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Specifications (Technical Data) - Bosch 660 EF User Manual

Indoor model/ natural gas/lp gas boilers
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Appliance details
2.2

Specifications (Technical data)

Approved in US/Canada
Capacity
Maximum flow rate: 5.3 GPM (20 l/min) at a 45°F
(25°C) rise.
Maximum Input
140,000 Btu/h (41,03 kW)
Minimum Input
20,000 Btu/h (5.67 kW)
Temperature Control
Selection range: 100°F (37°C) - 160°F (70°C)
Default temperature: 120°F (50°C)
Temperature Settings using the remote controller:
USA
100- 150 °F (5°F intervals), 160 °F
Canada
37-48°C (In 1°C intervals), 50-70°C (In 5°C intervals)
Gas Requirement
Gas connection (inches) - ¾"
Inlet gas pressure under operation (with a high hot
water flow rate)
• Propane: 8" - 14" water column
• Natural Gas: 4" - 10.5" water column.
Power Supply Consumption
Freeze Prevention 141W.
Water
• Hot water connection (inches) - ¾"
• Cold water connection (inches) - ¾"
• Minimum water flow: 0.5 gallon/minute (2 l/m)
Note: The capacity may differ slightly, depending on
the water pressure, water supply, piping conditions,
and water temperature
• Water pressure recommend: 29 to 70 psi
• Connections:
– Bottom of heater
Dimensions
• Depth (in): 6.7" (170 mm)
• Width (in): 13.8" (350 mm)
• Height (in): 20.5" (520 mm)
• Weight: 36 pounds (16.3 kg).
Gas types
Natural Gas.
LP Gas.
Voltage
120 V AC (60 Hz) nominal
8
Safety devices
• Flame Rod
• Thermal Fuse
• Lightning Protection Device (ZNR)
• Overheat Prevention Device
• Freezing Prevention Device
• Fan Rotation Detector.
If this water heater is being installed at an
i
elevation of 2,000' (610m) or higher,
disconnect the connector labeled "High
Elevation Disconnect". This connector is
located inside the unit.
6 720 644 063

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