MICROWELL HP 1000 GREEN User manual

Version: 01/2022
HEAT
PUMP
for swimming pool water
heating & cooling
HP 1000 GREEN
HP 1400 GREEN
HP 1700 GREEN
COMPACT & SPLIT
Installation and user manual

Installation and user manual HP1000/1400/1700 Green
Version: 01/2022 Page 2/32
HEAT PUMP MICROWELL HP
Thank you for purchasing Microwell swimming pool heat pump. Before you
use this device, it is necessary to carefully read the entire Installation and
user manual. It is not allowed to commence the heat pump installation or
operation unless full content of this Installation and user manual is
understood and acknowledged. Please keep the Installation and user
manual available in the case of any future reference is required. Please
provide this information also to each user of the device. Please mind local
regulations in your country regarding installation and usage of this heat
pump which are valid in addition to this User manual.
Content
1. INTRODUCTION ............................................................................................................................... 3
1.1 Product description ................................................................................................................. 3
1.2 Package checking..................................................................................................................... 4
1.3 Waste disposal information .................................................................................................... 4
2. SAFETY MEASURES .......................................................................................................................... 5
2.1 Electrical safety........................................................................................................................ 5
2.2 Usage precautions................................................................................................................... 5
2.4 Transportation......................................................................................................................... 8
3. TECHNICAL SPECIFICATION ............................................................................................................. 9
3.1 Technical data.......................................................................................................................... 9
3.2 Swimming pool water parameters........................................................................................ 10
3.3 Heat pump dimensions ......................................................................................................... 10
3.4 Exploded 3D view .................................................................................................................. 11
3.5 Installation instructions......................................................................................................... 12
3.6 Multiple heat pump connection............................................................................................ 13
3.7 Seaside installation................................................................................................................ 14
3.8 Electric wiring diagram.......................................................................................................... 15
SPLIT ADDITIONAL CONNECTION ...................................................................................................... 15
4. REGULATION.................................................................................................................................. 17
4.1 Description of wire controller ............................................................................................... 17
4.2 Operation Instruction............................................................................................................ 18
4.3 System parameter ................................................................................................................. 19
4.4 System status......................................................................................................................... 21
5. TROUBLE SHOOTING FOR COMMON FAULTS ............................................................................... 22
5.1 Repairing Guidance ............................................................................................................... 22
5.2 Failure solution and code ...................................................................................................... 22
6. SPLIT – CONNECTION AND INSTALLATION.................................................................................... 24
Refrigerant circuit connection........................................................................................................... 25

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Flaring work....................................................................................................................................... 26
Water unit dimensions ...................................................................................................................... 29
7. MAINTANANCE & WARRANTY ...................................................................................................... 30
7.1 Maintenance.......................................................................................................................... 30
7.2 Warranty................................................................................................................................ 30
1. INTRODUCTION
In your hands you hold probably the most advanced and the most efficient heat pump currently available on
the market. This heat pump provides warm water in your pool at lowest possible cost. The heat pump is
manufactured in tightest accordance with related strict standards and norms, in order to provide high quality
operation and long-term reliability.
This Installation and user manual contains all the necessary information about the installation, operation and
maintenance of the heat pump. Please read this Installation and user manual carefully before you start to use
this product. The manufacturer is not responsible for any personal or property damage due to the improper
installation, use or maintenance that is not in accordance with this User Manual.
This Installation and user manual is an inseparable part of this product; therefore it must be kept in good
condition and must accompany the heat pump.
1.1 Product description
The heat pump is designed exclusively for swimming pool water heating or cooling and maintaining its
temperature on the requested level. Other appropriate application is water temperature conditioning for fish
tanks, wine ciders or horse cooling facilities. These applications should be discussed with local installer or
distributor. Any other form of application is considered inappropriate.
The heat pump achieves the highest efficiency at 15÷35°C air temperature. At ambient air temperatures lower
than -5°C the efficiency of the device decreases and at the temperatures higher than +40°C the heat pump can
get overheated which may result in its malfunction, damage or failure. Do not use the product out of the
designated operational air temperature range which is stated in section 3.1 Technical data.
The heat pump enables heat gain from the external air surrounding the swimming pool through the
compression – expansion cycles of the heat-carrying liquid. The air is driven by a fan through the evaporator
where it will deliver its heat to the heat-carrying liquid (the air is being cooled at the same time). The heat-
carrying liquid is then delivered to the spirals of the exchanger by the compressor which pressurizes it and thus
heats it up. In these spirals, the heat-carrying liquid delivers its heat to the swimming pool water. From the
exchanger there is a cooled liquid flowing to the expansion valve or capillary where its pressure decreases and
it gets cooled down rapidly at the same time. This cooled liquid flows to the evaporator again where it gets
heated by the flowing air. The whole process runs fully automatically and is monitored by the pressure and
temperature sensors. The same principle is applied when heat pump operates in cooling mode.
Using simple language, a heat pump is able to extract the heat/cold that is present in ambient environment and
leveraged pass it into the pool water. When heating, higher the ambient air temperature is, more free energy
can the heat pump extract and thus reach higher efficiency. At favorable conditions you pay around 15% of
heat, i.e. 85% of heat is free. Please review below drawing of different ambient air conditions with subsequent
efficiencies.
The heat pump efficiency grows by the increasing surrounding air temperature.
It takes some days to achieve the requested swimming pool water temperature. This time period depends on
heat loss and heat gain balance of your pool.
Example factors of heat losses: poor pool construction, used materials, usage of cover, air – water
temperature relationship, fresh water refilling, filtration, etc.

