Installation instructions

3.12 Measuring gas pressure

Confirm gas pressure upon installation.

Connecting manometer

BShut off gas supply at installer supplied shutoff valve for this water heater.

BRemove front cover and locate inlet gas pressure measuring point (see Fig. 32).

B Loosen screw inside left test point fitting (do not remove) and connect manometer tube to test point. Remove screw completely if correct size tapping is available.

Static Pressure Test

BTurn gas supply back on.

BRecord static gas pressure reading in table 11.

Operating Pressure Test

BPress ON/OFF button to turn off the appliance.

BPress and hold "Program" (P) button and press ON/ OFF button to turn appliance ON.

Fig. 31

B As soon as '188' is displayed, release "Program"

, button and the display should read P2.

B Press or until P1 appears.

Note: While in this mode the appliance will run constantly at maximum power and allow maximum water flow.

For inlet gas pressure adjustment consider the following table:

Gas type

NG

LPG

 

 

 

 

3.5” WC

8” WC

 

 

 

Table 10 Minimum inlet gas pressure under full operation

B Record lowest operating gas pressure reading in table 11.

Gas pressures lower than 3.5" W.C. for Natural Gas or 8" W.C. for LPG will result in insufficient degree rise to the hot water being used, reduced hot water volume, possible error code faults and must be corrected. See Gas Connections, chapter 3.8, page 17.

Fig. 32 Gas pressure test port (left tapping)

Static Gas Pressure Reading (see Chapter 3.12) enter here: ___________________ Date: ___________

Operating Gas Pressure Reading (see Chapter 3.12) enter here: ___________________ Date: ___________

Table 11

HIGH ALTITUDE OPERATION (see chapter 6.4 page 28, for details)

Altitude above

Natural

Liquid

 

 

sea level

Gas:

Propane:

 

 

 

 

 

 

 

 

 

 

 

For operation at

0 - 2,000 ft

no

no

 

elevations

(0 - 610 m)

modification

modification

 

above 2,000 ft

 

 

 

 

(610 m) the

 

 

 

 

equipment

 

 

 

 

ratings shall be

 

CO2 adjustment with flue

 

reduced at the

2,000 ft - 4,500 ft

 

rate of 4% for

(610 m - 1,372 m)

gas analyzer required See

 

each 1,000 ft

section 6.4 for instructions.

 

 

 

(305 m) above

 

 

 

 

sea level

Above 4,500 ft

 

Not approved

 

(above 1,372 m)

 

 

 

 

 

 

 

 

 

 

 

Table 12

BTurn on high volume of hot water flow (at least 6 gpm) and heater will ignite. If heater display reverts to

P2, open more hot water fixtures to allow sufficient

flow. Press until P1 reappears on display.

BOperate all other gas appliances on the same gas piping system at maximum output.

22

6 720 608 782

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Bosch Appliances GWH 2400 ES LP, GWH 2400 ES NG manual Measuring gas pressure
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GWH 2400 ES NG, GWH 2400 ES LP specifications

Bosch Appliances has established a reputation for delivering high-quality and innovative home solutions, and the Bosch GWH 2400 ES LP and GWH 2400 ES NG are no exceptions. These high-efficiency water heaters are designed to provide on-demand hot water, ensuring comfort and convenience for your home.

One of the standout features of the Bosch GWH 2400 ES LP (Liquid Propane) and GWH 2400 ES NG (Natural Gas) models is their compact, space-saving design. These tankless water heaters are engineered to fit in smaller spaces, making them an ideal choice for homes with limited installation areas. Despite their compact size, both models provides a powerful performance that meets the hot water needs for multiple fixtures simultaneously, such as showers, faucets, and washing machines.

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Installation is straightforward with these models, as they can be vented using standard venting materials, saving time and costs. Additionally, the units boast a low NOx emissions rating, making them environmentally friendly choices that help homeowners reduce their carbon footprint.

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Whether you opt for the GWH 2400 ES LP or the GWH 2400 ES NG, you will experience the benefits of a powerful, efficient, and safe water heating solution tailored to your specific household needs. Bosch has truly combined technology, sustainability, and user comfort in these innovative models, solidifying their place as leaders in the home appliance market.
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