MICROWELL HP 900 Compact, HP 1200 Compact User Manual

Version: April 2014

HEAT

PUMP

for swimming pool

water heating

HP 900 COMPACT

&

HP 1200 COMPACT

Installation and user manual

2 | Installation and user manual

HEAT PUMP MICROWELL HP COMPACT

CONTENTS

1. Introduction 3

1.1 How to use the heat pump 3

1.2 Heat pump operation 3

1.3 Package checking 3

2. Safety measures 4

3. Product description and technical specification 5

3.1 Technical data 5

3.2 Swimming pool water parameters 5

3.3 Heat pump dimensions

5

3.4 Description of the basic parts 6

3.5 Safety and control systems

6

3.6 Block wiring diagram of the PCB board

7

4. Heat pump installation and connection 8

4.1 Positioning 8

4.2 Heat pump installation 9

4.3 Electric connection 11

4.3.1 Connection to the plug adapter 11

4.3.2 Fixed electric connection 11

5. Control unit 12

5.1 Functions of the control unit with LCD panel 12

5.2 Setting of the operating parameters 12

5.3 Turning on/off the operating / STAND-BY mode and setting
of the requested water temperature 13

5.4 Checking of the current values of some parameters 14

5.5 Timer setting 14

5.6 Control panel lock 14

6. Use and operation of the device 15

6.1 Operating instructions 15

6.2 Setting of the operating status by the by-pass 15

6.3 Water condensation 16

6.4 Possible problems caused by external factors

16

6.5 Comments on the heat pump operation 16

6.6 Simplified control diagram 17

7. Maintenance and checking of the device 18

7.1 Maintenance 18

7.2 Getting prepared for winter time 18

7.3 Warranty conditions, service and spare parts 19

7.4 Failure reports and their elimination 19

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HEAT PUMP MICROWELL HP COMPACT

1. INTRODUCTION

Thank you for purchasing our heat pump.

The heat pump is manufactured in accordance with the related strict standards and norms, in order to
provide high quality operation and reliability to our customers. This manual contains all the necessary
information about the installation, operation and maintainance of the heat pump. Please read this
manual carefully before starting to use the product. The manufacturer is not liable for any personal or
property damage due to the improper installation, use or maintainance of the heat pump.

The manual is an inseparable part of the product, therefore it must be kept in good conditions and
must accompany the heat pump.

1.1 How to use the heat pump

The heat pump is designed exclusively for heating the swimming pool water and keeping its
temperature on the requested level economically. Any other form of application is considered
inappropriate.

The heat pump achieves the highest efficiency at 15÷25°C air temperature. At the temperature lower
than +5°C the efficiency of the device is low and at the temperature higher than +40°C, it can get
overheated. Do not use the product out of the requested 5 ÷ 40°C temperature range.

The product is designed for swimming pools with up to 40 m

3

- HP 900 and up to 60 m

3

- HP 1200.

For proper operations, there must be a water flow through the heat pump exchanger in range

of 4-6 m

3

/hour.

1.2 Heat pump operation

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 presses and 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,
where its pressure decreases and it gets cooled down rapidly at the same time. This cooled down
liquid flows to the evaporator again, where it gets heated by the flowing air. The whole process runs
smoothly and is monitored by the pressure and temperature sensors.

By choosing the heat pump mode, it is possible to reverse the direction of the circulation in order to
cool the swimming pool water.

1.3 Package checking

The device is delivered as a complete arrangement, prepared for connection to the piping distribution
of the swimming pool filtration and for connection of the 230 V single-phase electric distribution to the
terminal of the heat pump.

When installing, it is important to set the ending of the condensate off-take into the appropriate
outlet on the bottom of the casing. Please check whether the arrangement is complete, before any
further manipulation with the device.

Note: The illustrations and descriptions found in this manual are not binding. The manufacturer
reserves the right to make corrections or changes without any liability to update this manual.

EU symbol for waste sorting

Safe the environment. Keep the local regulations on waste disposal. Deliver any unused
or faulty electric device for disposal to the professional institution in charge.

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HEAT PUMP MICROWELL HP COMPACT

2. SAFETY MEASURES

WARNING:

The product contains electric parts under pressure. Every operation

must be performed by a specialised technician. Risk of injury by electric current.

a) 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.

b) The connecting circuit of the heat pump must be in accordance with the related standard

(STN 33 2000), must be equipped with a current protector with a 30mA interrupting current.

c) Any kind of interference with the electric installation of the heat pump and with the feed

circuit must be performed only by a specialised technician.

d) Do not install the heat pump at places that can get flooded by water.

e) Make sure that children are kept away from the working area of the heat pump. The main

heat pump switch must be placed beyond the reach of children.

f) Do not leave the heat pump in operation without a complete arrangement, including the

covers. Rotating fans may cause serious injuries. The internal pipe is warm during operation
and may cause burns when touched.

g) If you notice any damage on the flexible cord of the heat pump or on the extension cord on

the inlet, turn off the circuit-breaker of the heat pump´s feed circuit immediately and
eliminate the failure.

h) Any kind of repair of the heat pump or interference with the pressure cooling circuit, must be

performed only by a specialised technician.

i) The product maintenance and operation must be performed in accordance with this user

manual, in the recommended terms and frequency.

j) Make sure that you use only original spare parts.

