Buildermanplumber
Industrial
My vav coils are sweating, what are some possible causes?
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Moisture issues 2
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Buildermanplumber
Industrial
Yes I shut off the heating coil to the vav to lower the air flow temp
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If your hot water coil is sweating, it means the coil surface is below the dew point of the supply air.
Can happen when cold air has been blowing fully on the valved-off coil, then the air temperature rises (perhaps room is satisfied and VAV damper goes almost shut, then room air migrates in there).
Solution: Fix your controls so they work properly, and open the heating coil valve back up. You should be able to operate the box at the appropriate supply air temperature without having to valve off the reheat coil.
Good on ya,
Goober Dave
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Can happen when cold air has been blowing fully on the valved-off coil, then the air temperature rises (perhaps room is satisfied and VAV damper goes almost shut, then room air migrates in there).
Solution: Fix your controls so they work properly, and open the heating coil valve back up. You should be able to operate the box at the appropriate supply air temperature without having to valve off the reheat coil.
Good on ya,
Goober Dave
Haven't see the forum policies? Do so now: Forum Policies
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