Greenheck Fan 452413 - Manual (Page 37)

37 Canopy Hood
®
Troubleshooting
Problem: Smoke blows away before reaching the bottom of the hood.
Are there pass-thru windows near
the hood?
Adjust amount and locations of make-up air to eliminate drafts
through the pass-thru windows.
Is this an air curtain hood? Turn off or reduce the amount of make-up air.
Is the make-up air part of the hood
or an attached plenum?
Try turning off or reducing the amount of make-up air; block off
portions of the supply to direct air away from the problem area (test
with cardboard).
Problem: Pilot lights are being blown out or cooking equipment is being cooled by make-up air.
Are there drafts from make-up air?
Try turning off or reducing the amount of make-up air; block off
portions of the supply to direct air away from the problem area (test
with cardboard first); remove any obstructions in front of supply that
directs air toward cooking equipment.
Problem: Cold air can be felt by the cook at the hood.
Is this a short circuit hood? Turn off or reduce the amount of air supplied to short circuit.
Is this an air curtain hood?
Turn off or reduce the amount of air supplied to the air curtain; heat
the supply air.
Is the make-up air part of the hood
or an attached plenum?
Try turning off or reducing the amount of make-up air; heat the
supply air.
Problem: The kitchen gets hot.
Is the hood capturing?
Hood is not drawing enough air, see sections above on fan
performance and hood capture.
Is this an air curtain hood? Turn off or reduce the amount of air supplied to the air curtain.
Is the make-up air part of the hood
or an attached plenum?
Try turning off or reducing the amount of make-up air; cool the
supply air.
Problem: Cooking odors in the dining area.
Is the hood capturing?
Hood is not drawing enough air, see sections above on fan
performance and hood capture.
Is there a draft through doors between
the kitchen and dining area?
Decrease make-up air in the kitchen; increase exhaust air through
hood.
Problem: Grease is running off the hood.
Is there grease on top of the hood? Exhaust duct is not correctly welded.
Is the caulk missing or damaged? Clean problem area and re-caulk.
Is the grease cup inserted properly? Put grease cup back in place.
Problem: Hood is noisy.
Is the fan running in the correct direction? See exhaust fan troubleshooting section.
Are the filters in place?
Replace missing filters.
Is the hood over exhausting? Slow down fan (see exhaust fan troubleshooting section)