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17
Gas Fired Outdoor Enclosure Option
The Series GFHE unit is intended to be used where the gas fired unit will need to be mounted outdoors.
Site Selection:
Provide a level, solid foundation for the humidifier. In the case where the unit will be mounted on a curb,
verify a gasket will be used between the curb and the GFHE unit to protect against moisture entering the
building. If the unit will be mounted on poured concrete pad, verify the pad will properly support the unit and
all support point dimensions are accurate.
The GFHE was intended to only be moved either by a forklift using the skid the unit was shipped on, or by
lifting the hooks provided.
If being moved by a forklift, with skid in place, make sure the forks extend the entire width of the unit.
Forks that do not extend the entire width could cause the unit to tip, which could create an unsafe
moving situation or could cause the unit to be dropped, causing permanent damage to the unit.
If the unit is to be lifted using the lifting hooks, a load spreader must be used. The load spreader shall
be wide enough to ensure the lifting cables clear the sides of the units. The load on the cables should be
distributed for even lifting, preventing the unit from tipping.
Verify all frame and support bolts have not loosened during shipping.
The humidifier should be mounted in a location where all panels can be easily accessible and removed
if required for servicing.
The humidifier should be located in an area where the fresh air inlets are not close to any other
exhaust systems, or in any location where potentially flammable vapors or liquids could be taken in to
the combustion chamber.
Remove unit from shipping skid prior to locating final position of unit.
Please check drawings below for particular model numbers to locate all utility knockout locations in
outdoor enclosure for all utilities and flue piping. Use the appropriate plugs or knockouts for each
utility required. In the event any utility piping needs to be run thru the bottom of the unit, all holes will
have to be sealed around the piping. The bottom of the unit is also used as the drain pan.
All water lines should be run to eliminate the possibility of freezing, and should be insulated.
Combustion air intakes are located on the access panels. In the instance a sealed combustion
package is used, verify all connections are secure and filter is in palce in the inlet filter box. Air
intakes should be positioned to avoid having natural air flow blowing directly into the air intakes.
Verify filter is in place for electronics cabinet air intake.
If the unit was provided with optional factory installed sealed combustion kit, verify all clamps and
connections are secure.
In environments where the GFHE unit will be exposed to extreme cold conditions, an optional heater
package can be provided. If the heater package is installed, there will be two non-adjustable thermo
stats factory pre-set to energize the heaters if the ambient temperature in the cabinet fall below 60F.
The heaters will stay energized until the internal cabinet temperatures reach 75F.
External flue piping will be filed installed, and supplied by installing contractor. Flue piping can be
installed on either side of the unit (see drawings on pages 18-21). Consult local codes for exact flue height
requirements. B-Vent type piping will be acceptable for all the outdoor enclosure units.
An optional curb package can be provided with the unit. Please consult factory, or your local Armstrong
Sales Representative for more information.
