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System Sizing for Spas

System Sizing 
Use these three formulas to calculate the volume of water in the spa: 

Rectangular: 

Length(M) x Width(M) x Average Depth(M) x1000 = Total Litres 

 

Length(Ft) x Width(Ft) x Average Depth(Ft) x7.5 = Total U.S. Gallons 

 
Round: 

3.14 x Radius (M) x Radius (M) x Average Depth (M) x 1000 = Total Litres 

 

3.14 x Radius (Ft) x Radius (Ft) x Average Depth (Ft) x 7.5 = Total U.S. Gallons 

 
Free Form: 

Average Length (M) x Average Width (M) x Average Depth (M) x 1000 = Total Litres 

 

Average Length (Ft) x Average Width (Ft) x Average Depth (Ft) x 7.5 = Total U.S. Gal. 

 

IMPORTANT CONCEPTS

1 . Sanitizer Demand 

The rate at which sanitizer is consumed in any spa depends on the relationship of eight major variables. 
Since these variables can vary widely from spa to spa and season to season, precise prediction of the 
sanitizer 

demand 

for

 

any one spa is difficult. At the end of this section, rules of thumb are provided for the 

EcoClean System Sizing. 

THE VARIABLES ARE: 
1.   Volume and surface area of the spa being sanitized.

2.

 

Average water temperature maintained: As the temperature of the water increases, the sanitizer 

demand 

will

 

also increase. As the temperature of the water decreases, the sanitizer 

demand will 

also 

decrease. When this happens, the output dial should

 

be decreased to compensate for this lower 

demand 

(which will also protect your equipment from excessive levels of sanitizers). 

3.  Cyanuric acid level

 

maintained: This chemical, when added to your outdoor spa water, significantly 

inhibits sanitizer depletion from exposure to sunlight. Cyanuric acid also inhibits corrosion if your spa is 
equipped with any metal components. Minimum levels or better must be maintained to ensure that the 
sanitizer being produced is protected from UV breakdown. 

4.  Bather load: As the bather load increases, the sanitizer

demand 

will also increase. 

5.

 

Amount of direct sunlight / UV exposure:  Spas exposed to larger amounts of direct sunlight are more 
vulnerable to increased sanitizer loss and algae growth.  Indoor or screened spas have less sanitizer 
demand. 

6.

 

Exposure to vegetation and airborne debris: Dense landscaping near the spa, along with increased nitrate 
levels (urine, bird droppings, fertilizer, well water, etc.) greatly contribute to increased sanitizer demand. 

7.

 

Chemical dilution: Virtually all spa chemicals experience dilution through rainfall, adding of fresh 
make-up water due  to evaporation, splash-out, filter backwashing, leaks, etc. When freshwater is 
added, sanitizer 

demand 

increases for a brief period. 

8.

 

Main filter pump runtime and your spa's circulation patterns:  Waterfalls/Fountains and other water 
features operated by the filter pump can directly effect sanitizer 

demand.  

The main filter pump runtime 

and/or output dial may need to be increased to satisfy this higher 

demand. 

COAST SPAS EcoClean  Production Capacity

 

Section 1 a 

Summary of Contents for EcoClean

Page 1: ...CTS ACT This cell must only be used on this model of chlorine generating device Read the Label and the Installation and Operation Manual of the chlorine generating device Coast Spas EcoClean unit before using Coast Spas Manufacturing Inc 6315 202 Street Langley BC V2Y 1N1 PHONE 604 514 8111 EcoClean Cell Label ENGLISH Oct 2008 13 DEC 2010 2010 5304 ...

Page 2: ...uivalent to 15 grams of free available chlorine per day Controls Bacteria in Spa Water Always maintain 3 5 ppm of free available chlorine or bromine in your spa water DOMESTIC READ THE LABEL AND THE INSTRUCTION MANUAL BEFORE USING KEEP OUT OF REACH OF CHILDREN Warning Operating the EcoClean without water flow through the cell can cause a build up of flammable gases which can result in FIRE or EXPL...

Page 3: ...PEST CONTROL PRODUCTS ACT Maximum output equivalent to 15 grams of free available chlorine per day One EcoClean unit can treat a maximum of 1500 Litres of spa water Controls Bacteria in Spa Water EcoClean us C Coast Spas Manufacturing Inc EcoClean English Manual Oct 2008 IMPORTANT READ THE LABEL AND THE INSTALLATION OPERATION MANUAL BEFORE USING Coast Spas Manufacturing Inc 6315 202 Street Langley...

Page 4: ...n 1 a System Sizing 3 4 1 b Spa Water Preparation Monitoring 5 6 Section 2 Installation Requirements 2a Power Supply Cell Installation 7 8 2b Equipment Dimensions 9 Section 3 Start Up Operation 3a Power Supply Functions 10 11 3b Start Up Sequence 11 Section 4 Trouble Shooting 4a Trouble Shooting the EcoClean 12 Appendix Service Information 13 ...

Page 5: ...ectrical outlet 110VAC ONLY 4 WARNING Do not use spas or hot tubs unless all suction grates are installed to prevent body and hair entrapment 5 DANGER To reduce the risk of drowning from hair and body entrapment install suction fittings with a marked flow rate that equals or exceeds the flow rate on the equipment assembly 6 WARNING Install blower no less than 30cm 1 foot above the maximum water le...

