state the refrigerant is referred to as the saturated dew
temperature. When in the liquid state the refrigerant is
referred to as the saturated bubble temperature. Carlyle’s
06D and 06E compressor performance data with R-407C
is based on the compressor suction and discharge at the
saturated dew pressures. Because the compressor suc-
tion and discharge pressures will be at saturated dew
conditions this is our preferred method of presenting
this data. Compressor performance will be lower than
calculations based on “mean coil temperatures” which
may be used by other compressor manufacturers.
All R-502 capacity ratings, except for the 06DR109 com-
pressor, are based on the use of cylinder head cooling
fans at saturated suction temperatures of -20°F (-29°C)
or below, and -25°F (-32°C) or below for R-404A and
R-507. All low temperature (-30°F to 0°F, -34°C to
-18°C) R-22 capacity ratings are based on the use of a
cylinder head cooling fan. When the compressor is oper-
ated at higher return gas temperatures (for example
65°F, 18°C), the use of an external desuperheating valve
is also required to maintain discharge temperatures
below 275°F (135°C) and 250°F (121°C) for HFC/POE
applications. For R-22 low temperature applications,
bulletin 02T-3 should be carefully reviewed.
Total heat of rejection (THR) in tons from the compres-
sor equals adjusted compressor capacity (in tons) +
.285 x kW input (of the compressor motor), or the THR
in kilowatts equals the compressor’s capacity in kilowatts
+ kW input (of the compressor motor). This heat rejec-
tion calculation gives the maximum value possible for
condenser selection. Because of heat losses at the com-
pressor (especially is a cooling fan is moving air across
it) and at the discharge line, the actual heat of rejection
will be lower.
Unless otherwise specified on the compressor specifica-
tion and performance sheets, the 06D and 06E compres-
sors are suitable for continuous operation within the fol-
lowing limits:
Maximum operating conditions of the compressor mod-
els are generally defined in the performance curves and
differ with each model. Operating conditions should be
controlled so that the discharge gas does not exceed
275°F (135°C) and oil temperature (in the sump) does
not exceed 160°F (71°C). For HFC/POE applications the
maximum recommended discharge temperature is
250°F (121°C). The motors are thermally protected so
that unsafe winding temperatures are prevented. Oil
pressure switches are available for system protection
(see Accessories Section 5.3).
Requirements for Proper Compressor Operation
Semi-hermetic compressor application requires good
system design for proper compressor performance to
ensure against compressor damage.
LOW TEMPERATURE*
Refrigerant
Saturated
Suction
Temperature
Saturated
Condensing
Temperature
R-502,
R-404A, R-507
-40 to 0°F
(-40 to -18°C)
70 to 120°F
(21 to 49°C)
R-22
-30 to 0°F
(-34 to -18°C)
70 to 120°F
(21 to 49°C)
*Minimum operating pressure ratio in these applications is limited to 2.25:1.
MEDIUM TEMPERATURE
Refrigerant
Saturated
Suction
Temperature
Saturated
Condensing
Temperature
R-502,
R-404A, R-507
-10 to 40°F
(-23 to 4°C)
70 to 120°F
(21 to 49°C)
R-12*
-10 to 40°F
(-23 to 4°C)
80 to 130°F
(27 to 54°C)
*Minimum operating pressure ratio in these applications is limited to 2.25:1.
R-134a*
-10 to 50°F
(-23 to 10°C)
70 to 150°F
(21 to 66°C)
R-22*
0 to 50°F
(-18 to 10°C)
70 to 130°F
(21 to 54°C)
HIGH TEMPERATURE*
Refrigerant
Saturated
Suction
Temperature
Saturated
Condensing
Temperature
R-12
0 to 55°F
(-18 to 13°C)
70 to 150°F
(21 to 66°C)
R-134a
0 to 55°F
(-18 to 13°C)
70 to 150°F
(21 to 66°C)
*Minimum operating pressure ratio in these applications is limited to 2.25:1.
R-22
R-407C
0 to 50°F
(-18 to 10°C)
70 to 150°F
(21 to 66°C)
9
To Next Page
Loading...
Need help?
General
