Elecro engineering Nano spa heater Installation instructions

Nano SPA Heater

Installation & Operating Manual


 
CONTENTS 
 
PRODUCT OVERVIEW ........................................................................................................3 
GENERAL INSTALLATION INSTRUCTION ........................................................................4 
1 Mounting instruction ...........................................................................................................4 
2 Pipework.............................................................................................................................4 
3 Flow direction .....................................................................................................................6 
4 Electrical connection...........................................................................................................6 
5 Power requirements ...........................................................................................................7 
OPERATING INSTRUCTIONS .............................................................................................7 
1 Flow requirements..............................................................................................................7 
2 Water quality.......................................................................................................................7 
TROUBLESHOOTING..........................................................................................................8 
MAINTENANCE..................................................................................................................10 
DISPOSAL OF ELECTRICAL AND ELECTRONIC EQUIPMENT .....................................10
WARRANTY .......................................................................................................................11 
WIRING DIAGRAMS: .........................................................................................................12

3

INTRODUCTION

Thank you for purchasing the Nano Spa Heater manufactured to the highest standards in England.

To ensure years of trouble-free service, please read and follow these instructions for proper installation,

maintenance and use. Incorrect installation will affect the warranty.

WARNING: Failure to install the unit correctly may result in the warranty being void.

Please retain this manual for future reference.

1. PRODUCT OVERVIEW

Fig. 1

Dimensions:

4

2. GENERAL INSTALLATION INSTRUCTION

2.1 Mounting instruction

The heater should be either installed horizontally or vertically allowing enough space for the pipe

connections and wiring. It should be firmly secured using screws to a firm base or wall.

WARNINGS: If the heater is placed against a combustible material a fireproof barrier must be

placed between the unit and the wall, this must cover a minimum of 15cm

around the outside of the heater. The unit mustnot be covered to allowadequate

ventilation.

The heater must be installed within a dry, permanent weather-proof area. In any

case where water or moisture enters the enclosure the warranty will be void.

Caution: If the heater is unused during the winter months, it must be drained to prevent

frost damage. Water must not be allowed to freeze in the heater, as this will

cause severe damage.

2.2 Pipework

The heater should be installed at a low point in the filtration system. It should be positioned downstream

of (after) the filter and upstream of (before) any dosing or other water treatment plan. (see Fig. 2).

Fig. 2

5

Fig. 3

It is essential that the pipe work connecting to and from the heater has a minimum bore (internal diameter)

of 32mm. To support correct air purging and to ensure the heater remains completely full of water during

operation, the return pipe which carries the water back to the pool must incorporate a safety loop or

‘kick-up’ in the pipe as close as possible to the heater (see Fig. 3).

NOTE: When coupling to a flexible pipe, a safety loop can easily be formed by directing the

pipe up and over an obstacle. Pipe clips should be used to securely fasten all hose

connections.

Fig. 4 Fig. 5

6

If rigid pipework is used

There is no need to use mastic or PTFE tape to connect unions or hosetails to the heater, use the O-ring

supplied which should be slid over the threaded ends (see Fig. 4).

All factory unions are made from ABS plastic, when gluing connections to an ABS pipe, an ABS cement

must be used (see Fig. 5).

NOTE: Be sure to apply the glue evenly and to all surfaces that will be in contact to reduce the

risk of leakage.

If flexible pipework is used

Connect the pipe to the non-threaded side of the hosetail and secure using two jubilee clips

(See Fig. 5).

NOTE:

•The hosetail may need to be cut depending on the diameter of the pipe.

•Wrap PTFE tape or use silicone around the hosetail before connecting the

pipe to reduce the risk of leakage.

•When using non-standard pipework, the first thing to note is that the smooth

end of the pipe will not fit into anything other than another fitting of the same

brand. You will have to cut it off. The hose tail will push fit in to the cut end

of the pipe, but it will not be watertight. You can put two jubilee clips on it

but because of the ridges in the pipe it will not squeeze down tight. It will

need to be sealed with a bathroom type mastic sealant.

2.3 Flow direction

The heater can accept the flow of water from only one end. The flow switch should always be where the

water exits.

2.4 Electrical connection

WARNINGS:

•This device must be installed by a qualified Electrician following the

instructions provided in this manual. The manufacturer will not be liable for

any issues caused by poor or improper installation.

•Any alterations made to the unit (unless stated) will affect the warranty. This

also applies if components are changed for non-standard components

acquired anywhere other than direct from the manufacturer.

•Incorrect installation may result in serious damage to property/persons.

•The heater must be installed in accordance with the country/regional

requirements and regulations and an Electrical Installation Certificate must

be provided on completion of the installation.

•The power supply must be fitted with a 30mA RCD.

Connections

•The Nano splasher comes pre-wired with a plug to allow simple installation.

