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Integrative Pressurized Solar Water System

MANUAL

Please read the user manual carefully before installation!

Heat your water with the sun, for a green future!

Foreword

Dear users：

Thank you for choosing “ Solar Water Heater”, insisting on “superior quality, superior

service, and keeping promise”, providing high quality solar water heater and perfect after

service。In order to use “Solar Water Heater” more efficiently, please read the manual

carefully first and use the solar water heater according to it. This manual has been written

just for you to have the general idea about the “Solar Water Heater”, such as major

technical parameter and routine maintenance, and ensure you feel easy and comfortable

while using your “Solar Water Heater”. The scheme structure of the “Solar Water Heater” is

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correct when published, since the technical and performance features were in improving,

the structure may not be in accordance with the manual. Soltek reserves the right to

modify the manual.

Working principle

Integrative pressurized solar water heater is an all-glass evacuated tubular solar domestic water

systems combined with heat pipes inside the evacuated tube. The solar collector provides heat through

a high efficiency heat pipe-copper. It's different from thermosiphon solar water heater.

The high temperature operation of heat pipe evacuated collector tube and their very low radiant heat

losses make them ideal for solar water heater. The selective coating on the inner tube converts solar

energy into heat energy and transfers to the heat pipe by an aluminum fin. The liquid in the heat pipe

changes into vapour which rises to the condenser. The heat was conducted to the water inside the tank

and the vapour becomes liquid, returning to the base of the heat pipe. This continuous circulation

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transfers heat from the heat pipe to the cold water in the tank as long as the collector is heated by the

sun. Hot water can be obtained by injecting cold water from the bottom of the tank.

Run principle

Major performance features

1. All-year-round in service. Whatever the weather is like cloudy or rainy, daytime or night time, the

light-electric style can still provide the hot water for showers;

2. High absorption efficiency, the core parts of the solar water heater—heat pipe evacuated collector

tube, adopting the advanced selective absorbing layer and preeminent heat conducting material -

red copper, the tube has a unique effect of absorption;

3 Perfectly insulation performance is achieved by polyurethane foam, lower heat-loss. It could keep

temperature constant for a long time;

4. The inner tank is made of stainless steel SUS304-2B (food grade)—which is the best solution to the

function of pressure bear, anti-corrosion, and anti-leakage which has no harm to the health;

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5. Can operate with water pressure up to 0.6MPa, can be directly connected with city tap water，

optimum pressure, more comfortable;

6. The whole system has humanistic design, optional function depending on actual needs. It can reach

to completely automatic operation. The system can still operate in the case of tube broken.

Installation Instruction

1. The frame assembly diagram

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2. Installation of water tank and heat-pipe evacuat ed tube

1) Put the water tank symmetrically onto the support, the four screws at the bottom of the water tank

shall be placed accordingly into the holes on the support, there is no need to fasten them with M8

nut temporarily.

2) Installing the nylon cap on the bottom track, put the anti-dust silica gel ring on the tube (mild

washing liquid & water will be useful)

3) Insert the tube inside the nylon tail stock, hold the tube tightly, then rotate inside pipe clockwise into

hole slowly, then tight the tailstock.

◙ Attention:

a. Don’t touch the tube on the ground, or it will b e broken;

b. Before installation, make sure that heat pipe ev acuated tube is not exposed in sunlight for

a long time, in case the condenser end gets scorche d and expands, becoming impossible

to be inserted in the hole.

4) After the insertion of all the evacuated tubes, adjust the angle of the water tank before finally

fastening the foot screw located at the bottom of the tank;

Scheme of piping installation

Please pay attention to the following points during installation

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1. In case a dual heating mode of sunlight/electrical power be sure to have a power leakage protection

when installing the electrical element and refrain from using your electrical element in a thunder

storm.

2. If your solar heater is installed at a level higher than the buildings around the user will have to have

lightening arrester, which shall be higher than the heater for min 50 cm; In case the lightening

arrester has the heater for supporting it shall be separated from the heater with insulator and the

clearance between the two shall not be less than 30 mm.

3. At the completion of installation the support frame of the solar heater shall have wind protection

where the support is in contact of the ground so that strong wind cannot topple the heater and

damage it

4. Arrangement of pipelines shall be as per relevant norm of plumbing. Plumbing outdoors shall have

support and it is not allowed to have the piping directly hanging from the water tank. Plumbing shall

start higher up and going downward, free of horizontal sector and reverse bends in order to prevent

water accumulating in the pipeline when draining.

5. All pipelines need insulation; for areas with freezing temperature at winter times plumbing outdoors

shall have insulation layer not less than 50 mm in thickness.

6. Using the intelligent controller in a correct way. Please read the controller user’s manual carefully

before using it.

Guideline for Users

1. When you didn’t want to use the solar water heater, the hot water outlet, valve and up-flow valve

must all in closed position. When fill the water, open the up-flow valve.

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2. To prevent scalding caused by overheated water, it is advised to feel the water temperature with a

hand before showering. When adjusting the temperature, the hot water valve shall be adjusted to a

suitable showering temperature according to the season, sun radiation and water pressure.

