box cover for 2 minutes after power has been
removed from unit.
PRIOR TO TOUCHING ELECTRICAL COMPONENTS:
Verify zero (0) voltage at inverter connections shown on
inverter cover.
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
!
WARNING
WARNING
WARNING
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
Refrigeration systems contain refrigerant under pressure. Extreme
caution should be observed when handling refrigerants. Wear
safety glasses and gloves to prevent personal injury. During normal
system operations, some components are hot and can cause burns.
Rotating fan blades can cause personal injury. Appropriate safety
considerations are posted throughout this manual where potentially
dangerous techniques are addressed.
If you do not understand any of the warnings, contact your
product distributor for better interpretation of the warnings.
GENERAL INFORMATION
The 288BNV & 189BNV split system heat pump and air
conditioners features a new outdoor cabinet design that uses a
four--sided coil design to minimize the unit footprint and provide
the best heat exchange taking full advantage of the latest variable
speed technology.
The heart of the system is the variable speed rotary compressor
powered through the use of the variable speed drive (VSD) inverter
control. Through the use of Puron refrigerant, compact ECM
outdoor fan motor, VSD and variable speed scroll compressor,
along with the new outdoor cabinet, the unit achieves a Seasonal
Energy Efficiency Ratio (SEER) of up to 19 and up to 11 Heating
Seasonal Performance Factor (HSPF).
To ensure ultimate comfort, these units should be combined with
either the FE fan coil or Variable Speed Gas furnace controlled
with a two wire communication Evolutionr Connext Control
SYSTXBBITC01, SYSTXBBITW01 or SYSTXBBITN01 with
version 11 software or newer. Version 12 software or newer
required for model size 13. This combination will ensure
achievement of comfort with the convenience of fingertip trouble
shooting and diagnostic capability. These units can also use a
standard, 2--stage or single--stage thermostat, for limited
functionality. However, 1 --ton models will require the use of an
Evolution Control.
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal
injury or equipment damage.
Puronr (R--410A) systems operate at higher pressures than
standard R --22 systems. Do not use R--22 service equipment
or components on Puronr equipment. Ensure service
equipment is rated for Puronr.
WARNING
4
ELECTRICAL
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Exercise extreme caution when working on any electrical
components. Shut off all power to system prior to
troubleshooting. Some troubleshooting techniques require
power to remain on. In these instances, exercise extreme
caution to avoid danger of electrical shock. ONLY TRAINED
SERVICE PERSONNEL SHOULD PERFORM
ELECTRICAL TROUBLESHOOTING.
Aluminum Wire
WARNING
MAJOR COMPONENTS
Application Operational Control Board (AOC)
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Aluminum wire may be used in the branch circuit (such as
the circuit between the main and unit disconnect), but only
copper wire may be used between the unit disconnect and the
unit.
Whenever aluminum wire is used in branch circuit wiring with this
unit, adhere to the following recommendations.
Connections must be made in accordance with the National
Electrical Code (NEC), using connectors approved for aluminum
wire. The connectors must be UL approved (marked Al/Cu with
the UL symbol) for the application and wire size. The wire size
selected must have a current capacity not less than that of the
copper wire specified, and must not create a voltage drop between
service panel and unit in excess of 2 of unit rated voltage. To
prepare wire before installing connector, all aluminum wire must
be “brush--scratched” and coated with a corrosion inhibitor such as
Pentrox A. When it is suspected that connection will be exposed to
moisture, it is very important to cover entire connection completely
to prevent an electrochemical action that will cause connection to
fail very quickly. Do not reduce effective size of wire, such as
cutting off strands so that wire will fit a connector. Proper size
connectors should be used. Check all factory and field electrical
connections for tightness. This should also be done after unit has
reached operating temperatures, especially if aluminum conductors
are used.
CAUTION
Unit Electrical Power
Power wires from the unit’s disconnect should be routed through
the power wiring hole provided at the bottom of the unit’s control
box.
Connect the ground wire to the ground connection in the control
box and connect the power wiring to the terminal block as shown
on the wiring and Installation Instructions supplied with the unit.
