Installation guide

Page 66 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual
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GTS-DI models DI water quality recommendations
• Verify regularly that water processing equipment is operating
correctly. The presence of chlorides in improperly processed
DI water can cause pitting and failure of the tank and heat
exchanger. Your DRI-STEEM warranty does not cover damage
caused by chloride corrosion.
• GTS-DI models do not require regular cleaning, although regular
inspections are advised.
• GTS-DI models do not require skimming or draining and
flushing to remove precipitated minerals. However, at the end
of a humidification season, drain all DI humidifiers either
by manually opening the drain valve or by programming the
humidifier to automatically drain at end-of-season (electric fill
and drain valve required).
Cool down humidifier before beginning maintenance
Before performing any maintenance, allow the tank to cool down.
Note: Fresh make-up water is used to speed up cooling. Do not
close the manual water supply before cooling down the
humidifier; otherwise the tank could stay hot for several
hours.
• Tanks will have hot surfaces.
• Verify that there is no call for humidity and that the aquastat set
point (adjusted using the keypad/display Set Up screens) is less
than room temperature (default setting is 40 °F [4 °C]) so the
burners do not energize while cooling down the tank.
• Models with a standard drain valve:
– Manually open the drain valve.
– The float valve opens.
– Let the fill water run until the tank is cooled; then shut off the
field-installed manual supply water shut-off valve.
– Let the tank drain; then manually close the drain valve.
WARNING!
When performing maintenance on the GTS
humidifier, always change the control mode
to Standby, place all power disconnects in
OFF position and lock in OFF position, close
the field installed manual water supply and
gas shut-off valves. Failure to follow these
instructions may cause severe bodily injury
or death from electric shock.
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• For models without a manually operated drain valve, use the
keypad to perform the cool down process.
– From the Main menu, enter the Tank Status submenu.
– Change mode to Drain, and allow approximately half the water
to drain out of the tank.
– Change the mode back to Auto; the fill valve opens and the
humidifier cools down.
– When the fill valve closes, go back into Drain mode, and allow
the tank to drain completely. The humidifier should be cool
enough to work on.
– For more information about using the keypad, see the
Vapor-logic4 Installation and Operation Manual.
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Maintenance
GTS-DI models