10 BAS-SVX44C-EN
Pre-Installation
Maximum Wire Length
The thermostat may not function properly if the total resistance of any of the thermostat wires exceeds 2.5
ohms (refer to
Tab l e 2).
Ensure that the wires from the thermostat to the HVAC equipment do not exceed lengths shown in Table 2. Best practice:
use shorter wire lengths.
Table 2. Maximum wire lengths
Copper Wire size
Maximum Recommended Wire Length From
Thermostat to HVAC Equipment
Remote Temperature
Sensor to Thermostat
(Max
(a)
)
Remote Humidity Sensor to
Thermostat (Max
(a)
)
18 AWG (0.75 mm
2
) 385 ft (117 m) 2,500 ft (762 m) 385 ft (117 m)
20 AWG (0.50 mm
2
) 240 ft (73 m) 1,500 ft (457 m) 240 ft (73 m)
22 AWG (0.33 mm
2
) 150 ft (46 m) 1,000 ft (305 m) 150 ft (46 m)
(a) Temperature and humidity readings can be adjusted in the configuration setup for longer wire runs.
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