The unit does not require a contactor or outdoor unit transformer in
order to operate.
A13361
Fig. 1 – AOC (Application Operational Control) Board
The AOC board is located in the lower right hand side of inverter
tray. It’s functions include:
S Compressor speed control
S Outdoor fan motor control
S Reversing valve operation
S Defrost operation
S Crankcase heater operation
S Pressure switch monitoring
S Time Delays
S Pressure Transducer measurements
S PEV control (pressure equalizer valve)
S Temperature measurements
S EXV (Electronic Expansion Valve) operation control
S Inverter communication and control
Inverter
The inverter is located inside the control box. This is an air--cooled
device that communicates with the control board and drives the
compressor and fan motor to the demanded RPM. The inverter is
always powered with line voltage since no contactor is used. The
inverter changes the line voltage to DC volts and then recreates 3
phase sine waves that vary in frequency to drive the compressor
and fan motor at the desired RPM.
NOTE: The unit may be operated with an Evolution Connex
Control or a standard 2--stage HP thermostat. However, 1 --ton
models will require the use of an Evolution Control. Evolution
Connex Control will utilize 5 stages of heating and cooling, while
2--stage HP thermostat will only allow 2 discrete stages of heating
and cooling operation.
Variable Speed Compressor
This unit contains a variable speed rotary compressor that has a
wide operating range. It operates on a variable 3 phase sine wave
provided by the inverter. This compressor can only be operated by
the specific inverter supplied with the unit.
5
!
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
and/or improper operation.
Do not attempt to apply line voltage directly to the
compressor. This will destroy the compressor.
Electronic Expansion Valve (EXV)
This unit uses an electronic expansion valve for refrigerant
metering in the heating mode. The control board drives the EXV to
its proper position based on the operating mode and conditions.
The Evolution Connex Control Service mode allows for manual
opening and closing of the EXV for troubleshooting and pump
down.
Outdoor Fan Motor
The compact ECM outdoor fan motor is a variable--speed brushless
DC (BLDC) motor that operates at speeds from 400 to 1050 RPM.
The motor is a 3--phase permanent magnet--type motor. Just like
the compressor, this motor speed is determined by the inverter
output frequency and amplitude.
Motor speed is controlled through the inverter board in the outdoor
unit and no electronic module is attached. Motor speed is slowed as
the building load decreases, maintaining the proper condensing
temperature for both cooling and dehumidification. As the building
load increases, the motor will increase speed until it is at maximum
speed at the maximum building load.
At unit start--up, there is a slight delay and thrust motion of the fan
motor/blade in the reverse direction, prior to ramping--up the fan
assembly.
Pressure Transducer (SPT)
A 5 VDC output low pressure transducer that provides a 0--5 VDC
data for interpretation by the control board for a 0 to 200 psig
range of pressure at the suction tube. This interpreted pressure data
is then intelligently used by the AOC control board for low
pressure cut--out, loss of charge management, compressor
protection, oil circulation management, lubrication management
and EXV control.
Pressure Equalizer Valve (PEV)
At the end of every compressor operation (after the 3.5 minute
Time Guard period), the equalizer valve opens for 150 seconds
plus an additional 15 seconds of protection before allowing the
compressor to start ramping up.
The PEV is located next to the suction and discharge of the
compressor. The function of this valve is to prevent the
compressor from starting with a high refrigerant pressure
differential, thus helping the reliability of the compressor.
NOTE: A hissing sound may be heard during the equalization
process. This is normal.
Outdoor Coil Thermistor (OCT)
The outdoor coil thermistor is a 10Kohm resistor used for multiple
system operations. It provides the coil/liquid line temperature to
the heat pump board and user interface. Low ambient operation,
defrost initiation, defrost termination and assistance with OAT
temperature measurement of some of the functions (see Fig.4) .
The sensor must be securely mounted to the tube connecting the
EXV and distributor. See Fig. 2 and Fig. 3 for proper placement.
See Table 5 for proper resistances.
