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Appliance details
2
Appliance details
2.1
520 PN
specifications (Technical
data)
Approved in US/Canada
Capacity
520 PN: 4.3 GPM
Maximum output
520 PN: 91 525 Btu/hr
Maximum input
520 PN: 117 000 Btu/hr
Efficiency in %
Recovery efficiency 78%
Min. Output
520 PN: 23 906 Btu/hr
Gas Requirement
Gas connection (inches) - ¾” NPT
Inlet gas pressure under maximum operation*
• Propane: 10.5” - 14” water column
• Natural Gas: 5.7” - 14” water column.
* To measure Gas Pressure, see Measuring Gas
Pressure, chapter 3.8.
Venting
• Natural Draft
• Vent diameter (inches) - 5”
• Minimum height (feet) - 6’ with no elbows
• Vertical termination
• Sidewall termination only with AQ4 power vent kit.
Water
• Hot water connection (inches) - ½” NPT
• Cold water connection (inches) - ½” NPT
• Water valve material: Fibreglass - reinforced
polyamide (PA)
• Minimum water flow: 0.5 gallon/minute (1.9 l/m)
• Minimum recommended water pressure: 30 PSI
(2.07 bar)
• Connections:
– Bottom of heater
Dimensions
520 PN:
• Depth (in): 8.66” (220 mm)
• Width (in): 16.73” (425 mm)
• Height (in): 25.75” (655 mm)
• Weight: 35 pounds (16 kg).
Gas types
Natural Gas.
LP Gas
Safety devices
• Flame failure device (ionization flame rod sensor)
• Pressure relief valve (Available as accessory)
• Over heat prevention (temperature limiter).
Accessories (Bosch part #)
• Pressure relief valve (FWL-2)
• Freeze prevention kit (7709003775)
1)
.
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.
Summary of Contents for 520-PN-L
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