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Example factors of heat gains: intensity of sun, winds, orientation of pool, air – water temperature
relationship, etc.
In order to avoid heat loss when the swimming pool is not being used, it is highly advised to use pool’s cover.
Ideal water temperature for external pools is considered at levels from 27° to 32°C. This may change based on
particular demands of the user. When setting the desired air temperature higher than 32°C please review the
material characteristics of your pool parts. High water temperature can damage these materials and contribute
to creation of algae. Manufacturer, distributor and reseller do not bear responsibility resulting from
inappropriate heat pump usage.
1.2 Package checking
The unit was delivered in carton box on a wooden palette. Do not accept the package if it shows
signs of damage. If the package appears intact, please unpack the unit and check the content. It
should include the following:
1. The heat pump – condensing unit, the heat exchanger.
2. This Installation and user manual
3. Four rubber silent blocks
1.3 Waste disposal information
When using this heat pump in the European countries, the following information must be
followed:
DISPOSAL: Do not dispose this product as unsorted municipal waste. It is prohibited to
dispose this heat pump in domestic / household waste. It is prohibited to dispose this
appliance into forests or natural landscape. This could lead into local soil pollution.
Collection of such waste must be treated individually.
DISPOSAL POSSIBILITIES:
1. The municipality has established a collection system where electronic waste can be disposed.
2. When buying a new product, the retailer or the manufacturer may take back the
old appliance free of charge.
3. Old appliance may contain valuable resources which could be sold to scrap
material dealers.

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4. Disposal of packaging materials such as carton box or plastic / bubble foil can be recycled.
2. SAFETY MEASURES
It is necessary to follow instructions in this Installation and user manual and local regulations in
your country that regulate the installation and usage of this device. Incorrect, improper or
operations contradictory to this Installation and user manual may lead to an injury or property
damage and will lead to loss of warranty. To prevent injury or property damage the following
instructions must be followed:
2.1 Electrical safety
•The device operates at dangerous electrical current.
•Only authorized person with particular electro-technical qualification can manipulate with unit.
•Danger of electrical shock.
•Do not exceed the required power supply.
•Do not turn the device on that shows signs of possible damage such as broken packaging, broken or
otherwise damaged unit’s chassis or cover, smoke, smell, etc.
•It is necessary to use appropriate Residual current circuit breaker (RCD) for connection of the heat
pump to main power supply.
•Do not manipulate with the device with wet hands.
•Do not clean the device with water.
•Before cleaning the device, switch off the circuit breaker of the unit’s power supply.
•Installation, service or repair must be performed by qualified technician.
•When the device is not intended to be used for a longer time, we recommend switching the circuit
breaker of the unit’s power supply off.
•Unit must be installed in vertical position to avoid condensate water to enter electrical part of the
unit.
•It is forbidden to install the unit close to devices that may cause electrical or frequency disturbance
such as welding machines, motors or rotors, WIFI/WLAN routers or repeaters.
•It is forbidden to alter electrical installation of the device. It is also forbidden to alter any other part
or functionality of the device.
2.2 Usage precautions
Do not cover or block the intake or exhaust opening / ventilator and evaporator covers. It
is forbidden to block or cover the intake or exhaust openings with clothes, towels,
buckets, canoes, trees, etc. Such action would lead to a decrease of needed airflow. That
would result in heat pump inefficiency and underperformance, eventually to heat pump
overeat with subsequent security turning off, and malfunction, failure or damage.
Especially during bloom months it is highly advised to keep the evaporator fins clean.
•Do not climb up on or sit on the unit.
•Do not place any objects on the top of the unit (e.g. boxes, flower vases, etc.).
•Do not spray any flammable substances into the equipment; this might lead to fire.
•Do not clean the equipment with aggressive cleaning agents;
this might lead to damage or
deformations.
•
When cleaning plastic parts do not use any cleaning agents unsuitable for plastic (household
cleaning agents, solvents, bleaching agents, benzene, diluen
ts, rough cleaning powder, cresol,
chemical agents). Instead, sweep the heat pump cover with a soft cloth or a sponge.
•Never throw or insert any objects into any hose or opening.
•The cover is made of metal. Do not manipulate with lighted cigarette, cigarette ashes, or any other
kind of fire in vicinity to this part.
•Use this device exclusively for the intended purpose, as described in the attached instruction

