Grant DuoWave Direct 170, Installation & User'S Instructions

Page: 2 / 32

2
Contents
Contents
1 Introduction &
General Requirements
3
1.1 Installation Requirements 3
1.2 Water Supply Requirements 3
1.3 Location 3
1.4 Storage and Handling 3
1.5 About Your New Cylinder 3
1.6 Open Vented Hot Water Systems 3
1.7 Taps and Fittings 3
1.8 Pipework Connections 3
1.9 Scaling 3
1.10 Insulation 3
1.11 Health and Safety 3
2 Technical Specifications 4
2.1 Technical Data - DuoWave Solar 4
2.2 Technical Data - DuoWave HP 5
2.3 Dimensions - DuoWave Solar 6
2.4 Dimensions - DuoWave HP 8
2.5 Connections and Controls 9
3 Primary Circuit Installation 11
3.1 Grant DuoWave Solar Cylinders 11
3.2 Grant DuoWave HP Cylinders 11
3.3 Systems 11
3.4 Primary Connections 11
3.5 The 2-Port Valve 11
3.6 Auxiliary Primary Connections 11
3.7 Hard Water Areas 11
4 Secondary Circuit Installation 12
4.1 Cold Water Inlet Manifold 12
4.2 Installation 12
4.3 Expansion Vessel 12
4.4 Temperature and Pressure Relief Valve 12
4.5 Hot Water Supply 12
4.6 Prevention of Scalding 12
4.7 Secondary Return 13
4.8 Tundish 13
4.9 Discharge Pipe 13
4.10 Discharge Pipe Arrangement 14
4.11 Discharge Pipe Sizing 14
4.12 Worked Example 14
5 Electrical Installation 15
5.1 Immersion Heater 15
5.2 Immersion Heater Wiring Instructions 15
5.3 Dual Thermostat 15
5.4 2-Port Valve 15
5.5 W-plan System 16
5.6 Y-plan System 17
5.7 S-plan System 18
5.8 S-plan System for Grant Aerona HP 19
5.9 Solar Thermal System 20
6 Commissioning, Draining
Down & Safety
21
6.1 Filling Cylinder 21
6.2 Draining Down 21
6.3 Safety Cut-Out 21
6.4 Cold Water Discharge from Tundish 21
6.5 Hot Water Discharge from Tundish 21
6.6 Expansion Vessel 21
6.7 Customer Handover 21
7 Maintenance 22
7.1 Servicing and Maintenance 22
7.2 Manifold Assembly 22
7.3 Pressure Reducing Valve 22
7.4 Expansion Relief Valve Cartridge 22
7.5 Expansion Vessel 22
8 Fault Finding 23
8.1 Intermittant Water Discharge 23
8.2 Constant Water Discharge 24
8.3 No Flow from Hot water Taps 24
8.4 Cold Water Flow from Hot Water Taps 25
8.5 Excessive Hot Water from Taps 26
9 Spare Parts 27
9.1 Spare Parts 27
10 User Instructions 28
10.1 User Instructions 28
11 Warranty 29
11.1 The Grant Cylinder Warranty 29
11.2 Extended Warranty 30