Nidec CBA25UHV Gen 2 to Gen 3 Motor Conversion Instruction Manual
- June 15, 2024
- Nidec
Table of Contents
Nidec CBA25UHV Gen 2 to Gen 3 Motor Conversion
INSTALLATION INSTRUCTIONS FOR NIDEC INDOOR BLOWER MOTOR AND CONTROL MODULE REPLACEMENT USED ON CBA25UHV AND EQUIVALENT UNITS
WARNING
Improper installation, adjustment, alteration, service or maintenance can
cause property damage, personal injury or loss of life. Installation and
service must be performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
CAUTION
As with any mechanical equipment, contact with sharp sheet metal edges can
result in personal injury. Take care while handling this equipment and wear
gloves and protective clothing.
WARNING
Electric Shock Hazard! – Disconnect all power supplies before servicing.
Replace all parts and panels before operating. Failure to do so can result in
death or electrical shock.
WARNING
Electric Shock Hazard. Can cause injury or death. Foil-faced insulation has
conductive characteristics similar to metal. Be sure there are no electrical
connections within ½ʺ of the insulation. If the foil-faced insulation comes in
contact with electrical voltage, the foil could provide a path for current to
pass through to the outer metal cabinet. While the current produced may not be
enough to trip existing electrical safety devices (e.g. fuses or circuit
breakers), the current can be enough to cause an electric shock hazard that
could cause personal injury or death.
NOTE – Due to the obsolescence of the Nidec Generation 2 motor platform, repair of older products that utilized this motor requires the replacement of the motor and its controls. Dimensional differences in the new Generation 3 motor require the 16X4 16-pin black programmed motor control box to be mounted on the blower housing. This kit provides the necessary mounting plate, harness and hardware to mount the 16X4 16-pin black programmed motor control box. A new Generation 3 motor with control must be ordered along with a 16X4 16-pin black programmed motor control box listed for the specific air handler in Table 1.
Shipping and Packing List
Package 1 of 1 contains:
- Installation instructions
- 16X4 programmed motor control
- Control-box-to-motor harness
- Motor mounting plate
- Mounting hardware
Application
Use the kit specified in the following table to replace the motor or control module in CBA25UHV and equivalent units.
Motor Removal and Replacement
- Disconnect all electrical power to unit. Wait at least five minutes before beginning service procedures. This will allow internal capacitors to fully discharge, avoiding possible electrical shock.
- Remove the blower access panel.
- Unplug the 5-pin (J48) connector motor power harness from the motor control module and the 16-pin (J49) connector harness from the 16X4 black programmed motor control box located on the end of the motor.
- Remove housing from unit.
- Remove motor assembly from housing.
- Replace motor with Gen 3 motor assembly.
- Set motor band spacing per figure 2.
- Install new motor in housing.
- Install blower assembly.
NOTE – Two kits are required to replace Gen 2 motors. All replacement 16-pin control modules look alike. Make sure the part number is the correct one for the unit.
| Unit | “A” | Unit | “A” |
|---|---|---|---|
| 18 | 1.05 | 42 | 1.88 |
| 24 | 1.05 | 48 | 1.88 |
| 30 | 1.05 | 60 | 1.88 |
| 36 | 1.05 | – – | – – |
IMPORTANT
Generation 2 motors and controls are not compatible with the new Generation 3
motors. All Generation 2 components, motor, control and 16-pin box must be
replaced.
- Install the motor control mounting plate onto blower housing using existing clearance holes on blower wrapper using item 4 (see figure 3). Install mounting plate so that existing 16-pin harness will reach the16X4 16-pin black programmed motor control box
- Install a 16-pin box with item 5 mounting hardware. See Table 1 for correct part number.
- Plug the 5-pin connector (J48) on the existing motor power harness into the jack on the motor control module.
- Install a new harness (item 3) into the 16×4 black programmed motor control module and the 4-pin connector on the motor module located on the motor.
- Reconnect the existing 16-pin harness plug (J49) into the new 16X4 16-pin black programmed motor control box located on the blower housing.
- Restore power to the unit.
NOTE – Orient connections towards return opening.
NOTE – Orient motor connections as shown.
SPECIFICATION
Repair Part for Dash Numbers Built with Gen 2 16 Pin Nidec Motors
__
__
Old Part Number
| __
Model Number (used to convert all dash number)
| __
__
Allied Model Number
| __
__
Allied Model Number
| __
__
Motor HP
| Gen 3 Motor Part Number (16X4 16-Pin Programmed Motor Control Box is not –
Included)
| Gen 3Motor With Motor Control Cat (16X4 16-Pin Programmed Motor Control Box is not
Included)
| __
Coverions kit with 16X4 Programmed Control box, harness mouting plate and hardware
| __
__
Cat #
__
__
104758-19
| __
__
CBA/CBX25UHV-018
| __
BCE5V18MA4X/ BCE5V18MA4X/NAM18V1TA 4
| __
__
BCE3M18V00NA4X/
| __
__
1/2
| __
__
107598-01
| __
__
24Y86
| __
__
626023-02
| __
__
26J46
__
104758-20
| __
CBA/CBX25UHV-024
| BCE524MA4X/ BCE5V24MA4X/NAM18V1TA
4/HCG24V1P
| BCE3M24V00NA4X/ HCG24V1M| __
1/2
| __
107598-01
| __
24Y86
| __
626023-03
| __
26J54
__
104758-21
| __
CBA/CBX25UHV-030
| BCE530MA4X/ BCE530MA4X/NAM30V1TA4/
HC30V1P
| __
BCE3M30V00NA4X
| __
1/2
| __
107598-01
| __
24Y86
| __
626023-04
| __
26J56
__
104758-22
| __
CBA/CBX25UHV-036
| BCE5V36MA4X/ BCE5V36MA4X/NAM36V1TA
4/HCG36V1P
| BCE3M36V00NA4X/ HCG36V1M| __
1/2
| __
107598-01
| __
24Y86
| __
626023-05
| __
26J57
__
104758-23
| __
CBA25UHV-042
| BCE5V42MA4X/
BCE5V42MA4X/NAM42V1TA 4/HCG42V1P
| __
N/A
| __
1
| __
107598-03
| __
24Y89
| __
626023-06
| __
26J58
__
104758-24
| __
CBA25UHV-048
| BCE5V48MA4X/ BCE5V48MA4X/NAM48V1TA
4/HCG48V1P
| __
N/A
| __
1
| __
107598-03
| __
24Y89
| __
626023-07
| __
26J59
__
104758-25
| __
CBA25UHV-060
| BCE5V60MA4X/ BCE5V60MA4X/NAM60V1TA
4/HCG60V1P
| __
N/A
| __
1
| __
107598-03
| __
24Y89
| __
626023-08
| __
26J60
__
104758-05
| __
CBX25UHV-042
| __
N/A
| __
BCE3M42V00NA4X/ HCG42V1M
| __
3/4
| __
107598- 02
| __
24Y88
| __
626023- 09
| __
26J61
__
104758-06
| __
CBX25UHV-048
| __
N/A
| __
BCE3M48V00NA4X/ HCG48V1M
| __
1
| __
107598- 03
| __
24Y89
| __
626023- 10
| __
26J62
__
104758-07
| __
CBX25UHV-060
| __
N/A
| BCE3M60V00NA4X/ HCG60V1M| __
1
| __
107598- 03
| __
24Y89
| __
626023- 11
| __
26J63
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