GAH Electrastream Istruzioni operative

A complete cost effective solution for Hot and Cold

water supply and Electric Central Heating with water

filled radiators, suitable for Self-contained Flats, Small

Dwellings, Offices, Home Offices and Granny Annexes.

PlusPlus

Plus

ElectrastrElectrastr

Electrastream Pluseam Plus

eam Pluseam Plus

eam Plus

ElectrastrElectrastr

Electrastreameam

eameam

eam

Patents GB23449908 + Application 01514800.2 WRC Approval Pending

USER and INSTALLATION

INSTRUCTIONS

05/12/06

30,000 - 9kW for Heating and Hot Water

CONTENTSCONTENTS

CONTENTS

1 INTRODUCTION1 INTRODUCTION

1 INTRODUCTION

2 OPERA2 OPERA

2 OPERATOR CONTROLSTOR CONTROLS

TOR CONTROLSTOR CONTROLS

TOR CONTROLS

3 TECHNICAL INFORMA3 TECHNICAL INFORMA

3 TECHNICAL INFORMATIONTION

TIONTION

TION

5 COMMISSIONING5 COMMISSIONING

5 COMMISSIONING

7 F7 F

7 FAULAUL

AULAUL

AULT FINDINGT FINDING

T FINDINGT FINDING

T FINDING

CONTENTSCONTENTS

CONTENTS

Section 1 IntrSection 1 Intr

Section 1 Introductionoduction

oductionoduction

oduction

1-1 Introduction ---------------------------------------------- 2

1-2 System Layout ------------------------------------------- 4

1-3 Immersion Heater Operation ------------------------------ 6

6 SERVICING6 SERVICING

6 SERVICING

4 INST4 INST

4 INSTALLAALLA

ALLAALLA

ALLATIONTION

TIONTION

TION

IMPORTANT

BEFORE STARTING THE INSTALLATION OF THE ELECTRASTREAM CHECK ALL COMPONENTS HAVE

BEEN DELIVERED AND ARE IN SATISFACTORY CONDITION.

Section 2 Operator ContrSection 2 Operator Contr

Section 2 Operator Controlsols

olsols

ols

2-1 System Control ------------------------------------------- 7

2-2 Electrastream Control Unit -------------------------------- 9

2-3 Shut Off Valves ------------------------------------------ 12

2-4 Expansion Relief Discharge ------------------------------ 13

2-5 Thermostatic Mixing Valve ------------------------------ 14

2-6 Servicing ------------------------------------------------ 14

Section 3 TSection 3 T

Section 3 Technical Informationechnical Information

echnical Informationechnical Information

echnical Information

3-1 Specifications ------------------------------------------- 15

3-2 Dimensions --------------------------------------------- 16

3-3 Wiring --------------------------------------------------- 18

Section 4 InstallationSection 4 Installation

Section 4 Installation

4-1 Building Control ----------------------------------------- 19

4-2 Electrical ------------------------------------------------ 19

4-3 Hot Water System --------------------------------------- 20

4-4 Heating System ----------------------------------------- 22

4-5 Expansion Discharge ------------------------------------ 25

4-6 System Pressure ---------------------------------------- 27

4-7 Parts Supplied - ----------------------------------------- 28

Section 5 CommissioningSection 5 Commissioning

Section 5 Commissioning

5-1 Commissioning Checks --------------------------------- 32

5-2 Handing Over ------------------------------------------- 34

Section 6 ServicingSection 6 Servicing

Section 6 Servicing

6-1 Routine Service ----------------------------------------- 35

Section 7 Fault FindingSection 7 Fault Finding

Section 7 Fault Finding

7-1 Fault Finding -------------------------------------------- 36

1-1 Introduction

INTRODUCTION 1INTRODUCTION 1

INTRODUCTION 1

Note

For components supplied with system refer

to page 28.

Fig. 1-1a Electrastream

ELECTRASTREAM PLUS ELECTRASTREAM

This Handbook has been compiled to assist in the Installation and Operation of GAH

(HEATING PRODUCTS) LIMITED Electrastream domestic hot and cold water and central

heating system.

After installation the Installer of the system should give full operating instructions to the

householder for the Electrastream System.

1-1.1 The Electrastream System

The Electrastream system by GAH (Heating Products) Ltd. has been developed as a cost

effective solution for domestic hot and cold water and electric central heating with water

filled radiators.

Electrastream is suitable for flats, small dwellings, offices, home offices and granny

annexes.

1-1.2 Basic Principles

Electrastream is available in two options:-

ELECTRASTREAM PLUS - with cold water storage (accumulator)

ELECTRASTREAM - without cold water storage.

Water in the unvented cylinder is heated by a high powered titanium electric immersion

heater. Hot water is drawn from the cylinder and mixed with cold water by a thermostatic

mixing valve; this ensures safer lower temperatures at the hot water outlets.

The hot water within the unvented indirect cylinder also heats the water for the heating

system via the indirect coil within the cylinder. The circulating pump for the heating

system is controlled by a thermostat and programmable timer with override so that heat

is available on demand, providing there is a supply of hot water.

ELECTRASTREAM PLUS

The Electrastream Plus system is supplied with a cold water storage.

