Bosch Appliances GWH 2700 ES NG, GWH 2700 ES LP, ESVVT manual Index

Index

Index

1	Warning	3
2	Appliance details	4
2.1	Features	4
2.2	Specifications (Technical data)	5
2.3	Unpacking the heater	6
2.4	General rules to follow for safe operation	7

2.5Dimensions 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	20
3.5	Proper location for installing your heater	21
3.6	Heater placement and clearances	21
3.7	Mounting installation	21
3.8	Gas piping & connections	22
3.9	Water connections	25
3.10	Water quality	25
3.11	Domestic hot water recirculation	26
3.12	Measuring gas pressure	27
4	Electrical connections	28
4.1	Electrical power supply	28
4.2	Position of the fuses in control unit	28
5	Operation instructions	29
5.1	LCD Display functions	29

5.2For your safety read before operating

	your water heater	30
5.3	Power	30
5.4	Temperature selection	30

5.5Use of optional remote control accessory

	(part no. TSTAT2)	31
5.6	Operation	31
5.7	Reset button	31
5.8	Program button	31
5.9	Locked condition	31

6	Maintenance and service	32
6.1	Annual maintenance	32
6.2	Winterizing for seasonal use	32
6.3	Mineral scale build-up	33
6.4	Adjusting CO2 (carbon dioxide)	33
6.5	Program values	36
6.6	Control board diagnostics	37

7	Troubleshooting	38
7.1	Introduction	38

7.2Burner do not ignite when hot water

	is turned ON	38
7.3	Water is too hot	38
7.4	Water is not hot enough	38
7.5	Low water flow/pressure	39
7.6	Hot water temperature fluctuates at tap	39
7.7	Noisy burner/heater during operation	39
8	Problem solving	41
8.1	Error code diagnostics	41
9	Electrical diagram	45
10	Sensor resistance charts	46
11	GWH 2700 ES Functional scheme	48
12	Interior components diagram
	and parts list	49
12.1	Interior components	49
12.2	Components diagram	51
13	Protecting the environment	57
14	Limited Warranty	58

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