Bosch GWH C 920 ES - Specifications (Technical Data)

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Appliance details
5
2.2 GWH C 920 ES and GWH C 920 ESC
Specifications (Technical data)
Approved in US/Canada
Capacity
Maximum flow rate: 9.2 GPM (35 l/min) at a 45°F
(25°C) rise. (with sufficient water pressure)
Maximum output
210,000 Btu/h (61.5 kW)
Maximum input
225,000 Btu/h (65.9 kW)
Efficiency in %
Thermal efficiency > 94%
Minimum Input
25,000 Btu/h (7.3 kW)
Temperature Control
GWH C 920 ES:
• Selection range: 100°F (38°C) - 140°F (60°C).
GWH C 920 ESC:
• Selection range: 100°F (38°C) - 180°F (82°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 3.13, page 29.
Water
• Hot water connection (inches) - ¾"
• Cold water connection (inches) - ¾"
• Water valve material: Polymer (PPS) (Polypropylene
Sulfid)
• Minimum water flow: 0.65 gallon/minute (2.5 l/m)
Note: Activation varies with inlet water temperatures
from 0.65 - 1.6 gallon/minute (2.5 - 6.1 l/m).
• Minimum recommended water pressure: 30 PSI
(2.07 bar)
• Minimum well pressure 40 psi, see page 25.
• Connections:
– Bottom of heater
Combustion
• NOx ≤ 55 ppm
• CO ≤ 290 ppm (measured)
• CO
2
level set from factory, see chapter 6.5, page 37.
Dimensions
• Depth (in): 11¼" (286 mm)
• Width (in): 17
7
/
8
" (452 mm)
• Height (in): 30½" (775 mm)
• Weight: 88 pounds (40 kg).
Gas types
Natural Gas.
LP Gas.
Voltage
120 V AC (60 Hz) nominal
Amperage
Idle - 40 mA
Operation - ≤ 2.5 A
Noise
45 - 65 db (A)
Safety devices
• Flame failure device (ionization flame rod sensor)
• Pressure relief valve (supplied with heater)
• Overheat prevention (temperature limiter/ECO)
• Outlet temperature sensor
• Backflow temperature sensor
• Exhaust gas temperature sensor.
Water protection
IP X4 (protection against water drops)
i
If appliance is installed at elevations above
2000ft, refer to table 12, page 18.