Stulz CeilAir CW - Condensate Pump; Humidifier (Optional); Figure 14. Condensate Pump

37OCH0006F08/13/2024
CEILAIR
®
CW & DX IOM
2.6.4 HUMIDIFIER OPTIONAL
NOTE Optional Humidifier Drain Line
During normal operation, the humidifier drains hot water into the condensate drain line. As an option, a
separate drain line may be provided for the humidifier.
2.6.3.2 Condensate Pump
A condensate pump (Figure 14) is used to automatically remove condensate from the air conditioner and
flush water from the humidifier (if applicable). A P-trap is installed for proper condensate drainage. The height
of the trap is a minimum of 2 in on most standard systems to ensure proper water drainage of the drain pan.
The condensate pump discharge line should be 1/2 in I.D. (maximum) vinyl tubing or 1/2 in O.D. (maximum)
copper pipe to prevent excessive back flow to pump.
Figure 14. Condensate Pump
NOTE Pump Start-up
Pour some water into the condensate drain(s) prior to start-up. This fills the trap and prevents air from
being drawn up the drain lines.
2.6.4 Humidifier (Optional)
CeilAir systems may include an optional electrode steam humidifier. The humidifier empties into the
condensate drain pan during the flush/drain cycle. A water supply line must be connected to the humidifier
copper tubing inlet connection supplied by the factory. Refer to the installation drawing provided with your
unit for the size and location of the connection. The humidifier requires normal tap water as the water supply.
If the supply water is high in particulates, an external filter may be needed.
CAUTION
Do not use demineralized water in the humidifier.
Refer to the humidifier operator’s manual supplied with the OHS unit for complete manufacturer’s information
on the humidifier and for supply water recommendations.