Page 6: ...t use extension cords to connect unit to electric supply provide a properly located outlet 5 Do not bury cord Locate cord to minimize abuse from lawn mowers hedge trimmers and other equipment 6 Warning Operating the EcoClean without water flow through the cell can cause a build up of flammable gases which can result in FIRE or EXPLOSION General Use 1 WARNING To reduce the risk of injury do not per...

Page 7: ...g 9 Obese persons and persons with a history of heart disease low or high blood pressure circulatory system problems or diabetes should consult a physician before using a spa hot tub 10 Persons using medication should consult a physician before using a spa or hot tub since some medication may induce drowsiness while other medication may affect heart rate blood pressure and circulation 11 Do not us...

Page 8: ...l Maximum output equivalent to 15 grams of free available chlorine per 24 hours max dial setting of 100 Reverse Polarity Function The Reverse Polarity Function is designed to automatically clean the cell blades maximizing the cell s ability to manufacture chlorine or bromine This feature is only enabled when the AC power is on and the L E D light displays a solid GREEN color The unit reverses pola...

Page 9: ...o protect your equipment from excessive levels of sanitizers 3 Cyanuric acid level maintained This chemical when added to your outdoor spa water significantly inhibits sanitizer depletion from exposure to sunlight Cyanuric acid also inhibits corrosion if your spa is equipped with any metal components Minimum levels or better must be maintained to ensure that the sanitizer being produced is protect...

Page 10: ...on This amount of chlorine could satisfy up to 1 500 L 400 U S gallons of spa water depending on the 8 demand variables for sanitizer NOTE Residual salt levels must be maintained above 2800 ppm and below 3200 ppm Do not exceed 3200 ppm salt residual if you object to salty tasting water Normal System Sizing Guide The sizing criteria below reflects normal conditions based on field experience and pro...

Page 11: ...n the next page Before adding salt to a spa hot tub for the first time turn your EcoClean unit OFF then pour salt around the perimeter of the spa NOTE Homeowners with water softening treatment equipment which utilize salt may already have sub stantial levels of salt in their drinking water So before adding this water to your spa test the level of salt then determine the amount of salt still needed...

Page 12: ... to add Note Indoor or bromine spas do not require the addition of CYA Cyanuric Acid Needed for 75 PPM Section 1 b 6 POUNDS OF SALT NEEDED FOR 3000 PPM RESIDUAL Salt Level Tub Volume in U S Gallons Before Addition 100 200 300 400 0 ppm 2 5 5 0 7 5 10 0 300 ppm 2 3 4 5 6 8 9 0 600 ppm 2 0 4 0 6 0 8 0 900 ppm 1 7 3 5 5 3 7 0 1200 ppm 1 5 3 0 4 5 6 0 1600 ppm 1 2 2 4 3 5 4 7 1900 ppm 93 1 9 2 8 3 7 2...

Page 13: ... the wall installation The cell should be placed into the footwell of the spa Diagram 1 Where the EcoClean unit is a factory installed option the cell will be mounted into a standard spa fitting and installed directly into the wall of the spa The in wall model includes a DC cell cord with spade connectors to allow for future servicing of the power supply Diagram 2 7 UNIT WITH CELL ATTACHED FOR OVE...

Page 14: ...Section 2 a Power Supply and Cell Installation Continued Diagram 2 SPADE CONNECTORS TO DC CABLE CELL BLADES SPA WALL Model C1 IW Cell UNIT WITH IN WALL FACTORY INSTALLED CELL 8 ...

Page 15: ...Dimensions Power Supply and Cell AC PLUG ALWAYS PLUG INTO GFCI RECEPTACLE DC CELL CABLE L E D INDICATOR FEED RATE DIAL 0 100 END CAPS BODY COVER CELL BLADES POWER SUPPLY C E L L Section 2 b 9 ...

Page 16: ...ent problem or failure For further explanation of this indicator please refer to the Trouble Shooting Guide beginning on page 12 Output Control The Output Control Dial is a percentage timer that regulates the amount of on time the system requires to maintain the chlorine bromine residuals as indicated on page 4 of this manual The output is regulated according to the setting of this dial Remember t...

Page 17: ...ion 3 a EcoClean Power Supply Functions Cont d Equipment Start up Sequence Before operating the EcoClean System perform the following steps to ensure proper installation and opera tion A Turn ON all circuit breakers to the spa equipment Turn on jet pump Add required type s and amount of salt to spa Broadcast over the surface and allow salt to COMPLETELY dissolve 15 20 minutes Place the cell in the...

Page 18: ...Calculate Langelier s Index to assure balanced water See page 5 alkalinity and calcium hardness Adjust the water chemistry and mix 1 part muriatic acid to 4 parts water Allow the cell to soak in this solution for no longer than 15 minutes Repeat if necessary Rinse with fresh water and re install Dilute spa water with fresh water if necessary 2 Scale build up within the cell E Low salt E Check the ...

Page 19: ...urchase Warranty service cannot be performed without this documentation WHEN CALLING FOR SERVICE Please have the following information ready 1 Power Supply Model _________________________________________ 2 Chlorine Cell Serial Number ___________________________________ Located on top of cell stamped in plastic 3 Installation Date MM ___________DD _________YY ______________ 4 Warranty Registration ...

Page 20: ...formation This service and this information do not replace the official hard copy label The PMRA does not provide any guarantee or assurance that the information obtained through this service is accurate current or correct and is therefore not liable for any loss resulting directly or indirectly from reliance upon this service ...

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