158
RT-SVX073A-EN
Table 60. eFlex™ staging sequence and compressor data (continued)
130 Ton eFlex™ Variable Speed Compressor Standard Capacity Evaporator
Stage
1A: VZH 170 1B: CSHL 346 2A: CSHL 227 2B: CSHL 227 2C: CSHL 227
VZH Min Speed VZH Max Speed
1 X 3600 6000
2 X X 1500 6000
3 X X X 2160 4560
4 X X X 1500 6000
5 X X X X 1500 6000
6 X X X X X 1500 4620
130 Ton eFlex™ Variable Speed Compressor High Capacity Evaporator
Stage
1A: VZH 170 1B: CSHL 346 2A: CSHL 227 2B: CSHL 227 2C: CSHL 227
VZH Min Speed VZH Max Speed
1 X 3780 6000
2 X X 2640 6000
3 X X X 2160 4560
4 X X X 1500 6000
5 X X X X 1500 6000
6 X X X X X 1500 4740
150 Ton eFlex™ Variable Speed Compressor Standard Capacity Evaporator
Stage
1A: VZH 170 1B: CSHL 346 2A: CSHL 227 2B: CSHL 169 2C: CSHL 346
VZH Min Speed VZH Max Speed
1 X 4080 6000
2 X X 2700 5340
3 X X 3720 6000
4 X X X 2820 5640
5 X X X 1500 5040
6 X X X 1500 5580
7 X X X X 1500 6000
8 X X X X X 1500 6000
Expansion Valves
All Intellipak 2 with Symbio systems use electronic
expansion valves (EXVs) to control superheat. These
valves are factory set to 12°F of superheat to balance
efficiency and compressor reliability at all operating
conditions. This setting can be adjusted through the
Symbio controller display, but this is only recommended to
be done at the discretion of Trane Product Support.
Pressure curves included in this document are based on
outdoor ambient between 65° & 105°F, relative humidity
above 40 percent. Measuring the operating pressures can
be meaningless outside of these ranges.
Measuring Superheat
1. Measure the suction pressure at the suction line gauge
access port located near the compressor, or use the
Suction Pressure reading from the Symbio controller.
2. Using a Refrigerant/Temperature chart, convert the
pressure reading to a corresponding saturated vapor
temperature.
3. Measure the suction line temperature as close to the
suction line temp sensor as possible, or use the Suction
Temperature reading in Symbio. Use a thermocouple
type probe for an accurate reading.
4. Subtract the saturated vapor temperature obtained in
step 2 from the actual suction line temperature
obtained in step 3. The difference between the two
temperatures is known as “superheat”.
When adjusting superheat, recheck the system subcooling
before shutting the system “Off”.
Note: If unit includes the modulating reheat
dehumidification option, adjust superheat only in the
cooling mode of operation.
Unit Startup
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