Oilon RE 140 Operating instructions

RE03 1406 EN

Installation and operation manual

Oilon RE 110 - RE 170

Read these instructions carefully before installation, use, or maintenance

RE03 1406 EN 1 (48)

Contents

1. Introduction

1.1. Warnings....................................................................................................... 3

1.2. Transportation and storage.......................................................................... 3

1.3. Delivery content, optional equipment and accessories................................ 4

1.4. Control system.............................................................................................. 4

1.5. Ground source heat pump operating principle............................................. 5

1.6. Ground source heat pump features............................................................. 6

1.7. Coefficient of performance........................................................................... 7

1.8. Ground source heat pump sizing................................................................. 7

1.9. Collecting heat.............................................................................................. 8

2. Installation

2.1. Installation site requirements........................................................................9

2.2. Main components........................................................................................10

2.3. Connections................................................................................................ 11

2.4. Piping diagrams.......................................................................................... 12

2.5. Installing filters............................................................................................ 17

2.6. Connecting to cooling systems...................................................................17

2.7. Electrical connections................................................................................. 18

3. Commissioning

3.1. Fuses and switches.................................................................................... 20

3.2. Prerequisites for commissioning.................................................................20

3.3. Commissioning the system.........................................................................21

3.4. Relay test.................................................................................................... 22

3.5. Adding heating circuits............................................................................... 22

3.6. Configuring heating curve...........................................................................23

3.7. Connecting solar heating............................................................................24

3.8. Configuring alarm output............................................................................ 24

4. Operation

4.1. Control panel...............................................................................................25

4.2. Changing settings....................................................................................... 28

4.3. Changing user level....................................................................................29

4.4. Setting language......................................................................................... 29

4.5. Setting time and date................................................................................. 29

4.6. Configuring domestic hot water settings.................................................... 30

4.7. Operating lines............................................................................................30

5. Maintenance

5.1. Annual maintenance................................................................................... 35

5.2. Cleaning the brine circuit filter....................................................................35

5.3. Troubleshooting...........................................................................................35

2 (48) RE03 1406 EN

5.4. Compressor protection device....................................................................37

6. Technical data

6.1. Technical data.............................................................................................39

6.2. Condenser and evaporator circuit flow and pumps....................................40

6.3. Spare parts................................................................................................. 46

RE03 1406 EN 3 (48)

1. Introduction

1.1. Warnings

Read these instructions carefully before installing, adjusting or maintenance of the

device. Follow the given instructions.

Throughout this manual, the following warnings are used to point out information:

Be careful. The symbol indicates a possible danger of bodily

harm or lethal injury if instructions are not followed.

Pay attention. The symbol indicates a possible danger

of damage to the device, components or surroundings if

instructions are not followed.

Read this instruction. Note indicates important information.

1.2. Transportation and storage

Transport and store the heat pump in a vertical position.

Transport the heat pump to the installation site on its

transporting platform.

Be careful when lifting the heat pump. Use appropriate lifting tools.

You can lift the heat pump from the bottom with hand truck.

4 (48) RE03 1406 EN

1.3. Delivery content, optional equipment and accessories

Standard delivery content

Heat pump standard delivery includes the following:

● heat pump

● condenser pump

● ground circuit pump

● temperature sensor for outdoors

● temperature sensor for supply water

● 3 temperature sensors for buffer tanks

● installation and operation manual, electrical drawings

● installation, commissioning and warranty records

● maintenance sheets.

Optional equipment

In addition to the standard delivery content, the following optional equipment may be

separately ordered:

● desuperheater package (includes exchanger, circulation pump and hoses)

● wired or wireless remote control unit, including room temperature sensor

● Smartweb connection.

Accessories

When installing the heat pump, depending on the installation site, few extra

accessories and devices maybe needed. Among other things, the following

accessories may be separately ordered:

● ground circuit diaphragm expansion tank

● ground circuit safety valve

● heating circuit diaphragm expansion tank

● heating circuit 3 or 4-way valves

● electric cables needed outside the heat pump

● heating system expansion tank

● pump for heating circuits 1, 2 and 3

● mixing valve for domestic hot water

● heating system safety valve (1,5 bar)

● heating system pressure gauge (0–4 bar)

● ground circuit pressure gauge (0–4 bar)

● filters for ground circuit and heating circuit

● flexible connection hoses for brine and condenser circuits with seals

● pipes and pipe accessories.

1.4. Control system

The heat pump is equipped with an automatic control system which manages heating

and domestic hot water production. The control system includes the built-in automation

system, the sensors attached to it, and a control panel. Browsing and changing system

settings is done on the control panel. It is also used for browsing and resetting error

notifications.

