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Shut down humidifier
Follow the procedure below before performing service or
maintenance procedures (after the tank has cooled down
and drained):
1. Use the controller keypad to change the control mode
to Standby.
2. Shut off all electrical power to the humidifier using the
field-installed fused disconnect, and lock all power
disconnect switches in the OFF position.
3. Close the field-installed manual water supply and gas
shut-off valves.
INSPECTION
ANNUALLY (ALSO RECOMMENDED WHEN MAINTENANCE IS
PERFORMED)
1. All safety devices in the control circuit should be
cycled on and off to verify they are functioning. These
include:
• High limit switch
• Airflow proving switch
• Low water cutoff switch
• Redundant low water cutoff switch
2. Inspect tank and gaskets for leaks.
3. Verify that the float valve is closing off. If the float
valve will not shut off, there may be particulate on
the valve seat, or the EPDM seat may be worn and in
need of replacement.
4. As long as mineral-free water is used in the GTS,
no cleaning or flushing of the humidifier should be
necessary.
SEASONALLY (OR AS REQUIRED, DEPENDING ON WATER
QUALITY)
1. Inspect the blower motor. Since a lubrication port is
not provided, lubrication is not required.
2. Remove dust: Using a vacuum, remove all dust from
areas around the motor, vent fan(s), and louvers that
allow air to the shrouded area.
OFF-SEASON MAINTENANCE
1. Perform a complete inspection of the following:
• Float valve
• Low water cutoff switch
• Redundant low water cutoff switch
• Humidifier tank and gaskets
• Heat exchanger
2. Drain and rinse the humidifier tank.
3. After inspection, the humidifier should remain empty
until humidification is required.
GTS, DI water, service instructions
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).
Note: Although DI models do not require regular tank
cleaning, this service kit contains a new cleanout
plate gasket and nuts. If replacing the gasket,
replace the nuts also, and torque the nuts to 25 to
35 in-lbs (2.8 to 4.0 N-m).
GTS DRISTEEM DI WATER SERVICE MANUAL
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