TM 9-4120-411-14
4.4 INSTALLATION INSTRUCTIONS - CONTINUED.
4.4.4.3 Remove filter (4) and return cover (5). Place filter back into flange assembly (2) and store the return cover for re-
use.
4.4.4.4 Install the flange assembly (2) into volute assembly (3) with the perforated duct collar facing out (opposite the way
it was removed). Align slots and turn clockwise to lock in place.
4.4.4.5 Loosen six captive screws (6) and remove supply panel (7) from lower retaining clips. Slide supply cover (8) out
of supply panel. Store the supply cover for re-use.
4.4.4.6 Uncoil condensate drain hose (9) then pass it through hole (10) in frame. Pull the entire length of hose from the
unit, leaving it attached to the volute assembly (3).
4.4.4.7 Unclip four quick release pins (11) then carefully pull heater barrel (12) out to stops (approximately 4 inches).
4.4.4.8 Install supply panel (7) into lower retaining clips then slip over heater barrel (12) and align mounting holes.
Secure with six captive screws (6).
4.4.4.9 Lower and secure cover per paragraph 4.2.
4.4.5 Remote Control Box Installation. See figure 4-5.
WARNING
The FDECU cover is heavy. Be sure the cover retaining rod is in place and
properly secured with hair pin cotter. Injury can occur if cover drops.
4.4.5.1 Raise and secure cover per paragraph 4.2 to access remote control box mounted inside unit.
4.4.5.2 Release two wing nut fasteners (1) to remove remote control box (2).
4.4.5.3 Release any fastener straps securing cable (3) then lay cable with remote control box outside unit and rest cable
in end panel notch (4).
4.4.5.4 Route remote control box (2) inside shelter then mount at eye level away from drafts or supply air opening. Seal
any opening made in shelter. If a mounting bracket is not provided inside the shelter for the remote control box, the
bracket (5), used in the FDECU for storage, can be removed and secured inside the shelter using standard hardware or
clamps.
WARNING
Rotating parts and lethal voltage levels are used in operating the FDECU. Be sure
power source is disconnected. Injury or death can occur if connected to power
source.
4.4.5.4.1 Loosen eight captive screws (6) and carefully pull the electrical assembly (7) out.
4.4.5.4.2 Turn to release three latches (8) and open power box assembly cover (9).
4.4.5.4.3 Remove two nuts (10), lock washers (11), flat washers (12), screws (13), flat washers (14), and bracket (5).
Install hardware back onto power box assembly (15) to seal holes. Install bracket into shelter as appropriate and mount
the remote control box (2).
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