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SS-SVN016A-EN
Wiring Requirements
Thermostat Control Wire
Table 1. Recommended thermostat control wire size
Wire Gauge Maximum Wire Length
22 30 feet
20 50 feet
18 75 feet
16 125 feet
14 200 feet
Zone Sensor Wire
Table 2. Zone sensor module wiring
Distance from Unit to Control Recommended Wire Size
0–150 feet (0–45.7 meters) 22 gauge (0.33 mm
2
)
151–240 feet (46–73.1 meters) 20 gauge (0.5 mm
2
)
Shielded Twisted Pair Cable
A shielded twisted pair cable is required for Symbio condenser installations where the indoor air
handler is variable speed supply fan (VFD) and/or electric heat. See Air Handler and Condenser
pairing information for more details regarding shield twisted pair cable installation requirements.
Trane Purple Wire is recommended when shielded twist pair cable is required (see the following
table).
Part Number
Description
CAB01568
Cable, comlink cable with PVC jacket, 18/1 pr, stranded shield, 25PF plenum, 100 foot
length
CAB01569
Cable, comlink cable with PVC jacket, 18/1 pr, stranded shield, 25PF plenum, 1,000 foot
length
Alternate shield twisted pair cable can be used if it conforms to the following physical
characteristics:
• Twisted pair (two-conductor) plus shield
• Characteristic impedance: 100 and 130 ohms
• Distributed capacitance between conductors: < 100 pF/m
• Distributed capacitance between conductor and shield: < 200 pF/m
• Foil or braided shield is acceptable
• Wire diameter: 22 to 18 AWG
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