Fieldpiece HG3 - Wireless HVAC Guide System Analyzer - Manual (Page 15)

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3.1
Subcooling Overview
Subcooling is the temperature decrease below the saturation tempera-
ture (same as the condensing point) in the condenser. Too high, and refriger-
ant condenses too early in the condenser and ‘wastes’ most of the capacity of
the condenser. Too low, and a mixture of gas and liquid can be delivered to
the expansion valve, reducing efficiency.
In a properly working TXV/EXV system, the superheat is held constant.
This is why subcooling is the best way to obtain proper refrigerant charge for
a TXV/EXV system. If the air conditioner is in good working order and the
airflow is adjusted properly, comparing the actual and target subcooling will
tell you if refrigerant needs to be added or recovered (ensure the pressure
never exceeds the manufacturer's maximum overload pressure guidelines).
Make sure the TXV/EXV bulb is installed properly, there is proper re-
frigerant to obtain target subcooling, and there are no liquid line restrictions.
The Actual SC (subcooling) should be within ±3°F of the Target SC
for correct refrigerant charge.
For Actual Subcooling, you need to measure liquid line pressure and liq-
uid line temperature. Target Subcooling is usually specified by the manufac-
turer and if not the HG3 uses conservative Target Subcooling tables.
Adding refrigerant increases your Actual SC . Recovering refrigerant
decreases your
Actual SC
. The amount of refrigerant necessary to add or
recover will vary based on the size of the system and the difference between
the Actual and Target SC.
Because everything is interdependent, changes in one part of the system
affect other parts of the system. For example, increasing airflow decreases the
subcooling, which may require adding refrigerant. After modifications, allow
15 minutes for the system to stabilize; and then retest.
Use the HG3, ASX14, and ATC1
to measure Actual Subcooling.
Refrigeration Cycle
EVAPORATOR
CONDENSER
THROTTLE
VALVE
COMPRESSOR
REFRIGERANT
FLOW
H
ig
h P
ress
ure Side
Low Press
ure
Sid
e
RETURN AIR SUPPLY AIR
OUTDOOR AIR HOT AIR
AA V3
Air Velocity & T
emper
atur
e
Accessor
y
Head
ON
LCD X100 LO BA TT READ ENGLISH
ENG LISH METRIC Ft/min MPH °F M/s KM/hr
°C
METRIC AV G NORMAL
ATH4
AUT O O FF
ARH4
T1-T2
T2 T1 Function
T1 CAL
T2 CAL
AUT O OFF
°C
°F
T1
T2
Set meter to mVDC range to display temperature
directly
. LO BA TT ON
Dual Temper
atur
e
Head
OFF
ATH4
T1-T2
T2 T1 Function
T1 CAL
T2 CAL
AUT O OFF
°C
Set meter to mVDC range to display temperature dir
ectly . LO BA TT
ON
Dual Temper
atur
e
Head
OFF
ASX14
ACH4
Sync
ET2W
Air Conditioner Superhea
t and
Subcooling
AUT O OFF
T/C CAL
ATH4
T1-T2
T2 T1 Function
T1 CAL
T2 CAL
AUT O OFF
°C
°F
T1
T2
Set meter to mVDC range to display temperatu
re directly
. LO BA TT
ON
Dual Temper
atur
e
Head
OFF
SET AT M
ST ABLE
ON LO BA TT
MAX 30VD
C 24VAC CONNECT ONLY
TO
ACCESSORY
HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VD
C 24VAC CONNECT ONLY TO ACCESSORY HEAD
!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VD
C 24VAC CONNECT ONLY TO ACCESSORY HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT
ONLY TO
ACCESSORY HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT
ONLY TO
ACCESSO
RY HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY
TO
ACCESSORY
HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY
HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sling Psy chr ome ter
Head
ON
AUT O OFF
1%RH/mVDC 1°F/mVDC 1°C/mVDC
LO BA TT DEW
POINT %RH
WET B
ULB TEMP °F
°C
ON
OFF
ACM3
AOX
2
Sync
ET2W
MAX 30VDC 24VAC CONNECT
ONLY TO
ACCESSORY HE
AD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY
HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSOR
Y HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSOR
Y HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmi
tter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSOR
Y HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Sync
ET2W
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSOR
Y HEAD!