3. In cold winter, when the room temperature is low, bathroom master can be used to increase the

room temperature. In extremely cold districts, when didn’t want to use the solar water heater, the

water in the pipeline shall be completely drained out during winter to prevent the freezing crack

damage to the pipeline.

4. Prior to using the electric heating device, make sure the electricity leakage protector and the fuse

are in good order. Fill the tank up with water before switch on the power. Heating without presence

of water is strongly prohibited and after the heating, be sure to switch off the power.

5. Please don’t shower when there is a thunderstorm and fill up the tank when there is a hurricane.

6. In summer, if the hot water requirement is little or the temperature is too high, you can use mask to

cover some surface of the solar collector to reduce the heat absorption.

Solar Water Heater Common Sense

A simple approach to identify the evacuated collect or tube in good quality

1. Homogenous color;

2. The ventilation opening at the end of the evacuated collector tube shall be perfect;

3. The air-absorbing chemical at the bottom of the evacuated collector tube shall be like a mirror. The

darker evacuated collector tube surface looks, the vacuum degree it’s lower; if the bottom is whitish,

the vacuum degree is zero;

4. After the radiation in sunshine for several hours, touch the tube with a hand, the tube with normally

vacuum degree feel “cold” and the ones with poor vacuum degree feel hot;

What’s the feature of the solar water heater?

Compared with the conventional energy sources such as electricity and gas, solar water heaters

prominent advantages lie in their safety, energy saving, cleanness and environmental friendliness

etc. .As a result, they’ve rapidly taken the place of electric and gas heaters’ market.

How much does a solar water heater cost?

The cost of the system strongly depended on the climate. In warm climates with high yearly irradiance

simple systems can be used (e.g. the south of Europe). The total cost (installation) is lower than colder

It is strongly prohibited to bathe with power switch on!!!

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climates with a chance of freezing (e.g. North Europe).

How to select a solar water heater?

A good product shall have a complete instruction book, symbol and package. The appearance of the

product shall be decent with reasonable structure and refined workmanship，In addition, there shall be

perfect after-sales service.

What size do I need?

Usually each person consumes 35L to 50 L of hot water (approximately 45℃) for one shower. Since the

solar energy isn’t a conventional energy, hot water cannot be produced by solar energy in cloudy or rainy

days, so it is advisable to select a solar water heater with double daily consumption to store the hot water

produced on sunny days for rainy days use. If there are 2 days continuously rainy, it is recommend that

light-electric types are used to ensure the hot water supply under all weathers throughout the year.

How can I select the piping?

Since the solar water heater is usually installed on the roof and there can be generate some pressure to

the interior of the room. In addition, the hot water temperature is high (maybe up to more than 90℃), yet

the outdoor temperature is low (may fall below -10℃). Therefore, the cross-linking pipes or enhanced

soft pipe are recommended. These pipes are featured in pressure resistance, high temperature

resistance, coldness resistance, toxic-freeness, odor-freeness, small thermal capacity, little heat loss

and not easily frozen in winter.

What should I do during holidays?

If you are going to be away for a period of a week or more during the summer months it is advisable to

turn off the electricity supply to the booster and if practical cover the solar collectors. If the hot water

system is not used for two weeks or more, a quantity of hydrogen gas, which is highly flammable, may

accumulate in the water heater. To dissipate this gas safely, it is recommended that a hot tap be turned

on for several minutes at a sink, basin or bath but not a dishwasher, clothes washer, or other appliance.

During this procedure there must be no smoking, open flame or any other electrical appliance operating

nearby. If hydrogen is discharged through

the tap, it will probably make an unusual noise as with air escaping. Do not place hands or any part of

your body beneath the tap during this procedure.

Are you using more hot water than you think?

Often the hot water usage of showers, washing machines and dishwashers is under estimated. Review

these appliances to determine if your daily usage is greater than the storage volume of your water heater.

If the system contains 150L of hot water and your usage is greater than 150L there may be periods

where the water temperature is slightly lower than normal. It is also advisable to inspect tap washers etc.

for leakage and replace if necessary.

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How to check installed solar water heater before ac cepting it?

The installed solar water heater shall face the south with nothing shading in front of it. The water tank,

pipe, valve and joint shall have no leakage. The insulated pipes shall present no disconnection or

leakage. The connecting position between the vacuum tubes and the water tank shall be appropriate.

The vacuum tubes shall present no damage, leakage or whiteness.

How to raise the water temperature?

1. Ensure both the up-flow pipe and the down-flow pipe are insulated.

2. Select pipes with low thermal conductivity.

3. Immediately fill the water after showering at night, be sure to leave a full tank at night to avoid too

hot water’s accelerated heat loss into the air at cold nights.

4. If the water temperature is low when showering, bathroom master can be used to raise the room

temperature. If bathing, add more boiled water to the tub to increase the temperature.

5. Use electric heating device and switch on the power after filling the tank up. Switch off the

power to take a shower

Cleaning the evacuated tube. In the dusty district, the dust can adhere to the tubes, which can affect

the absorption. Therefore, according to the amount of dust, the evacuated tube shall be cleaned

once every half a year to every year. When cleaning, use soap water or detergent to rub the tubes.