Honeywell TrueSTEAM Series Reference Manual page 25

What happens if done wrong?
aside from wiring, the most common error would be misconfiguration of the dIP switches to enable truesteaM to check physical air
movement.
— If dIP 4 is up, it does not matter what position dIP 5 is in - truesteaM will not check its R and C terminals for power. and
because the air proving device is wired into the C terminal of truesteaM and the hVaC system, it will not be checking it for air
proving verification. Operation will continue as if the air proving device is not installed. as long as the system fan G-enforcement
is properly wired, truesteaM or its control will still enforce fan energization upon humidity demands.
— If dIP-4 and dIP-5 are down, truesteaM is not enabled to check for air proving through its R and C terminals. humidifier
operation will continue as if the air proving device was not installed. again, as long as system fan G-enforcement is properly
wired, truesteaM or its control will still enforce fan energization upon humidity demands. think of the system fan G-energization
as the primary safeguard feature, and the air proving device as a supplementary option.
How do I troubleshoot?
Verify dIP-4 is down and dIP-5 is up on truesteaM when using the air proving device. It must be power monitoring R and C since the air
proving device is on the C terminal. having dIP 4 down provides power monitoring and dIP-5 enables the truesteaM to check for airflow
once the water in the tank reaches 170°F and truesteaM energizes the fan. truesteaM will wait until water is 170°F before activating
the fan, to avoid air draftiness in the home.
Summary
Illustrated in this paper are the most common questions contractors have asked regarding wiring the truesteaM humidifier. What is given
as a response are most common for overcoming these questions. It is the contractor's choice on what options make most sense for
their business and customer. standardizing on specific control schemes and wiring will help to overcome these hurdles as the installing
technicians become familiar with the installation of the truesteaM humidifier, allowing for more installs per day.
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