General • Maintenance

Lennox CB31MV Blower Coils: Maintenance

This maintenance procedure and service must be performed by a qualified installer or service agency. This procedure focuses on checking your equipment's outdoor unit, how to clean and inspect the outdoor coil. Following the recommended maintenance procedure will help you maintain the superior efficiency of your unit for a long period of time.

MaintainX

10/24/2021

Lennox CB31MV Blower Coils: Maintenance

At the beginning of each heating/cooling season, the system should be checked as follows:

A−Filters

To remove filter, loosen the thumb screws holding the filter panel in place. Slide filter out of the guides on either side of cabinet, insert new filter and replace panel. Some models come with a spacer so standard size filters can be used. Filters should be inspected monthly and must be replaced when dirty to ensure proper blower coil operation. See table 14 for replacement filter sizes or see the sticker located on the filter access door specifying the size of the standard throw-away filter which is used

Table 14

B−Supply Air Blower

Check and clean blower wheel.

Motors are prelubricated for extended life; no further lubrication is required.

C−Electrical

Check all wiring for loose connections.

Check circuit breaker located in unit control box.

Check for correct voltage at unit (unit operating).

Check amp-draw using a True RMS ampmeter. Typical clamp−on ammeters do not read current accurately. Motor Nameplate_Actual_

Check to see that heat (if applicable) is operating.

D−Insulation

Outdoor piping insulation should be inspected yearly for deterioration. If necessary, replace with same materials.

Source: Lennox Commercial (tech.lennoxintl.com)