Gohastings Com Ec 120 Users Manual ISEC 1 SERVICE

EC-40 ISEC-1 SERVICE MANUAL

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INSTALLATION AND OPERATION

MANUAL

Evaporative Coolers

EC-40, -80, -120, -160, -220, -300, -400,

-500, -600, and -750

N O T I C E

Read These Instructions Before Installation

Upon arrival, inspect the unit for shipping damage and

completeness. If any part is missing or damaged, notify

the carrier immediately. Always refer to the unit’s serial

and model numbers located on the specification plate

when making an inquiry regarding maintenance and

parts. To insure unit integrity, use only Factory

Authorized Replacement Parts.

ISEC-1

July 1997

CONTENTS

Precautions .………………………………………………………………………..................... Page 2

Specifications ………………………………………………………………………................... Page 3

Unit Installation …………………………………………………………………………………..

1. Evaporative Cooler ……………………………………………………...................... Page 3

2. Wiring …………………………………………………………………………………... Page 3

3. Water connections ……………………………………………………………………. Page 4

Operation

1. Standard Unit ………………………………………………………………………….. Page 4

2. Unit with automatic Drain Kit …………………………………………….................. Page 5

3. Unit with Automatic Drain Kit and Freeze Protection ……………………………… Page 5

Service and Parts ………………………………………………………….................. Pages 6 and 7

Trouble Shooting ………………………………………………………………………………... Page 8

PRECAUTIONS

1. Read these instructions before installation and operation; save for future reference. This

manual contains necessary information for safe operation and maintenance of the unit.

2. Shut off main power and lock it in the off position when making repairs or replacements of

components.

3. Use extreme caution when making voltage tests with “live” circuits – follow the

established safety procedures.

4. Electrical repairs should be performed by trained, qualified personnel only. (Failure to

follow safe electrical procedures can result in series injury – or death.)

5. Do not attempt to operate unit by jumping, or otherwise bypassing, any circuit.

6. Keep evaporator reservoir clean. Do not allow fine sediments or scale to accumulate in

reservoir, on filter media, or on other components.

7. Do not exceed water pressures recommended in this manual.

WARNING

This equipment was designed and manufactured with safe operation as

a priority. However, the very nature of any equipment having water and

electrical connections presents hazards to personnel which cannot be

completely safeguarded against.

- 2 -

SPECIFICATIONS

Model (EC) 40 80 120 160 220 300 400 500 600 750

Dry Weight 110 176 225 271 310 373 634 726 845 1067

Operation Weight** 335 560 650 825 880 1135 1680 1930 2085 2635

Pump Cap/GPH req.* 270 360 540 720 720 810 540+ 630+ 630+ 630+

Cap/GPH @ Lift* 387 1135 1135 1135 1135 1100 1080 1080 1060 1060

Pump Lift/ft. 3 4 4 4 4 5 6 6 7 7

* These figures do not include the 3 to 6 percent bleed-off rate required to reduce scaling for standard unit.

**Unit in operation, media fully saturated.

+ Per pump

EC = Evaporative cooler

WATER CONNECTIONS ALL UNITS

1-1/2 FPT Overflow ¾ FPT Drain

½ MPT Bleed-off ½ FPT Float Valve

ELECTRICAL SPECIFICATION

Model (EC) 40 80 120 160 220 300 400 500 600 750

Pump Motor Model CP 1000 5 MSP (2) 5 MSP

HP 1/50 1/6 1/6

Amperage 1.1 A 5.0 A 5.0 A

Voltage 115 V

EC = Evaporative Cooler

APPROXIMATE BLEED-OFF FLOW RATE

Model EC-40 -80 EC-120 -160 EC-220 -300 EC-400 -750

Per Minute ½ to 1 qt. 1 to 2 qt. 2 to 3 qt. 2 (2-3 qt.)

CONSTRUCTION AND MEDIA SPECIFICATION

Celdek Glasdek

Maximum Water Temperature 130ºF 165ºF

Maximum Air Temperature 300ºF 300ºF

pH Range 6-9 6-9

Cabinet Aluminized Steel and Painted

Evaporator Reservoir Stainless Steel and Painted

INSTALLATION INSTRUCTIONS

1. When installing the evaporative cooler, special consideration should be given to the physical positioning of

the unit, electrical power supply, the proper water supply, and the structural members to support the

cooler at the operating weights. It is recommended that supports be placed within every four feet to

distribute the weight evenly. Be sure the supports are level.

2. After the unit is properly located, electrical connection may be made. If the Evaporative Cooler has been

purchased separately, wiring from a 115 volt supply may be connected to the junction box supplied with

the unit. Refer to the wiring schematic supplied in owner’s packet or, pages 4 and 5 of typical wiring

schematics, and to drawings for standard unit, units with automatic drain kit, or units with automatic drain

kit and freeze protection.

When the evaporator cooler is purchased with a system exhaust blower and filter, most connections

may have been made already. Refer to schematic with owner’s packets for any additional wiring to be

done.

-3 -

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.

__ __ __ __ __ 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

Cover Pipe

PVC Distribution Pipe

Distribution Pad

45 Flute

15 Flute

Air Flow

Red Dot Indicates

Position in Unit

SERVICE AND PARTS

Evaporative cooler media may be removed from the rear for cleaning or replacement, as required, by 

removing the upper rear panel. Use only standard garden hose variety, with minimal water pressure, to avoid 

damaging the filter media when cleaning. It would be advisable to replace evaporative cooler media every 

five years on units that are subject to contaminated atmospheres, or where water has a high mineral content.

