Greenheck Fan 470654 manual Insufficient Airflow, Too Much Airflow

Troubleshooting

Insufficient Airflow

Damper(s) not fully opened?

No

System static losses too high?

No

Blower speed too low?

No

Filters dirty or clogged

No

Leaks in ductwork

No

Belt slipping

Yes

Everything is working properly,

consult factory.

Too Much Airflow

Blower speed too high?

No

Filters not in place?

No

Insufficient external

static pressure?

No

Everything is working properly,

consult factory.

24Model VSU Make-Up Air

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Adjust damper linkage(s), or replace faulty actuator(s).

Damper actuators may take a few minutes to open.

Reduce losses by improving ductwork.

Adjust drives as needed.

Reference: Start-Up - Blower, Air Volume Measurement and Check, pg. 14

Clean or replace filters.

Reference: Maintenance - Routine, Filters, pg. 31

Repair leaks.

Replace or tighten belt.

Reference: Maintenance - Routine, V-Belt Drives, pg. 31

Adjust drives as needed.

Reference: Start-Up - Blower, Air Volume Measurement and Check, pg. 14

Install filters.

Increase external static pressure.

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