11
DRISTEEM GTS HUMIDIFIER INSTALLATION AND OPERATION MANUAL
SEALED COMBUSTION
WARNING
Requirement for manifolding sealed combustion piping runs:
When installing sealed-combustion piping for more than one GTS humidifi er, do not commonly manifold multiple
sealed combustion piping runs without having the manifold sized for the specifi c installation by a licensed
engineer. Failure to follow these instructions could starve the GTS humidifi er of combustion air resulting in either
the burners not being able to light or high carbon monoxide levels, which may cause severe personal injury or
death.
The GTS humidifi er supports sealed combustion using DN100 PVC or CPVC piping. All GTS models have a single-point
connection to the blower inside the front door. See Figure 11-3.
When running PVC or CPVC piping for sealed combustion, the maximum allowable distance to the outdoor air source is
21.3 m including 2.1 m equivalent length for each elbow. The outside air source opening must be covered with a large
mesh screen to prevent the introduction of unwanted materials without restricting airfl ow.
If sealed combustion piping is less than 6 m in length, DriSteem recommends insulating the piping to prevent
condensation.
SEALED COMBUSTION OR OUTDOOR ENCLOSURE
To ensure a supply of clean, fresh air, the GTS humidifi er combustion air must be at least 3 m away from any
mechanical exhaust outlet.
Combustion and ventilation air
DN100 PVC or CPVC combustion air intake
OM-1225
FIGURE 11-3: GTS OPTIONAL SEALED COMBUSTION CONNECTION
Front door