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__ __ __ __ __ Field Wired
____________ Factory Wired
__ _______ __ Field Piping
__ __ __ __ __ Field Wired
____________ Factory Wired
__ _______ __ Field Piping
NEEDS LEGEND
NEEDS LEGEND
RESERVOIR
WATER
LEVEL
NP
TIMER
FREEZE
STAT
1/2 NPT
FLOAT
VALVE
FV
1 1/2 NPT
OVER
FLOW
115 VOLT
1 PHASE
3/4 NPT
UNIT SUPPORT
BY OTHERS
ROOF LINE
SOLENOID DUMP
VALVE N.O.
COLD WATER
SUPPLY
B TV
DR
OF
DV
SOLENOID 3 WAY VALVE, A N.C., C N.O.
TO BLDG.
DRAIN BY OTHERS
FL
WATER VALVE
BY OTHERS
WV A
TO NEUTRAL
DV
WHT
YEL
FZ
RED
TM1
GRN
WHT
WHT
PUMP MOTOR
CONTROL RELAY
RED
PUMP MOTOR
BLU
PUMP MOTOR
CONTROL RELAY
CONTACTS
RED
FL
BLK
TO CONTROL
CONTACTS
TO 115 VOLT
SUPPLY
BLK
TIMER MOTOR
TERMINALS IN EVAPORATIVE
COOLER.
BLK
TM
WP
RESERVOIR
WATER
LEVEL
FL
WP
TIMER
1 1/2 NPT
FLOAT
VALVE
FV
1 1/2 NPT
OVER
FLOW
115 VOLT
1 PHASE
3/4 NPT
UNIT SUPPORT
BY OTHERS
DR
OF
SOLENOID DUMP 
VALVE N.O.
WATER VALVE BY OTHERS
TO DRAIN BY OTHERS
ROOF LINE
WV
COLD WATER SUPPLY
MANUAL SHUT
OFF VALVE WITH
DRAIN PLUG
WATER CONSERVATION
SOLENOID VALVE - N.C.
SV
DV
FILL VALVE
TO NEUTRAL
DV
TM
TO CONTROL
CONTACTS
TO 115 VOLT
SUPPLY
BLK
TM1
YEL
TERMINALS IN EVAPORATIVE
COOLER
BLK
TIMER MOTOR
PUMP MOTOR
CONTROL RELAY
CONTACTS
FL
RED
RED
PUMP MOTOR
CONTROL RELAY
WHT
WHT
GRN
WHT
BLU
WP
TM
BLK
PUMP MOTOR
- 5 -
SOLENOID & TIMED DRAIN VALVE WITH FREEZE
PROTECTION START UP PROCEDURE
1.
2.
3.
4.
5.
6.
OPEN MANUAL SHUT OFF ALVE (WV).
WHEN EVAPORATIVE COOLER IS ACTIVATED IT CLOSES DUMP 
VALVE (DV). 3 WAY VALVE (TV) OPENS AND ALLOWS FRESH 
WATER TO FLOAT VALVE. WATER PUMP (WP) WILL START AS 
SOON AS FLOAT SWITCH (FL) CLOSES. WATER PUMP (WP) 
SHOULD BE WIRED SO THAT PUMP CANNOT RUN WITHOUT 
BLOWER MOTOR IN OPERATION.
FLOAT VALVE (FV) ALLOWS FRESH WATER TO ENTER 
RESERVOIR.
TIMER (TM) BREAKS CIRCUIT TO DUMP VALVE (DV) N.O. FOR 
DAILY SEDIMENT REMOVAL. 3 WAY VALVE (TV) WILL NOT 
ALLOW SUPPLY SUPPLY WATER TO FLOAT VALVE (FV) DURING 
CYCLE. TIMER IS SET FOR 1 1/2 HOUR MINIMUM FOR DRAINING 
RESERVOIR.
FREEZE STAT (FZ) PROVIDES FREEZE PROTECTION BY 
AUTOMATICALLY DRAINING RESERVOIR THRU DUMP VALVE 
(DV), AND DRAINING COLD WATER SUPPLY FROM FLOAT VALVE 
(FV) THRU N.O. PARTS OF 3 WAY VALVE (TV).
UNIT CAN BE USED WITH BLOWER ON AND EVAPORATIVE 
COOLER PUMP OFF.
OPEN MANUAL SHUT OFF VALVE (WV).
WHEN EVAPORATIVE COOLER IS ACTIVATED IT OPENS WATER 
CONSERVATION SOLENOID VALVE (SV), CLOSES N.O. DUMP 
VALVE (DV). WATER PUMP (WP) WILL START AS SOON AS FLOAT 
SWITCH (FL) CLOSES. WATER PUMP (WP) SHOULD BE WIRED SO 
THAT PUMP CANNOT RUN WITHOUT BLOWER MOTOR IN 
OPERATION.
FLOAT VALVE (FV) ALLOWS FRESH WATER TO ENTER 
RESERVOIR.
TIMER (TM) BREAKS CIRCUIT TO DUMP VALVE (DV) N.O. FOR 
DAILY SEDIMENT REMOVAL. WATER CONSERVATION SOLENOID 
VALVE (SV) N.C. WLL NOT ALLOW SUPPLY WATER TO FLOAT 
VALVE (FV) DURING CYCLE. TIMER IS SET FOR 1 1/2 HOURS 
MINIMUM FOR DRAINING RESERVOIR.
UNIT CAN BE USED WITH BLOWER ON AND EVAPORATIVE 
COOLER PUMP OFF.
1.
2.
3.
4.
5.
SOLENOID & TIMED DRAIN VALVE KIT
START UP PROCEDURE
TV
TM
FS