Worcester WORCESTER GREENSTORE Instrucciones de funcionamiento

WORCESTER GREENSTORE

6kW, 7kW, 9kW & 11kW Combi

HEAT PUMP

USER MANUAL

GB/IE

Table of Contents

Table of contents

BUILDING REGULATIONS ..................................................................................................................................3

Important information....................................................................................... 4

Technical support ...................................................................................................................................................4

How the heat pump works ................................................................................. 5

Technology in and around the heat pump................................................................................................................5

Component parts of the heat pump .................................................................... 7

Greenstore Combi....................................................................................................................................................7

Rego 637W Control unit.................................................................................... 8

The control unit’s two methods to control the heat pump..........................................................................................9

Control panel.................................................................................................. 10

Controls and status indicators ..............................................................................................................................10

Menu dial .............................................................................................................................................................11

How to use the control panel .................................................................................................................................11

Basic functions (Customer level 1) ................................................................... 11

Menu outline for Basic functions (Customer level 1).............................................................................................12

Select scrolling information on the menu display...................................................................................................12

Set the heating ......................................................................................................................................................13

Set the required room temperature........................................................................................................................16

Set the heat pump for extra hot water ....................................................................................................................16

Heating and hot water settings ..............................................................................................................................17

Read the temperatures on the heat pump...............................................................................................................17

Extra functions (Customer level 2) ................................................................... 19

Menu outline for Extra functions (Customer level 2).............................................................................................19

Temperature settings.............................................................................................................................................20

Set extra heat curve with mixing valve ..................................................................................................................21

Hot water settings..................................................................................................................................................22

Timer control........................................................................................................................................................22

Reading operating times on the heat pump and electric heater ..............................................................................23

Set the time and date ............................................................................................................................................24

Alarms given by the heat pump .............................................................................................................................25

Return to the heat pump’s factory settings..............................................................................................................25

User manual for the Worcester Greenstore Combi heat pumps

Worcester, 09.01.07

Part number: 8-716-113-341

Issue: a

BUILDING REGULATIONS

This appliance must be installed and serviced only by a competent person in accordance with the current: IEE Regulations,

Building Regulation, Building Standards (Scotland) (Consolidation), Building Regulations (Northern Ireland), local water

by-laws, Health & Safety Document 63S (The Electricity at Work Regulations 1989), IS 813 (Eire) and other local require-

ments.

The relevant Standards should be followed, including:

BS7074:1 : Code of practice for domestic and hot water supply

EN:12828 : Central heating for domestic premises

BS7593 : Treatment of water in domestic hot water central heating systems

BS EN 14511

BS EN 814

BS EN 378

The Health and Safety at Work Act 1974

The Management of Health and Safety at Work Regulations 1999

The Construction (Health, Safety and Welfare) Regulations 1996

The Construction (Design and Management) Regulations 1994

The Lifting Operations and Lifting Equipment Regulations 1998

Where no speciﬁc instruction is given, reference should be made to the relevant codes of Practice.

Potable water:

All seals, joints, compounds (including ﬂux and solder) and components used as part of the secondary domestic water

system must be approved for use with potable water supplies.

PRODUCT CONTENTS LIST 600mm

1800mm

600mm

Greenstore Combi Heat Pump.

Components included in delivery:

Rubber feet

Outdoor sensor T2 (GT2) with cable

Room sensor T5(GT5)

Return sensor T1 (GT1)

4 bar Pressure Relief Valve

Valve with ﬁlter

Circlip pliers

Drain plug

Ball valve

Expansion vessel

Filling link with insulation and ﬁlter

Unvented cylinder kit:

DHW expansion vessel

Expansion Vessel Hose

Wall mounting kit for expansion vessel

High ﬂow rate inlet control set

Acetal tundish

Literature pack:

User manual

Installation manual

Guarantee card

Note

It is important as the user that you

read through these instructions.

Under no circumstances should the

user make settings that are designed

for the installer.

Important information

Your new Greenstore Combi heat pump represents a new generation of

heat pump from Worcester. It contains numerous functions to control the

temperature and production of hot water in the house. The Rego 637W

control unit is the brains of the heat pump. The Rego 637W includes a

control and monitoring function that stores important settings about the

heat pump’s operation and maintenance. The settings are made by the

installer and the user via a control panel on the front of the heat pump.

Settings intended for the user, are presented under the headings Basic

functions and Extra functions.

When the heat pump has been installed and started there are a number

of points you should check regularly. For initial setup, commissioning

and further fault advice, you should contact your installer. This manual

describes each step in detail.

