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Appliance details
2 Appliance details
2.1 Features
Parts
• Touch pad interface control
• High power pre-mix compact burner with low NOx
emissions
• Modulating gas valve with constant gas to 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 eciency Ceramat burner
• Compact space saver: mounts on a wall with a
supplied bracket.
• Easily removable one-piece cover.
Features
• LCD Display
• On/O and temperature control switches
• Reset button
• Program key (selectable temperature)
• Failure codes for easy diagnostics and repair
• Diagnostic mode for trou bleshooting/informational
purposes
Accessories
• Optional wireless remote control accessory to
remotely set temperature (Part # TSTAT2) .
• Horizontal vent termination kit (Part # AQ3) .
2.2 2400 E Specifications (Technical
data)
Approved in US/Canada
Capacity
Maximum ow rate: 6.35 GP M (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 eciency 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” NPT
Inlet gas pressure under operation (with a high hot
water ow rate)*
• Propane: 11” - 14” water column
• Natural Gas: 5” - 14” water column.
* To measure gas pressure, see Measuring gas
pressure, chapter 3.8.
Venting
A condensate trap is integrated into the exhaust ue
gas collar of the heater, the supplied condensate drain
tube MUST be installed to it for proper removal of
condensate from the trap. Ad ditional condensate traps
and drains may be necessary; see chapter 3.6 for
Venting.
Water
• Hot water connection (inches) - ¾” NPT
• Cold water connection (inches) - ¾” NPT
• Water valve material: Polymer (PPS) (Polypropylene
Suld)
• Minimum water ow for activation: 0.8 gallon/minute
(3 l/m)
• Minimum recommended water pressure: 30 PSI
(2.07 bar)
• Connections:
– Bottom of heater
Combustion
• NOx ≤ 55 ppm
• CO ≤ 300 ppm
i
BOSCH is constantly improving its
products, therefore specications are
subject to change without prior notice.