BOSCH QV/WQ Series Blower Motor Module Replacement Instructions
- June 3, 2024
- Bosch
Table of Contents
BOSCH QV/WQ Series Blower Motor Module Replacement
BLOWER MOTOR MODULE REPLACEMENT INSTRUCTIONS FOR QV/WQ SERIES
Introduction
This document shows step-by-step instructions that will assist in the removal and replacement of the Blower Motor Module for QV and WQ Series.
Warnings
Warnings in this document are identified by a warning triangle printed against a gray background. Keywords at the start of the warning indicate the type and seriousness of the ensuing risk if measures to prevent the risk are not taken.
The following keywords are defined and can be used in this document:
- DANGER indicates a situation that, if not avoided, will result in death or serious injury.
- WARNING indicates a situation that, if not avoided, could result in death or serious injury.
- CAUTION indicates a situation that, if not avoided, could result in minor to moderate injury.
- NOTICE is used to address practices not related to personal injury.
Important Information
This symbol indicates important information where there is no risk to property
or people.
SAFETY WARNINGS
DANGER: PERSONAL INJURY HAZARD
Before performing service turn off electrical power to unit and observe the
proper process of locking-out power at the main/disconnect box and follow all
safety precautions outlined in unit’s IOM before performing any repairs to
unit.
WARNING: PERSONAL INJURY HAZARD
Installation and servicing of this equipment can be hazardous due to system
pressure and electrical components. Only trained and qualified personnel
should install, repair, or service the equipment.
WARNING: PERSONAL INJURY HAZARD
When working on equipment, always observe precautions described in the
literature, tags, and labels attached to the unit. Follow all safety codes.
Wear safety glasses and work gloves.
Tools required
- 1/4” & 5/8” drivers
- 9mm Socket
Instructions
Step 1. Turn off power to the unit and apply “Lock Out Tag Out” procedure.
-
Remove main unit access panel to remove line voltage connections and ensure there is no power supply to the lines.
-
Step 2. Remove blower access panel to locate the Blower Motor Module to be replaced. (See Fig. 1a & 1b)
Fig. 1a Blower Access Panel for Vertical unit configuration
Fig. 1b Blower access Panel for Horizontal unit configuration -
Step 3. Remove the Motor Module mounting bracket with module and place on the divider (vertical configuration) or unit base (horizontal configuration).
Fig. 2 Mounting Bracket Screw Locations (vertical unit configuration shown) -
Step 4. Release the Motor Module from the mounting bracket by removing the 9mm nuts (qty 2) on the back of the bracket.
-
Step 5. Remove module cover to access the control module by removing the front bolts held on by the remaining 9mm nuts (qty 2) on the back of the module.
Fig.5 Removing Motor Module cover -
Step 6. Unplug the three electrical harness connectors attached to the control module.
Note: The ground screw on the module cover does not need to be removed.
Fig.6 Unplugging electrical connections -
Step 7. The module cover and the three electrical harnesses remain in the unit in preparation to connect the new control module. The old control module can be discarded.
Fig.7 After the harness is unplugged, module cover and harness are separated from the control module
WARNING: PERSONAL INJURY HAZARD
Ensure wiring is clear from all hazards inside the unit. Route wiring avoiding
sharp edges. New Blower Motor Module Installation
Step 8. On the new/replacement Motor Module, separate module cover from
the control module following step 5.
Step 9. Remake the electrical connections removed on step 6 onto the
replacement control module (Refer to Fig. 7).
Step 10. Secure module cover and reinstall the module onto the mounting
bracket using the bolts and corresponding nuts previously removed (refer to
steps 4 & 5). Make sure the new Blower Motor
Module is mounted with the electrical harness plug connector facing down. See
Fig. 8.
DO NOT overtighten nuts on bolts.
Step 11. Reinstall the mounting bracket into the unit.
Step 12. Reinstall unit panels.
Fig.8 Final Installation, electrical harness connections facing down.
If you have any questions regarding the information provided in this document, please contact the Bosch Technical Support Department by phone at 1-800-283-3787, or via email at [email protected]
- 8733833021 (2022/07)
- Subject to change without prior notice