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CARNES HTAH Manual page 7

Commercial, industrial and institutional steam humidifiers

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Setpoint Timeout –
This page is where the Setpoint Timeout value is set. The
maximum amount of time allowed for the unit to reach
setpoint during a fill sequence is designated by the
Setpoint Timeout. Its default value is 30 minutes, but
can be set as high as 255 minutes. After the timer
expires during a fill sequence, the humidifier assumes
the drain valve is stuck open (due to sediment buildup),
and begins pulsing the drain valve to attempt to unclog
it. After the pulsing routine, the humidifier will attempt to
reach setpoint for a second and third time. After the third
attempt without reaching setpoint, the unit will shut down.
High Water Timeout –
This page is where the High Water Timeout value is
set. This is the maximum amount of time allowed for
the unit to run in a 'Reduced Setpoint' mode (See
Setpoints page). The timeout has a range from 0 to 168
hours, with the default being 24 hours. If the humidifier
setpoint is artificially reduced due to a high water situa-
tion, the humidifier will continue to run. If the humidifier
cannot work it's way back up the normal max/controlled
setpoint, the humidifier will shut down after the High
Water Timeout value elapses.
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Humidifiers | Displays & Internal Controls
Boil Down Timer –
This page is where the Boil Down Timer is set. The Boil
Down Timer is variable between 0 and 255 seconds,
with a default value of 25 seconds. Setting the Boil Down
Timer higher will result in an increased water level, and
less-conditioned water. This may be helpful in reducing
low water level induced arcing and corrosion of cylinders.
More water is consumed by the humidifier when the Boil
Down Timer value is increased.
Settings Password –
This page is where the password for the settings menu
can be changed or disabled.
If the password for the Settings menu is forgotten, it can
be reset. To do this, remove power to the humidifier,
move the jumper on W4 from pins '1 and 2' to '2 and 3',
and power the unit back on.
Return the jumper to pins '1 and 2' afterward. Pins '1 and
2' are to the left, and pins '2 and 3' are to the right.
The different yellow buttons on both setting pages allow
for the changing of different values. Below is a brief
summary of each, and more information can be accessed
within the page itself.
G-7

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