14
Cold Water Basin
Thecoldwaterbasinshouldbeushedoutquarterly,andcheckedmonthlyormoreoftenif
necessary, to remove any accumulation of dirt or sediment which normally collects in the basin.
Sedimentcanbecomecorrosiveandcausedeteriorationofbasinmaterials.Whenushingthe
basin, it is important to keep the suction strainers in place to prevent any sediment from entering
the system. After the basin has been cleaned, the strainers should be removed and cleaned
beforerellingthebasinwithfreshwater.
Operating Level of Water in Cold Water Basin
The operating level should be checked monthly to make sure the water level is correct. Refer to
Table3forunitspeciclevels.
Model Number Operating
Level*
AT 14-64 through 14-912 180 mm
AT 18-49 through 38-942 230 mm
AT 19-56 through 19-98 230 mm
AT 110-112 through 310-954 230 mm
AT 112-012 through 312-960 230 mm
AT 114-0124 through 314-1272 280 mm
AT 26-517 through 28-917 230 mm
AT 212-59 through 212-99 230 mm
AT 215-29 through 215-99 230 mm
AT 216-49 through 216-914 230 mm
AT 220-112 through 220-918 230 mm
AT 224-018 through 224-920 230 mm
AT 228-0124 through 428-1248 280 mm
AT 420-124 through 424-936 280 mm
LSTE
LSTE
LSTE
LSTE
416
5112
8P-112
10-112
through
through
through
through
4612
5718
8P-536
10-636
230 mm
230 mm
230 mm
330 mm
LPT 316 through 8812 200 mm
PMTQ 10112 through 12924 330 mm
*Measured from lowest point in the basin
Table 3 – Recommended Operating Water Level
Atinitialstartuporaftertheunithasbeendrained,theunitmustbelledtotheoverowlevel.
Overowisabovethenormaloperatinglevelandaccommodatesthevolumeofwaternormallyin
suspension in the water distribution system and some of the piping external to the unit.
The water level should always be above the strainer. Check by running the pump with the fan
motors off and observing the water level through the access door or remove the air inlet louver.