System Start-Up And Refrigerant Charging - Fujitsu FO2416RTJNAA Installation Instructions Manual

R-410a heat pump outdoor units, 16 seer two-stage non-communicating heat pump
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5.0 SYSTEM START-UP & REFRIGERANT CHARGING
5.4 Refrigerant Charging
The refrigerant charge for all systems should be
the access panel cover.
WARNING:
compressor shell is hot. Touching the compressor
top may result in serious personal injury.
CAUTION:
approximately 60% higher (1.6 times) than R-22
refrigerant. Failure to exercise care may result in
equipment damage or personal injury.
the Charging Chart inside the access panel cover.
IMPORTANT:
(liquid and discharge).
NOTICE:
System maintenance is to be
performed by a qualified and certified technician.
The optimum refrigerant charge for any outdoor
affected by the application. Therefore, charging
data has been developed to assist the field
technician in optimizing the charge for all mounting
LH – Left-Hand Discharge, and RH – Right-Hand
Discharge). Refer to the charging chart inside the
access panel cover on the unit and choose the
appropriate column for the specific application
utilizing either an RCF indoor coil installed on a
gas furnace or an (-)H series air handler in the
require removal of refrigerant since the factory
charge could result in an overcharge condition.
IMPORTANT:
the 2nd stage mode.
in the cooling and heating mode. All steps listed
should be performed to ensure proper charge has
been set. For measuring pressures, the service
valve port on the liquid valve (small valve) and the
valves are to be used.
The top of the scroll
R-410A pressures are
Do not operate the
Refrigerant charging
5.4.1 Measurement Device
Set-Up
1. With an R-410A gauge set, attach the high-
pressure hose to the access fitting on the liquid
line (small) service valve at the OD unit.
2.
valves that is connected to the suction tube
of the outside of the unit on the copper liquid line
(small line). For more accurate measurements,
clean the copper line prior to measurement and
use a calibrated clamp-on temperature probe or
an insulated surface thermocouple.
5.4.2 Preliminary Charging by
Weight
NOTICE:
Adjust the system charge by
connecting tubing and indoor coil is adequate;
Data" in Section 3.3 of these instructions or on the
unit data plate. Note that the charge value includes
charge required for 15 ft. [4.6 m] of standard-size
liquid line without a filter drier.
Calculate actual charge required with the actual
installed liquid line size and length using:
1/4" [6.4 mm] O.D. = .3 oz./ft. [28.3 g/m]
5/16" [7.9 mm] O.D. = .4 oz./ft. [37.7 g/m]
3/8" [9.5 mm] O.D. = .6 oz./ft. [56.7 g/m]
1/2" [12.7 mm] O.D. = 1.2 oz./ft. [113.3 g/m]
Add 6 oz. for field-installed filter drier.
Charge Adjustment = (Line Set (oz./ft.) × Total
Linear Length) – Factory Charge for Line Set +
6 oz. (for field installed filter drier)
Example: A three-ton heat pump unit requires 75
Factory Charge for Line Set = 15 ft. × .6 oz. = 9 oz.
.
27

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