42
GTS HUMIDIFIER LX SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
The GTS humidifier is pre-plumbed to support both room air and sealed
combustion. See Warning. Requirements and recommendations for each
follow.
ROOM AIR COMBUSTION
• All fuel burning equipment must be supplied with air for combustion of
the fuel. Sufficient air must be provided to ensure there is not a negative
pressure in the equipment room or space.
• Provide adequate combustion and ventilation air in accordance with
Section 5.3, Air for Combustion and Ventilation, of the National Fuel
Gas Code, ANSI Z223.1 or applicable provisions of governing codes.
Canadian installations must be installed in accordance with sections 7.2,
7.3, and 7.4 of the CAN/CGA.B149 Installation Codes and all authorities
having jurisdiction.
• For proper and safe operation this humidifier needs air for combustion and
ventilation.
Do not
block or obstruct air openings on the appliance, spaces
around the appliance, or air openings communicating with the humidifier
area.
• Do not locate in a dusty environment.
•
Do not
block the flow of combustion and ventilation air. To provide for
necessary oxygen for proper combustion, openings must be provided
to allow outside air to enter the space where the humidifier is located.
Enclosed spaces, such as equipment rooms, must be vented for combustion
air. The size of air openings must be based on all gas-burning equipment
installed in the space involved. Table 42-1 outlines four types of
locations, and the requirements of each.
General venting
Table 42-1:
Location of humidifier and required air openings (non-ducted combustion air)
Location description
Required air opening
Confined space with all air from inside the building;
conventional frame, brick or stone construction
with normal infiltration (Note: this location rarely
provides enough air for higher capacity units.)
Two openings, 1 sq. in. (6.5 cm
2
) per
opening per 1000 Btu/hr (293 W) input
The minimum free area of all openings
combined is 100 sq. in. (645 cm
2
).
Confined space with all air from outside the
building through air ducts
Two openings, 2 ducts, 1 sq. in. (6.5 cm
2
)
per opening per 2000 Btu/hr (586 W)
input*
Confined space with all air from outside the
building from through-wall openings only (no ducts)
Two openings, 1 sq. in. (6.5 cm
2
) per
opening per 4000 Btu/hr (1172 W) input*
Unconfined space with all air from outside the
building
Same as confined space; all air from outside
the building
* The minimum dimension of any opening is 3" × 3" (76 mm × 76 mm).
INSTALLATION
WARNING
Air for combustion
Air for combustion must not be
contaminated by halogen compounds,
which include fluoride, chloride,
bromide, and iodide. These elements
are found in aerosol sprays, detergents,
bleaches, cleaning solvents, salts,
air fresheners, chlorine and other
household products.
When the GTS is located in an
environment with negative pressure or
toxic air, pipe the sealed combustion
connection to fresh supply air at
atmospheric pressure.
Failure to follow these instructions could
cause severe bodily injury or death.
WARNING
Do not interfere, disable, or tamper
with the devices monitoring the
combustion gas discharge, including
the flue temperature and flue pressure
sensors. Only authorized and trained
technicians should perform any
service on these items. If the unit fails
repeatedly due to a discharge (flue)
fault, have the device serviced and
tested by authorized and trained
technicians.
