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DRISTEEM GTS HUMIDIFIER INSTALLATION AND OPERATION MANUAL
• The GTS humidifi er is a Fan Assisted Category I
(natural draft) Appliance. It is a Class B23 appliance,
without a draught diverter, with a combustion
air blower upstream of the heat exchanger. A
GTS humidifi er with the sealed combustion option is
a Class C53 appliance. Installations where the vent
terminates in a side wall of the building, or where the
overall horizontal run exceeds the overall vertical run,
require a power venter.
• Maximum
fl ue temperature under normal operating
conditions is 205 °C plus ambient.
• Maximum abnormal-operation fl ue temperature is
348 °C plus ambient.
• Flue draft negative pressure greater than 50 Pa may
cause unacceptable post ignition.
• Vent piping must be approved for a Category I
appliance. Do not use more than one type of venting
per application.
• Vent terminal must be at least 1 m above any forced
air inlet located within 3 m.
• Do not use vent equipment from more than one
manufacturer.
• When connecting the humidifi er to a gas vent or
chimney, installation must conform to:
– Local and national directives and regulations for
the installation of gas-fi red equipment
– Governing and building codes
– Vent manufacturer’s instructions
• When applying the codes, see also the venting
manufacturer's instructions, the service gas supplier's
regulations, and the specifi c instructions provided in
this manual.
• Inspect for proper and tight construction. Remove any
restrictions or obstructions. An existing chimney may
require cleaning.
• Do not connect this humidifi er to a chimney fl ue
servicing a separate appliance designed to burn solid
fuel.
• Never connect this humidifi er to a chimney serving a
fi replace, unless the fi replace opening is permanently
sealed off.
• Code prohibits venting into an unlined masonry
or concrete chimney. If the humidifi er is connected
to a lined, masonry chimney, the chimney must be
sized and installed according to the provisions of the
governing codes.
Venting
• Vent connector serving this appliance shall not be
connected into any portion of mechanical draft
systems operating under positive pressure.
• Add insulation to any roof or wall penetration vent
connector that is exposed to ambient temperatures of
0 °C or less, especially any application using single-
wall vent pipe as a connector.
• Do not insulate vent pipe exposed to outdoor weather
conditions (e.g., above roof lines).
• Install vent piping as straight as possible, with a
minimum number of turns or elbows.
• Maintain a minimum upward slope of 2% on all
horizontal runs.
• Rigidly support the vent pipe every 1.5 m or less with
hangers or straps to ensure there is no movement after
installation. The humidifi er vent box should not support
the weight of the vent piping.
• No portion of the vent system should extend into, or
pass through, any circulation air duct or plenum.
• Install and fi re-stop all vent pipe passing through
fl oors, ceilings, and walls with the proper clearances
from combustible material according to local and
national directives and regulations for the installation
of gas-fi red equipment.
• In replacement installation where an existing vent
system may be used, inspect the vent system for
condition, size, type of vent material, and height to
meet the requirements in these instructions.
CAUTION
Flue condensate removal
Install a drip leg or fl ue box condensate drain for start-
up fl ue condensate removal. Failure to follow these
instructions could cause water to accumulate in the
fl ue box.
OUTDOOR ENCLOSURE VENTING
The vertical section of fl ue must be at least 1.5 meters or
meet all governing codes, whichever is longer. DriSteem
recommends a drip tee directly after the factory-supplied vent
connection. DriSteem recommends a high-wind vent cap on
all GTS humidifi ers. See Figure 4-2.
GENERAL VENTING GUIDELINES
WARNING
Installation requirements:
The humidifi er must be installed by a qualifi ed technician and meet the requirements of all governing codes.
Failure to follow these instructions could cause severe bodily injury or death.
