Bosch 520-PN-L Specifications download pdf (Page 11)

6 720 644 942 (2014/11)520 HN

Installation instructions | 11

Fig. 4 Minimum clearances

4 Installation instructions

4.1 Introduction

Please follow these instructions. Failure to follow instructions

may result in:

• Damage or injury.

• Improper operation.

• Loss of warranty.

If you are unable to perform the tasks required to install this

heater properly, please contact a locally licensed plumber or

gas technician.

Please contact Bosch Water Heating with any questions.

4.2 Proper location for installing your heater

Carefully select the location of the water heater. For your safety

and for proper heater operation, you must provide combustion

air to the heater and a proper exhaust vent system.

Follow the guidelines below:

▶ 1. Common installation practice is to determine the venting

system layout and penetration first, then work back to the

heater.

▶ 2. Locate the heater where venting, gas and plumbing

connections are feasible and convenient.

▶ 3. The hot water lines should be kept short to save energy.

Centrally locating the water heater is best. It is always best

to have hot water lines insulated.

4.3 Mounting Heater

The 520 HN is approved for installation on a combustible wall

provided the floor covering below the heater is

noncombustible. For installations in an alcove or closet,

maintain the minimum clearances to combustible and non-

combustible materials listed in Fig. 4.

Model 520 HN

TOP (A) 12 inches (306 mm)

FRONT (B) 4 inches (100 mm)

BACK 0 inches

SIDES 4 inches (100mm)

BOTTOM (C) 12 inches (306 mm)

Table 4

WARNING:

The water in this water heater is cold and

always remains cold except for the times

that hot water is being used.

▶ DO NOT INSTALL IN AN AREA WHERE

IT COULD FREEZE.

▶ Drain the heater entirely if freezing

temperatures are anticipated in area

where heater is installed. See chapter

5.6 for draining instructions.

▶ To prevent freeze damage from residual

water in the heater, introduce short

bursts of compressed air (20-40psi)

through these connections to remove

the residual water in the horizontal

pipes and water valve.

WARNING:

▶ Flammable materials, gasoline,

pressurized containers, or any other

items or articles that are potential fire

hazards must NOT be placed on or

adjacent to the heater. The appliance

area must be kept free of all combustible

materials, gasoline and other flammable

vapors and liquids.

WARNING:

▶ Place the heater in a location where

water leaks will do NO DAMAGE to

adjacent areas.

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Bosch 520-PN-L Specifications Page 11

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