Carrier 40UH050, Инструкция по установке, запуску и обслуживанию

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40
Ball Bearing Replacement (40UV,UH150;
40UH200 Units Only)
Refer to Fig. 28 for 40UH200 units only, Fig. 29 for 40UV150
and 40UH150 units with PSC motors, Fig. 30 for 40UV150 and
40UH150 units with ECM motors.
To replace ball bearing:
1. Turn off all power to unit.
2. Remove front (40UV) or bottom (40UH) panels and
right (motor end) end panel.
3. Remove top panel and set optional vanes and screens to
the side (40UV). Remove ductwork if required and
remove top (40UV) or front (40UH) discharge plenum.
For non-ducted 40UH horizontal units with front double
deflection discharge grille, remove grille for access to
wheel setscrews. See Fig. 25.
4. Remove 1 /
4
-in. head screws along length of unit that
secure coil baffle to blower section and remove front coil
baffle. See Item 5 in Fig. 25.
5. Loosen setscrews on all blower wheels (two per wheel).
See Fig. 26 and Fig. 28.
6. Loosen bearing setscrews.
7. Remove wiring harness connector(s) from motor.
8. If unit has ECM motor, remove motor shroud (sheet
metal cover — Fig. 28, Item 6; Fig. 30, Item 4) by
removing two
5 /
16
-in. hex nuts. Do not discard cooling
shroud.
9. Loosen 5 /
16
-in. motor mount (Fig. 28, Item 7; Fig. 29,
Item 2; Fig. 30, Item 2), nut (Fig. 28, Item 3; Fig. 29,
Item 5; Fig. 30, Item 6), and bolt (Fig. 28, Item 4; Fig.
29, Item 4; Fig. 30, Item 5), until motor housing (Fig. 28,
Item 5; Fig. 29, Item 3; Fig. 30, Item 3) moves freely.
10. Slide shaft-coupling-motor assembly (Fig. 26, Items 3, 2,
1; Fig. 28, Items 5, 2, 10) out of wheels and unit until
shaft clears inboard/center bearing assembly (30-in. max
clearance required from edge of frame end).
11. Remove 1 /
2
-in. bolts (Fig. 26, Item 4; Fig. 28, Item 9)
and hex nuts (Fig. 26, Item 7; Fig. 28, Item 1) securing
bearing to bearing bracket. Remove bearing (Fig. 26,
Item 5; Fig. 28, Item 8).
12. Install new bearing (Fig. 26, Item 5; Fig. 28, Item 8).
Secure with 1 /
2
-in. bolts (Fig. 26, Item 4; Fig. 28, Item 9)
and hex nuts (Fig. 26, Item 7; Fig. 28, Item 1).
13. Slide shaft-coupling-motor assembly (Fig. 26, Items 3, 2,
1; Fig. 28, Items 5, 2, 10) back into bearing and wheels.
Do not use excessive force. Damage to wheels may
occur.
14. Insert shaft-coupling-motor assembly into wheels until
motor clearance is as specified for motor type (PSC or
ECM). See Fig. 31 or Fig. 24.
15. Ensure that motor shaft is perpendicular to motor blower
endplate. Tighten 5 /
16
-in. motor mount (Fig. 28, Item 7;
Fig. 29, Item 2; Fig. 30, Item 2), nut (Fig. 28, Item 3;
Fig. 29, Item 5; Fig. 30, Item 6), and bolt (Fig. 28, Item
4; Fig. 29, Item 4; Fig. 30, Item 5), until motor (Fig. 28,
Item 5; Fig. 29, Item 3; Fig. 30, Item 3) is secure.
16. Install motor shroud (sheet metal cover - Fig. 28, Item 6;
Fig. 30, Item 4) using two 5 /
16
-in. hex nuts if using ECM
motor. Align “window” with receptacles on motor.
Motor control module could overheat and fail if oper-
ated without cooling shroud .
17. Re-attach green ground wire that connects the motor to
the frame with 1 /
4
-in. head screw if unit has a PSC motor.
The ECM motors are grounded through the harness.
18. Re-attach wiring harness connector(s) to motor.
19. Center each wheel in its respective housing and tighten
wheel setscrews (two for each wheel).
20. Rotate the fan shaft by hand to ensure that fans are
unrestricted and can rotate freely. Check for any fan
obstructions.
21. Remove lockout and operate unit for approximately
60 seconds to let inboard/center bearing mount
self-adjust.
22. Lock out and tag all power supplies to equipment and
controls. Tighten the two bearing setscrews.
23. Re-install the coil baffle using the six 1 /
4
-in. head screws
that attach the coil baffle to the coil section. See Item 4 in
Fig. 25.
24. Re-install 1 /
4
-in. head screws along length of unit secur-
ing coil baffle to the blower section. See Item 5 in
Fig. 25.
25. Re-install optional vanes and screens and install top
panel (40UV). Re-install top (40UV) or front (40UH)
discharge plenum and ductwork if required or discharge
grille.
26. Re-install front (40UV) or bottom (40UH) panels. Re-
install end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH)
matches unit tag.
27. Restore power to unit.
WARNING
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.
CAUTION
The assembly order of the bearing installation is critical. Be
careful with all components during removal and installa-
tion. Any excessive force applied to these components can
cause unintended damage and void unit warranty.
IMPORTANT: Tag each right front panel (40UV) or
middle bottom panel (40UH) for each unit. Panels have
electrical information specific to each unit.