RE03 1406 EN 5 (48)

A remote control unit (option) can also be used for browsing and changing system

data and error notifications. The remote control unit can also be used as a remote

temperature sensor, providing the control system with room temperature data.

The system settings have been organised into menus, similar to folders on a computer.

In addition, there are various user levels in the system. The visibility of menus or

menu items depends on the user level. To access user levels other than End user or

Commissioning, you need an access code.

1.5. Ground source heat pump operating principle

A ground source heat pump is a device that uses heat energy from the Sun that is

absorbed into Earth’s surface.

A

B

C

RE15 ver. 2

1. Evaporator

2. Compressor

3. Condenser

4. Expansion valve

A. Brine circuit

B. Refrigerant circuit

C. Heating circuit

There are three closed circuits running within, or through, the heat pump:

● brine circuit

● refrigerant circuit

● heating circuit.

The heat pump's operation is based on the vaporisation and condensation of the

refrigerant circulating within the heat pump.

The brine circuit is a circuit for collecting heat energy from the ground. When the brine

enters to the circuit at the evaporator, it is very cold. As it travels along the circuit, it

collects heat energy from the ground or water, which causes the brine temperature

to rise. The brine completes its circuit by returning to the evaporator and releasing

the heat energy into the refrigerant, which circulates between the evaporator and the

condenser.

6 (48) RE03 1406 EN

When the refrigerant is in the condenser, it is colder than the brine, so the heat

energy transfer from brine into refrigerant can take place. The heat transfer raises the

temperature of the refrigerant up to the point where it becomes gaseous.

The gaseous refrigerant is then led into a compressor, which compresses it into a

high pressure. As the pressure of the gaseous refrigerant increases, so does its

temperature.

Next, the high-pressure gaseous refrigerant is led into the condenser, where it releases

its heat energy into the water that circulates between the heat pump and the buffer

tank. As the refrigerant releases its heat energy and its temperature drops, it becomes

liquid again.

The liquid refrigerant is then led into an expansion valve, where the pressure and

temperature are lowered further. The refrigerant completes its circuit by returning back

to the vaporiser, where it receives heat energy from the brine circuit.

1.6. Ground source heat pump features

RE17 ver. 1

1. Evaporator

2. Compressor

3. Condenser

4. Expansion valve

5. Desuperheater (option)

6. Liquid injection

A. Brine circuit

B. Refrigerant circuit

C. Condenser circuit

D. Desuperheater circuit

E. Domestic hot water

F. Heating circuit out

G. Domestic cold water

H. Heating circuit in

RE03 1406 EN 7 (48)

The RE heat pump is always connected to separate buffer tank or buffer tanks.

Domestic hot water is warmed up in hot water loops inside buffer tank. Preheating loop

can be located in the middle of the same buffer tank or in another buffer tank. Rest of

the heating is carried out by loop in the upper part of the buffer tank or loop in separate

domestic hot water buffer tank.

For all RE heat pumps desuperheater functionality can be ordered as an option.

The compressors are equipped with liquid injection functionality. In case the

temperature of the refrigerant gets too high in the compressor, low temperature

refrigerant is injected to the compressor. This functionality enables higher temperature

taken out from the heat pump and optimizes the temperature and pressure for the

compressor. This functionality includes an own internal operating control system with

fault diagnostics.

1.7. Coefficient of performance

Heat pump efficiency ratios are compared by their coefficient of performance (COP)

values.

COP indicates the amount of heat energy produced by the heat pump divided by the

energy consumed by the heat pump.

COP depends largely on heat source and heating network temperatures. The highest

possible heat source temperature and the lowest possible supply water temperature

improve efficiency ratio.

1.8. Ground source heat pump sizing

Ground source heat pump can be sized to operate at

● partial capacity

● full capacity.

With partial capacity heat pump maximum capacity is sized up to correspond 60 – 80%

of a building’s maximum heating demand. In this case the heat pump produces the

most part of the building’s annual heat energy demand.

With partial capacity, heat pump operating periods are long during heating season.

This reduces the number of compressor stops and start-ups. During hardest freezing

periods at winter additional capacity from heat pump can be obtained with in-built

electric heater or oil boiler.

With full capacity, heat pump is sized up according to a building’s maximum capacity

demand, practically slightly over sized. With full capacity, the use of additional heating

capacity is minimised, thus in electric heaters’ case it is possible to use smaller fuse

size in electrical connection.

