Hastings EC-40 User manual

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-

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 [phone] · Fax [phone]
www.hastingshvac.com
E-mail: [email protected]