Installation Manual

6 720 608 542
2
Index
Index
1 Warning 3
2 Appliance details 4
2.1 Features 4
2.2 GWH 2700 ES Specifications
(Technical data) 5
2.3 Unpacking the GWH 2700 ES heater 6
2.4 General rules to follow for safe operation 7
2.5 Dimensions and Minimum
installation clearances 8
3 Installation instructions 9
3.1 Tools required for installation 9
3.2 Introduction 9
3.3 Venting 9
3.4 Combustion air requirements 19
3.5 Proper location for installing your heater 20
3.6 Heater placement and clearances 20
3.7 Mounting installation 20
3.8 Gas piping & connections 21
3.9 Water connections 24
3.10 Water quality 24
3.11 Domestic hot water recirculation 25
3.12 Measuring gas pressure 25
4 Electrical connections 27
4.1 Electrical power supply 27
4.2 Position of the fuses in control unit 27
5 Operation instructions 28
5.1 LCD Display functions 28
5.2 For your safety read before operating
your water heater 29
5.3 Power 29
5.4 Temperature selection 29
5.5 Use of optional remote control
accessory (part no. TSTAT2) 30
5.6 Operation 30
5.7 Reset button 30
5.8 Program button 30
5.9 Locked condition 30
6 Maintenance and service 31
6.1 Annual maintenance 31
6.2 Winterizing for seasonal use 31
6.3 Mineral scale build-up 32
6.4 Adjusting CO
2
(carbon dioxide) 32
6.5 Program values 35
6.6 Control board diagnostics 36
7 Troubleshooting 37
7.1 Introduction 37
7.2 Burner do not ignite when hot
water is turned ON 37
7.3 Water is too hot 37
7.4 Water is not hot enough 37
7.5 Low water flow/pressure 38
7.6 Hot water temperature fluctuates at tap 38
7.7 Noisy burner/heater during operation 38
8 Problem solving 40
8.1 Error code diagnostics 40
9 Electrical diagram 44
10 Sensor resistance charts 45
11 GWH 2700 ES Functional scheme 47
12 Interior components diagram
and parts list 48
12.1 Interior components 48
12.2 Components diagram 50
13 Protecting the environment 56
14 Limited Warranty 57