Installation Manual

Terminal descriptions
Note: If you have only one R wire, connect to RC.
Note: If you are removing an existing thermostat, remove any jumper wires between R and
RH or RC and RH. You will not need these for GLAS.
Y1 First stage of cooling or rst stage heat pump
Y2 Second stage of cooling or second stage heat pump
W1 First stage of conventional heating or rst stage auxiliary heat for heat pump systems
W2 Second stage of conventional heating or second stage of auxiliary heat for heat
pump systems
G Fan
4
GLAS smart thermostat installation instructions -
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2018 Johnson Controls