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Summary of Contents for GAH ITD 130
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Page 1: All Models
heating products T T T T T echnical and Installation manual echnical and Installation manual echnical and Installation manual echnical and Installation manual echnical and Installation manual All Models For owners, installers and service engineers... - Page 2 Ltd. oducts) Ltd. details included in this manual may not be correct at the time of printing. Any modification and improvements detailed in this manual does not commit GAH to update Building 846 any system previously supplied. Bentwaters Parks Front cover shows typical components.
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Page 3: Table Of Contents
CONTENTS CONTENTS CONTENTS CONTENTS CONTENTS CONTENTS CONTENTS CONTENTS CONTENTS CONTENTS Section 1 Intr Section 1 Intr oduction oduction Section 1 Intr Section 1 Intr Section 1 Introduction oduction oduction 1 INTRODUCTION 1 INTRODUCTION 1 INTRODUCTION 1 INTRODUCTION 1 INTRODUCTION 1-1 Introduction ---------------------------------------------- 2 1-2 System Layout ------------------------------------------- 3 1-3 System Requirements ------------------------------------ 4 Section 2 Operator Contr... -
Page 4: Introduction
GAH (HEATING PRODUCTS) LTD. rademark of GAH (HEATING PRODUCTS) L This Handbook has been compiled to assist in the Installation and Operation of GAH (HEA This Handbook has been compiled to assist in the Installation and Operation of GAH (HEA... -
Page 5: System Layout
3.5 Bar. Alternative system layouts are possible consult GAH Heating Products. A separate pressure reducing valve, set at 3.5 Bar is supplied, this should be installed to limit the incoming main pressure. To maintain maximum mains pressure to the kitchen tap and outside taps it can be fitted following these draw offs, when applicable. -
Page 6: System Requirements
INTRODUCTION INTRODUCTION 1-2.3 Typical Twin Coil Cylinder Layout 1 1 1 1 1 SOLAR COLLECTORS GAH (Heating Products) Ltd. supply a range of Solar Water Heating Systems that compliment the GAH Dualstream System. For further details consult GAH. SOLAR SYSTEM... - Page 7 GAH recommend and promote the use of scale prevention devices and water softeners in GAH offer a range of quality Water areas that are known to have hard water. Installed correctly they prolong the life of Softeners, for information contact equipment and help prevent lime-scale formation in the pipework.
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Page 8: Hot Water Temperature - Heating System
OPERA OPERA OPERATOR CONTROLS OPERA OPERA TOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS Hot Water Temperature - Heating System 2-1.1 Hot Water Control - Heating System Note When the hot water is heated by the heating system the temperature of the hot water at For 500 Cylinders see 2-2.2. -
Page 9: Hot Water Overheating
OPERA OPERA OPERATOR CONTROLS OPERA OPERA TOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS 2-2.2 Hot Water Control - 500 Cylinders When the hot water is heated by the electric Immersion Heater the temperature of the hot water at the taps is controlled by the Immersion Heater Thermostat which has an adjusting knob located on top of the plastic Immersion Heater cover. - Page 10 OPERA OPERA OPERATOR CONTROLS OPERA OPERA TOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS If the Immersion Heater Thermal Cut-Out Thermostat trips more than once, switch off the Immersion Heater and contact your installer. To reset 125,150, 210 & 300 Cylinders Isolate the Immersion Heater.
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Page 11: Shut Off Valves
OPERA OPERA OPERA OPERA OPERATOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS Shut Off Valves The Dualstream installation will have a number of shut off valves, the location of these will be dependent on the installation - fig. 2-4a shows a typical layout. HOT WATER SHUT OFF VALVE... -
Page 12: Expansion Relief
OPERA OPERA OPERA OPERA OPERATOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS Expansion Relief The Dualstream installation has a TPR Valve normally mounted on the cylinder. In the Note event of the pressure within the system becoming too high, the TPR Valve will vent. At least the Tundish or discharge pipe should remain in view, do not box in or A Tundish will be fitted in the system, this should be located in the same space or... -
Page 13: Specifications
² e r i e r i e z i ² *500 Cylinders the Immersion Heaters can be converted to 3 Phase - consult GAH for further information. - Page 14 TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMATION TION TION TION TION 3-1.2 Accumulator Membrane ..................Butyl for potable water Maximum pressure ..................... 7.0 Bar Minimum pressure ..................0.5/0.8 Bar Factory set pressure ....................2 Bar 3-1.3 Pipes All pipes should be sized to suit application.
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Page 15: Dimensions
TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMATION TION TION TION TION Dimensions 3-2.1 Accumulator Dimensions PRE-CHARGE VALVE - SCHRAEDER Essential Access ‘TEE’ FITTING 3 3 3 3 3 A A A A A B B B B B BASE VENTED TO PREVENT CONDENSATION &... - Page 16 TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMATION TION TION TION TION 3-2.2 Standard Direct and Indirect Cylinder Dimensions COMPRESSION FITTINGS ARE SUPPLIED TO ADAPT THE CYLINDER TAPPINGS TO THE PIPE SIZES SHOWN. TYPICAL PIPE ARRANGEMENTS SHOWN ØB ØB ØB TPRV...
- Page 17 TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMATION TION TION TION TION 3-2.3 Indirect Twin Cylinder Dimensions COMPRESSION FITTINGS ARE SUPPLIED TO ADAPT THE CYLINDER TAPPINGS TO THE PIPE SIZES SHOWN. ØB TWIN COIL CYLINDER ARE USED FOR SOLAR WATER HEATING APPLICATIONS SEE 1-2.3 40°...
