Appliance details

2Appliance details

2.1Features

Parts

•Touch Pad interface control

•High power pre-mix compact burner with low Nox emissions

•Modulating Gas Valve with constant gas:air ratio control

•Modulating water valve for improved comfort and temperature control.

Safety

•Flame sensor (ionization) rod

•Overheat sensor

•Temperature limiter

•Fan speed monitoring.

High Quality Materials for Long Working Life

•Copper heat exchanger

•High efficiency Ceramat Burner

•Compact space saver: mounts on a wall with a supplied bracket.

•Easily removable one-piece cover.

Features

•LCD Display

•On/Off and Temperature control switches

•Reset button

•Program Key (Selectable temperature default)

•Failure codes for easy diagnostic and repair. Accessories

•Optional wireless remote control accessory to operate with the appliance

•Vent termination kit.

i

BOSCH is constantly improving its

products, therefore specifications are

subject to change without prior notice.

 

 

2.22400 E Specifications (Technical data)

Approved in US/Canada

Capacity

Maximum flow rate: 6.35 GPM (24 l/min) at a 45°F (25°C) rise.

Maximum output

142,968 Btu/h (41.8 kW)

Maximum input

175,000 Btu/h (51.2 kW)

Efficiency in %

Recovery efficiency 86.5%

Min. Output

31,131 Btu/h (9.1 kW)

Temperature Control

Selection range: 100°F (38°C) - 140°F (60°C)

Default temperature: 122°F (50°C)

Stability: +/- 2°F (+/- 1°C)

Gas Requirement

Gas connection (inches) - ¾”

Inlet gas pressure under operation (with a high hot water flow rate)*

•Propane: 11” - 14” water column

•Natural Gas: 5” - 14” water column.

*To measure Gas Pressure, see Measuring Gas Pressure, chapter 2.12.

Venting

A condensate trap is integrated into the exhaust flue gas collar of the heater, the supplied condensate drain tube must be installed to it for proper removal of condensate from the trap. See chapter 2.9 for Venting on page 9.

Water

•Hot water connection (inches) - ¾”

•Cold water connection (inches) - ¾”

•Water valve material: Polymer (PPS) (Polypropylene Sulfid)

•Minimum water flow: 0.8 gallon/minute (3 l/m)

•Minimum recommended water pressure: 30 PSI (2.07 bar)

•Connections:

– Bottom of heater

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