A14302
Fig. 2 – HP Outdoor Coil Thermistor (OCT) Attachment
Fig. 3 – AC Outdoor Coil Thermistor (OCT) Attachment
OAT Thermistor must be locked in place with
spherical nib end f acing towards the f ront of
the control box
Fig. 4 – OAT Thermistor Location (Bottom of Control Box)
(On Distributor Tube)
A14328
(On Distributor Tube)
A11142
6
Suction Thermistor (OST)
Suction Thermistor is used for assisting in EXV control and must
be secured on the suction tube and aligned longitudinally to the
vertical surface of the tube axis (see Fig. 5).
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
In order to minimize the ambient influence, make sure the
thermistor curved surface hugs the pipe surface and is
secured tight using the wire tie fished through the original
slot insulating polymer body.
CAUTION
Crankcase Heater Operation
This unit has an internal crankcase heater that will be energized
during the off cycle and is intelligently demanded by the system to
prevent the compressor from being the coldest part of the system
thus enhancing the reliability. The crankcase heater will function
as needed any time the outdoor unit is powered. The indoor unit
and UI do not need to be installed for the crankcase heater to
operate properly.
The compressor windings will occasionally be energized during
the OFF cycle (depending on the length of the OFF cycle) to start
the stator heat operation, thus maintaining a sump temperature that
is essential for compressor reliability. The compressor will not run
during this process.
Time Delays
The unit time delays include:
S 3.5 minute time delay after last cycle, initial power up, return
from brown--out condition. To bypass this feature, momentarily
short and release Forced Defrost pins.
S At the end of every compressor ON cycle, there will be 150
seconds of PEV open period for pressure equalization followed
by 15 seconds of PEV Off period before the next compressor
ON cycle. This delay cannot be bypassed as it helps compressor
reliability.
S 15 second delay at termination of defrost before the auxiliary
heat is de--energized.
S See Table 6 for other delay information.
S 10 minute sump warm--up delay. This delay is at the beginning
of each high voltage power up.
A14023
Fig. 5 – Suction Thermistor (OST) Attachment
(On Suction Tube)
Discharge Thermistor (ODT)
Discharge Thermistor is used for protection against over
temperature of the compressor. The ODT is located on the
compressor discharge stub--out (see Fig. 6).
A14024
Fig. 6 – Discharge Thermistor (ODT)
7
COMMUNICATION AND STATUS FUNCTION LIGHTS
Evolution Connex Control, Green Communications (COMM)
Light
A green LED (COMM light) on the outdoor board (see Fig. 7 and
8) indicates successful communication with the other system
products. The green LED will remain OFF until communication is
established. Once a valid command is received, the green LED will
turn ON continuously. If no communication is received within 2
minutes, the LED will be turned OFF until the next valid
communication. The green LED will be turned off when using a
standard 2--stage non--communicating heat pump thermostat.
Amber Status Light
Amber colored STATUS light indicates operation and error status.
See Table 6 for definitions.
S Two minute time delay to return to standby operation from last
valid communication.
Defrost
This user interface (UI) offers 4 possible defrost interval times: 30,
60 and 90 minutes, or AUTO. The default is AUTO.
Defrost interval times: 30, 60, and 90 minutes or AUTO are
selected by the Evolution Connex Control User Interface if using
UI. The 90 minute selection will default to 60 minutes at ambient
below 37 degrees. The UI setting will supersede the dip switch
settings on the control board if not the same.
If using non--communicating thermostat, defrost intervals are set
using dip switches on outdoor control board (see Fig. 7 and 8).
AUTO defrosts adjusts the defrost interval time based on the last
defrost time as follows:
S When defrost time <5 minutes, the next defrost interval=90
minutes. (outdoor temperature above 37_F)
S When defrost time 5--7 minutes, the next defrost interval=60
minutes.
S When defrost time >7 minutes, the next defrost interval=30
minutes.
The control board accumulates compressor run time. As the
accumulated run time approaches the selected defrost interval time,
the control board monitors the coil temperature sensor for a defrost
demand. If a defrost demand exists, a defrost cycle will be initiated
at the end of the selected time interval. A defrost demand exists
when the coil temperature is at or below 32_F(0_C) for 4 minutes
during the interval. If the coil temperature does not reach 32_F
(0_C) within the interval, the interval timer will be reset and start
over.
