INSTALLATION
Locating the Humidifier
• Provide a level, solid foundation for the humidifier.
Locate the humidifier as near as possible to chimney or
outside wall so that the flue pipe from the humidifier is
short and direct. The location should also be such that
the gas ignition system components are protected from
water during humidifier operation and service.
• The humidifier should be installed in a location away
from drafts and properly protected. If installed in a
separate room, follow the instructions concerning
combustion and ventilation air.
• The humidifier should be located in an area where
leakage from the tank or its connections will not result
in damage to the adjacent structure or to lower floors of
the structure. When such locations cannot be avoided,
it is recommended that a suitable drain pan, adequately
drained, be installed under the humidifier. The pan must
not restrict combustion air flow.
• The humidifier must not be installed on carpeting,
tile, or other combustible material other than wood
flooring (indoor application only).
• Install humidifier so electrical components are
protected from water.
• The appliance must be kept free and clear of insulat-
ing materials when located in an insulated space.
Insulating material may be combustible. Inspection of
the appliance area must be performed when the appli-
ance is installed, or when insulation is added.
• Locate the humidifier in an area where operating
noise will not be objectionable.
• The VAPOR-LOGIC®3keypad should be mounted in
an easily accessible location for the operator between
0.4 m and 1.6 m above the floor.
Important:
• Remove all shipping brackets and materials before
operating the humidifier.
• Humidifier flue gases must be vented to the outside
atmosphere.
• Power supply disconnect switch must be in the off
position while making connections to prevent electrical
shock and equipment damage. All units must be wired
in strict accordance with wiring diagram furnished with
this unit.
• Turn off all gas while installing the run-out and
manual shut-off valve for the humidifier.
Supply Water and Drain Overflow
Connections
IMPORTANT: The humidifier is shipped with the
automatic drain valve locked in the manual open
position. This position reduces the possibility of
damaging the valve seat from the heat of sweating the
drain connection during installation. After the drain
connection has been completed, the “manual open”
lever position must be reset to the auto position. Failure
to close the drain valve will not allow the tank to fill.
Regardless of the type of water used, the following
general instructions must be followed:
• Union connections must be made at the humidifier on
the cold water supply and drain/overflow lines.
• A shut-off valve should be provided in the supply
water line to isolate the humidifier from the water
system while servicing.
• If the water pressure is above 420 kPa and/or water
hammer would be objectionable, a pressure reducing
valve or shock arrester should be installed.
• A DN25 (1") opening is provided in the humidifier tank
to accommodate skim and/or overflow protection.
(Note: Follow local code requirements regarding size of
drain pipe.)
• Insulating unions or bushings must be used to make
connections between copper and other dissimilar metal
fittings, such as galvanized steel. These insulating
fittings are required to minimize electrolytic corrosion,
which results from the direct connection of dissimilar
metals in a water system.
• Before beginning ignition sequence of the humidifier
at a new installation, be sure the humidifier tank is full of
water and the water is free to flow into the tank.
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