Carrier 40RFAA08 - Fan Speed Setup Procedures; Supply Fan and Motor Service Access

22
NOTE: Values in the Field Accessories section are VDC adders.
Fig. 24 — Example of Fan Speed Set Up Labels for Electro-Mechanical Controls
Service Access for Supply Fan and Motor
HORIZONTAL APPLICATIONS
Removing the Motor and Fan Assembly
NOTE: Due to press fit design of composite Rotor on Motor, it is
highly recommended that any time a motor is replaced the fan ro-
tor is replaced as well. The rest of the assembly may be reused.
1. Unplug motor harness from control box harness. See Fig. 25.
2. Unplug connectors from stator temperature limit switch. See
Fig. 25.
3. Remove three screws from each of the quarter round stator
retention brackets. See Fig. 26.
4. Slide fan assembly out of the panel opening that is being
used. Side panel access will require the assembly to be angled
to clear the opening. See Fig. 27.
Fig. 25 — Locations of Motor Harness and Stator
Temperature Limit Switch
Factory Setting:
9.0 VDC
Field Setting:
V
Switch Range:
A
B
C
B
A
C
Field Accessories:
ESP in. wg
VDC Calculator
CFM
0.2
5.4
5.8
6.1
6.5
6.8
7.2
7.6
7.9
8.3
1500
1625
1750
1875
2000
2125
2250
2375
2500
0.1
0.4
6.2
6.5
6.8
7.1
7.4
7.7
8.0
8.4
8.7
0.1
0.6
6.9
7.1
7.4
7.7
7.9
8.2
8.5
8.8
0.1
0.8
7.5
7.7
8.0
8.2
8.5
8.7
9.0
0.1
1.0
8.1
8.3
8.5
8.7
9.0
0.1
1.2
8.6
8.8
9.0
9.2
0.1
1.4
9.1
9.3
9.5
0.1
1.6 1.8 2.0
9.6
0.1Economizer
1 Stage E Heat
2 Stage E Heat
UNIT MODEL NUMBER
4.1 - 7.5
6.9 - 8.7
7.7 - 10.0
0.2
0.3
0.2
0.3
0.2
0.3
0.2
0.3
0.2
0.3
0.2
0.3
0.2
0.3
0.2
0.3
9.8
9.9
9.7
9.99.5
9.7
10.0
9.2
9.5
9.8
9.3
9.69.2
Record field setting here
*
* Overlap in A, B, C switch range
designed for maximum field
adjustment potential. For example
7.2 can be set at either A or B.
Motor Harness
Control Box
Harness
Stator Temperature
Limit Switch