Trane Climate Changer T Series Installation Operation & Maintenance page 51

Figure 36. Drain pan trapping for section under negative pressure
Figure 37. Drain pan trapping for section under positive pressure
CLCH-SVX06A-EN • T-Series Climate Changer Air Handler IOM
L = H + J + pipe diameter
where:
H = 1 inch for each inch of negative
pressure* plus 1 inch
J = 1/2 H
*Negative pressure = total unit static
pressure at worst case (loaded filters)
minus external pressure
L = H + K + pipe diameter
where:
K = 1/2 inch (minimum)
H = 1/2 inch plus the total unit
static pressure at worst case
(loaded filters)
Normal operation
L
L
Installation - Piping
H
J
K
H
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