gohastings.com EC-40 - Manual (Page 4)

115 VOLT
1 PHASE
1 1/2 NPT
3/4 NPT
UNIT SUPPORT
BY OTHERS
MANUAL DRAIN VALVE
BY OTHERS
ROOF LINE
TO DRAIN BY OTHERS
WATER VALVE BY OTHERS
FRESH WATER
SUPPLY
WATER
LEVEL
RESERVOIR
BLEED OFF
VALVE
FLOAT VALVE
1/2 NPT
OVER FLOW
OF
DR
DV
WV
WP
FV
TO NEUTRAL
PUMP MOTOR
CONTROL RELAY
GRN
WHT
PUMP MOTOR
RED RED
PUMP MOTOR
CONTROL RELAY
CONTACTS
TO CONTROL CONTACTS
BLU
FL
- 4 -
NEEDS LEGEND
__ __ __ __ __ Field Wired
____________ Factory Wired
__ _______ __ Field Piping
the electrical wiring with all applicable local, state, or provincial and national ordinances and codes.
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.
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.
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.
Now proceed to the "Operation" part of this manual and read about the unit that you have purchased.
3.
4.
5.
6.
CAUTION: must comply
OPERATION
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
1.
2.
3.
4.
5.
6.
OPEN MANUAL SHUT OFF VALVE (WV).
MANUAL DRAIN VALVE (DV) IS CLOSED.
FLOAT VALVE (FV) ALLOWS FRESH WATER TO ENTER
RESERVOIR.
WATER PUMP (WP) WILL START AS SOON AS FLOAT
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
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
EVAPORATIVE COOLER PUMP OFF.