Technical support

For technical support please contact:

Technical Pre & Post sales

Tel: 08705-266241

Fax: 01905-752741

How the heat pump works

The heat pump has been manufactured for easy and reliable use as well as to provide your house with inexpensive and

environment friendly heating. The easiest way to describe how a heat pump works is to say it works like a refrigerator, but

in reverse. In a refrigerator, heat is moved from the inside to the outside. In a heat pump, heat stored in the ground, rock

or water, is moved into the house. The heat pump collects the stored solar energy. The heat is transferred into the house

via a collector system. The temperature is then increased in the heat pump and the heat is distributed to the house heating

system.

The heat pump collects stored solar energy

Boiling point in relation to the

pressure:

The boiling point of different liquids

varies with pressure, the higher the

pressure, the higher the boiling point.

For example, water boils at +100ºC

at normal pressure. Double the pres-

sure and water boils at +120ºC. Half

the pressure and water then boils at

+80ºC. The refrigerant in the heat

pump acts in the same way, the boil-

ing point changes when the pressure

changes. However, the boiling point of

the refrigerant is as low as approxi-

mately -40ºC at atmospheric pressure.

Consequently, it is also suitable for

low heat source temperatures.

Note

Rock heat Soil heat Lake heat

The heat pump consists of four main parts:

1. Evaporator

The evaporator turns the refrigerant to gas and transfers heat from the

heat transfer ﬂuid to the refrigerant circuit.

2. Condenser

The condenser turns the vapour to ﬂuid again and transfers the heat to

the heating system.

3. Expansion valve

Lowers the pressure of the refrigerant.

4. Compressor

The compressor increases the pressure and temperature of the

refrigerant.

These four main parts are linked in three circuits. A refrigerant circulates

in the heat pump, which in some parts of the circuit is in a liquid state and

in other parts in a gaseous state. Read more about the properties of the

refrigerant in the text box to the right.

See the detailed description of the technologies used in the heat pump on

the next page.

Technology in and around the heat pump

How the heat pump works

Heat transfer ﬂuid in. The heat pump collects stored solar energy. It contains a heat transfer ﬂuid which is a

solution of water and glycol. This antifreeze mixture collects the heat from the earth or rock and is fed into

the evaporator. The temperature is on average around 3-5ºC.

In the evaporator, the heat transfer ﬂuid meets the refrigerant. At this stage, the refrigerant is in a ﬂuid state

and is at approximately -10ºC. When the refrigerant meets the heat transfer ﬂuid it starts to boil. It then forms

a vapour, which is fed into the compressor. The temperature of the vapour is around 0ºC.

The pressure of the refrigerant increases in the compressor and the vapour temperature rises from 0ºC to

approximately +125ºC. The hot gas is then forced into the condenser.

The condenser transfers the heat to the heating system (underﬂoor heating or perhaps radiators) and the hot

water system. The vapour is cooled in the condenser and becomes liquid. The pressure in the refrigerant is

still high when it reaches the expansion valve.

The refrigerant pressure is lowered in the expansion valve. At the same time, the temperature also drops to

approximately -10ºC. When the refrigerant passes the valve and the evaporator it changes to vapour again.

The expansion valve also regulates the amount of refrigerant fed into the evaporator.

The heat transfer ﬂuid is led out from the heat pump to the ground loop to collect new stored solar energy.

The temperature of the ﬂuid is approximately 3ºC cooler than the ﬂow in.

Underﬂoor heating

Radiator

Fan-assisted

radiator

Heat pump

Rock

Soil

0ºC

-3ºC

0ºC +100ºC

-10ºC

2 3 4

5Heating system

pump

Heat transfer ﬂuid

pump

How the heat pump works

The heating circuit

The collector circuit

Component parts of the heat pump

Greenstore Combi

Reset button

Press in the button if the overheat

protector on the electric cassette

has tripped. The button is located

on the side.

Heat carrier pump

The pump ensures the primary

water circulates within the heating

system or domestic hot water

systems.

Compressor

The compressor increases the

pressure of the refrigerant.

The temperature of the vapour

increases from 0ºC up to approxi-

mately +130ºC. The compressor is

insulated to reduce the noise level.

Electrical connections

Connections for the mains supply

as well as sensors.

Control panel

The control panel has a back lit

menu display with four rows of

text information, three buttons and

a dial.

Distribution box

The distribution box is enclosed.

It houses a reset function for the

motor cut-out as well as miniature

circuit breakers (MCB) for the

heat pump and electric heater.

Heat transfer ﬂuid pump

The pump is insulated and features

an anti-corrosive ﬁnish. It ensures

the heat transfer ﬂuid circulates

from the energy source to the heat

pump.

Control unit

The control unit is enclosed. It

controls and monitors all heat

pump functions.

