Specifications

23
For high performance, and to minimize possible equip-
ment failure, it is essential that periodic maintenance
and inspections be performed on this appliance.
GTS
®
Standard Model Only
Using softened water will significantly reduce mineral
build-up in the humidifier. When softened water is not
available, the GTS is designed to deal with water hard-
ness in one of two ways depending on the degree of
hardness. For light to moderate hardness (up to 10
grains per gallon), using the surface water skim time
feature with annual cleaning is recommended. For high
mineral content water (above 10 grains per gallon), a
periodic drain and flush through the motorized drain
valve, in addition to the surface water skim time feature,
is recommended. The frequency of cleaning will depend
on water condition and evaporation load.
The humidifier and piping should be inspected for water
and gas leaks at least annually, all safety devices in the
control circuit should be cycled on and off to verify that
they are functioning.
Seasonally or as Required
Cleaning Evaporating Chamber - Slide the clean-out
tray out and dispose of any loose scale that has col-
lected in the tray. This should be done before the build-
up reaches the underside of the heat exchanger.
Cleaning Water Level Probes - Disconnect the plug
and cable assembly and unscrew the probe holder from
the GTS unit. The scale will easily flake off from the
sensing portion. The sensing portion (bottom 3/8") of the
probe should be brushed clean with stainless steel wool.
Cleaning Low Water Cut-Out Probe
Remove the humidifier cover and inspect the probe rod
for mineral accumulation. The rod comes from the top of
the tank near the back. The probe should be brushed
clean with stainless steel wool.
Cleaning Skim Overflow Fitting - Loosen deposits with
a long tool, such as a screwdriver. Proper skimmer
drainage should be verified by a weekly visual inspec-
tion. Water should drain from skimmer drain pipe after
each fill cycle. (For cleaning piping, disconnect and
flush out. If mineral deposits have restricted the flow,
replace piping.)
Blower Motor - Lubrication port is not provided, there-
fore lubrication is not recommended.
Remove Dust - Using a vacuum, remove all dust from
the areas around the motor and vent fan (s) and the
louvers that provide air to the shrouded area.
MAINTENANCE
Summer Maintenance
After the humidification season, a complete inspection
and cleaning of the probe control, skimmer, and water
chamber is recommended. After cleaning, the unit
should remain empty until humidification is required.
Adjusting the Surface Skim Bleed-Off Quantity
The skim time determines the quantity of water skimmed
with each fill cycle. The skim time is field adjustable
using the microprocessor.
Each time the GTS refills, it fills to an elevation near the
lip of the skim overflow fitting. A portion of the refill
water then flows to drain carrying the minerals floating
on the water with it. This reduces the mineral concen-
tration, thereby reducing the frequency of cleaning
needed.
The heated water that flows to drain is a cost of
operation. Cleaning the humidifier is also an operational
cost. Therefore, it is recommended that the user
observe and adjust the skimming quantity. By doing so,
a balance between minimizing mineral build-up and
conserving hot water can be achieved.
GTS-DI Model Only
The humidifier and piping should be inspected for water
and gas leaks at least annually. Also, all safety devices
in the control cabinet should be cycled on and off to
verify that they are functioning.
Make-up Water Piping
Use cold or hot makeup water. Even though the GTS
has an internal 1" air gap, some local codes may require
a vacuum breaker.
Caution: Minimum water supply pressure is 25 psi.
Cleaning Evaporating Chamber
As long as mineral-free water is used in the GTS, no
cleaning or flushing of the evaporating chamber should
be necessary.
Blower Motor - Lubrication port is not provided, therefore
lubrication is not recommended.
Remove Dust - Using a vacuum, remove all dust from the
areas around the motor and vent fan (s) and the louvers
that provide air to the shrouded area.
Summer Maintenance
After the humidification season, inspect floats and water
chamber, drain and rinse. Empty unit.
Caution: Label all areas prior to disconnection when
servicing controls, wiring errors can cause improper and
dangerous operation.
CAUTION: When performing maintenance on the
GTS, always place main electrical power discon-
nect switch in the off position and close manual
water and gas valves.
GTS-IOM-1298.pdf 23 11/17/2009 3:57:05 PM