The accumulator has an internal controlled butyl diaphragm, incoming cold water is

stored within this diaphragm at mains pressure. The air space between the diaphragm

and the accumulator case is pressurised, this balances the supply and maintains

pressure to the unvented hot water cylinder and cold outlets. When hot and cold water

outlets are turned on, the stored water from the accumulator supplements water from the

incoming main, this results in consistent pressure and flow to all taps, showers and baths

even when outlets are used simultaneously. Pressure will be sustained for as long as the

accumulator is holding sufficient volume of water.

INTRODUCTION 1INTRODUCTION 1

INTRODUCTION 1

1-1.3 Electrastream System Features

ELECTRASTREAM AND ELECTRASTREAM PLUS

1. Only water and electric economy tariff services required.

2. No gas or oil - no Boiler.

3. Central heating with conventional water filled radiators.

4. Heat on demand 24 hours a day.

5. Can be timed for economy tariff.

6. Far more flexible heating control than storage radiators.

7. Hot and cold water supply from GAH Dualstream technology.

8. Hot water to taps and shower from unvented cylinder.

9. Hot water to outlets temperature controlled by thermostatic mixing valve.

10. Mains pressure to hot and cold outlets.

11. All plumbing, water storage and controls are within the dwelling - no header tank.

12. Low maintenance cost, no CORGI Landlord Certificate required.

13. 9kW titanium immersion heater (combined 3 x 3kW).

14. Immersion heater will still work should one or two of its elements fail.

15. Stainless Steel Unvented Cylinder with 20 years guarantee.

ELECTRASTREAM PLUS

1. Balanced hot and cold supply to taps.

2. All taps and showers at maximum system pressure.

3. Pressure maintained for both hot and cold taps even when other taps are open

(subject to volume used).

ELECTRASTREAM SOLAR

The Electrastream system is suitable for Solar water heating - for further details consult

GAH (Heating Products) Ltd.

Thermostatic

Mixing Valve

Twin Coil Cylinder

Incoming

Water Main

Electrastream

Immersion

Heater

Pump

Accumulator

Coldwater torage

Electrastream

Control

Bottom Coil

heated by olar

olar

Collectors

olar

Control

Fig. 1-1b Electrastream and Solar Application

INTRODUCTION 1INTRODUCTION 1

INTRODUCTION 1

1-2 System Layout

Fig. 1-2a Typical Schematic Installation - Electrastream

Fig. 1-2b Typical Schematic Installation - Electrastream Plus

✓PARTS SUPPLIED

INTRODUCTION 1INTRODUCTION 1

INTRODUCTION 1

Note

All installations must comply with relevant

regulations - refer to section 4-1.

1-2.1 Hot & Cold Water Supply

Refer to fig. 1-2a for Electrastream.

Refer to fig. 1-2b for Electrastream Plus.

The incoming mains water supply is connected to the combination valve which is

assembled to the unvented indirect hot water cylinder. The combination valve has an

integral check valve. A double check valve is supplied, this is only required to be fitted if

back syphonage is possible from any item fitted prior to the combination valve. A

connection must be provided for the system fill.

Also provision has to be made for water softener and outside tap as applicable.

The combination valve limits the incoming pressure to 3.5 Bar, it has an integral non-

return valve and pressure relief valve (PRV).

Supply to the hot outlets is taken from the cylinder and mixed with cold water by the

thermostatic mixing valve (supplied), this ensures that a safer lower temperature hot

water is available at outlets.

ELECTRASTREAM ONLY

Cold supply to all outlets is taken direct from the main supply. If the mains pressure is

high (over 3.5 Bar) a pressure reducing valve is recommended.

ELECTRASTREAM PLUS

The incoming mains supply is connected to the combination valve. Once passed the

valve it supplies the accumulator and the hot water cylinder.

Supply to the cold outlets is taken from a Tee fitting at the base of the accumulator.

1-2.2 System Control

The system is controlled by a purpose designed Electrastream Control unit, this controls

the hot water and heating ON/OFF times together with the heating pump and valve. The

control also has a dedicated programme that ensures efficient use of electricity by

selecting how many of the three immersion heater elements are required to meet the

current demand for heating or hot water. It also incorporates an automatic heating

element test function.

1-2.3 Heating System

The heating system has water filled radiators and is a standard ‘sealed system’. The

water for the heating is heated by being pumped through the indirect coil of the indirect

cylinder. A room thermostat and the Electrastream Control unit’s programmable timers

control the circulating pump and motorised valve.

1-2.4 Electric System

The unvented cylinder is heated by a 9kW (combined 3 x 3kW) titanium immersion

heater. This is controlled by the cylinder temperature sensor and the Electrastream

Control unit.

Electrastream is designed to make full use of economy tariff electricity supplies and the

wiring must be arranged to make full use of this.

1-2.5 Output

The 9kW immersion heater provides 30,000 Btu (9kW) for heating and hot water.

GAH offer a range of quality Water

Softeners, for information contact

GAH (HEATING PRODUCTS) LTD.

1-2.6 Scale Protection

IMPORTANT All installations should have a scale protection device fitted

and in areas known to have hard water, a water softening device is

strongly recommended.

