Air Cooler Drain Pan, Drainage Pipe & Drainage Heating Anti-freezing Design

Air Cooler Drain Pan, Drainage Pipe & Drainage Heating Anti-freezing Design

Drain pan collects melted defrost water from air cooler coil; drain pipe guides wastewater out of cold room without ice blockage. Water from defrost is above zero when generated, but inside low-temperature cold room drain line quickly cools down and freezes, blocking water outflow. Drain heater cable wraps around drain pan and drain pipe; it keeps temperature above 0℃ during defrost cycle to ensure water flows out completely. Drain pipe must have continuous downward slope ≥2%; horizontal or upward trap easily traps residual water and forms ice plug. Xiteliduo air cooler HS 84186120 equips drain pan heater as standard for low-temperature models, optional for medium temperature cold room. Air cooler for high humidity seafood cold room has larger drain pan capacity; defrost water volume is far higher than ordinary frozen storage. Drainage outlet should be placed outside cold room envelope; inside buried drain pipeline is hard to maintain and thaw once frozen. Drain pipe should not connect directly to sewage main; water seal bend is required to stop warm humid air and odor flowing backward into cold room. Air cooler drain heater only energizes during and shortly after defrost; continuous heating all day adds unnecessary heat load to cold room. Refrigeration maintenance & repair company clears drain pan sludge regularly; organic sediment accelerates bacteria growth and slowly narrows drainage channel.

FAQ

1. What is the function of drain heater cable on air cooler? Prevent melted defrost water from freezing inside drain pan and pipe.
2. What minimum slope requirement for air cooler drain pipe? ≥2% continuous downward slope.
3. Where is the best position for drain pipe outlet? Outside the cold room insulation envelope.
4. Why add water seal bend on drain outlet? Block warm moist air and smell backflow into cold room.
5. Does medium temperature air cooler always need drain heater? Optional, low-temperature air cooler comes with drain heater as standard.
6. What problem if drain pipe is blocked by ice? Defrost water overflows from drip tray and leaks inside cold room.
7. When should drain heater be powered on? During defrost and a short holding period after defrost ends.
8. What causes slow drainage besides ice block? Sludge and organic dirt accumulated inside drain pan.