Bosch 520-PN-L Specifications download pdf (Page 7)

6 720 644 942 (2014/11)520 HN

Appliance details | 7

Fig. 1

3 Appliance details

3.1 520 HN specifications (Technical data)

Approved in US/Canada

Capacity

520 HN: 4.36 GPM

Accessories (Bosch part #)

• Freeze prevention kit (7709003775)

• Pressure relief valve (FWL-2)

Water protection

• IP X4.

Safety devices

Flame failure device (ionization flame rod)

Pressure relief valve (Available as accessory)

Overheat prevention (temperature limiter).

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.

Capacity

Minimum input BTU/hr 30 735 Btu/hr

Maximum input BTU/hr 117 000 Btu/hr

Minimum output BTU/hr 23 906 Btu/hr

Maximum output BTU/hr 91 525 Btu/hr

Thermal efficiency

(Efficiency in %)

% 80%

Gas Requirement

Gas connection inches ¾” NPT

Inlet gas pressure under maximum operation:*

Propane water

column

10.5” - 14”

* To measure Gas Pressure, see Measuring Gas Pressure,

chapter 3.7.

Natural Gas water

column

5.7” - 14”

Water

Hot water connection inches ½ ” NPT

Cold water connection inches ½ ” NPT

Minimum water flow GPM (l/

min)

0.5 (1.9)

Minimum recommended

water pressure

PSI (bar) 30 PSI (2.07 bar)

Water valve material Fibreglass -

reinforced

polyamide (PA)

Temperatures rises:

Table 2

1 2 3 4 5 6 7 8 9 10 11 12 ... 35 36

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Bosch 520-PN-L Specifications Page 7

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