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Safety Instructions
Please read these instructions carefully
BEFORE INSTALLING AND USING
the ST921WF Thermostat. This manual is meant to be used as a reference guide
for the installation, configuration and maintenance of your device.
•
Follow all regulations required by the local jurisdiction and electricity
supplier regarding the installation or replacement of a thermostat. An
authorized, qualified installer may be required.
• DO NOT CONNECT ANY TERMINALS TO 110 VAC or 220 VAC SUPPLY
VOLTAGE.
The ST921WF Thermostat uses a 24 VAC power source.
• DO NOT
expose the unit to voltage fluctuations of more than
±
10%.
• DO NOT
cover any of the vents on the thermostat.
• DO NOT
allow the unit to get wet. This device serves as a temperature
control system in dry, closed living and office spaces.
• DO NOT
place the thermostat in a bathroom or area of excessive moisture
where relative humidity exceeds 90%.
• DO NOT
expose the thermostat to temperatures below -4°F (-20°C) or above
122°F (60°C).
• DO NOT
install this unit in an altitude of over 6,500 feet (2,000 meters).
• DO NOT
use solvents or aggressive cleaning agents. A soft dry cloth
is recommended.
The manufacturer accepts no responsibility for any damage caused by
failure to follow these instructions.
Summary of Contents for ST921WF
Page 9: ...4 Wire Color Record HP NON HP Wire Color RC RC RH RH C G Y1 O B W1 L...
Page 20: ...15 Conventional Single Transformer Heat and Cool System...
Page 21: ...16 Conventional Two Transformer Heat and Cool System...
Page 22: ...17 Single Transformer Heat Pump System...