S Upon initial power up the first defrost interval is defaulted to 30
minutes. Remaining intervals are at selected times.
S Defrost is only allowed to occur below 50_F(10_C) outdoor
ambient temperature.
The defrost cycle is terminated as described below.
S When O AT is > 25_F(+3.89_C), defrost terminates if outdoor
coil temperature (OCT) > 60_F (+15.6_C). And a minimum of
one (1) minute defrost length.
S When OAT ≦ 25_F(+3.89_C), defrost will terminate if OCT is
>45_F(+4.4_C) and a minimum of 2 minutes defrost length.
S Or 10 minutes has passed.
At the defrost termination, the outdoor fan will turn on 10 seconds
before the reversing valve switching.
NOTE: Compressor speed during defrost will go to defrost speed.
Fig. 7 – AOC Control Board for 1 and 2 Ton
A150034
Fig. 8 – AOC Control Board for 3, 4 and 5 Ton
A14021
8
CHECK CHARGE
Charge in CHARGING mode (communicating only)
Unit is factory charged for 15ft (4.57 m) of lineset. If any
refrigerant charge adjustment is required due to the user inputted
line set length, the UI will calculate and display the target
subcooling and the amount of additional charge to be added.
Therefore, the UI is your source of information for charging the
system correctly. Refrigerant charge adjustment amount for adding
or removing 0.6 oz/ft (17.74 g/m) of 3/8 liquid line above or below
15ft (4.57 m) respectively. Perform a final charge check only when
in cooling and OD is between 65_F(18_C) and 100_F(38_C).
The use of a commercial charge metering device (restrictor) such as
Imperial liquid low side charger model 535--C or Watsco
ChargeFaster model CH200 is recommended when adding
refrigerant to an operating system. This prevents potential damage
of liquid slugging of the compressor and allows the subcooling to
stabilize quicker.
Charging using the subcooling method optimizes charge volume
and is preferred if possible. If the outdoor temperature is between
65_F -- 100_F (18.3_C -- 37.8_C) and indoor temperature is 70_F
-- 8 0 _F (21.1_C -- 26.7_C), the option to further adjust charge
using “service valve subcool” will be available in the “charging
mode selection” screen. If temperatures are outside of range, this
option will be greyed out and not selectable. Inaccurate charging
may result in nuisance fault codes.
Initial start--up can be performed using calculated charge only and
once conditions are within range, the ”Service Valve Subcool”
option will become selectable.
Once start is selected the system will operate in a preset mode until
“done” is selected. Wait for required stabilization time then check
subcooling at service valve.
Adjust charge as required to meet target service valve subcooling
shown on screen --3/+0 degree. If any adjustment is necessary, add
or remove the charge slowly (no greater than .5 lb per minute) and
allow system to operate for 25 minutes to stabilize, before
declaring a properly charged system.
Fig. 11 – Stabilization Time
A14575
Charging Non--Communicating Systems
Charging Procedure: Force system to operate in high stage
cooling by creating a large differential between room temperature
and set point on thermostat. Use multi-- meter to verify that 24
VAC is present between C, Y1 /Y2 terminals at outdoor unit.
Factory charge amount is shown on unit rating plate for high stage.
Target subcooling chart is provided on back of control box door
see Fig. 12 -- 26 for example. To properly check or adjust charge,
condition must be favorable for subcooling charging. Favorable
conditions exists when outdoor temperature is between 65_F
(18_C) and 100_F(38_C), and the indoor temperature is between
70_F(21_C) and 80_F(27_C). Follow the procedure below:
Unit is factory charged for 15ft (4.57 m) of lineset. Adjust charge
by adding or removing 0.6 oz/ft (17.7 g/m) of 3/8 liquid line above
or below 15ft (4.57 m) respectively.
For standard refrigerant line lengths (80ft/24.4 m or less), allow
system to operate in cooling mode at least 25 minutes. If conditions
are favorable, check system charge by subcooling method. If any
adjustment is necessary, adjust charge slowly and allow system to
operate for 25 minutes to stabilize before declaring a properly
charged system.
