SKG3 Gas Fired Humidifier
Installation Instructions and User Manual
25
Stage 6
– Combustion Air Installation
Natural
Ventilation
Installation
Natural ventilation configuration - Fig. 34
Ducted Combustion Air
“Ducted Combustion Air” option, also called “Sealed Combustion”, is available
upon request.
When ducted combustion air option is installed, requirement for minimum low
level and high level natural ventilation does not apply.
Installation of the combustion air duct must be as direct as possible,
minimizing the number of turns or elbows, with a maximum of 6 elbows in total.
Use only duct materials suitable to supply air from the outside to the humidifier.
Combustion air duct length and flue gases venting pipe must not exceed:
100ft (30m)
– 10ft (3m) x (total # of 90˚elbow) – 5ft (1.5m) x (total # of
45˚elbow).
Combustion air duct must be insulated to avoid condensation around the duct
when outside air temperature is below 32°F (0°C).
Ensure that the combustion air duct connections are tight.
Minimum combustion air duct upward gradient must be
¾’’ (20mm) in 40’’ (1m)
horizontal run.
Model
Combustion air inlet
diameter per module
SKG3-
110-1 to 810-4
Ø
2” (51mm) O.D.
Low level opening
High level opening
Outside
Wall
Humidifier’s Air openings
All manuals and user guides at all-guides.com
all-guides.com
