Honeywell TrueSTEAM Series - Wiring Errors & Troubleshooting

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WIrING
What are my options and when would I use one over the other?
Two levels of safeguarding are provided when TrueSTEAM is configured to monitor airflow since mechanical air movement is required to
change the system's switch state and HVAC power is transferred to TrueSTEAM to indicate this state or transition to TrueSTEAM.
If the thermostat is powered from the HVAC system and power is interrupted, then the thermostat can't turn on TrueSTEAM or the system fan.
This is a safeguard to prevent humidifying without airflow applicable only to thermostats that control the fan and humidifier.
With humidistats that are separate from the thermostat, it will be required to configure TrueSTEAM to control the system fan.
• Slight differences exist between the options, which will determine if fan control is desired through TrueSTEAM or the thermostat
— TrueSTEAM fan control enforcement utilizes a temperature sensor in the water tank which does not force the fan on
until just before humidity is produced. For homeowners that are sensitive to air draftiness in the home, this provides
optimal humidity output while minimizing fan operation.
— Using the thermostat for fan enforcement during humidity calls is ideal for minimizing the amount of wiring between
the TrueSTEAM and the HVAC system. By setting the thermostat to energize system G with each HUM demand call,
you need only two wires from the TrueSTEAM to the control (HUM terminals on TrueSTEAM to HUM terminals on
equipment interface module or control). In addition DIP-4 on TrueSTEAM is in the UP position.
What happens if done wrong?
• It is critical that contractors congure TrueSTEAM to operate in conjunction with the system fan, either through the
humidifier wiring or through a thermostat with humidifier control.
— If neither the TrueSTEAM Gf-Gt enforcement or thermostat fan with HUM demand enforcement are enrolled,
there is risk of TrueSTEAM producing humidity without air movement in the duct.
> Example: If the HUM-HUM terminal is wired to a HUM-HUM terminal on a basic manual humidistat that is separate from
the thermostat, and you do not wire the G terminals through TrueSTEAM, then TrueSTEAM will humidify without turning the
system fan on.
• Keep in mind that TrueSTEAM can monitor power with DIP-4 DOWN, but if G is missing in either scenario, TrueSTEAM will produce
humidity without knowledge of fan control.
How do I troubleshoot?
• The most common complaint you will hear from homeowner if G enforcement isn’t engaged is ‘I’m not getting humidity.’
— If you get this complaint, unplug TrueSTEAM line cord and remove cover. Ensure G is wired properly as described
above.
Ensure TrueSTEAM can enforce the system fan with these steps:
— Turn the desired humidity to off, or a level lower than the actual indoor humidity present.
— Turn off system Heat or Cool calls.
— Set the thermostat fan to 'Auto', and validate the fan is off before proceeding.
— Turn the desired humidity to on, or a level higher than the actual indoor humidity present.
— Validate that the TrueSTEAM starts the fan. If using the Gt-Gf wire connections, note that the fan start will be up to
20-minutes after the initial humidity call, as it waits for water to near boil. Wait for it to engage the fan.