8 (48) RE03 1406 EN

1.9. Collecting heat

Oilon RE heat pump’s heat source is usually a drilled well. The number and depth of

wells depend on heating demand. Soil or water can also be used as heat source. Heat

is collected from soil using horizontal piping in 1–1.5 m depth. When using water the

piping is anchored to the bottom.

During heating period, the ground circuit fluid warms up a few degrees during

circulation. Collected heat is used to vaporise refrigerant in heat pump unit.

Horizontal piping requires applicable soil type and sufficient land area for piping.

Applicable soil types are fine grained and moist, such as clay or silt.

Drilled well is suitable for all locations except places where solid rock goes deep

underground.

When piping is installed into water, building should be located sufficiently close to

shoreline, preferably less than 50 m away. Water should also be sufficiently deep, over

2 m right from shore.

In addition, waste heat from industrial processes can be used as heat source for the

heat pump.

RE03 1406 EN 9 (48)

2. Installation

2.1. Installation site requirements

General site requirements

Follow local construction rules and regulations when installing

the heat pump.

In addition, make sure that the following requirements are met:

● The installation site must have a floor drain.

● Maximum temperature for the site is 40 °C.

● Minimum temperature for the site is 10 °C.

● The heat pump installation surface is horizontal and even.

● The heat pump is covered against moisture and water.

Refrigerant circulation site requirements

Refrigerant circulations are equipped with pressure relief valves. In fault situations they

burst out the excess pressure from the circulations.

Ensure that a possible burst of the refrigerant circulations’

pressure relief valves do not endanger people or properties.

When R410A refrigerant is used, if the amount of the used refrigerant compared to

the engine room’s volume is less than 0,44 kg/m3, it is not obligatory to pipe out the

pressure relief valves. For example, if the heat pump contains 32 kg of refiregerant, it is

not necessary to pipe out the pressure relief valves, if the room’s volume is more than

32 kg / 0,44 kg/m3 = 73 m3.

Follow the pressure equipment regulations and SFS-EN 13136 standard when piping

and dimensioning the refrigerant.

Space requirements

All heat pump connections are at the back of the device and with flexible hoses

they can be bent to desired directions. For installation, operating and maintenance

purposes, leave enough space on each side of the heat pump. The minimum space

requirements are listed below.

By default, the electric switchboard is attached to the left side of the heat pump. On

request, the electrical switchboard can be attached to the right side of the heat pump.

10 (48) RE03 1406 EN

RE01 ver. 2

Model/

Dimension RE 110, RE 140 and RE 170

a

(left)

800 mm

(100 mm, if electric switchboard

attached to the right side.)

b

(back) 300 mm

c

(right)

100 mm

(1200 mm, if electric switchboard

attached to the right side.)

d

(front) 800 mm

e

(top) 100 mm

2.2. Main components

MCRE03 ver. 3

RE03 1406 EN 11 (48)

Number Component Number Component

1 Main electrical switch 8 Compressor operating control

system (OCS) devices

2 Control panel 9 Refrigerant pressure double

relief valves with change valves

3 Cooling fan with filters 10 Refrigerant expansion tanks

4 Evaporator 11 Dryer-filters

5 Condenser 12 Expansion valves

6 Desuperheaters (optional) 13 Solenoid valves

7 Compressors

2.3. Connections

RE 110, RE 140 and RE 170

Connection positions and sizes are listed below.

RE10 ver. 3

Connection Size (external thread)

1 condenser out G 2 1/2

2 condenser in G 2 1/2

3 vaporiser in G 2 1/2

4 vaporiser out G 2 1/2

5 desuperheater in (optional) G 1 1/4

12 (48) RE03 1406 EN

6 desuperheater out (optional) G 1 1/4

7 and 8 plugged, do not connect -

9 and 10 holes for piping out refrigerant pressure

relief valves

-

2.4. Piping diagrams

2.4.1. Ground circuit piping

It is recommended to install line regulation valves with flow meters, shut-off valves and

pressure gauge as shown in the figure below. If there is a risk that the ground circuit

pipes are not clean, install two filters to the return line to ensure fluent flow.

RE04 ver. 2

A filters

B pressure gauge

C safety valve

D expansion tank

E line regulating valve with flow meter

RE03 1406 EN 13 (48)

Make approx. 1 m deep service well on top of heat well. Connect service wells to one

shared collector well using insulated pipes. One of the drilled wells can also operate as

a collector well. Fluid from collector well is led to heat pump well through two insulated

pipes.

2.4.2. Heating circuit piping

In the following, few examples of heating circuit piping options are presented.