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manual. Do not use parts which are not recommended.
•Never block the air opening of the product. Protect the air openings from clogging by particles.
•Do not drink or use the condensate water drained from the unit. Do not return the water back to the
swimming pool. The water may be contaminated with bacteria.
•Children are not allowed to operate, touch or play with the unit.
•Children are not allowed to manipulate with packaging, plastic / bubble foil. Risk of suffocation!
•Prevent the children from injury or harm caused by any manipulation with the unit, its parts or its
packaging. Small parts like screws may be swallowed and cause harm to health.
•Do not leave the children in the swimming pool / at the swimming pool unattended.
•The positioning of the heat pump must be in accordance with the STN 33 2000-7-702 standard, i.e.
it must be placed at least 3,5 m from the swimming pool´s external border.
•For heating/cooling the swimming pool by the heat pump, the filtration pump must run and the
water must flow through the heat exchanger.
•Never turn on the heat pump if it is without water and if the filtration device is not operating.
•Protect the heat pump from freezing. Eliminate the water from the filtration and from the heat
pump’s water heat exchanger and prepare the product for the winter time.
•At low surrounding ambient temperature level (below 10°C) and high relative air humidity level (e.g.
after rain, during the night, etc.), the evaporator may get iced up. Heat pump will automatically
defreeze itself. Its operations or functionality is not harmed but the efficiency decreases.
•Manufacturer does not bear any responsibility concerning damages caused by inappropriate heat
pump selection, installation or application.
•Do not pressurize the water heat exchanger higher than 0.25MPa (2.5bar). By pressure of 0.5MPa
(5bar) the water heat exchanger gets irreversibly damaged. It is advised to install a security valve
with pressure threshold at 0.25MPa (2.5Bar) before the heat exchanger.
•
Do not apply or use water of higher temperature than 45°C in water heat exchanger. Water
temperature above 60°C irreversibly damages the water heat exchanger.
•Manufacturer does not bear any responsibility concerning damages caused by inappropriate heat
pump performance and/or model selection, installation or application. Heat pump is considered
undersized in the case it works usually and in long-term more than 18 hours daily. General warranty
void applies for damages on the device or other damages if the device works usually in long-term
more than 18 hours daily.
•The heat pump must be correctly sized for its application.
•
Refrigerant connection between the water and the condensing unit must comply with local
refrigerant regulations. Typically, the refrigerant circuit must be sealed. Manufacturer does not bear
any responsibility for damages caused by incorrect refrigerant works.
1
）
Warning
a. The WARNING sign denotes a hazard. It calls attention to a procedure,
practice, or the like, which, if not correctly performed or adhered to, could
result in personal injury or injury to a third party. These signs are rare, but
are extremely important.
a. Keep the heat pump away from fire source.

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b. It must be placed in well ventilated area, indoor or closed area is not allowed.
c. Repair and disposal must be carried out by trained service personnel
d.
Vacuumize completely before welding. Welding can only be carried out by
professional personnel in service center.
2
）
Attention
a. Please read the following instructions before installation, use and maintenance.
b. Installation must be done by professional staff only in accordance with this manual.
c. A leakage test must be performed after installation.
d. If a repair is required, please contact the nearest after-sales service center. The repair process must be
strictly in accordance with manual. All repair practice by non-professional is prohibited.
e.
Set proper temperature in order to get comfortable water temperature to avoid overheating or
overcooling.
f.
Please don’t stack substances, which will block air flow near inlet or outlet area, otherwise the
efficiency of the heater will be reduced or even stopped.
g. Don’t use or stock combustible gas or liquid such as thinners, paint and fuel to avoid fire.
h. In order to optimize the heating effect, please install heat preservation insulation on pipes between
swimming pool and the heater, and please use a recommended cover on the swimming pool.
i. Connecting pipes of the swimming pool and the heater should be ≤10m.
3.
）
Safety
a. Please keep the main power supply switch far away from the children.
b. When a power cut happens during operating, and later the power is restored, the heater will start up.
c. Please switch off the main power supply in lightening and storm weather to prevent from machine
damage that caused by lightning;
d. Any repairing should be conducted in the area with good ventilation. The ignition source is prohibited
during the inspection.
e. Safety inspection must be carried before the maintenance or repair for heat pumps with R32 gas in
order to minimize the risk.
f. If R32 gas leaks during the installation process, all operations must be stopped immediately and call the
service center.

