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CAUTION:
the electrical wiring
3.
Water connections (refer to "Specifications') should, and must follow, local codes and ordinances. Connections are provided
on each unit with standard pipe thread sizes. Refer to pages 4 and 5 for your system. For units with automatic drain kit and
freeze protection, the minimum pressure should be 10 PSI so valves will operate properly; for other models, 10 PSI or less.
4.
Set the float valve (FV) to allow fresh water to enter reservoir to a depth of 2 1/2" for models EC-40 through EC-750. By
loosening the thumb screw, located on the float valve assembly, and setting the float until the valve shut off is at the de-
signed depth, no other adjustment needs to be made. Do not forget to tighten the thumb screw securely.
5.
You may now start your unit. Watch for the first few times that the media gets completely saturated and that all phases of
operations (See "Operations") are working properly. If necessary adjust the pump discharge gate valve to avoid dry areas
on the media. Water should be visible trickling down the flutes of the media. Watch also for excess foaming (See
"Trouble Shooting") of the water and media.
After a day of operation you will notice the water to be a shade of green. The media is the cause, and the reservoir
should be drained and refilled a couple of times to correct this.
6.
Now proceed to the "Operation" part of this manual and read about the unit that you have purchased.
Refer to the schematic piping and wiring while going through start-up procedure for the particular system you have purchased.
STANDARD UNIT START UP PROCEDURE
OPEN MANUAL SHUT OFF VALVE (WV).
1.
MANUAL DRAIN VALVE (DV) IS CLOSED.
2.
FLOAT VALVE (FV) ALLOWS FRESH WATER TO ENTER
3.
RESERVOIR.
WATER PUMP (WP) WILL START AS SOON AS FLOAT
4.
SWITCH (FL) CLOSES. iF WATER IS TOO LOW PUMP
WON'T RUN. WATER PUMP (WP) SHOULD BE WIRED SO
THAT PUMP CANNOT RUN WITHOUT BLOWER MOTOR IN
OPERATION.
BLEED OFF (BO) TO PREVENT SCALE FORMATION. A
5.
BLEED-OFF AT THE RATE OF 3-6% IS REQUIRED. THE
EXACT AMOUNT WILL DEPEND ON THE pH AND
HARDNESS OF THE WATER, AND THE INTENSITY OF
EVAPORATION.
UNIT CAN BE USED WITH BLOWER ON, AND
6.
EVAPORATIVE COOLER PUMP OFF.
TO CONTROL CONTACTS
PUMP MOTOR
CONTROL RELAY
CONTACTS
RED
must comply
with all applicable local, state, or provincial and national ordinances and codes.
OPERATION
GRN
BLU
WHT
PUMP MOTOR
FL
RED
PUMP MOTOR
CONTROL RELAY
BLEED OFF
VALVE
FLOAT VALVE
FV
RESERVOIR
OVER FLOW
WATER
WP
OF
LEVEL
WV
FRESH WATER
SUPPLY
WATER VALVE BY OTHERS
TO NEUTRAL
- 4 -
115 VOLT
1 PHASE
1/2 NPT
1 1/2 NPT
3/4 NPT
DR
UNIT SUPPORT
BY OTHERS
MANUAL DRAIN VALVE
BY OTHERS
DV
ROOF LINE
TO DRAIN BY OTHERS
NEEDS LEGEND
__ __ __ __ __ Field Wired
____________ Factory Wired
__ _______ __ Field Piping
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