Water Make Up Valve - EVAPCO ATC-E Operation And Maintenance Instruction

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 Table 3 for unit specific levels.
Evaporative Condenser
Model Number
ATC-E & eco-ATC Products
187E to 3714E
eco-ATC Products
CATC Products
LRC Products
LSC-E Products
400 to 515, 800 to 1030
550 to 805, 1100 to 1610
PMC-E Products
332E to 1985E
* Measured from lowest point on basin floor.
** Not available on eco-ATWE.
At initial start up or after the unit has been drained, the unit must be filled to the overflow level. Overflow is above the normal
operating level and accommodates the volume of water normally in suspension in the water distribution system and the riser
piping.
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.

Water Make Up Valve

A mechanical float valve assembly is provided as standard
equipment on the evaporative cooling unit (unless the unit has
been ordered with an optional electronic water level control
package or the unit is arranged for remote sump operation). The
make up valve is easily accessible from outside the unit through
the access door or removable air inlet louver. The make up valve
is a bronze valve connected to a float arm assembly and is
activated by a large foam filled plastic float. The float is mounted
on an all-thread rod held in place by wing nuts. The water level
in the basin is adjusted by repositioning the float and all-thread
using the wing nuts. Refer to Figure 12 for details.
ATWB, eco-ATW & eco-ATWE Products
50E to 165E
176 to 4068
181 to 504
25 to 379
36 to 170
185 to 385
—
—
—
175E to 375E
—
–
Table 3 - Recommended Operating Water Level
Operation and Maintenance Instructions
Closed Circuit Cooler
Footprint
3ʼ and 4ʼ wide units**
8.5ʼ wide thru 24ʼ wide
8.5ʼ wide thru 24ʼ wide
CATW Products
7.5ʼ wide units
LRWB Products
3ʼ wide thru 8ʼ wide units
LSW Products
4ʼx6ʼ thru 4ʼx12ʼ
5.5ʼx12ʼ, 5.5ʼx18ʼ
8ʼx12ʼ, 8ʼx24ʼ, 10ʼx12ʼ, 10ʼx24ʼ
8ʼx18ʼ, 8ʼx36ʼ, 10ʼx18ʼ, 10ʼx36ʼ
Dual Fan Sided Units
8ʼx12ʼ, 8ʼx24ʼ
8ʼx18ʼ, 8ʼx36ʼ
PMWQ Products
–
10ʼ and 12ʼ wide units
WDW Products
ESWA Products
8.5ʼ wide thru 14ʼ wide units
Figure 12 – Mechanical Water Make Up Valve
17
Operating
Water Level*
6"
11"
11"
11"
8"
11"
11"
12"
15"
12"
12"
15"
10"
14"
11"
11"
ADJUSTMENT
WINGNUTS
FLOAT ARM
MAKE-UP
FLOAT BALL
VALVE