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GTS, DI water, service instructions
INSPECTION RECOMMENDATIONS:
• User inspection every 30 days.
• Appliance system inspected once a year by a qualified
service person.
Note: Do the procedure below prior to cool-down/shut-
down.
DURING INSPECTION, VERIFY THE FOLLOWING:
• Proper field operation of burner. Measure CO,
CO
%, O
%, flue temperature, and burner efficiency
2
2
at 100% demand with the tank at a boil. Verify that
measurements are within the guidelines described in
Table 4-1; if not, consult DriSteem.
Table 4-1:
GTS products of combustion guidelines
(at 100% demand)
Less than 40 ppm; 0 or low single digits is
CO
typical
8-10%; 9% is typical for natural gas, 10% is
CO2 %
typical for LP gas
O2 %
4-7%
Less than 400 °F plus room temp.
Flue temperature
(Less than 204.4 °C plus room temp.)
Burner efficiency Greater than 80%
• Flue passageways external to the appliance, such as
vent connector and chimney, are clear and free of
obstructions.
• Vent connector is in place, sloping upward and is
physically sound without holes or excessive corrosion.
• Physical support of the appliance is sound without
sagging, cracks, or gaps between floor stand or tank
flanges.
• There are no obvious signs of deterioration of the
appliance.
• Burner flame is blue or orange in color — up to ¼"
(6 mm) from the surface of the burner.
4
GTS DRISTEEM DI WATER SERVICE MANUAL
Cool down humidifier
Before performing service or maintenance procedures,
allow the tank to cool down. Insulated and uninsulated
tanks will have hot surfaces.
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.
1. Verify that there is no call for humidity and that the
aquastat set point (adjusted using the keypad/display
Setup screens) is less than room temperature (default
setting is 40 °F [4 °C]) so the burners do not energize
while cooling down the tank.
2. Verify that the tank is in Auto mode so it will fill after
draining begins.
3. Drain the tank:
MODELS WITH A MANUALLY OPERATED DRAIN VALVE:
a. Manually open the drain valve. The fill valve will open
after enough water has drained out of the tank.
b. Let the fill water run until the tank is cooled; then shut
off the field-installed manual supply water shut-off
valve.
c. Let the tank drain; then manually close the drain valve.
FOR MODELS WITHOUT A MANUALLY OPERATED DRAIN
VALVE, USE THE KEYPAD TO PERFORM THE COOL DOWN
PROCEDURE:
a. From the Main menu, enter the following submenu:
• Vapor-logic3 controller: Control Modes
• Vapor-logic4, 5, 6 controller: Tank Status.
b. Change mode to Manual Drain (Vapor-logic3) or Drain
(Vapor-logic4, 5, 6), and allow approximately half the
water to drain out of the tank.
c. Change the mode back to Auto; the fill valve opens
and the humidifier cools down.
d. 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.
e. For more information about using the keypad, see the
Controller (Vapor-logic) Installation and Operation
Manual shipped with the humidifier.
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