Russell LRXH 15 User Manual
Refrigerant Heat Exchangers are designed to transfer heat from the liquid refrigerant entering
the evaporator to the refrigerant vapor returning back to the compressor. This process may
be desirable for the following reasons:
(a) To subcool the liquid to prevent flash gas entering the TXV.
(b) To evaporate any remaining liquid in the suction line.
MAXIMUM CAPACITIES - MBH (X 1000 BTUH)
HEAT SATURATED SUCTION TEMPERATURE
EXCH. -400 F -200 F +100 F +250 F
MODEL R-404A/R-22 R-404A/R-22 R-404A R-22 R-404A R-22
RXH 25 2.6 3.4 6.0 4.3 6.8 5.1
RXH 50 4.5 6.0 11.9 9.4 13.6 11.0
RXH 75 7.0 9.4 17.8 13.6 21.3 16.2
RXH 100 9.6 12.8 24.7 18.7 28.1 22.1
RXH 150 14.0 18.7 36.6 27.2 42.5 32.3
RXH 250 23.0 30.6 59.5 45.9 69.7 54.4
RXH 350 34.4 45.9 90.1 68.0 102.0 81.6
RXH 500 47.2 62.9 120.7 91.8 141.1 108.8
LRXH 15 70.1 93.5 182.8 136.0 204.0 161.5
LRXH 20 92.4 123.3 238.0 174.3 272.0 212.5
LRXH 25 108.4 144.5 289.0 221.0 348.5 255.0
LRXH 30 140.3 187.0 348.5 272.0 399.5 323.0
SELECTION PROCEDURE:
1. Determine the refrigeration system capacity in MBH (X1000 BTUH).
2. From the capacity table, go to the appropriate column for refrigerant type and saturated suction temperature.
From this column, select the Heat Exchanger model based on the system requirements.
DO
NOT UNDER SIZE HEAT EXCHANGER!
If the system requirements exceed the rating of the Heat Exchanger, use the next larger size.
3. For multiple evaporator systems, see the following example.
4. For suction temperatures not listed, interpolate ratings.
Refrigerant
Heat Exchangers
Technical Bulletin No. 203.3
May 1997
RXH
EXAMPLE 1: System Model DCD6L44 - AE46-164(2); 6 H.P., R-404A,
-20 Sat. Suct. Temp., 31,100 BTUH, 2 Unit Coolers.
SOLUTION: Divide the system capacity by the number of unit coolers.
31,100 / 2 = 15,550 BTUH = 15.55 MBH each Unit Cooler.
Select 2 Heat Exchangers based on 15.55 MBH each.
Selection - 2 each RXH 150 from R-404A column.
EXAMPLE 2: System Model DCD5H22 - UAH2-433; 5 H.P.,R-22
+25 Sat. Suct. Temp.,51,700 BTUH, 1 Unit Cooler.
SOLUTION: 51,700 BTUH = 51.7 MBH.
Select RXH 250 from R-22 column.
221 S. Berry St., P.O. Box 1030 Brea, CA, 92822-1030, USA Tel (714)529-1935 Fax (714)529-7203
Loading...