nest Learning thermostat Installation And Configuration Manual page 5

HVAC compatibility details HVAC compatibility details HVAC compatibility details HVAC compatibility details HVAC compatibility details
HVAC–system Nest works with 95% of 24V systems: gas, Nest works with 95% of 24V systems: gas,
compatibility electric, oil, forced air, heat pump & radiant. electric, oil, forced air, heat pump & radiant.
Heating: 1, 2 and 3 stages (W1, W2, W3) Heating: 1, 2 and 3 stages (W1, W2, W3)
Cooling: 1 and 2 stages (Y1, Y2) Cooling: 1 and 2 stages (Y1, Y2)
Heat pump: with auxiliary and emergency heat Heat pump: with auxiliary and emergency heat
(O/B, AUX, E) (O/B, AUX, E)
Fan (G) Fan (G)
Power (C, Rh, Rc) Power (C, Rh, Rc)
Humidifier or dehumidifier (HUM, DEHUM) Humidifier or dehumidifier (HUM, DEHUM)
Available Y1
connectors Y2
G
O/B
Rc
Networking Wi-Fi recommended. Required for remote Wi-Fi recommended. Required for remote
requirements control. control.
Wi-Fi 802.11 b/g/n, 2.4 GHz Wi-Fi 802.11 b/g/n, 2.4 GHz
Auto-pairing device to user accounts Auto-pairing device to user accounts
Wireless software updates Wireless software updates
Secure: AES-128 , SSL/TLS, WEP, WPA/WPA2 Secure: AES-128 , SSL/TLS, WEP, WPA/WPA2
* Nest may need a common wire if Nest can't get the voltage it needs from standard HVAC wiring without
interfering with normal HVAC operation. This occurs most often in certain zoned systems. Get more info in
the troubleshooting section, starting on page 28.
Nest Learning Thermostat installation & configuration guide
Nest Learning Thermostat Nest Learning Thermostat
2nd Generation 2nd Generation
W1
W2/AUX
C
* (E/W3/HUM/DHUM)
Rh
Nest Learning Thermostat Nest Learning Thermostat
1st Generation 1st Generation
24V HVAC 24V HVAC
conventional heating, one stage or two stage conventional heating, one stage or two stage
conventional cooling, one stage conventional cooling, one stage
gas, oil, electric, solar, geothermal systems gas, oil, electric, solar, geothermal systems
one-stage heat pump with auxiliary heat one-stage heat pump with auxiliary heat
zone systems with or without dampers zone systems with or without dampers
Rh
W1
Y1
G
Wi-Fi recommended. Required for remote Wi-Fi recommended. Required for remote
control. control.
Wi-Fi 802.11 b/g/n, 2.4 GHz Wi-Fi 802.11 b/g/n, 2.4 GHz
Auto-pairing device to user accounts Auto-pairing device to user accounts
Wireless software updates Wireless software updates
Secure: AES-128 , SSL/TLS, WEP, WPA/WPA2 Secure: AES-128 , SSL/TLS, WEP, WPA/WPA2
C
O/B
W2/AUX
Rc
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