Fieldpiece HG3 - Wireless HVAC Guide System Analyzer - Manual (Page 23)

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OUTDOOR UNIT
Refrigerant: Default: R-22. Other selection: R410A.
Rated Amps
(Rated Amperage of the Outdoor Unit) This can be found on
the nameplate along with the outdoor voltage and the refrigerant.
Target Subcool Manufacturer’s recommended subcooling for TXV/EXV
systems. This varies by manufacturer, and may also change depending
on weather conditions. Always charge to the equipment manufacturer’s
specifications when available. If no target subcooling is available then the
HVAC Guide will make a conservative estimate.
SL Pressure (Suction Line Pressure) Connect the ASX14 to the suction
side service port. Select pressure mode on the ASX14 head. The system
must be stabilized before taking the measurements. Enter data manually
if you want to get pressure from your gauges. The analysis is only as good
as the measurements. The Fieldpiece ASX14 has better resolution than
most gauge sets.
SL Temp (Suction Line Temperature) Measure near SL service port (within
6 inches). Use the ATC1 or ATC2 to get a good pipe temperature. The
clamp should be perpendicular to the pipe and should be securely seated
with the sensor in contact with the suction line. On a package unit make
sure you are at least 6 inches away from the compressor and not on the
hot gas discharge line.
LL Pressure
(Liquid Line Pressure) Connect the ASX14 to the liquid line
service port. Set the accessory head to measure pressure and ensure the
reading stabilizes before locking in the reading. Enter data manually if
you want to get pressure from your gauges. The analysis is only as good
as the measurements. The Fieldpiece ASX14 has better resolution than
most gauge sets.
LL Temp
(Liquid Line Temperature) Measure near the location that the LL
Pressure was taken. Use the ATC1 to get a good pipe temperature. The
clamp should be perpendicular to the pipe and should be securely seated
with the sensor in contact with the liquid line.
OD Dry Bulb (Outdoor Dry Bulb Temperature) Clip a calibrated ATA1
to the inlet of the condenser (typically on the side of the condenser), in
the shade if possible. Note that the temperature of the air entering the
outdoor coil can be considerably different than the ambient temperature
due to recirculation of air exiting the unit. Determine the average tem-
perature of the air entering the condenser.
Cond Amps Draw (Actual Condensing Unit Amp Draw) For a package
system this is the total amp draw of the unit. With a model HG3, use an
ACH4 amp clamp and take measurement automatically. To use another
amp clamp (such as the SC57) and for HG1s upgraded to an HG2, input
this measurement manually.
TrueFlow®
2
The TrueFlow® meter measures the airflow directly via a grid installed
in place of the filter (or other location that has all the indoor unit airflow
through it). For more information please visit www.energyconservatory.com.
TrueFlow®
Default: NO. If NO, skip ahead to the Customer ID. Answering
YES unlocks the inputs for this section.
Nom Ton
Nominal tonnage of the A/C system.
Grid Size Default: 14 inches. Other selection: 20 inches.
Sup Plen Pres
TrueFlow® system operating pressure with the filter in-
stalled and no TrueFlow® grid. This is the normal supply operating pres-
sure (NSOP) and is measured using the static pressure probe included
with the TrueFlow® plate.
Flow Pressure True Flow Supply Operating Pressure (TFSOP) using the
True Flow plate.
Sup Plen Pressure with Grid TrueFlow® operating pressure with the
filter and TrueFlow® grid installed. This is the TF SOP and is measured
using the static pressure probe included with the TrueFlow® plate.
2 TrueFlow® is the registered trademark of The Energy Conservatory.