•Make sure not to expose the cable to anything which can cause damage to it i.e. sharp edges, hot

surfaces, or crush hazards.

•The cable should be fixed to avoid any trip hazard.

7

2.5 Power requirements

220–240V 1-Phase Power Output

Load

1-kW

5-Amp

2-kW

9-Amp

3-kW

13-Amp

4-kW

18-Amp

4.5-kW

20-Amp

5-kW

22-Amp

6-kW

27-Amp

400V 3-Phase Phase Power Output

Load

8-kW

20-Amp

3. OPERATING INSTRUCTIONS

3.1 Flow requirements

The flow rate of water into the heater must not exceed 17,000 litres per hour (17m3/hour/3,740 UK gallons

per hour). A higher flow rate will require the installation of a by-pass to prevent damage to the heater

elements.

NOTE: The heater will not operate unless the following minimum flow rates are achieved:

1,000 litres/hour (1m3/hour / 220 UK gallons/hour).

3.2 Water quality

The water quality MUST be within the following limits:

•PH: 6.8 –8.0

•Total Alkalinity (TA): 80 –140 ppm (parts per million)

•Chloride Content MAX: 150 mg/litre

•Free Chlorine: 2.0 mg/litre

•Total Bromine: Max 4.5 mg/litre

•Total Dissolved Solids (TDS)/Calcium hardness: 200 –1,000 ppm

The permitted salt concentration is dependent on the model of heater purchased:

•Incoloy 825 heating element = Zero salt content permitted

•Titanium heating element = MAX salt content of 8,000ppm (8g/litre)

•For salt concentrations greater than 8,000ppm a Titanium flow tube and Titanium heating element

model must be installed.

Upon completion of the installation, run the water-circulating pump to purge the system and heater of air

(i.e. remove any trapped air in the system and heater).

•Switch on the power supply to the heater. This will be indicated by the illuminated Amber light on

the panel.

•Turn the thermostat to the desired temperature.

•The heater will only start heating (red light indicator illuminated) when the following criteria are met:

➢Water circulating pump is ‘On’ delivering more than the minimum flow rate of water (see 3.1

flow requirements).

➢The required water temperature point is set to a higher value than that of the water.

8

Useful advice:

To reduce running costs and speed up the heating process, insulate the pool wherever possible. A floating

solar cover is an essential minimum to retain heat.

4. TROUBLESHOOTING

➢Quick Function Test

Observe the main electricity meter when the heater is on (i.e. red light ‘On’) and then observe it again

when the heater is in the standby mode. The test should show that the meter is recording more electricity

being used by the heater when the red light is ‘On’. It is impossible for an electric heater to waste energy,

if it is drawing power then that power will be turned into heat that will be transferred to the water.

➢Accurate Function Test

If a more accurate test is required to confirm that your heater is delivering the specified heat output, two

electricity meter readings will need to be taken from the property’s main electricity meter, at one hourly

intervals (i.e. take one-meter reading and then a second reading exactly one hour later). By subtracting

the first reading from the second reading the number of units (kilo Watts kW) consumed can be calculated.

Note that your heater is also rated in kW hours.

The pool pump and heater will need to be running continuously during the test (i.e. with the heater red light

‘On’. To avoid inaccurate results when performing this test, it is important to refrain from using other high

current consuming appliances in the property, such as tumble dryers, showers, cookers etc. A large

domestic pool pump of one horsepower will draw less than 1-kW in a one-hour period. The conclusion of

the test should prove that for example a 6-kW heater and a half horsepower pump will draw between

6.3-kW to 6.5-kW in one hour.

➢Heater will not switch from standby to ON (Red light):

In most cases this will be the result of one of the following points not being met:

Possible Cause 1: The temperature set point has been achieved. To confirm the

increase of the temperature set, turn the dial to a value greater than

the current water temperature.

Possible Cause 2: Insufficient flow.

Make sure circulation pump is powerful enough to deliver min flow

required to operate the heater (see 3.1 flow requirements).

If using a cartridge filter: Confirm this by running the system with the cartridge removed from

your pump andfilterunit, this willsupply the heaterwith themaximum

flow rate your unit is capable of. If the heater then switches ‘On’ (i.e.

red light ‘On’) a blocked cartridge can be confirmed to be the cause.

The cartridge should be cleaned or replaced.

If using a sand filter: Check the pressure indicator on your sand filter and back wash if

necessary.

9

Possible Cause 3: The ‘Thermal safety cut-out’ has tripped.

Remove button cover and press red button as far as possible to

re-set (see Fig. 6). If a positive click is felt, the cause of the tripping

must be investigated and could be caused by a debris build-up or air

pocket trapped inside the flow tube of the heater.

Fig. 6

➢Heater is tripping circuit breaker (MCB) after few minutes/ hours of operation:

If the heater is faulty it will instantly trip circuit breaker (MCB). The most likely causes of tripping the

breaker after a period of time are:

Possible Cause 1: Faulty circuit breaker.

