NOTICE If for any reason the rotor is blocked, the motor will electronically switch
off. Before looking for any blockage make certain to disconnect the electrical
power source to the unit. Once the blockage is cleared the motor will
automatically restart when the electrical power is turned back on.
EC motors have under voltage protection. If the power source voltage falls below approximately 150VAC/3Ph (for
230-volt motors) or approximately 290VAC/3Ph (for 460-volt motors) for a minimum of five (5) seconds, the motor
will automatically switch off and a NO AIRFLOW alarm will be energized and display on the controller. If the power
source returns to the allowable voltage, the motor will automatically restart.
NOTICE The Mini-dap4 or dap4 controller has a time delay before the NO
AIRFLOW alarm is energized. The alarm is adjustable from 5 to 180 seconds, in
5 second increments. On sites where a voltage problem is known to exist; the
delay can be adjusted to eliminate “nuisance” alarms until the problem is
corrected. See Menu K - ALARMS and LIMITS, NO AIR FLOW ALARM TIME DELAY
in the Mini-dap4 or dap4 User Manual.
7.4.3 EC Plug Fan Maintenance
Maintenance is not required on EC motor/plug fan modules. The motors are sealed, have maintenance free ball
bearings and permanent lubrication. The only acceptable service is replacement.
Units with Belt Driven Blowers
Belt driven blowers are standard on all gPod ceiling units. These blowers have belts and some bearings that must
be regularly maintained.
7.5.1 Belts
Belt tension should be checked on a regular basis (monthly) to ensure proper tension. If tightening is required,
loosen the four (4) mounting bolts. Turn the adjustment screw on the end of the motor mounting channel until the
proper belt tension is attained. Retighten the four (4) mounting bolts. Damage can occur from belts that over
tightened. The amount of play in a typical drive set should be 1/2 inch. When tightening the belts make sure the
pulley alignment is true. If the belts are over tightened or if the pulleys are misaligned, the bearing life and belt life
are shortened considerably.
7.5.2 Bearings
Ceiling mounted gPod units with 2 HP or smaller motors have permanently lubricated bearings and do not require
maintenance. Motors of 3 HP and above have a pillow block bearing that must be greased quarterly, as needed.
Some motors have Zirk type grease fittings on the bearings. If so, the motor should be greased at least annually.
Use NLG1 grade 2 lithium or lithium complex grease. Care should be taken to avoid over-greasing the bearings.
Only one or two pumps from a manual gun are required.
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