If the indoor temperature is below 70°F (21.11°C), or the outdoor
temperature is not in the favorable range, adjust charge for line set
length above or below 15ft (4.57 m) and indoor fan coil /furnace
coil per Table 1 and 2. Charge level should then be appropriate for
the system to achieve rated capacity. The charge level should then
be checked at another time when the both indoor and outdoor
temperatures are in a more favorable range.
NOTE: If the line length is beyond 80ft (24.38 m) or greater than
20ft (6.10 m) vertical separation see Long line guideline for special
charging requirement.
Fig. 9 – Adjusting Charge Using Service Valve Subcool
Fig. 10 – Service Valve Subcool Target Value
A14573
A14574
9
Table 1—Required Charge Adjustment for Indoor Coil Model -- HP
Furnace or Fan Coil Model Number
13 24B 25 36 37 48 60
CNPV*18** --- / / / / / /
CAP**18** --- / / / / / /
CNP**24 --- / / / / / /
CNPV*19** --- / / / / / /
CAP**24 --- / / / / / /
CSPH*24 --- / / / / / /
CSPH* 30** / / / / / / /
F(E,V)4(A,B,C)NF002 +0.19 --- --- --- --- / /
CAP**30 / --- / / / / /
CNP**30 / --- / / / / /
CNP**36 / --- --- --- --- / /
F(E,V)4(A,B,C)N(B,F)003 / --- --- --- --- / /
CAP**36 / --- --- --- --- / /
CNP**42 / +.50 --- --- +.75 / /
CAP**42 / +.50 --- --- +.75 / /
CSPH*36 / / --- --- +.75 / /
CSPH* 42** / / +.75 +.7 5 +.75 / /
CNP**31* * / / +.75 +.75 +.75 / /
CNP**48 / / +.75 +.75 +.75 --- /
CSPH* 48** / / +.75 +.7 5 +1.00 --- /
CNP**37 / / / / / / /
CNP**43 / / / / / / /
CAP**48 / / / +.75 +1.00 --- /
CNP**60 / / / / +1.00 --- ---
CSPH*60 / / / / +1 .00 --- ---
F(E,V)4(A,B,C)N(B,F)005 / / +.75 +.75 +1.00 --- /
F(E,V)4(A,B,C)NB006 / / / / +1.00 +2.2 +1.00
CAP**60 / / / / / +2.2 +1.00
CNP**61 / / / / / / /
/ = Comb. not allowed
--- = No charge adjust for ID
Outdoor Model Size
Table 2—Required Charge Adjustment for Indoor Coil Model -- AC
Furnace or Fan Coil Model Number
CNPV*18** ---
CAP**18** ---
13 24B 25 36 37 48 49 60
/ / / / / / /
/ / / / / / /
CNP**24 --- --- ---
CNPV*19** ---
/ / / / / / /
CAP**24 --- --- ---
CSPH*24 --- --- ---
CSPH* 30**
/
--- ---
F(E,V)4(A,B,C)NF002 +0.19 --- --- ---
CAP**30
CNP**30
CNP**36
F(E,V)4(A,B,C)N(B,F)003
CAP**36
CNP**42
CAP**42
CSPH*36
CSPH* 42**
CNP**31* *
CNP**48
CSPH* 48**
CNP**37
CNP**43
CAP**48
CNP**60
CSPH*60
F(E,V)4(A,B,C)N(B,F)005
F(E,V)4(A,B,C)NB006
CAP**60
CNP**61
/ = Comb. not allowed
--- = No charge adjust for ID
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/ / /
/ / / /
/ / / /
/
/ / /
/ / / / /
/ / / / /
--- ---
--- ---
--- --- --- ---
--- --- --- ---
--- +.50 --- ---
+.50 +.50 --- +.75
+.50 +.50 --- +.75
+.50 +.50 --- +.75
+.50 +.50 +.75 +.75
+.50 +1.25 +.75 +.75
+.50 +1.25 +.75 +.75 --- ---
+.625 +1.25 +.75 +1.00 --- ---
+.625 +1.25 +.75 +1.00 --- ---
+.625 +1.25 +.75 +1.00 --- ---
+.625 +1.25 +.75 +1.00 --- +0.125
Outdoor Model Size
/ / / / /
/ / / / /
/ / / / /
/ / / / /
/ / / /
/ / / / /
/ / / / /
/ / /
/ / /
/ / /
/ / /
/ / /
/ / /
/ / /
/ / /
+.75 +1.00 --- ---
+1.00 --- +0.125 ---
+1.00 --- +0.125 ---
+.75 +1.00 +1.5 +.625 +1.00
+1.5 +.625 +1.00
+1.5 +.625 +1.00
/
/
/
/
/
/
10
