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Table 10: Approximate Refrigerant Charge per Circuit
*Condenser pumpdown capacity is based on volume between condenser
entrance and liquid line solenoid at 90°F, 90% full
Table 11: Approximate Refrigerant Charge per Circuit
*DX coil configuration (S = Standard, L = Large) is identified by the 8th digit of the RPS/RDT or RFS model number, found on the unit nameplate. For example,
DX = L for unit model number RFSO6OCLY.
**Condenser pumpdown capacity is based on volume between condenser entrance and liquid line solenoid at 90º F, 90% full.
Table 12: Weight of refrigerant R-22 in copper lines (pounds per 100 feet of Type L tubing)
CAUTION
On systems with optional hot gas bypass, it is important
that the bypass solenoid valve be located on the RCS
and not on the RFS unit to prevent liquid return and
damage to the compressor.
CAUTION
Before replacing refrigerant sensors or safeties, see
“Refrigerant Charge” on page 96 for an important
warning to prevent an abrupt loss of the entire charge.
CAUTION
To service liquid line components, the manual shutoff
valve is closed and refrigerant is pumped into the
condenser. The pounds of refrigerant in the system
may exceed the capacity of the condenser, depending
on the amount of refrigerant in the liquid lines between
the RFS and RCS units. Suitable means of containing
the refrigerant is required.
Unit Size
Base R-22 Charge
Lb. Per Circuit
(Less DX Coil)
EVAP.
COIL
(LBS/CKT/
COIL ROW)
Additional Charge
for Heat Section
Additional Length
COND.
PUMPDOWN
CAPACITY
*
(LBS. R-22)
Circuit 1 Circuit 2 Circuit 1 Circuit 2
015C 11 18 3.3 .5 1 52.0
020C 11 18 3.3 1 1 52.0
025C 23 22 4.9 1 1 73.6
030C 23 21 4.9 1 1 73.6
036C 32 32 4.9 1 1 81.7
040C 33 32 2.5 1 1 50.9
Unit Size
Base R-22 Charge
Lb. Per Circuit (Less DX Coil)
DX Coil R-22 Charge — Lb. per Circuit
Condenser Pumpdown
Capacity** (Lb. R-22)
RPS RDT
DX=S* DX=L*
Circuit #1 Circuit #2 Circuit #1 Circuit #2
045C 34 33 34 28 3 x No. of DX rows — 47
050C 34 33 35 34 3 x No. of DX rows 3-1/2 x No. of DX rows 49
060C 35 34 35 34 3 x No. of DX rows 3-1/2 x No. of DX rows 49
070C 39 39 40 40 3 x No. of DX rows 3-1/2 x No. of DX rows 67
075C 39 39 40 40 3 x No. of DX rows 3-1/2 x No. of DX rows 67
O.D. LINE SIZE
VOL. PER 100 FT.
IN CUBIC FEET
WEIGHT OF REFRIGERANT, LBS./100 FEET
LIQUID @100°F
HOT GAS
@120°F COND.
SUCTION GAS (SUPERHEAT TO 85°F)
30°F
40°F
3/8" 0.054 3.84 0.202 0.052 0.077
1/2" 0.100 7.12 0.374 0.098 0.143
5/8" 0.162 7.12 0.605 0.158 0.232
7/8" 0.336 24.00 1.260 0.323 0.480
1-1/8" 0.573 40.80 2.140 0.550 0.820
1-3/8" 0.872 62.10 3.260 0.839 1.250
1-5/8" 1.237 88.00 4.620 1.190 1.770
2-1/8" 2.147 153.00 8.040 2.060 3.060
2-5/8" 3.312 236.00 12,400 3.180 4.720
3-1/8" 4.728 336.00 17.700 4.550 6.750
3-5/8” 6.398 456.00 24.000 6.150 9.140
4-1/8" 8.313 592.00 31.100 8.000 11.190
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