Bosch 520-HN -L, Manual

Page: 8 / 36

6 720 644 942 (2014/11) 520 HN
8 | Appliance details
3.2 Unpacking the 520 HN heater
Before installing the unit, be certain you have the correct
heater for your type of Gas - Propane or Natural Gas.
Identification labels are found on the shipping box, and on the
rating plate which is located on the right side panel of the cover.
▶ Installer must fill out checklist on back cover to provide
details in case service or warranty coverage is
required.
Fig. 2 Rating plate
[A] Serial number
[B] Type of gas
The box includes:
•
Hot and cold water connection fittings
• Mounting screws
• Product registration card
• Installation manual
• Incandescent particle tray
Do not lose this manual, there is a charge for a replacement .
Please complete and return the enclosed product registration
card.
The 520HN is not approved or designed for:
• Manufactured (mobile) homes, RV's or boats
• Heating or other recirculating/pumping applications*
• Solar/preheat backup or high temperature booster use
• Installation in a bathroom or other occupied rooms
normally kept closed.
* This includes domestic hot water circulator pump loop
systems that may be installed in home hot water system prior to
installing this unit. An approved recirculation design can be
found in chapter 4.9.
3.3 General rules to follow for safe operation
1. You should follow these instructions when you install your
heater. In the United States: The installation must conform with
local codes or, in the absence of local codes, the National Fuel
Gas Code ANSI Z223.1/NFPA 54.
In Canada: The Installation should conform with CGA
B149.(1,2) INSTALLATION CODES and /or local installation
codes.
2. Carefully plan where you install the heater. Proper
clearances must be followed.
- 45F rise @ 4.1 gpm
- 50F rise @ 3.7 gpm
- 55F rise @ 3.4 gpm
- 65F rise @ 2.8 gpm
- 77F rise @ 2.4 gpm
- 90F rise @ 2.0 gpm
Connections: Bottom of heater
Dimensions
Depth inches 8.66” (220 mm)
Width inches 16.73” (425 mm)
Height inches 25.75” (655 mm)
Weight pounds (kg) 35 pounds (16 kg)
Gas types
Natural Gas
LP Gas
Venting
Natural Draft
Vent diameter inches 5" or 6"
Minimum height feet 6* with no elbows
Vertical termination through roof or into chimney.
Sidewall termination only with AQ4 power vent kit
1) Depending on gas pressure and altitude.
Table 2