LO BA TT
SEND
RECEIVE ON
AC DC
W ireless Tr ansmitter
Carbon Mono
xide Accessor
y
Head
ON Converts 1PPM CO concentration to 1mVDC LO BA TT ON
OFF AVERA
GE NORMAL
AUT O OFF
ZERO SET
CA T .III
300V 400A
CLAM P
AC Cur
rent
Clamp 1AAC / 1mV
AC
400AAC MAX
!
Combustion Chec
k
% O
% CO
TEMP
ON
GAS
OIL
Lo Batt
°C °F
AUT O OFF
ST ABLE
Fuel T
ype 2 2
T/C CAL
ARH4
Sling Psy
chr omete
r
Head
ON
AUT O OFF
1%RH/mVDC 1°F/mVDC 1°C/mVDC
LO BA TT DEW POINT
%RH
WET B
ULB TEMP
°F
°C
ON
OFF
ATH4
T1-T2
T2 T1 Function
T1 CAL
T2 CAL
AUT O OFF
°C
°F
T1
T2
Set meter to mVDC range to dis
play
temperature dir
ectly . LO BA TT
ON
Dual Temper
atur
e
Head
OFF
AA V3
Air V
elocity & Temper
atur
e
Accessor
y
Head
ON
LCD X100 LO BA TT READ ENGLISH
ENG LISH METRIC Ft/min MPH °F M/s KM/hr
°C
METRIC AV G NORMAL
AUT O OFF
AOX 2
Combustion Chec
k
% O
% CO
TEMP
ON
GAS
OIL
Lo Batt
°C °F
AUT O OFF
ST ABLE
Fuel T
ype 2 2
T/C CAL
ACM3
Carbon Mono
xide Accessor
y
Head
ON Converts 1PPM CO concentration to 1mVDC LO BA TT ON
OFF AVERA
GE NORMAL
AUT O OFF
ZERO SET
ACH4
CA T .III
300V 400A
CLAM P
AC Cur
rent
Clamp 1AAC / 1mV
AC
400AAC MAX
!
ASX14
Air Conditioner Superhea
t and
Subcooling
AUT O OFF
T/C CAL
SET AT M
ST ABLE
ON LO BA TT
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Jacket Charging
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Light
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Service
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Light
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Service
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger Exit Temp
CFM
Display
Superheat Subcooling Combustion
CheckMe!
Data
Clear
Input Output Sync
Recall
Enter
Save
MAX 30VDC 24VAC CONNECT ONLY TO ACCESSORY HEADS!
HVAC Guide
Fieldpiece HG3
SETUP Target Evaporator
Logger
Exit Temp
CFM
Display
Superheat
Subcooling Combustion
CheckMe!
Data
Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging
Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging Jacket Charging
OUTPUT FORM CO2: 6.3% Excess O2: 76.8% COAF: 103ppm Net Temp: 82 ˙F Standard Eff: 85% Siegert Eff: 94% Draft Press: 0.08IWC
INPUT FORM Pressure is between 160psig and 220psig. SL Pressure: ---.-psig LL Pressure: ---.-psig Difference: ---.-psig Confirm Pressures CustomerID: __JONES123
INPUT FORM SH Table:Standard Refrigerant:R-22 OD Dry Bulb: 85.4˙F Return WB: 61.0˙F SL Pressure : ---.-˙F SL Temp: --.-˙F CustomerID:__JONES123
INPUT FORM Into Evap Return DB : 72.1˙F Return WB: 64.5˙F Out of Evap Supply DB: 55.6˙F CustomerID: __JONES123 Units:English
INPUT FORM Span: 2hours Per: 30seconds SEY SET ID:IndoorTemp Measurement: 72.8 SET ID:CompAmps Measurement: 17.2
INPUT FORM ACV
CustomerID :--JONES123 01/24/2000 04:20:22PM
