Grant HPMONO/IND125, Installation, Servicing And User Instructions Manual

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1 INTRODUCTION 4
1.1 Installation requirements 4
1.2 Water supply requirements 4
1.3 Location 4
1.4 Storage and handling 4
1.5 About your cylinder 4
1.6 Open vented hot water systems 4
1.7 Primary circuit pipework 4
connections
1.8 Cylinder by-pass 4
1.9 Secondary circuit pipework 5
connections
1.10 Taps and fittings 5
1.11 Hard water scaling 5
1.12 Insulation 5
1.13 Health and Safety 5
2 TECHNICAL DATA 6
2.1 Cylinder technical data 6
2.2 Product contents 8
2.3 Dimensions 9
2.4 Connections and Controls 14
3 PRIMARY CIRCUIT INSTALLATION 17
3.1 Grant Monowave HP cylinders 17
with buffer
3.2 Primary connections 17
3.3 The 2-Port Valve 17
3.4 Hard Water Areas 17
4 SECONDARY CIRCUIT INSTALLATION 18
4.1 General 18
4.2 Cold Water Inlet Manifold 18
4.3 Installation 18
4.4 Expansion Vessel 19
4.5 Temperature and Pressure Relief 19
Valve
4.6 Hot water Supply 19
4.7 Prevention of Scaling 19
4.8 Secondary Return 19
4.9 Tundish 20
4.10 Discharge Pipe 20
4.11 Discharge Pipe Sizing 20
4.12 Worked Example 20
4.13 Discharge Pipe Arrangement 21
5 ELECTRICAL 22
5.1 Immersion Heater 22
5.2 Immersion Heater Wiring Instructions 22
5.3 Immersion Heater Safety Cut-Out 23
5.4 Dual Thermostat 23
5.5 2-Port Valves 23
5.6 Heat pump interface box 23
5.7 "S Plan" Schematic and Wiring 24
Diagrams
Contents Page 3
6 COMMISSIONING, DRAINING DOWN 27
AND SAFETY
6.1 Filling the Cylinder 27
6.2 Draining Down 27
6.3 Immersion Heater Safety Cut-Out 27
6.4 Cold Water Discharge from Tundish 28
6.5 Hot Water Discharge from Tundish 28
6.6 Expansion Vessel 28
6.7 Setting the Cylinder By-Pass 28
6.8 Customer Handover 28
7 MAINTENANCE 29
7.1 Servicing and Maintenance 29
7.2 Inlet Manifold Assembly 29
7.3 Expansion Relief Valve Cartridge 29
7.4 Expansion Vessel 29
8 FAULT FINDING 30
8.1 Intermittent Water Discharge 30
8.2 Constant Water Discharge 30
8.3 No Flow from Hot Water Taps 31
8.4 Cold Water Flow from Hot Water 31
Taps
8.5 Excessive Hot Water from Taps 32
9 SPARE PARTS 33
9.1 Spare Parts 33
10 PRODUCT FICHE 34
11 END OF LIFE INFORMATION 34
12 USER INSTRUCTIONS 35
12.1 User Instructions 35
13 GUARANTEE 36
CONTENTS