First Co FRR - Manual (Page 6)

6
Coil Cleaning
Remove return air grille and filter, then brush fins up and down, not side to side, with a stuff bristle brush. Follow with a
vacuum cleaner.
This method is prefered over compressed air since the dirt can be driven deeper into the coil with no benefit.
Replace filter or preferably install a new one and then the return air grille once finished.
Up & Down
Drain Check
Check drain pan and “P” trap at the beginning of each cooling season since it is possible for dust and debris to fall into the
unit through the supply grille. The rubber “P” trap is secured to the drain pan nipple and drain riser by way of two spring
clamps which can be opened with water pump pliers or standard pliers adjusted for a maximum grasp.
The drain pan is removed by unscrewing the two mounting brackets on the sides of the cabinet. Set the brackets aside.
Disconnect the “P” trap from the drain pan. By pulling down and then up remove the drain pan first. Observe the “P” trap
insertion depth on the drain riser and save this information for reinstallation. Remove “P” trap.
Material will naturally settle to the bottom of the trap so wash thoroughly in a utility container or sink with soap and water.
When ready, preattach the “P” trap to the drain riser using one clamp and the depth setting observed above. Slip the last
clamp over the drain pan end of the hose a few inches back from this end with the clamp tangs facing forward. Replace the
pan in its cradle and secure the brackets. Reattach the hose to the drain pan and secure by sliding the clamp back in place.
Tangs forward
Tangs down
One screw each
Fan Assembly
Disconnect fan harness, from the motor, with the quick release tab on the connector at the right end of the motor. Be
prepared to support the weight of the blower housing and motor. Remove two nuts in the front of the blower houising
assembly to release the fan from the blower deck above. Rotate down and then pull assembly out.
Check the blower wheel for accumulation of dirt, debris or filter fibers. Clean with brush and/or high pressure air if available.
(2) 1/4-20 nuts