gForce Ultra IOM
105
Upflow Unit Filter Replacement Procedure
• Turn OFF the disconnect switch to all remote electric facility power to the unit with the
external disconnect.
• Open the front access door(s) and remove the filters by lifting them up and maneuvering
the filter downward and out of the unit.
• Replace with new filters of equal size and type.
• Install the filters in the proper direction of the airflow.
• Test the operation of the filter differential pressure switch. The unit door(s) must be in place
and closed for proper differential pressure setpoint.
• Turn ON the electrical facility power to the unit. After the controller completes the self-
checks, the fan or blowers will start.
• Temporarily cover approximately 75% of the return air opening using heavy cardboard or
similar material to adjust the filter differential switch.
• Adjust the switch setpoint, if necessary.
Electric Reheat Elements
The electric reheat element is a finned enclosed, sheath type, fabricated of stainless-steel core sheath
with plated fins to withstand moist conditions. The reheat is installed on the air discharge side of the
cooling coil and has three (3) stages. The reheat can maintain room dry bulb conditions when the
system is calling for dehumidification. The reheat section includes a safety switches to protect the
system from overheating. The low-watt density elements eliminate ionization associated with open air
electric resistance heating.
Heating elements do not normally require maintenance. However, they may accumulate a film of dust
or dirt when unused for extended periods of time. When energized, the burning debris can create smoke
or an unpleasant odor. To help avoid a problem, periodic cleaning is recommended.
Humidifier
The unit is provided with a self-contained, microprocessor-controlled steam generator type humidifier
as standard equipment. The steam generating humidifier uses a disposable cylinder with electronic
controls. The humidifier discharges pure steam with no material dust carry-over and has a self-
regulating automatic flush cycle.
Cylinders are disposable and do not requiring cleaning or maintenance. The humidifier fill level, water
conductivity and flush rate automatically adapt, both in frequency and duration, to variations in the
incoming water. The humidifier assembly is capacity field-adjustable and includes a high-water probe.
Drain duration and drain interval are also field-adjustable. See the manufacturer’s literature for more
detailed information on field adjustments.
Humidifier Canisters
The humidifier has been designed to require very little maintenance. Regular maintenance consists of
checking the humidifier to insure it is in good condition, replacing the cylinder when the software advises
that the cylinder is spent and cleaning out the drain valve whenever the cylinder is replaced. The
frequency of change will depend on usage and water type. A set of the humidifier manufacturer’s
instructions is included with the paperwork placed inside the unit when it ships.
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