Fig. 12 – Charging in Cooling Mode 288BNV013
Fig. 16 – Charging in Cooling Mode 288BNV037
Fig. 13 – Charging in Cooling Mode 288BNV024
Fig. 14 – Charging in Cooling Mode 288BNV025
Fig. 15 – Charging in Cooling Mode 288BNV036
Fig. 17 – Charging in Cooling Mode 288BNV048
Fig. 18 – Charging in Cooling Mode 288BNV060
11
Fig. 19 – Charging in Cooling Mode 189BNV013
Fig. 23 – Charging in Cooling Mode 189BNV037
Fig. 20 – Charging in Cooling Mode 189BNV024B
Fig. 21 – Charging in Cooling Mode 189BNV025
Fig. 24 – Charging in Cooling Mode 189BNV048
Fig. 25 – Charging in Cooling Mode 189BNV049
Fig. 22 – Charging in Cooling Mode 189BNV036
Fig. 26 – Charging in Cooling Mode 189BNV060
12
Heating Check Chart Procedure (See Fig.27 -- 33)
(Communicating / Non--communicating Systems)
In heating mode, the required charging method is by weigh--in. On
new installations or complete recharge, refer to the unit 0 and
indoor fan coil / furnace coil per Table 1 for additional charge
needed. Refrigerant charge adjustment amount for adding or
removing 0.6 oz/ft (17.74 g/m) of 3/8 liquid line above or below
15ft (4.57 m) respectively.
Use the Defrost CHECKOUT mode to remove ice or frost from
coil, if present, prior to checking the heating pressures.
To use the Heating Check Chart, the user interface (UI) must be in
Refrigerant Charging mode selected from the Installation and
Service screen. The Charging Mode Selection screen will show
selections for Weigh-- In Charge Method or Heating Check Charge
Method. Select Heating Check Charge Method. The Heating
Check Charge method will only be displayed if the conditions are
right for checking the charge in heating mode. When Heating
Check Charge Method is selected, the system will operate by
running in stage 5 with appropriate outdoor fan speed and indoor
airflow. Upon completion of a countdown period for system
stabilization, check refrigerant pressures for the appropriate
ambient temperatures shown in Fig. 27 through 33 based the OD
unit size.
To use the Heating Check Chart in non--communicating systems,
operate system at Y1+Y2–high stage. These charts indicate
whether a correct relationship exists between system operating
pressure and air temperature entering indoor and outdoor units. If
pressure and temperature do not match on chart, system refrigerant
charge may not be correct. DO NOT USE CHART TO ADJUST
REFRIGERANT CHARGE.
NOTE: High pressure is at vapor service valve. Add 12 psig if
high pressure is taken from liquid service valve.
NOTE: When charging is necessary during heating season, charge
must be weighed in accordance with unit rating plate,
(
±17.74 g/m). of 3/8--in. liquid--line above or below 15 ft (4.57
m), respectively.
±0.6 oz./ft
Fig. 29 – Heating Pressure Check Chart 288BNV025
Fig. 30 – Heating Pressure Check Chart 288BNV036
Fig. 27 – Heating Pressure Check Chart 288BNV013
Fig. 28 – Heating Pressure Check Chart 288BNV024
Fig. 31 – Heating Pressure Check Chart 288BNV037
Fig. 32 – Heating Pressure Check Chart 288BNV048
Fig. 33 – Heating Pressure Check Chart 288BNV060
13
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