Coil Assembly Removal And Reinstallation - Carrier 40UV Installation, Start-Up And Service Instructions Manual

To reinstall blower assembly to frame of unit:
1. Reinstall blower section into frame assembly.
2. Tighten the four 5 / in. nuts retaining blower section to
16
frame. See Item 3 in Fig. 37.
3. Tighten the two 5 / in. nuts retaining the inboard bearing
16
bracket to the pipe chase (40UV,UH150 units only). See
Item 6 in Fig. 38.
4. Reinstall two carriage bolts that attach the front brace to
the frame sides. See Item 6 in Fig. 37.
5. Rotate the fan shaft by hand to ensure that fans are
unrestricted and can rotate freely. Check for any fan
obstructions.
6. Re-attach green ground wire that connects the motor to
the frame with ¼ in. head screw if unit has a PSC motor.
ECM motors are grounded through the harness.
7. Connect harness connector(s) to motor.
8. Reinstall the coil baffle using six
attach the coil baffle to the coil section. See Item 4 in
Fig. 37.
1
9. Reinstall the / in. head screw at center of blower deck
4
attaching blower deck to pipe chase. See Item 1 in
Fig. 37.
10. Reinstall the four 1 / in. head screws holding the blower
4
section sides to the coil section sides. See Item 2 in
Fig. 37.
1
11. Reinstall / in. head screws along length of the unit,
4
securing coil baffle to the blower section. See Item 5 in
Fig. 37.
12. Reinstall optional vanes and screens and install top panel
(40UV). Reinstall top (40UV) or front (40UH) discharge
plenum and ductwork, if required.
13. Reinstall front (40UV) or bottom (40UH) panels. Rein-
stall end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH) match-
es unit tag.
14. Restore power to unit.
IMPORTANT: Disassembly order is not as important as
reassembly. The assembly order of the bearing bracket
installation is critical to having a well balanced and
sound blower deck.

Coil Assembly Removal and Reinstallation

(Fig. 39)
Lock out and tag all power supplies to equipment and con-
trols prior to servicing unit. Follow all safety codes. Failure
to do so could result in personal injury.
Turn off all power supplies to equipment and controls. Fail-
ure to do so may cause personal injury or damage to the
unit.
1
/ in. head screws that
4
53
To remove coil assembly:
1. Turn off power to the unit.
IMPORTANT: Tag each right front panel (40UV) or
middle bottom panel (40UH) for each unit. Panels have
electrical information specific to each unit.
2. Remove all front (40UV) or bottom (40UH) panels. Re-
move end panels.
3. Remove 1 / in. head screws along length of unit that se-
4
cure coil baffle to blower section. See Item 2 in Fig. 39.
4. Remove four 1 / in. head screws that connect the blower
4
section sides to the coil section sides. See Item 1 in
Fig. 39.
1
5. Remove / in. head screws attaching outside air (OA) ac-
4
tuator to damper shaft OR locking quadrant assembly to
damper shaft. Remove OA actuator or locking quadrant
assembly.
6. Tag low-limit thermostat wiring and terminals. Dis-
connect low-limit thermostat
compartment).
7. Drain water and/or recover refrigerant in accordance
with all applicable codes. Disconnect piping from coil
connections.
8. Tag optional electric heat element wire terminations for
later reconnection. Disconnect element wires from elec-
tric heat control box (remove coil baffle for access).
9. Remove the four 5 / in. nuts retaining the coil section to
16
the frame.
10. Remove coil section from frame.
To reinstall coil assembly:
1. Replace coil section into frames assembly.
5
2. Tighten the four / in. nuts retaining coil section to
16
frame.
3. Reconnect electric heat wiring in electric heat control
box.
4. Reconnect wiring to low limit thermostat.
1
5. Replace the four / in. head screws holding the blower
4
deck to coil section (two on each side).
6. Replace coil baffle using
in Fig. 39.
7. Reinstall outside air actuator or locking quadrant handle
1
using / in. head screws.
4
8. Reconnect piping to coils. If water coil, purge air from
coils and perform hydrostatic test to check for leaks. If
DX coil, perform leak test using nitrogen, and evacuate
and charge per recommended HVAC procedures and all
applicable codes.
9. Replace coil section side insulation.
10. Replace front (40UV) or bottom (40UH) panels. Replace
end panels. Ensure that tag on each right front panel
(40UV) or middle bottom panel (40UH) matches unit
tag.
11. Restore power to unit.
wiring (right end
1 / in. head screws. See Item 2
4