In case of not following and keeping the above instructions, the warranty is not applicable.

The cooling circuit is filled with R410A refrigerant that consists of 2 components (R32/R125). These
components are considered as fluorocarbon greenhouse gases.

The product contains fluorocarbon greenhouse gases listed in the Kyoto Protocol:

R410A with the global warning potential (GWP) 1720
(R-32/125 50/50)
CH2F2 + CF3CHF2
1270 g (HP 900)

1600 g (HP 1200)

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HEAT PUMP MICROWELL HP COMPACT

3. PRODUCT DESCRIPTION AND TECHNICAL SPECIFICATION

3.1 Technical data

HP 900 COMPACT HP 1200 COMPACT

Air temperature/water temperature

25°C/10°C

25°C/20°C

25°C/10°C

25°C/20°C

Heating output (kW) 9.03 8.57 12.01 11.07

Power consumption (kW) 1.55 1.57 2.06 2.03

Coefficient of Performance (C.O.P.) 5.80 5.44 5.81 5.45

Recommended swimming pool capacity (m3) (with
a cover/without a cover)

40/30 60/40

Energy class A A

Operating temperature – air (°C) 5-40 5-40

Optional swimming pool water temperature range (°C) 5-40 (60) 5-40 (60)

Air flow (m3/h)

2520

2520

Recommended water flow (m3/h)/pressure loss (kPa) 4-6/2-8 4-6/2-8

Feeding voltage/Protection (V/A) 230 / 20/1C 230 / 20/1C

Current-carrying capacity/max. current (A) 9.1 10.6

Coverage/Protection IP X4/by zeroing IP X4/by zeroing

Heat exchanger Titan Titan

Acoustic pressure level dB (A) 1m/2m/4m/8m 54/48/42/36 55/49/43/37

Water circuit connection (mm/cól, thread) 50/ 6/4“ internal 50/ 6/4“ internal

Max. recommended pipe length (m) 30 30

Net unit dimensions (w/h/d) 870/950/320 870/950/320

Gross unit dimensions (w/h/d) 1020/1080/450 1020/1080/450

Net/Gross weight (kg) 67/73 69/75

Refrigerant/filling weight (type/kg) R410A/1.27 R410A/1.60

* The manufacturer reserves the right to change the parameters without any advance warning.

3.2 Swimming pool water parameters

The heat pump is designed for heating the swimming pool water, that 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.

It is advised to keep the water hardness on the lower limit of the optimal range, i.e. closely above 8
°N.

3.3 Heat pumps dimensions

Water outlet

6/4“inner/l 50mm

Water inlet
6/4“inner/l 50mm

Controller

Power supply

230V/50Hz

470 70

695

875

965

940

425

360

320

870

546

WARNING: The manufacturer
reserves the right to make
modifications and innovations on the
product that do not have any
negative impact on its technical

feautures and parameters.

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3.4 Description of the basic parts

Legend: 1

– Protecting grates of the fan (air outlet)

2 – Cover
3 – Control panel
4 – Valve for refilling the refrigerant (under the cover)
5 – Intake electric cable
6 – Water outlet connection hub
7 – Water inlet connection hub

3.5 Safety and control systems

The heat pump is equipped with the following systems:

Temperature based control of the heat pump operation:

 The heat sensor placed on the heat exchanger, ensures switching off of the heat pump

when reaching the requested water temperature. The normal operating mode gets
renewed if the water temperature in the exchanger drops by 3 °C (manufacturing
setting) below the requested value.

Safety systems:

 Water flow sensor placed on the heat exchanger inlet.

The water flow sensor switches on the heat pump when there is water flowing through
the heat pump exchanger, and switches it off when the water flow stops.

 Sensor of the minimal and maximal gas pressure in the cooling circuit.
 Heat sensor on the outlet from the compressor.
 Pause time.

The unit is equipped with a switching time delaying device with a set 3 minutes delay period, for
protecting the control elements in the circuit and eliminating repeated restarts and contactor
vibrations.This time delay will automatically restart the unit cca. 3 minutes after every single
interruption of the heat pump operation. Even if there is only a short interruption of the power
supply, the pause time will get activated, so the unit can not start the operation earlier than the

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