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2.3 Handling precautions
•Transport in lying position or turning the device over may harm the compressor resulting in unit’s
malfunction, failure or damage and will lead to loss of warranty.
•The device must be handled with care and special attention avoiding any mechanical damage.
•It is forbidden to apply any improper mechanical force onto the unit. This may cause mechanical
damage to the device.
•It is forbidden to let the device fall freely onto the ground or any solid surface resulting in hard
impact.
•Please notify your reseller or distributor if you suspect that the unit was delivered damaged. Unit
may seem to work well at start but small damage can make the unit go out-of-order in short time.
In such case the unit must be inspected and approved for further use by your reseller.
•Please notify your reseller or distributor if directly after installation you suspect that unit is not
working in perfect order.
•In the case of device failure resulting from improper handling or mechanical damage (impact, hit,
fall, etc.), the manufacturer reserves the right to evaluate the continuity of warranty.
2.4 Transportation
a. Always keep upright
b. Do not lift the unit by water union
( If so, the titanium heat exchanger
inside the heat pump may be damaged)

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3. TECHNICAL SPECIFICATION
3.1 Technical data
Model
HP1000 GREEN
HP1400 GREEN
HP1700 GREEN
AMBIENT TEMPERATURE: (DB/WB) 27°C/24.3°C; WATER INLET/OUTLET TEMPERATURE: 26°C/28°C.
Heating capacity (kW)
9.2
12.3
16.2
Power input (kW)
1.52
2.05
2.7
COP
6.05
6.0
6.01
AMBIENT TEMPERATURE: (DB/WB) 15°C/12°C; WATER INLET TEMPERATURE: 26°C.
Heating capacity (kW)
6.4
8.57
11.3
Power input (kW)
1.4
1.8
2.4
COP
4.7
4.7
4.72
Power supply
220-240V / 50Hz
Max power input (kW)
2.2
2.65
3.6
Max current(A)
10.3
12.4
16.4
Heating water temperature range
15°C~40°C
Running ambient temperature range
-5°C
～
40°C without winter accessories
-15°C～40°C with winter accessories
Refrigerant
R32
Air side heat exchanger
Hydrophobic Goldfin exchanger
Water side heat exchanger
Titanium tube heat exchanger
Water flow(m³/h)
4
5.3
7.1
Net dimension LxWxH (mm)
910x360x620
1000x385x665
Water pipe connection (mm)
50
Net weight (kg)
39
49
56
Noise level dB(A)
46
52
54
* The manufacturer reserves the right to change the parameters without notice.
The refrigerant circuit is filled with R32.
Refrigerant R32 also called HFC-32 or difluoromethane. R32 is a molecule used as refrigerant that has zero
ozone depletion potential (ODP).
R32 with the global warming potential (GWP) index 675 times that of carbon dioxide, based on a 100-year time
frame, and it is classified as A2L - slightly flammable by ASHRAE.
1. Noise at 1 m, at 4 m and at 10 m in accordance with Directives EN ISO 3741 and EN ISO 354
2. Calculated according to an in-ground private swimming pool covered with bubble plastic cover

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3.2 Swimming pool water parameters
The heat pump is designed for heating the swimming pool water. Although the water heat exchanger is made
from the most durable titanium, in order to ensure long term reliability of the heat pump the pool water must
be in accordance with the related sanitary requirements.
The limit values for the heat pump operation are the following:
-pH value ranging from 6.8 to 7.9,
-total chlorine amount not exceeding 3 mg/l,
-salt content 6% wt/wt.
Should you have different values of pH, chlorine or salt please try to apply appropriate agents or contact your
swimming pool builder to resolve the situation. Above mentioned values are recommended for pools in
general.
It is also advised to keep the water hardness on the lower limit of the optimal range, i.e. closely above 8 °N.
3.3 Heat pump dimensions
Model
A
B
C
D
E
F
G
HP1000 GREEN
910
360
620
591
330
310
98
HP1400 GREEN
1000 385 665 681 373 380 98
HP1700 GREEN
Note:
The illustrations and descriptions found
in this Installation and user manual are not
binding. The manufacturer reserves the right
to make corrections or changes without
notice.