Expansion valve

Lowers the pressure and regulates

the amount of refrigerant that

enters the evaporator.

Sight glass

Sight glass to check the level in

the refrigerant circuit. Gas bubbles

should not form continuously in the

sight glass when the heat pump is

running. However, there might be

bubbles for several minutes when the

heat pump is started. These will then

disappear

Flexible hoses

The hoses counteract vibra-

tions in the heat pump.

Evaporator

The evaporator evaporates the

refrigerant to gas and transfers

heat from the heat transfer ﬂuid to

the refrigerant circuit.

Electric heater

The electric heater is used to

provide extra output in cold

weather conditions, with large

water consumption and at hot

water peaks.

Three-way valve

The valve switches between

heating the heating water and

domestic hot water.

Condenser (not visable)

The condenser condenses the

refrigerant vapour to a liquid

again and transfers the heat to the

heating system.

Hot water cylinder

The cylinder is double-shelled and

holds approximately 185 litres of

domestic hot water and 40 litres of

primary water.

Venting nipple

The nipple is used to vent the

primary water in the hot water

cylinder.

Softstart

Reduces the compressors starting

current.

Rego 637W Control unit

The control unit is the brains of the heat pump. It makes sure the heat

pump gives the best energy savings. The control unit controls and

monitors the heating and hot water supply in your house. The monitoring

function is especially important. It shuts down the heat pump in the event

of operational abnormalities so that no critical parts are damaged.

Electric heater gives more output

If the heat pump cannot manage to heat the house by itself, for example,

there is a considerable drop in the outdoor temperature, the control unit

ensures the additional electric heater is connected. The heat pump and

electric heater help to maintain the temperature required in the house.

The electric heater only adds the output necessary for the heat pump to be

able to produce the right temperature. When the heat pump can once again

manage heating on its own the electric heater is automatically discon-

nected.

Domestic hot water (DHW) is given priority over

central heating water

The integrated hot water cylinder is ﬁtted with a sensor that measures the

temperature of the hot water. The Rego 637W ensures that priority is given

to the domestic hot water (DHW) over the heating demands.

Control unit

Electric heater

Rego 637W Control

The control unit’s two methods to control

the heat pump

The control unit uses two different methods to control the heat pump.

These two methods are A or B, as below:

A: Control with outdoor sensor

A sensor is installed outside on a North facing wall of the house. Control

with an outdoor sensor means that the heat pump automatically regulates

the heating in the house depending on the outdoor temperature. If the

outdoor temperature drops, the radiators/underﬂoor heating inside the

house will become warmer.

The user determines the response from the heat pump in relation to

the outdoor temperature, with the help of a number of settings such as

selecting the heat curve on the control unit. Further explanation is given

later in this manual.

B: Control with outdoor sensor supplemented with

room sensor

Control with an outdoor sensor supplemented with a room sensor means

that you also place a sensor in a reference position inside the house. This is

connected to the heat pump and provides the control unit with information

about the room temperature. The signals affect the control unit’s settings

(heat curves) and ensure the heat pump gives the best possible energy

savings.

It is only the room where the room

sensor is located that can inﬂuence

regulation of the temperature.

Note

Rego 637W Control unit

Note

The room sensor inﬂuence is inhibited

2 hours after using clock setting for

the heating, or any type of external

control of the heat pump.

Control panel

All settings are made on the control panel. It also displays heat production

statistics and information about different alarms. When you have made your

settings, the control panel makes sure they are saved in the control unit.

Menu dial

Status indicators

Power switch

(ON/OFF)

Controls and status indicators

Power switch (ON/OFF)

Indicator on: Mains power ON.

Indicator ﬂashes: Mains power OFF.

Operating status

Indicator on: The heat pump (compressor) is

operational.

Electric heater status

Indicator on: The heat pump is using additional

heat from an electric heater.

Hot water status

Indicator on: The heat pump is heating DHW in

the cylinder.

Indicator ﬂashes: The heat pump has a hot water

peak or is producing extra DHW.

Alarm status

Indicator ﬂashes: A fault has occurred in the heat

pump.

Indicator on: The alarm has been acknowledged

by the end user, but the fault remains. (See

section; What to do if a fault occurs).

Temp. incr. /

decr. Heat

Pressing once gives a shortcut to the most frequently

used temperature settings.

Info

Pressing once gives continuous information about the

heat pump and electrical heater operating conditions.

Press once to enter the main menu.

The main menu contains all the setting menus and

temperature displays.

Info

Menu buttons

Menu display

Control panel

Rego 637W K1

060822 16:08:15 Tu

Heat Info Menu

Rego 637W K1

060822 16:08:15 Tu

Heat Info Menu

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