Advertisement
RHEAT CHARGING CHART
ED ON 400 CFM/TON INDOOR AIRFLOW AND
MIDITY, USE ON SYSTEMS THAT COOL WITH FCCV
EXAMPLE: SUCTION PRESSURE=65#. SUCTION TEMP=70˚F
WHICH GIVES AN ACTUAL SUPERHEAT OF 32˚F.
OD TEMP=90˚F➀ ID TEMP=80˚F➁
INTERSECTION OF ID AND OD TEMPS➂ OCCUR ON THE
12˚F SUPERHEAT LINE➃.
ADD CHARGE TO OBTAIN 12˚ SUPERHEAT.
3
LIMIT LINE
1
0
75
80
85
90
95
TDOOR TEMPERATURE ˚F
tion temperature at OD quick attach, ID & OD temps. Determine from
for the ID & OD temp. Example indicates 12˚ superheat. Determine
zed running conditions.
s OK
more than 5˚ below chart value remove refrigerant
G
e add refrigerant
if below 5˚ limit line, do not add refrigerant
G
1.
2.
100
105
110
115
3.
4.
Dwg. No. 4TWR2036-SF-1
WIRING DIAGRAM
TXV REFRIGERANT CHARGING CURVE
For charging outdoor units with R-410A refrigerant at above 65˚F
outdoor temperature in cooling mode and with indoor TXV.
600
550
REMOVE REFRIGERANT
500
450
400
350
300
250
200
70
80
LIQUID TEMPERATURE (˚F.)
Measure Liquid Line Temperature and
Refrigerant Pressure at service valves.
Determine total refrigerant pipe length
and height (lift) if indoor section is above
the condenser. Plot the intersection of
the two points on the Curve Selection
Chart to determine which curve to use.
Plot the pressure and temperature on
the TXV Charging Curve.
If the lines cross above the curve remove
refrigerant, if below curve add refrigerant.
ADD REFRIGERANT
90
100
110
120
5.
Whenever charge is removed
CHARGING CURVE SELECTION CHART
or added, the system must
be operated for a minimum
20 minutes to stabilize before
additional measurements can
be made.
6.
When system is correctly
charged refer to System
Performance Curves to verify
charge and performance.
TOTAL REFRIGERANT LINE LENGTH (FEET)
Page E-757-000
130
60
50
40
30
25
UPPER CURVE
20
15
MIDDLE CURVE
10
0
LOWER CURVE
10
20
25
30
40
60
80
A150999P05 REV. 0
Advertisement
