26
SS-APG008H-EN
Table 3.
Component selection for TWA heat pump units 6–20 tons
Unit
TWA0724*A
TWA0724*D
TWA0904*A
TWA0904*D
TWA1204*A
TWA1204*D
TWA1804*D
TWA2404*D
Refrigerant ckts
1
2
1
2
1
2
2
2
Minimum step (tons)
6
3
5
3.75
6.7
6.7
7.5
10
GAS LINE
Tube diameter (in.)
Horizontal (& drops)
1 1/8
3/4
1 1/8
7/8
1-3/8
1 1/8
1 1/8
1 3/8
Vertical (up)
7/8
3/4
1 1/8
7/8
1 1/8
7/8
1 1/8
1 1/8
Access port 3/ckt
(a)
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
LIQUID LINE
Tube diameter (in.)
1/2
3/8
1/2
3/8
1/2
1/2
1/2
1/2
Filter drier
(b)
DHY01608
DHY01467
(Qty 2)
DHY01608
DHY01467
(Qty 2)
DHY01608
DHY01467
(Qty 2)
DHY01608
(Qty 2)
DHY01608
(Qty 2)
Sight glass 1/ckt
GLS00853
GLS00852
GLS00853
GLS00852
GLS00853
GLS00853
GLS00853
GLS00853
Access port 2/ckt
(a)
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Schraeder valve
w/core
Additional oil charge
0 oz
0 oz
0 oz
0 oz
0 oz
0 oz
0 oz
0 oz
Notes:
1
.
On Access ports 2/ or 3/ckt: Valve body VAL01483, valve core COR00006, valve cap CAP00072
2
.
On Filter drier: The heat pump products require two filters and two check valves: one set-oriented for liquid in the cooling direction, and one set-oriented for liquid in the
heating direction. For units with line lengths in excess of 80 ft, the included filters must be removed and filters from the table must be installed close to the air handler. See
“Liquid Filter Drier.".
3
.
Check valve selections: 3/8 - VAL08459, 1/2 - VAL08460, 5/8 - VAL01722, 7/8 - VAL07030. (see “Check Valves”)
Table 4.
Expansion valves for TTA/TWA applications 6–20 tons
Refrigerant
Manufacturer
Tonnage
Range
Model Number
Trane Part
Model Number w/
Check Valve
Trane Part
R-410A
Sporlan
2-3
RZE-2-GA
VAL09476
RCZE-2-GA
VAL08085
R-410A
Sporlan
3-4
RZE-3-GA
VAL09477
RCZE-3-GA
VAL08086
R-410A
Sporlan
4-5
RZE-4-GA
VAL09478
RCZE-4-GA
VAL08087
R-410A
Sporlan
5-6
RZE-5-GA
VAL09479
RCZE-5-GA
VAL08088
R-410A
Sporlan
6-8
RZE-6-GA
VAL09480
RCZE-6-GA
VAL08089
R-410A
Sporlan
8-11
RZE-8-GA
VAL09481
——————————-
———
————————-
—————
R-410A
Sporlan
11-14
RZE-12-1/2-GA
VAL09482
——————————-
———
————————-
—————
R-410A
Sporlan
14-17
RZE-15-GA
VAL09483
——————————-
———
————————-
—————
R-410A
Sporlan
17-23
OZE-20-GA
VAL09585
——————————-
———
————————-
—————
R-410A
Sporlan
23-28
OZE-25-GA
VAL09583
——————————-
———
————————-
—————
Notes:
1
.
See Expansion Valves
2
.
The RZE valves may also be called BBIZE.
3
.
The tonnage range is the maximum design tonnage for the system. The TXV is capable of additional turn down below the maximum capacity.
Contact your local Trane office for questions on TXV turndown. When sizing TXVs, select the TXV where the design tonnage is close to the
middle of the device.