Possible Cause 2: Incorrect size of the circuit breaker.

Possible Cause 3: Cross section of the cable is not sufficient.

Possible Cause 4: Loose connection(s) of the power supply cable. Check both ends of

the power supply cable (at the distribution box and at the heater

terminal block).

Remedy: Contact an Electrician to check installation and protection.

➢Heater is tripping circuit breaker (MCB) or RCD instantly:

Possible Cause 1: Short circuit caused by the wiring or faulty components.

Possible Cause 2: Heating element is going to ground or is damaged.

Possible Cause 3: Moisture inside the heater.

Remedy: Send the heater back to the manufacturer. Use the return form on

page 13 or download it from the Elecro website.

➢Power supply cable is getting very hot:

Possible Cause 1: Cross section of the power supply cable is not sufficient.

Possible Cause 2: Loose connection(s) of the power supply cable. Check both ends of

the power supply cable (at the distribution box and at the heater

terminal block).

Remedy: Contact an Electrician to check installation. Inspect for loose

connections and upgrade the power supply cable to a bigger size if

necessary.

10

➢The flow tube does not feel warm:

Due to the high efficiency of your electric heater no warmth should be detectable from the flow tube

of the heater.

The most likely causes of the flow tube feeling warm are:

Possible Cause 1: The heater has been positioned in direct sunlight.

Possible Cause 2: An air pocket is trapped inside the heater particularly if the tank feels

warmer at the highest point of the tank (as air rises).

➢The water entering the pool does not feel much warmer:

The temperature gain of the water after it has passed through the heater will be directly proportional

to the volume of water being pumped in relation to the power output of the heater.

For example: A 6-kW heater, when connected to a 4,000 litre/hour pump will

produce a lift in temperature of approximately 1.2°C (almost

undetectable to the human hand), however, as the water being

heated is re-circulated from a single body of water, the time required

to heat it remains unaffected by the volume of flow. A popular

misconception is that slowing down the flow rate will speed up the

heating process.

5.MAINTENANCE

We recommend annual maintenance and cleaning of the heater to ensure proper operation.

WARNING: Before performing any maintenance on the unit isolate from the main power supply.

The heater should be drained, the flow tube and heating elements should be cleaned. Removing

scale/sludge and any debris or blockages will extend the life expectancy of the heating element(s) and

avoid potential failures.

Check that electrical cable connections are properly tightened.

6.DISPOSAL OF ELECTRICAL AND ELECTRONIC EQUIPMENT

DO NOT dispose of this product as an unsorted municipal waste.

This symbol on the product or on the packaging indicates that this product should not be treated as

household waste. Instead it should be handed over to the applicable collection point for the recycling of

electrical and electronic equipment.

By ensuring this product is disposed of correctly you will help prevent potential

negative consequences for the environment and human health, which could

otherwise be caused by inappropriate waste handling of this product. The

recycling of materials will help to conserve natural resources.

For more information please contact your local Civic Office, household waste

disposal service or the retailer where the product was purchased.

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7.WARRANTY

This product is guaranteed from the date of purchase against faulty workmanship and materials

for:

–two years within Europe

–one year outside Europe

•The manufacturer will replace or repair, at its discretion, any faulty units or components returned

to the Company for inspection.

•Proof of purchase may be required.

•The manufacturer will not be liable in cases of incorrect installation of the heater, inappropriate use

or neglect of the heater.

•Any damages occurred due to shipping must be reported within 48 hours of receipt of the product.

Any claims after this time will be considered as misuse or abuse of the product and will not be

covered by the warranty.

•Any glass parts, seals and water connections are considered as consumables and are not covered

by the warranty.

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8. WIRING DIAGRAMS:

Nano SPA 1, 2 and 3-kW

Nano SPA 4, 5 and 6-kW

Nano SPA 8-kW

13

Elecro Engineering Ltd

RepairsDepartment

Unit 11 Gunnels Wood Park

Gunnels Wood Road

Stevenage

Hertfordshire

SG1 2BH

United Kingdom

__________________________________________________________________________________

Customer Information: (ATTACH TO HEATER)

Company Name:

……………………………………………………………………………….

Contact Name:

……………………………………………………………………………….

Daytime Telephone Number:

……………………………………………………………………………….

Email Address:

………………………………………………………………………………..

Return Address:

………………………………………………………………………………..

Post/Zip Code:

………………………………………………………………………………..

Country:

……………………………………………………………………………….

Suspect Fault / Description of problem:

14

15

Notes:

……………………………………………………………………………………………….

11 Gunnels Wood Park, Stevenage, Herts SG1 2BH

[email protected] www.elecro.co.uk +44 (0) 1438 749474

Elecro Engineering Nano SPA Heater Installation instructions

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