Bosch Appliances 2400E LP, 2400E NG - page 31

6 720 608 263

Maintenance and service

31

Fig. 43 Adjusting P2 CO2 level

3. Verify both P1 and P2 CO2 readings are within the

ranges specified in table 10. Repeat steps 1 and 2 as

necesssary until CO2 values are within the specified

ranges.

4. Once CO2 values are within the specified ranges,

verify the CO readings on P1 do not exceed 300ppm

(follow local codes). If values exceed this limit, inspect

vent system and fin coils (Chapter5.1) for blockage.

D. Returning to Service:

1. Return slotted screw cover to original position.

2. Reinstall Torx cover.

3. Remove CO2 analyzer probe and reinstall flathead

screw with gasket in exhaust collar.

4. Install front cover.

5. Turn ON/OFF switch to the OFF (O) position and

then back to the ON (I) position.

6. Heater is ready for normal operation.

Final Readings

P2 CO2 Reading: % CO2

P1 CO2 Reading: % CO2

CO2 level Max CO

level

Nat. Gas

max. input P1 9.7 ± 0.3 % 300 ppm

min. input P2 9.5 ± 0.5 %

LP Gas

max. input P1 10.7 ± 0.3 % 300 ppm

min. input P2 10.5 ± 0.5 %

* Final reading must be confirmed with the front cover on,

CO2 levels increase when the cover is installed.

Table 10

Contents

Main MODEL 2400E NG and 24 00E LP - INDOOR MODEL (Intended for variable flow applications) 2400 E NG - Natural Gas 2400 E LP - Liquefied Petroleum (LP) Gas Index 1 Warning Page 2 Appliance details i 2.1 Features 2.2 2400 E Specifications (Technical data) 2.3 Unpacking the 2400 E heater 2.4 General rules to follow for safe operation 2.5 Dimensions and Minimum installation clearances 3 Installation instructions i 3.1 Introduction 3.2 Proper location for installing your heater 3.3 Heater placement and clearances 3.4 Mounting installation 3.5 Combustion air requirements Page 3.6 Venting Page Page Page Page Page Installation instructions Recommended exhaust vent terminator clearances Table 6 Fig. 17 Ref. Description Minimum distance Page 3.7 Gas piping & connections 6 720 608 263 Installation instructions FOR NATURAL GAS Fig. 22 FOR LP GAS 3.8 Measuring gas pressure 3.9 Water connections 3.10 Electrical connections 3.12 Recirculation application 4 Operation instructions 4.1 For your safety, read before oper- ating your water heater 4.2 Power 4.3 Temperature selection Page 4.4 Use of optional remote control accessory i 4.5 Operation 4.6 Reset button 4.7 Program button 4.8 Locked condition 5 Maintenance and service 5.1 Annual maintenance 5.2 Winterizing for seasonal use 5.3 Mineral scale build-up 5.4 Adjusting CO Page Page 5.5 Control board diagnostics 6Troubleshooting 6.1 Introduction 6.2 Burners do not ignite when hot water is turned on 6.3 Water is too hot 6.4 Water is not hot enough 6.5 Low water flow/pressure 6.6 Hot water temperature fluctuates at tap 6.7 Noisy burner/heater during operation Page 6.8 Error code diagnostics Part numbers subject to change. 5. 17 and Table 6 on page 17). Cross Page Page Page Electrical diagram 7 Electrical diagram Fig. 44 Electrical scheme Page 9 Interior components diagram and parts list 9.1 Interior components Page Interior components diagram and parts list 9.3 Parts list Table 13 Item Description Reference 10 Protecting the environment 11 Twelve Year Limited Warranty