York R-410A - Convergent Drainage; Drainpipe Trap; Upward Drainage (Drain Pump)

Installation
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5.2) Drainpipe Trap
5.2.1 If the pressure at the connection of the drainpipe is negative, it needs to design
drainpipe trap.
5.2.2 Every indoor unit needs one drainpipe trap.
5.2.3 A plug should be designed to do cleaning.
Pl u g
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5.3) Upward drainage (drain pump)
To ensure the gradient 1/100, the drainpipe can be lifted to 340mm. After upwards, place
downwards, or it will cause malfunction to drain pump.
5.4) Convergent drainage
5.4.1 The number of indoor units should be as small as possible to prevent the traverse main
pipe overlong.
5.4.2 Indoor unit with drain pump and indoor unit without drain pump should be in different
drainage system.
5.4.3 Selection the diameter
Number of connecting indoor units→Calculate drainage volume→Select the diameter
Calculate allowed volume =Total cooling capacity of indoor units (HP) ×2 (l/ hr)