Refrigerant Charge - Carrier 48PG03-16 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

Refrigerant Charge

Amount of refrigerant charge is listed on unit nameplate. Refer to
Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and
Reclamation section for charging methods and procedures. Unit
panels must be in place when unit is operating during charging
procedure.
Puron® (R-410A) refrigerant systems should be charged with
liquid refrigerant. Use a commercial type metering device in the
manifold hose.
WARNING
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puron (R- -410a) refrigerant systems operate at higher
pressures than standard R- -22 systems. Do not use R- -22
service equipment or components on Puron refrigerant
equipment. Gauge set, hoses, and recovery system must
be designed to handle Puron refrigerant.
about equipment, consult the equipment manufacturer.
NOTE:
Do not use recycled refrigerant as it may contain
contaminants.
No Charge
Use standard evacuating techniques. After evacuating system,
weigh in the specified amount of refrigerant (refer to unit
nameplate).
NOTE: System charge for units with Humidi-MiZer™ system is
greater than the system charge of the standard unit.
Low Charge Cooling
Using cooling charging chart (see Fig. 47-55), add or remove
refrigerant until conditions of the chart are met. An accurate
pressure gauge and temperature-sensing device is required.
Charging is accomplished by ensuring the proper amount of
liquid subcooling. Connect pressure gauge to the compressor
discharge service valve. Connect temperature sensing device to
the liquid line between the condenser and the TXV (thermostatic
expansion valve), and insulate it so that ambient temperature does
not affect reading.
To Use the Cooling Charging Chart, Standard Unit
NOTE: All circuits must be running in normal cooling mode.
Indoor airflow must be within specified air quantity limits for
cooling. (See Table 79.) All outdoor fans must be on and
running at high speed. Use the Cooling Service Test Outdoor Fan
Override function to start all outdoor fans.
If unsure
116
R410A REFRIGERA R410A REFRIGERANT
OUTDOOR OUTDOOR FAN FAN MUST MUST BE BE OPERATING OPERATING ON
160 160
140 140
Add dd Charge Charge if if Above bove the the Curve Curve
120 120
100 100
80 80
Remove Remo ve Charge Charge if if Below
60 60
40 40
20 20
150 150 200 200 250 250 300 300 350 350 400 400
Comp Compressor ressor Disch Discharge arge Pressu Pressure,
Fig. 47 --- Charging Chart — 48/50PG03
R4 R410A RE REFRI RIGERANT
OUTDOOR F R FAN M N M UST BE OPERATING ON H
160 16
14 140
12 120 Add Cha harge ge if Abov bove the the Cur urve
100 10
80 80
Rem ove Charge if Be Re
60 60
40 40
20 20
150 150 200 200 250 250 300 300 350 350 400 400
Compre ss ssor Disc isc ha rge P re ss
Fig. 48 --- Charging Chart — 48/50PG04
NT
ON HIGH HIGH SPEED SPEED
Below the the Curve Curve
450 450 500 500 550 550 600 600
re, [p [psig sig]
C07038
RANT
N HIGH S H SPEED
Below the Curve
450 450 500 500 550 550 600 600
ssure , [psig sig]
C07039