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OPT-AS3,4,5,8 (07-22) 160202-B
AquaSaver Timed Metering Control System Connections
•
If the cooling module is equipped with a timed metering system, connect a 1/2-inch water line to the fitting on the
side of the cooling module.
•
Due to various water pressures and installation conditions, the water supply line may bang abruptly when the solenoid
valve in the AquaSaver system closes. This banging can be minimized by installing a water hammer arrestor in
the supply line. If installing an optional water hammer arrestor, select an indoor (>32°F) location, either horizontal
or vertical, in line with and as close to the solenoid valve as possible. Follow the manufacturer’s instructions to
install and maintain the water hammer arrestor.
•
A freeze protection kit is available for a module with a timed control system. It includes a two-way valve and is
shipped separately for field-installation.
Shutoff and Drain Connections
•
To allow the water supply to be turned on and off, a manual water shutoff should be installed upstream of the inlet
at a convenient non-freezing location. If necessary, install a bleed line between the manual valve and the cooling
module inlet to allow drainage of the line between the shutoff valve and the cooling module.
•
All cooling modules are equipped with an overflow and drain fitting. The fittings are in the cabinet bottom and come
complete with a locknut and a sealing gasket. Check these fittings for tightness before installing the overflow and
drain piping. The drain and overflow fitting will accommodate a 3/4-inch garden hose thread and is tapped with a
1/2-inch female pipe thread for iron pipe.
Bleed Line Connection
NOTE: Adequate bleed-off is important to maintaining an efficiently-operating evaporative cooling
system. Discharging a quantity of water by bleed-off will limit undesirable minerals in the water
from being circulated through the cooling module. Mineral buildup occurs because evaporation
releases only pure water vapor, which causes the concentration of contaminants in the water to
increase as the evaporation process continues. The minerals accumulate on the media, in the water
lines, on the pump, and in the reservoir.
•
Install a bleed line on cooling modules equipped with pump and float controls only—does not apply to modules
with AquaSaver timed controls.
•
Thread the 1/4 ID × 1/2 NPT nylon bleed line fitting (shipped in the cooling module’s bottom pan) into the female
). Connect a 1/4 ID hose to the barb and run to the nearest drain.
Figure 12. Bleed Line Connection
BLEED LINE
CONNECTION
