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Appliance Details - Bosch 940 ESO Instruction Manual

Suitable for heating potable water and space heating
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2

Appliance details

2.1
Features
Parts
Key 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.
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.
Features
• Real-time
diagnostics
informational purposes
• LCD Display with backlight
• On/Off and Temperature control switches
• Reset button
• Program button (Selectable temperature default)
• Failure codes for easy diagnostics and repair
• Easily removable one-piece cover
• Built in freeze prevention
Accessories (Bosch part #)
• Optional wireless remote control accessory to
operate with the appliance (TSTAT2)
• Cascading kit (7709003962)
• External water filter (8703305356)
• Gas conversion kit (8719002176)
• Pipe Cover (PTPCES)
• Recess box (7736500043)
• Pressure relief valve (FWL-2).
BOSCH is constantly improving its
i
products, therefore specifications are
subject to change without prior notice.
1) The freeze prevention kit is designed to provide
protection for the water heater down to approximately
5°F for short term conditions only. It will not protect the
appliance in areas where the temperature is routinely
expected to be below freezing.
- The freeze prevention kit will not protect plumbing
outside the appliance from freezing. Precautions should
be taken.
6 720 644 956
for
troubleshooting/
1)
.
2.2
Specifications (Technical data)
Approved in US/Canada
Capacity
Maximum flow rate: 7.15 GPM (27 l/min) at a 45°F
(25°C) rise.
Maximum output
160,500 Btu/h (47.0 kW)
Maximum input
199,000 Btu/h (58.3 kW)
Efficiency in %
Thermal efficiency > 82%
Min. Input
19,900 Btu/h (5.8 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: 8" - 13" water column
• Natural Gas: 3.5" - 10.5" water column.
* To measure gas pressure, see Measuring Gas
Pressure, chapter 7.6, page 25.
Water
• Hot water connection (inches) - ¾"
• Cold water connection (inches) - ¾"
• Water valve material: Polymer (PPS) (Polypropylene
Sulfid)
• Minimum water flow: 0.5 gallon/minute (1,9 l/m).
Note: Activation varies with inlet water temperatures
from 0.5 - 1.6 gallon/minute (1.9 - 6.1 l/m).
• Minimum recommended water pressure: 30 PSI
(2.07 bar).
• Minimum well pressure 40 psi, see page 21.
• Connections:
– Bottom of heater
Combustion
• Design is NOx compliant with SCAQMD require-
ments - rule 1146,2 approved type 1 appliances
• CO  250 ppm (measured)
• CO
level set from factory, see chapter 10.4, page
2
34.
Appliance details
.
5

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