Lochinvar SNA285-125 Manuale Utente

       

Installation & Service Manual

TM

This appliance requires a special venting 
system. Use only approved stainless steel, 
PVC, CPVC or polypropylene pipe and 
fittings listed in Tables 2D, 2E, and 2G for 
vent pipe, and fittings.  Failure to comply 
could result in severe personal injury, 
death, or substantial property damage.

Installation must comply with local 
requirements and with the National 
Fuel Gas Code, ANSI Z223.1 for U.S. 
installations or CSA B149.1 for Canadian 
installations.

 DANGER

The Shield water heater must be vented and 
supplied with combustion and ventilation 
air as described in this section.  Ensure the 
vent and air piping and the combustion 
air supply comply with these instructions 
regarding vent system, air system, and 
combustion air quality.  See also Section 1 
of this manual.
Inspect finished vent and air piping 
thoroughly to ensure all are airtight and 
comply with the instructions provided and 
with all requirements of applicable codes.
Failure to provide a properly installed vent 
and air system will cause severe personal 
injury or death.

 WARNING

 WARNING

For closet and alcove installations, CPVC, 
polypropylene or stainless steel material 
MUST BE used in a closet/alcove structure.  
Failure to follow this warning could result 
in fire, personal injury, or death.

1.  Combustion Air Intake Connector (FIG. 2-6) - Used to 
 

provide combustion air directly to the unit from outdoors.  A 

 

fitting is provided on the unit for final connection. 

 

 

Combustion air piping must be supported per guidelines 

 

listed in the National Mechanical Code, Section 305, Table 

 

305.4 or as local codes dictate.

2.  Vent Connector (FIG.'s 2-7 thru 2-9) -  Used to provide a 
 

passageway for conveying combustion gases to the 

 

outside.  A transition fitting is provided on the unit for 

 

final connection.  Vent piping must be supported per the 

 

National Building Code, Section 305, Table 305.4 or as 

 

local codes dictate.

The Shield water heater vent and air piping can be installed 
through the roof or through a sidewall.  Follow the procedures 
in this manual for the method chosen.  Refer to the information 
in this manual to determine acceptable vent and air piping 
length.

You may use any of the vent/air piping methods covered in this 
manual.  Do not attempt to install the Shield water heater using 
any other means.

You must also install air piping from outside to the water 
heater air intake adapter unless following the Optional Room 
Air instructions on page 19 of this manual.  The resultant 
installation is direct vent (sealed combustion).

 WARNING

DO NOT mix components from different 
systems.  The vent system could fail, 
causing leakage of flue products into the 
living space.  Mixing of venting materials 
will void the warranty and certification of 
the appliance.

 WARNING Do not connect any other appliance to 

the vent pipe or multiple water heaters to 
a common vent pipe.  Failure to comply 
could result in severe personal injury, 
death, or substantial property damage.

Improper installation of venting systems 
may result in injury or death.

 CAUTION

Follow the instructions in Section 1, page 
11 of this manual when removing a water 
heater from an existing vent system.

AIR