MUA-SVX005B-EN
21
Condensate Drain piping must have a P-trap in line immediately downstream of drain pan
connection, external to the unit, to prevent possible outside air leakage into unit. The P-trap shall
be of sufficient differential to overcome negative pressure of the indoor air blower. A minimum
height difference of 2 inch (51 mm) is required (See Figure 9, p. 21). Before unit operation begins,
prime P-trap with either water (summer) or glycol (winter).
Figure 9. Drain Pan Connection
Evaporative Cooler Equipped Units (Optional)
Refer to Evaporative Cooler Installation and Service Manual for water and electrical connections.
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