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20 Vertical Air Handling Unit
Installation
• The drainage performance has to be optimized by installing both primary and secondary drain lines
along with properly sized condensate traps in order to prevent property damage.
• Care should be taken to avoid the blocking of filter access panel while connecting condensate drain
lines. The primary and secondary condensate traps has to be primed after connecting to the drain
pan.
※ A field supplied external condensate pan has to be installed underneath the entire unit if the
unit is above the living space . Other wise damage may result due to condensate over flow.
Also a additional external condensate line should run from unit in to the pan.
• The entire condensate should be drained from the external condensate pan to some noticeable
area. It is advised to install traps in condensate lines as near to the coil as possible. The outlet of
each trap should be below its connection to the condensate pan avert condensate from overflowing
drain pan.
• If located above the living area then all traps should be prime and insulated and also tested for
leakage.
• PVC 3/4 inch(19.05 mm) male pipe thread fitting is advised to use at condensate pan with gentle tight.
• For easy drain flow the drain hose has to be pointed downward.
• Care should be taken to not use pipe joint connection or PVC/CPVC for units drain line connection.
Use only Teflon tape.
• For preventing winter freeze up on condensate line special means should be provided for drainage.
Condensate Drain
Case Ⅰ (Upflow/Downflow)
Case Ⅱ (Right/Left)
Field supplied
drain pan
Drain piping
Field supplied
drain pan
Drain piping
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