Install the batteries
Install three AA alkaline batteries (required) following the marked polarity in the
battery compartment. Put the lower battery in negative end first against the
spring, then push the positive end in. Then insert the last two batteries as shown
below.
Figure 7: Battery installation
Special battery warning
• Always replace the batteries as soon as the “Low Batt” flashes. The
thermostat is a battery-powered device. You must be responsible to replace
the batteries before they run out.
• Even if the “Low Batt” indicator does not flash, you should always replace the
batteries at least once a year. Replacing the batteries also helps to prevent
leakage that can corrode and damage the thermostat.
• if you are leaving your home for a month or more, you should replace the
batteries as a precaution against battery failure in your absence.
• Failing to replace the batteries, when necessary could cause the thermostat
to lose power or malfunction. If the thermostat loses power, then the
thermostat will not control the temperature which could result in your HVAC
system not functioning as you intended and lead to possible damage from
overheating or excessive cooling.
• If the thermostat batteries fail with the heat OFF, this could result in no
heat and possible frozen or broken pipes and water damage.
• If the thermostat batteries fail with the cool OFF, this could result in no
cooling and could cause possible damage or excessive temperatures.
• Always use new alkaline batteries.
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IS-ZW-TSTAT-300 Advanced Thermostat Installation Guide
