19
DRISTEEM GTS HUMIDIFIER INSTALLATION AND OPERATION MANUAL
1. Ensure there are no gas leaks in the gas piping and
that all wiring and gas connections are complete.
2. Check for proper gas supply pressure. See the
humidifier nameplate label.
3. Apply power and gas to the humidifier.
4. Generate a call for humidity.
The Vapor-logic controller has a Test Run capability to
confi rm system functionality. This capability allows a
technician to simulate a demand for steam production
when there is not demand (such as when performing
routine maintenance).
To confi rm functionality:
a.
Go to the Test Run section of the Diagnostics
menu.
b.
Set system demand percent, and set Test Run time
duration.
c. Push the Start button.
The humidifi er mode changes to Test.
The burners will light and ramp up to 100% until
the humidifi er is producing steam. At this point,
they will modulate to meet the demand.
5. If the burners do not light, refer to the Troubleshooting
guide in the
Vapor-logic version 5 Installation and
Operation Manual
(shipped with the humidifier).
Note:
This manual is also available on the
Literature
tab at www.dristeem.com .
6.
After the water temperature reaches 100 °C and
the tank is at a boil, use a combustion analyzer
to determine the combustion characteristics of the
burners. Guidelines for products of combustion are:
• CO less than 40 ppm (low single digits is the
norm)
• CO
2
from 8% to 10%, preferably 9%
• O
2
between 4% and 7%
• Flue Temperature less than 204 °C plus room
temperature
• Burner
effi ciency greater than 80%
• Orange color fl ame
Burner tuning
7. Locate the throttle screw on the gas valve assembly.
See Figure 19-1.
8. If temperature or CO percentage are higher than the
ranges in step 6, turn the throttle screw clockwise
1/4 turn at a time until the readings are acceptable.
If CO percentage and/or burner efficiency are lower
than the ranges in step 6, turn the throttle screw
counterclockwise 1/4 turn at a time until readings are
acceptable.
Note:
If the humidifi er has multiple burners, adjust
them all an equal amount before retesting with
the combustion analyzer.
9. If the humidifier has a dedicated gas meter, use it
to ensure that gas flow rate is not greater than the
nameplate label on the humidifier. Code dictates that
flue temperature must be below 204 °C plus room
temperature, and CO level must be below 40 ppm.
10. Reset the humidifier to the desired set point and leave
the humidifier in operation.
Follow these instructions closely to ensure proper combustion and the most effi cient burner setting. For humidifi ers with
multiple burners, tune all burners (individual burners can be tuned while other burners are running).
FIGURE 19-1: THROTTLE SCREW
Remove cap. Throttle screw is inside of housing.
NOTE:
The GTS humidifi er is adjusted for correct performance. Only a qualifi ed gas appliance technician should alter
the throttle setting.