Heat pump with desuperheater and buffer tank

PI RE ver. 6

1 heat pump A desuperheater out

2 buffer tank B desuperheater in

3 heating circuit C condenser out

BX11temp.sensor, supply water D condenser in

BX1 temp.sensor, buffer tank middle part E domestic hot water out

BX2 temp.sensor, buffer tank lower part F domestic hot water circulation

BX8 temp.sensor, buffer tank upper part G domestic cold water in

BX9 temp.sensor, outdoors  

14 (48) RE03 1406 EN

Heat pump with desuperheater, buffer tank and extra heating system

PI RE 1 ver. 6

1 heat pump A desuperheater out

2 buffer tank B desuperheater in

3 heating circuit C condenser out

4 extra heating system, e.g. electric or

oil heater

D condenser in

BX11temp.sensor, supply water E domestic hot water out

BX1 temp.sensor, buffer tank middle part F domestic hot water circulation

BX2 temp.sensor, buffer tank lower part G domestic cold water in

BX8 temp.sensor, buffer tank upper part  

BX9 temp.sensor, outdoors  

RE03 1406 EN 15 (48)

Heat pump with desuperheater and two external buffer tank

PI RE 2 ver. 6

1 heat pump A desuperheater out

2 buffer tanks B desuperheater in

3 heating circuit C condenser out

BX11temp.sensor, supply water D condenser in

BX1 temp.sensor, buffer tank middle part E domestic hot water out

BX2 temp.sensor, buffer tank lower part F domestic hot water circulation

BX8 temp.sensor, domestic hot water

buffer tank

G domestic cold water in

BX9 temp.sensor, outdoors  

16 (48) RE03 1406 EN

Heat pump with desuperheater, two external buffer tank and solar heating system

PI RE 3 ver. 4

1 heat pump A desuperheater out

2 buffer tank B desuperheater in

3 heating circuit C condenser out

4 solar heat collectors D condenser in

BX11temp.sensor, supply water E domestic hot water out

BX1 temp.sensor, buffer tank middle part F domestic hot water circulation

BX2 temp.sensor, buffer tank lower part G domestic cold water in

BX8 temp.sensor, domestic hot water

buffer tank

 

B6 temp.sensor, solar heat collector  

BX9 temp.sensor, outdoors  

RE03 1406 EN 17 (48)

2.5. Installing filters

At renovation sites, flush and clean the existing heating system.

A filter should always be installed on both the heating circuit return line and the brine

circuit return line before the heat pump.

Install a shut-off valve on both sides of the filter to facilitate easy

cleaning and replacing of the filter element.

2.6. Connecting to cooling systems

If the brine circuit is laid into boreholes, the collector circuit can also be used for cooling

the house. If the brine circuit is laid in surface soil or in water, it is not recommended to

connect it to a cooling system, as the soil and water temperature usually rises to such

levels that there is not much cooling capacity in the brine.

Take a separate branch from the brine circuit’s return line and lead it to an air-

conditioner with integrated cooling radiator or to a cooling radiator placed in separate

air intake duct. Install a separate circuit for the cooling radiator, equipped with own

rotary pump, see figure below.

GSHP26 ver. 4

A fan

B cooling radiator

C filter

D circulation pump

E regulating valve

F non-return valve

G ground circuit return line

H shut-off valves

For more detailed information in connecting to air conditioner,

refer to the manufacturer’s instructions.

18 (48) RE03 1406 EN

2.7. Electrical connections

A general description of the needed electrical connections is given in this section. The

actual connections should be made according to the wiring diagrams delivered with the

heat pump.

Do not connect devices that draw over 2 A of current directly to

the controller. Use a contactor instead.

Switches and fuses

Fuse sizeSwitch Device

RE 110 RE 140 RE 170

F1 Circuit breaker, compressor 1 63 A 80 A 80 A

F2 Circuit breaker, compressor 2 63 A 80 A 80 A

F3 Motor protection switch, ground

circuit pump

3,3 A 4,5 A 4,5 A

F4 Motor protection switch,

condenser circuit pump

2,0 A 2,0 A 2,0 A

F5 Motor protection switch,

domestic hot water circuit pump

2,0 A 2,0 A 2,0 A

F6 Motor protection switch,

desuperheater circuit

(optional)

2,0 A 2,0 A 2,0 A

F10 Circuit breaker, control system 6 A 6 A 6 A

Sensor connections

The sensor connections are illustrated and listed in the following.

The amount of sensors depends on the heat pump model and

accessories.

Some of the sensors are pre-connected.

RE03 ver. 2

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Oilon RE 140 Operating instructions

Oilon RE 140 Operating instructions

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