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Page 18: Wiring
TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMATION TECHNICAL INFORMA TECHNICAL INFORMA TION TION TION TION Wiring 3-3.1 Immersion Heater - 500 Cylinders 500 cylinders have three 2kW immersion heater elements (total 6kW) and must be wired using 3 x 2.5mm² 20amp 3-core Heat Resistant Cables as shown. IMPORTANT ENSURE ALL TERMINALS THERMOSTAT... - Page 19 TECHNICAL INFORMA TECHNICAL INFORMA TECHNICAL INFORMATION TECHNICAL INFORMA TECHNICAL INFORMA TION TION TION TION 3-3.2 Immersion Heater - 125, 150, 210 and 300 Cylinders THERMOSTAT EARTH (green yellow) 2.5mm 20A 3-CORE HEAT RESISTANT CABLE IMMERSION HEATER LIVE (brown) DOUBLE POLE SWITCH NEUTRAL (blue) brown...
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Page 20: Building Control
Part L 1 & 2) and HSE HSE requirements should be considered when installing a Dualstream System. Note GAH offer full unvented training packages 4-1.2 Electrical Regulations contact GAH (HEATING PRODUCTS). All wiring should carried out to and comply with the curr... - Page 21 Fig. 4-2c Combination Valve - Cylinders 500 4-2.4 Expansion Vessel An expansion vessel is supplied with the GAH Dualstream system. 4 4 4 4 4 The expansion vessel should be fitted to the combination valve, a ¾” BSP port is provided for this.
- Page 22 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 4 4 4 4 4 equipment and help prevent lime-scale formation in the pipework.
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Page 23: Expansion Discharge
INST INST INST INST INSTALLA ALLA ALLA ALLATION ALLA TION TION TION TION Expansion Discharge 4-3.1 Tundish The Tundish must be vertical and fitted within 500mm of the temperature and pressure relief valve and must be located with the cylinder. The tundish must also be in a position visible to the occupants, and positioned away from any electrical devices. - Page 24 INST INST INSTALLA INST INST ALLA ALLA ALLA ALLATION TION TION TION TION TPR VALVE COMBINATION VALVE METAL DISCHARGE PIPE D1 TO TUNDISH - 15mm TUNDISH FIXED GRATING TRAPPED GULLY CONTINUOUS FALL METAL DISCHARGE PIPE D2 4 4 4 4 4 FROM TUNDISH Fig.
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Page 25: Larger Systems
GAH (HEATING PRODUCTS) LIMITED. e information consult GAH (HEATING PRODUCTS) LIMITED. For mor For mor For more information consult GAH (HEATING PRODUCTS) LIMITED. e information consult GAH (HEATING PRODUCTS) LIMITED. e information consult GAH (HEATING PRODUCTS) LIMITED. 4 4 4 4 4... -
Page 26: System Pressure
The accumulator charge pressure is factory set at 2 Bar. The recommended accumulator charge pressure is 1.5 Bar below the mains pressure with an absolute minimum of 0.5/0.8 Bar - consult GAH Heating Products for further information. Also refer to 5-1.1. -
Page 27: Parts Supplied
INST INST INSTALLA INST INST ALLA ALLA ALLA ALLATION TION TION TION TION Parts Supplied 4-6.1 All models except 500 t r a s e t - e r u l p n i l r e d s r e n o i r e t n i l... - Page 28 INST INST INST INST INSTALLA ALLA ALLA ALLA ALLATION TION TION TION TION 4-6.3 Connections to Dualstream - 125, 150, 210 and 300 Cylinders DOMESTIC DOMESTIC UNVENTED HOT WATER COLD WATER 22mm CYLINDER 22mm FROM MAINS HTPV 22mm VALVE COMBINATION VALVE ACCUMULATOR SECONDARY...
- Page 29 INST INST INSTALLA INST INST ALLA ALLA ALLA ALLATION TION TION TION TION 4-6.4 Connections to Dualstream - 500 Cylinder DOMESTIC HOT WATER 28mm DOMESTIC FROM MAINS 28mm COLD WATER 28mm TPRV VALVE ACCUMULATOR COMBINATION VALVE SECONDARY DOMESTIC HOT WATER (PLUGGED) 4 4 4 4 4 TUNDISH...
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Page 30: Section 5 Commissioning
Should the commissioning not be carried out, then the manufacturers guarantee and any extended warranty, will become null and void. The Guarantee Form MUST be completed and returned to GAH (HEATING PRODUCTS) in the prepaid envelope provided. 5-1.1 Commissioning Procedure Check accumulator pressure is 1.5 Bar below the mains pressure - minimum 0.5... -
Page 31: Handing Over
COMMISSIONING 5-1.1 Accumulator Pressure Accumulators are supplied by GAH with a preset air charge of 2 Bar (28/30psi). The Combination Valve supplied with the Dualstream system has an integral pressure reducing valve fixed at 3.5 Bar. Therefore there is a pressure differential of 1.5 bar between the system pressure and the air charge of the Accumulator. -
Page 32: Section 6 Servicing
SERVICING SERVICING SERVICING SERVICING SERVICING Routine Service The Dualstream system should have a routine service at least once in 12 months. IMPORTANT Always turn off the heating system and electricity supply to the Dualstream before working on the Dualstream System. 6-1.1 Service Procedure Confirm with customer service history and locate Benchmark Logbook. -
Page 33: Section 7 Fault Finding
GAH (HEATING PRODUCTS). Check mains supply - it may have been interrupted. Check water softener (when fitted) is operating correctly. Indirect cylinder coils may be fractured, consult GAH Heating Products. Hot water discoloured 7 7 7 7 7... - Page 34 Notes...
- Page 35 Notes...
- Page 37 GAH (Heating Products) Ltd. Building 846, Bentwaters Parks, Rendlesham, Woodbridge, Suffolk IP12 2TW www. gah.co.uk Tel: 01394 421160 Fax: 01394 421170 email: mail@gah.co.uk...