GAH recommend and promote the use of scale prevention devices and water softeners in

areas that are known to have hard water. Installed correctly they prolong the life of

equipment and help prevent limescale formation in the pipework. Water softeners

provide the advantages of soft water, as well as preventing scale build up on taps and

shower heads.

Water softeners and any mains fed system must be of adequate capacity and should be

installed with suitably sized hoses to prevent any possibility of flow reduction.

1-2.7 Frost Protection

When planning the installation location of both the accumulator and the unvented

cylinder, consideration must be given to the risk of frost and the use of frost protection.

The design of the accumulator gives it a degree of frost protection enabling it to be

located within the dwelling, loft space or garage without further protection.

The cylinder can also be installed within the dwelling or loft space without further

protection.

Cylinders or accumulators must have frost protection when they are installed where low

temperatures could be a potential problem. Cylinders can be protected by a frost

thermostat.

To comply with Building Regulations, all necessary pipework must be suitably lagged.

1:2.8 Handling and Storage

The Electrastream system will be delivered fully wrapped and palleted.

Lift the package carefully using a safe and suitable lifting method.

Keep the packaging intact and store in a secure dry and weatherproof area prior to

installation.

INTRODUCTION 1INTRODUCTION 1

INTRODUCTION 1

1-3 Immersion Heater Operation

The three immersion heater elements are switched on and off by the Electrasteam

Control. They have a staggered switch on sequence that prevents sudden high load on

the power supply.

The control also limits the use of the elements for efficiency.

When the hot water within the cylinder is within 2° of the set (8) Target ##°C only one

element will be on.

When the hot water within the cylinder is within 2° and 4°C below the set (8) Target

##°C then two elements will be on.

When the hot water within the cylinder is below 6°C of the set (8) Target ##°C then all

three elements will be on.

OPERAOPERA

OPERATOR CONTROLS 2TOR CONTROLS 2

TOR CONTROLS 2TOR CONTROLS 2

TOR CONTROLS 2

2-1 System Control

Fig. 2-1a Schematic of Typical Controls

The heating and hot water system is all electric. The hot water for the taps (outlets) and

radiators is heated by the immersion heater in the cylinder.

The system will have the following controls.

2-1.1 Isolating Switch

The system will have a double pole isolating switch with neon and mechanical indicators.

This could be a pull cord or wall mounted type.

When the switch is ON (neon on) the system is operational.

When the switch is OFF (neon off) no hot water or heating will be available.

It is advised to turn the switch off when hot water and heating are not required, i.e.

holidays etc.

2-1.2 Immersion Heater

WARNING The immersion heater does not have an internal thermostat

(like most immersion heaters) the cover should not be removed.

When the cover is removed live electrical terminals are exposed.

ISOLATE THE IMMERSION HEATER BEFORE REMOVING ITS COVER.

2-1.3 Thermal Cut-Out Thermostat

In the thermostat box on the cylinder is the thermal cut-out thermostat. This prevents the

water within the cylinder from overheating.

The immersion heater thermal cut-out thermostat is a manual reset type, this means it

has a small button that pops up when the thermostat has been tripped by overheating.

To reset the system after overheating, switch heating and hot water OFF, allow time for

the water to cool, or run off some hot water, then remove the cap and press the button.

If the immersion heater thermal cut-out trips more than once, switch off the Electrastream

isolating switch and contact your installer.

Fig. 2-1b Isolating Switch

Fig. 2-1c Thermal Cut-Out Thermostat

MANUAL RESET

BUTTON

OPERAOPERA

OPERATOR CONTROLS 2TOR CONTROLS 2

TOR CONTROLS 2TOR CONTROLS 2

TOR CONTROLS 2

2-1.4 Heating Motorised Valve

When the room thermostat is calling for heat and the Electrastream Control is set for heat

ON, the heating motorised valve will open allowing water to the radiators.

Display icon ‘Valve ’ indicates the valve is open.

2-1.5 Pump

The heating circulating pump is controlled by the Electrastream Control unit in response

to the room thermostat.

The pump has 3 speeds, it is normally set to speed 2.

Display icon ‘Pump ’ indicates the pump is ON.

2-1.6 Room Thermostat

The room thermostat controls the heat within the dwelling.

When the room thermostat is calling for heat and the Electrastream Control is set for heat

ON, the heating circulating pump will run, pumping water through the radiators.

Display icon ‘Therm ’ indicates the room thermostat is calling for heat.

OPERAOPERA

OPERATOR CONTROLS 2TOR CONTROLS 2

TOR CONTROLS 2TOR CONTROLS 2

TOR CONTROLS 2

2-2 Electrastream Control Unit

Fig. 2-2a Electrastream Control Unit - Normal Screen

2-2.1 Control Unit Display - Normal Screen

HEAT 1 Indicates Element 1 is ON

HEAT 2 Indicates Element 2 is ON

HEAT 3 Indicates Element 3 is ON

VALVE Indicates Heating Valve is OPEN

PUMP Indicates Heating Pump is ON

THERM Indicates Room Stat is calling for heat

Heating on

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