Walk in freezer 404a -12 degree box temp drain line freezing and pan??
I shut down box to defrost and cleared condensate line and is insulated but keeps freezing what next?
Re: Walk in freezer 404a -12 degree box temp drain line freezing and pan??
Is the drain line heater working and /or drain clear of blockages? If not water will back up into the drain pan. Is the fall correct on the drain line?
Re: Walk in freezer 404a -12 degree box temp drain line freezing and pan??
Is there a trap fitted? If not warm air will freeze inside the pipe!
Re: Walk in freezer 404a -12 degree box temp drain line freezing and pan??
Try some self regulating heat tape like you would use on gutters for a house to keep them from freezing.