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armstrong
international.com
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
armstrong
international.com for up-to-date information.
5
D3277
Hose Clamp
Steam Hose
Soldered Joints
Full Size Tee
Hose
2" Copper Tee
Reducer
1/2" or 3/8"
Copper Tube
To Drain
Fused Disconnect
or Magnetic Breaker
within Sight of Unit
Properly Sized Vent
24"
Gas Supply
Water in
3/8" NPT
3/4" Copper
10" Min.
Air Gap
3/4" Copper (Min.) Pitched
1" per 12" (Min.) to Open Drain
2" Insulated Copper
"P" Trap Drain Every
20' of Piping or at
Bottom of Vertical Run
See Detail "A"
Pitch 1" per 12"
Back to Unit
Up
Figure 5-1
Installation
Check Shipment.
A claim should be filed with the transportation company, and reported to Armstrong
International, Inc. if any items are missing or damaged.
Important:
Remove all shipping materials before installing 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 as
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 airflow.
The humidifier shall not be installed directly on carpeting, tile or other combustible material other than
wood flooring.
Install humidifier so electrical components are protected from water.
This appliance must be installed in a location free of insulation materials. Some insulating materials may
be combustible. Appliance area must be inspected during installation, or when insulation is added.
Minimum horizontal clearance of 4 feet from electric meters, gas meter regulator, and relief equipment.
Site Selection.
The humidifier should be installed in an easily accessible location. Do not install the unit
where malfunction of the humidifier might cause damage to non-repairable, irreplaceable, or priceless property.
Locating the Humidifier
Humidifier flue gasses must be vented to the outside atmosphere.
Power supply disconnect switch must be in the immediate vicinity of the unit and must be in the off
position while making wiring connections to prevent electrical shock and equipment damage. Wiring of
this unit must comply with all manuals, wiring labels included and all local codes.
Turn off all gas while installing the run-out and manual shut-off valve for the humidifier.