 Installation of evaporative media requires the 45 deg. angle flutes to slope down toward the air 

entering the pad. Use care in handling the pad to avoid damage.

MEDIA INSTALLATION DETAIL

- 6 -

1 1/4 PLASTIC PLUG 76-24-0018-11

UNIT SIDE PLATE

1 1/4 FEMALE ADAPTOR 76-24-0017-18

STANDARD

BLEED OFF KIT

94-1000-13

(OTHER OPTIONS 

AVAILABLE)

SIDE PLATE

1/2 CONDUIT NUT

78-14-0051-15

3/4 PLASTIC PLUG

76-24-0019-14

FOR DRAIN

3/4 CLEAR PLASTIC TUBING

FLOAT VALVE DETAIL

FLOAT BALL 76-24-0003-17

STEM 76-24-0002-14

1/2 FLOAT VALVE 76-24-0001-11

1" PIPE PVC 76-18-5001-15

1" TEE PVC 76-24-0007-19

1" PIPE PVC 76-18-5001-15

1" COUPLING PVC 76-24-0008-12

1" TO 1/2" REDUCER BUSHING PVC 76-24-0009-15

1/2 NIPPLE (TBE) PVC 76-24-0010-17

1/2 PLASTIC GLOBE VALVE 76-24-0016-15

1/2 MALE ADAPTOR PVC 76-24-0011-10

1/2 PIPE PVC 76-18-5000-12

1/2 90 DEG. ELL PVC 76-24-0012-13

1/2 PIPE PVC 76-18-5000-12

1/2 CONDUIT NUT 78-14-0051-15

1/2 MALE ADAPTOR PVC 76-24-0011-10

1" 90 DEG. ELL PVC 76-24-0013-16

1" PIPE PVC 76-18-5001-15

1" UNION PVC 76-24-0014-19

1" PIPE PVC 76-18-5001-15

1" MALE ADAPTOR PVC 76-24-0015-12

(FIT INTO PUMP 79-31-0001-10)

1" PIPE PVC 76-18-5001-15

1" PVC GATE VALVE 76-24-0045-19

1" PIPE PVC 76-18-5001-15

1" 90 DEG. ELL PVC 76-24-0013-16

1" PIPE PVC 76-18-5001-15

1" PIPE PVC 76-18-5001-15

USED WHEN BLEED OFF KIT

NOT USED

1 1/4 90 DEG. ELL 76-24-0005-13

1 1/4 TO 1 REDUCER BUSHING 76-24-0006-16

1ST HOLE SMALLER DIA THAN THE OTHERS

UNIT HEADER PIPE (HOLES IN TOP)

1 1/4 PVC (POSITION HOLES

CORRECTLY)

"TYPICAL INTERNAL PIPING DIAGRAM"

- 7 -

UNIT SIDE

PLATE

TROUBLE SHOOTING GUIDE

TROUBLE

CHECK-OUT PROCEDURE AND CORRECTION

Green Water……………………….. 1. Usually occurs the first few days of operation; media is being rinsed.

Drain reservoir and refill with fresh water. After a couple of

operations, green should disappear. The 3 to 6 percent bleed-off, for

standard units, will maintain your clear water also.

2. If unit has been in service for a while, algae can grow on the media.

It will not cause deterioration or rot, but may clog the passages and

inhibit the air flow. A commercial algaecide will control the growth

when caught in the early stages.

Foaming Occurs………………….. 1. Some foaming is natural if maintained in the reservoir. If foaming of

the medial occurs after a couple of days of operation, a defoamer

should be added. The exact amount will depend on the severity.

After one application, you will be able to judge how much additional

defoamer to use (see instructions on bottle).

Scaling Occurs……………………. 1. Be sure you have a 3 to 6 percent bleed-off rate (See “Bleed Off

Flow Rates.”) for unit size. If the frost-like scale does appear,

increase water flow by adjusting pump discharge gate valve until it

disappears. The exact amount will depend upon the pH and

hardness of the water and the intensity of evaporation. Clean and

flush distribution header on a regular basis.

Water depositing into Transition

and Reservoir Not Draining……..

1. Reservoir float valve (FV) improperly adjusted (See “Installation

Instructions,” note 4.)

2. Float valve bad, not shutting off. Replace.

3. Check overflow and drain valves for blockage. On models with timed

drain valve, check time clock setting or solenoid valve (DV). Replace

if bad.

4. After initial start-up, look for foaming of the media. If the blower is

pulling foam bubbles off the media into transition, a static pressure or

CFM problem is eminent. (Contact your service or unit

representative.)

Reservoir Dry……………………… 1. Check the manual shut-off valve. Is it open?

2. Is the float valve opening? If not, then readjust float level or replace

valve.

3. Units with conservation water solenoid should be checked. Replace

if bad.

1. Water pump is running without the blower running.

Water Out the Backside of

Evaporative Cooler……………….. 2. Damaged media. Replace.

3. If these problems, contact your service or unit representatives:

A. Lack of CFM.

B. Improper static pressure.

P.O. Box 669 · Hastings, Nebraska 68902-0669

Phone (402) 463-9821 · Fax (402) 462-8006

www.hastingshvac.com

E-mail: sales@hastingshvac.com