OUTPUT FORM CO2: 6.3% Excess O2: 76.8% COAF: 103ppm Net Temp: 82 ˙F Standard Eff: 85% Siegert Eff: 94% Draft Press: 0.08IWC
INPUT FORM W/O Manufacturer’s Data Refrigerant: R-22 LL Pressure: 220.3psig LL Temp : 91.1˙F CustomerID:__JONES123 Units:English 12/31/2011 11:59:59PM
INPUT FORM W/O Manufacturer’s Data Refrigerant: R-22 LL Pressure: 220.3psig LL Temp : 91.1˙F CustomerID:__JONES123 Units:English 12/31/2011 11:59:59PM
INPUT FORM Into Evap Return DB: 72.1˙F Return WB: 64.5˙F Out of Evap Supply DB : 55.6˙F CustomerID: __JONES123 Units:English
INPUT FORM Refrigerant:R-410A Constrict the Charging Jacket until the difference between the SL Pressure and LL Pressure is between
INPUT FORM SH Table:Standard Refrigerant:R-22 OD Dry Bulb: 85.4˙F Return WB: 61.0˙F SL Pressure : ---.-˙F SL Temp: --.-˙F CustomerID:__JONES123
INPUT FORM Sys Type :AC Grant and Sys Info: None INDOOR UNIT Meter Device:TXV/TEV Return DB: 71.7˙F Return WB: 60.8˙F
INPUT FORM Sys Type :AC Grant and Sys Info: None INDOOR UNIT Meter Device:TXV/TEV Return DB: 71.7˙F Return WB: 60.8˙F
Memory: Com with PC Erase a Single Test Erase a Customer Erase a Grant Check Memory Status Clear Data logs Clear All Data
Memory: Com with PC Erase a Single Test Erase a Customer Erase a Grant Check Memory Status Clear Data logs Clear All Data
INPUT FORM SET ID:IndoorTemp Measurement: 72.8 SET ID:CompAmps Measurement: 17.2 Span: 2hours Per: 30seconds START
INPUT FORM DCV
CustomerID :--JONES123 01/24/2000 04:20:22PM
INPUT FORM Grille 01 ID:LivingRm1 Flow:Supply Manufacturer’s Data Free Area in sqft: 00.421sqft Velocity : 212ft/min
INPUT FORM Grille 01 ID:LivingRm1 Flow:Supply Manufacturer’s Data Free Area in sqft: 00.421sqft Velocity : 212ft/min
INPUT FORM Into Evap Return DB: 72.1˙F Return WB: 64.5˙F Out of Evap Supply DB: 55.6˙F CustomerID : __JONES123 Units:English
ARH4
Sling Psychrometer Head ON
AUTO OFF
1%RH/mVDC 1°F/mVDC 1°C/mVDC
LO BATT
DEW POINT %RH
WET BULB TEMP
°F
°C
ON
OFF
ATH4
T1-T2 T2
T1
Function
T1 CAL T2 CAL AUTO OFF
°C
°F
T1 T2
Set meter to mVDC range to display temperature directly.
LO BATT
ON Dual Temperature Head
OFF
ATH4
T1-T2 T2
T1
Function
T1 CAL T2 CAL AUTO OFF
°C
°F
T1 T2
Set meter to mVDC range to display temperature directly.
LO BATT
ON Dual Temperature Head
OFF
AAV3
Air Velocity & Temperature Accessory Head
ON LCD X100
LO BATT READ
ENGLISH
ENGLISH METRIC
Ft/min
MPH °F M/s KM/hr °C
METRIC
AVG
NORMAL
AUTO OFF
AOX2
Combustion Check
% O % CO TEMP
ON
GAS
OIL
Lo Batt
°C °F AUTO OFF
STABLE
Fuel Type
2
2
T/C CAL
ACM3
Carbon Monoxide Accessory Head
ON
Converts 1PPM CO concentration to 1mVDC
LO BATT
ON
OFF
AVERAGE
NORMAL
AUTO OFF ZERO SET
ACH4
CAT.III 300V
400A CLAMP
AC Current Clamp
1AAC / 1mVAC 400AAC MAX
!
ASX14
Air Conditioner Superheat and Subcooling
AUTO OFF T/C CAL SET ATM
STABLE ON
LO BATT